* [PATCH v5 00/14] QEMU cpus.c refactoring part2
@ 2020-08-12 18:32 Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 01/14] cpu-timers, icount: new modules Claudio Fontana
` (14 more replies)
0 siblings, 15 replies; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Motivation and higher level steps:
https://lists.gnu.org/archive/html/qemu-devel/2020-05/msg04628.html
RFC v4 -> PATCH v5:
* in patch 2, move comment about cpus_get_elapsed_ticks from patch 3
(Philippe)
* in patch 11-14, do not create separate xxx-int.h files,
instead use the xxx-cpus.h files (Philippe)
RFC v3 -> v4:
* added patch 9: cleanup unneeded includes
* added patch 10: add handle_interrupt to the interface (Roman)
* added patch 11-14: remove accelerator specific internal functions
from global includes (Roman)
* in patch 2, removed leftover "if hvf_enabled" hunk
* in patch 2, convert if (!tcg_enabled) with more punctual if (hax_enabled)
when eating dummy APC
----
RFC v2 -> v3:
* provided defaults for all methods.
Only create_vcpu_thread is now a mandatory field. (Paolo)
* separated new CpusAccel patch from its first user, new patch nr. 2:
"cpus: prepare new CpusAccel cpu accelerator interface"
* new CpusAccel methods: get_virtual_clock and get_elapsed_ticks.
(Paolo)
In this series, get_virtual_clock has a separate implementation
between TCG/icount and qtest,
while get_elapsed_ticks only returns a virtual counter for icount.
Looking for more comments in this area.
----
RFC v1 -> v2:
* split the cpus.c accelerator refactoring into 6 patches.
* other minor changes to be able to proceed step by step.
----
* Rebased on commit 255ae6e2158c743717bed76c9a2365ee4bcd326e,
"replay: notify the main loop when there are no instructions"
[SPLIT into part1 and part2]
----
v6 -> v7:
* rebased changes on top of Pavel Dovgalyuk changes to dma-helpers.c
"icount: make dma reads deterministic"
----
v5 -> v6:
* rebased changes on top of Emilio G. Cota changes to cpus.c
"cpu: convert queued work to a QSIMPLEQ"
* keep a pointer in cpus.c instead of a copy of CpusAccel
(Alex)
----
v4 -> v5: rebase on latest master
* rebased changes on top of roman series to remove one of the extra states for hvf.
(Is the result now functional for HVF?)
* rebased changes on top of icount changes and fixes to icount_configure and
the new shift vmstate. (Markus)
v3 -> v4:
* overall: added copyright headers to all files that were missing them
(used copyright and license of the module the stuff was extracted from).
For the new interface files, added SUSE LLC.
* 1/4 (move softmmu only files from root):
MAINTAINERS: moved softmmu/cpus.c to its final location (from patch 2)
* 2/4 (cpu-throttle):
MAINTAINERS (to patch 1),
copyright Fabrice Bellard and license from cpus.c
* 3/4 (cpu-timers, icount):
- MAINTAINERS: add cpu-timers.c and icount.c to Paolo
- break very long lines (patchew)
- add copyright SUSE LLC, GPLv2 to cpu-timers.h
- add copyright Fabrice Bellard and license from cpus.c to timers-state.h
as it is lifted from cpus.c
- vl.c: in configure_accelerators bail out if icount_enabled()
and !tcg_enabled() as qtest does not enable icount anymore.
* 4/4 (accel stuff to accel):
- add copyright SUSE LLC to files that mostly only consist of the
new interface. Add whatever copyright was in the accelerator code
if instead they mostly consist of accelerator code.
- change a comment to mention the result of the AccelClass experiment
- moved qtest accelerator into accel/qtest/ , make it like the others.
- rename xxx-cpus-interface to xxx-cpus (remove "interface" from names)
- rename accel_int to cpus_accel
- rename CpusAccel functions from cpu_synchronize_* to synchronize_*
--------
v2 -> v3:
* turned into a 4 patch series, adding a first patch moving
softmmu code currently in top_srcdir to softmmu/
* cpu-throttle: moved to softmmu/
* cpu-timers, icount:
- moved to softmmu/
- fixed assumption of qtest_enabled() => icount_enabled()
causing the failure of check-qtest-arm goal, in test-arm-mptimer.c
Fix is in hw/core/ptimer.c,
where the artificial timeout rate limit should not be applied
under qtest_enabled(), in a similar way to how it is not applied
for icount_enabled().
* CpuAccelInterface: no change.
--------
v1 -> v2:
* 1/3 (cpu-throttle): provide a description in the commit message
* 2/3 (cpu-timers, icount): in this v2 separate icount from cpu-timers,
as icount is actually TCG-specific. Only build it under CONFIG_TCG.
To do this, qtest had to be detached from icount. To this end, a
trivial global counter for qtest has been introduced.
* 3/3 (CpuAccelInterface): provided a description.
This is point 8) in that plan. The idea is to extract the unrelated parts
in cpus, and register interfaces from each single accelerator to the main
cpus module (cpus.c).
While doing this RFC, I noticed some assumptions about Windows being
either TCG or HAX (not considering WHPX) that might need to be revisited.
I added a comment there.
The thing builds successfully based on Linux cross-compilations for
windows/hax, windows/whpx, and I got a good build on Darwin/hvf.
Tests run successully for tcg and kvm configurations, but did not test on
windows or darwin.
Welcome your feedback and help on this,
Claudio
Claudio Fontana (14):
cpu-timers, icount: new modules
cpus: prepare new CpusAccel cpu accelerator interface
cpus: extract out TCG-specific code to accel/tcg
cpus: extract out qtest-specific code to accel/qtest
cpus: extract out kvm-specific code to accel/kvm
cpus: extract out hax-specific code to target/i386/
cpus: extract out whpx-specific code to target/i386/
cpus: extract out hvf-specific code to target/i386/hvf/
cpus: cleanup now unneeded includes
cpus: add handle_interrupt to the CpusAccel interface
hvf: remove hvf specific functions from global includes
whpx: remove whpx specific functions from global includes
hax: remove hax specific functions from global includes
kvm: remove kvm specific functions from global includes
MAINTAINERS | 5 +-
accel/Makefile.objs | 2 +-
accel/kvm/Makefile.objs | 2 +
accel/kvm/kvm-all.c | 14 +-
accel/kvm/kvm-cpus.c | 88 +++
accel/kvm/kvm-cpus.h | 24 +
accel/qtest/Makefile.objs | 2 +
accel/qtest/qtest-cpus.c | 91 +++
accel/qtest/qtest-cpus.h | 17 +
accel/{ => qtest}/qtest.c | 13 +-
accel/stubs/Makefile.objs | 2 -
accel/stubs/hax-stub.c | 10 -
accel/stubs/hvf-stub.c | 30 -
accel/stubs/kvm-stub.c | 23 -
accel/stubs/whpx-stub.c | 47 --
accel/tcg/Makefile.objs | 1 +
accel/tcg/cpu-exec.c | 43 +-
accel/tcg/tcg-all.c | 43 +-
accel/tcg/tcg-cpus.c | 569 ++++++++++++++
accel/tcg/tcg-cpus.h | 17 +
accel/tcg/translate-all.c | 3 +-
dma-helpers.c | 4 +-
docs/replay.txt | 6 +-
exec.c | 4 -
hw/core/cpu.c | 14 +-
hw/core/ptimer.c | 8 +-
hw/i386/x86.c | 3 +-
include/exec/cpu-all.h | 4 +
include/exec/exec-all.h | 4 +-
include/hw/core/cpu.h | 14 -
include/qemu/timer.h | 24 +-
include/sysemu/cpu-timers.h | 84 ++
include/sysemu/cpus.h | 50 +-
include/sysemu/hax.h | 17 -
include/sysemu/hvf.h | 8 -
include/sysemu/hw_accel.h | 69 +-
include/sysemu/kvm.h | 7 -
include/sysemu/qtest.h | 2 +
include/sysemu/replay.h | 4 +-
include/sysemu/whpx.h | 19 -
replay/replay.c | 6 +-
softmmu/Makefile.objs | 2 +
softmmu/cpu-timers.c | 279 +++++++
softmmu/cpus.c | 1684 +++-------------------------------------
softmmu/icount.c | 497 ++++++++++++
softmmu/qtest.c | 34 +-
softmmu/timers-state.h | 69 ++
softmmu/vl.c | 11 +-
stubs/Makefile.objs | 6 +-
stubs/clock-warp.c | 7 -
stubs/cpu-get-clock.c | 3 +-
stubs/cpu-get-icount.c | 21 -
stubs/cpu-synchronize-state.c | 15 +
stubs/cpus-get-virtual-clock.c | 8 +
stubs/icount.c | 52 ++
stubs/qemu-timer-notify-cb.c | 8 +
stubs/qtest.c | 5 +
target/alpha/translate.c | 3 +-
target/arm/helper.c | 7 +-
target/i386/Makefile.objs | 7 +-
target/i386/hax-all.c | 17 +-
target/i386/hax-cpus.c | 84 ++
target/i386/hax-cpus.h | 33 +
target/i386/hax-i386.h | 2 +
target/i386/hax-mem.c | 2 +-
target/i386/hax-posix.c | 13 +-
target/i386/hax-windows.c | 22 +-
target/i386/hax-windows.h | 2 +
target/i386/hvf/Makefile.objs | 2 +-
target/i386/hvf/hvf-cpus.c | 131 ++++
target/i386/hvf/hvf-cpus.h | 25 +
target/i386/hvf/hvf.c | 12 +-
target/i386/hvf/x86hvf.c | 2 +
target/i386/hvf/x86hvf.h | 1 -
target/i386/whpx-all.c | 13 +-
target/i386/whpx-cpus.c | 96 +++
target/i386/whpx-cpus.h | 34 +
target/riscv/csr.c | 8 +-
tests/ptimer-test-stubs.c | 7 +-
tests/test-timed-average.c | 2 +-
util/main-loop.c | 12 +-
util/qemu-timer.c | 14 +-
82 files changed, 2623 insertions(+), 2026 deletions(-)
create mode 100644 accel/kvm/kvm-cpus.c
create mode 100644 accel/kvm/kvm-cpus.h
create mode 100644 accel/qtest/Makefile.objs
create mode 100644 accel/qtest/qtest-cpus.c
create mode 100644 accel/qtest/qtest-cpus.h
rename accel/{ => qtest}/qtest.c (81%)
delete mode 100644 accel/stubs/hvf-stub.c
delete mode 100644 accel/stubs/whpx-stub.c
create mode 100644 accel/tcg/tcg-cpus.c
create mode 100644 accel/tcg/tcg-cpus.h
create mode 100644 include/sysemu/cpu-timers.h
create mode 100644 softmmu/cpu-timers.c
create mode 100644 softmmu/icount.c
create mode 100644 softmmu/timers-state.h
delete mode 100644 stubs/clock-warp.c
delete mode 100644 stubs/cpu-get-icount.c
create mode 100644 stubs/cpu-synchronize-state.c
create mode 100644 stubs/cpus-get-virtual-clock.c
create mode 100644 stubs/icount.c
create mode 100644 stubs/qemu-timer-notify-cb.c
create mode 100644 target/i386/hax-cpus.c
create mode 100644 target/i386/hax-cpus.h
create mode 100644 target/i386/hvf/hvf-cpus.c
create mode 100644 target/i386/hvf/hvf-cpus.h
create mode 100644 target/i386/whpx-cpus.c
create mode 100644 target/i386/whpx-cpus.h
--
2.16.4
^ permalink raw reply [flat|nested] 37+ messages in thread
* [PATCH v5 01/14] cpu-timers, icount: new modules
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:20 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface Claudio Fontana
` (13 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
refactoring of cpus.c continues with cpu timer state extraction.
cpu-timers: responsible for the softmmu cpu timers state,
including cpu clocks and ticks.
icount: counts the TCG instructions executed. As such it is specific to
the TCG accelerator. Therefore, it is built only under CONFIG_TCG.
One complication is due to qtest, which uses an icount field to warp time
as part of qtest (qtest_clock_warp).
In order to solve this problem, provide a separate counter for qtest.
This requires fixing assumptions scattered in the code that
qtest_enabled() implies icount_enabled(), checking each specific case.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
---
MAINTAINERS | 2 +
accel/qtest.c | 6 +-
accel/tcg/cpu-exec.c | 43 ++-
accel/tcg/tcg-all.c | 7 +-
accel/tcg/translate-all.c | 3 +-
dma-helpers.c | 4 +-
docs/replay.txt | 6 +-
exec.c | 4 -
hw/core/ptimer.c | 8 +-
hw/i386/x86.c | 1 +
include/exec/cpu-all.h | 4 +
include/exec/exec-all.h | 4 +-
include/qemu/timer.h | 24 +-
include/sysemu/cpu-timers.h | 81 +++++
include/sysemu/cpus.h | 12 +-
include/sysemu/qtest.h | 2 +
include/sysemu/replay.h | 4 +-
replay/replay.c | 6 +-
softmmu/Makefile.objs | 2 +
softmmu/cpu-timers.c | 284 ++++++++++++++++
softmmu/cpus.c | 750 +------------------------------------------
softmmu/icount.c | 497 ++++++++++++++++++++++++++++
softmmu/qtest.c | 34 +-
softmmu/timers-state.h | 69 ++++
softmmu/vl.c | 11 +-
stubs/Makefile.objs | 4 +-
stubs/clock-warp.c | 7 -
stubs/cpu-get-clock.c | 3 +-
stubs/cpu-get-icount.c | 21 --
stubs/icount.c | 52 +++
stubs/qemu-timer-notify-cb.c | 8 +
stubs/qtest.c | 5 +
target/alpha/translate.c | 3 +-
target/arm/helper.c | 7 +-
target/riscv/csr.c | 8 +-
tests/ptimer-test-stubs.c | 7 +-
tests/test-timed-average.c | 2 +-
util/main-loop.c | 12 +-
util/qemu-timer.c | 14 +-
39 files changed, 1158 insertions(+), 863 deletions(-)
create mode 100644 include/sysemu/cpu-timers.h
create mode 100644 softmmu/cpu-timers.c
create mode 100644 softmmu/icount.c
create mode 100644 softmmu/timers-state.h
delete mode 100644 stubs/clock-warp.c
delete mode 100644 stubs/cpu-get-icount.c
create mode 100644 stubs/icount.c
create mode 100644 stubs/qemu-timer-notify-cb.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 0886eb3d2b..7dcc3ef4c8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2285,6 +2285,8 @@ F: softmmu/vl.c
F: softmmu/main.c
F: softmmu/cpus.c
F: softmmu/cpu-throttle.c
+F: softmmu/cpu-timers.c
+F: softmmu/icount.c
F: qapi/run-state.json
Human Monitor (HMP)
diff --git a/accel/qtest.c b/accel/qtest.c
index 5b88f55921..119d0f16a4 100644
--- a/accel/qtest.c
+++ b/accel/qtest.c
@@ -19,14 +19,10 @@
#include "sysemu/accel.h"
#include "sysemu/qtest.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
static int qtest_init_accel(MachineState *ms)
{
- QemuOpts *opts = qemu_opts_create(qemu_find_opts("icount"), NULL, 0,
- &error_abort);
- qemu_opt_set(opts, "shift", "0", &error_abort);
- configure_icount(opts, &error_abort);
- qemu_opts_del(opts);
return 0;
}
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 66d38f9d85..b44e92b753 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -19,6 +19,7 @@
#include "qemu/osdep.h"
#include "qemu-common.h"
+#include "qemu/qemu-print.h"
#include "cpu.h"
#include "trace.h"
#include "disas/disas.h"
@@ -36,6 +37,8 @@
#include "hw/i386/apic.h"
#endif
#include "sysemu/cpus.h"
+#include "exec/cpu-all.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/replay.h"
/* -icount align implementation. */
@@ -56,6 +59,9 @@ typedef struct SyncClocks {
#define MAX_DELAY_PRINT_RATE 2000000000LL
#define MAX_NB_PRINTS 100
+static int64_t max_delay;
+static int64_t max_advance;
+
static void align_clocks(SyncClocks *sc, CPUState *cpu)
{
int64_t cpu_icount;
@@ -65,7 +71,7 @@ static void align_clocks(SyncClocks *sc, CPUState *cpu)
}
cpu_icount = cpu->icount_extra + cpu_neg(cpu)->icount_decr.u16.low;
- sc->diff_clk += cpu_icount_to_ns(sc->last_cpu_icount - cpu_icount);
+ sc->diff_clk += icount_to_ns(sc->last_cpu_icount - cpu_icount);
sc->last_cpu_icount = cpu_icount;
if (sc->diff_clk > VM_CLOCK_ADVANCE) {
@@ -98,9 +104,9 @@ static void print_delay(const SyncClocks *sc)
(-sc->diff_clk / (float)1000000000LL <
(threshold_delay - THRESHOLD_REDUCE))) {
threshold_delay = (-sc->diff_clk / 1000000000LL) + 1;
- printf("Warning: The guest is now late by %.1f to %.1f seconds\n",
- threshold_delay - 1,
- threshold_delay);
+ qemu_printf("Warning: The guest is now late by %.1f to %.1f seconds\n",
+ threshold_delay - 1,
+ threshold_delay);
nb_prints++;
last_realtime_clock = sc->realtime_clock;
}
@@ -614,7 +620,7 @@ static inline bool cpu_handle_interrupt(CPUState *cpu,
/* Finally, check if we need to exit to the main loop. */
if (unlikely(atomic_read(&cpu->exit_request))
- || (use_icount
+ || (icount_enabled()
&& cpu_neg(cpu)->icount_decr.u16.low + cpu->icount_extra == 0)) {
atomic_set(&cpu->exit_request, 0);
if (cpu->exception_index == -1) {
@@ -655,10 +661,10 @@ static inline void cpu_loop_exec_tb(CPUState *cpu, TranslationBlock *tb,
}
/* Instruction counter expired. */
- assert(use_icount);
+ assert(icount_enabled());
#ifndef CONFIG_USER_ONLY
/* Ensure global icount has gone forward */
- cpu_update_icount(cpu);
+ icount_update(cpu);
/* Refill decrementer and continue execution. */
insns_left = MIN(0xffff, cpu->icount_budget);
cpu_neg(cpu)->icount_decr.u16.low = insns_left;
@@ -758,3 +764,26 @@ int cpu_exec(CPUState *cpu)
return ret;
}
+
+#ifndef CONFIG_USER_ONLY
+
+void dump_drift_info(void)
+{
+ if (!icount_enabled()) {
+ return;
+ }
+
+ qemu_printf("Host - Guest clock %"PRIi64" ms\n",
+ (cpu_get_clock() - icount_get()) / SCALE_MS);
+ if (icount_align_option) {
+ qemu_printf("Max guest delay %"PRIi64" ms\n",
+ -max_delay / SCALE_MS);
+ qemu_printf("Max guest advance %"PRIi64" ms\n",
+ max_advance / SCALE_MS);
+ } else {
+ qemu_printf("Max guest delay NA\n");
+ qemu_printf("Max guest advance NA\n");
+ }
+}
+
+#endif /* !CONFIG_USER_ONLY */
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index eace2c113b..f1feea20c8 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -29,6 +29,7 @@
#include "qom/object.h"
#include "cpu.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "qemu/main-loop.h"
#include "tcg/tcg.h"
#include "qapi/error.h"
@@ -65,7 +66,7 @@ static void tcg_handle_interrupt(CPUState *cpu, int mask)
qemu_cpu_kick(cpu);
} else {
atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
- if (use_icount &&
+ if (icount_enabled() &&
!cpu->can_do_io
&& (mask & ~old_mask) != 0) {
cpu_abort(cpu, "Raised interrupt while not in I/O function");
@@ -104,7 +105,7 @@ static bool check_tcg_memory_orders_compatible(void)
static bool default_mttcg_enabled(void)
{
- if (use_icount || TCG_OVERSIZED_GUEST) {
+ if (icount_enabled() || TCG_OVERSIZED_GUEST) {
return false;
} else {
#ifdef TARGET_SUPPORTS_MTTCG
@@ -146,7 +147,7 @@ static void tcg_set_thread(Object *obj, const char *value, Error **errp)
if (strcmp(value, "multi") == 0) {
if (TCG_OVERSIZED_GUEST) {
error_setg(errp, "No MTTCG when guest word size > hosts");
- } else if (use_icount) {
+ } else if (icount_enabled()) {
error_setg(errp, "No MTTCG when icount is enabled");
} else {
#ifndef TARGET_SUPPORTS_MTTCG
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 2d83013633..c39ff7b047 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -57,6 +57,7 @@
#include "qemu/main-loop.h"
#include "exec/log.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/tcg.h"
/* #define DEBUG_TB_INVALIDATE */
@@ -369,7 +370,7 @@ static int cpu_restore_state_from_tb(CPUState *cpu, TranslationBlock *tb,
found:
if (reset_icount && (tb_cflags(tb) & CF_USE_ICOUNT)) {
- assert(use_icount);
+ assert(icount_enabled());
/* Reset the cycle counter to the start of the block
and shift if to the number of actually executed instructions */
cpu_neg(cpu)->icount_decr.u16.low += num_insns - i;
diff --git a/dma-helpers.c b/dma-helpers.c
index 2a77b5a9cb..240ef4d5b8 100644
--- a/dma-helpers.c
+++ b/dma-helpers.c
@@ -13,7 +13,7 @@
#include "trace-root.h"
#include "qemu/thread.h"
#include "qemu/main-loop.h"
-#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "qemu/range.h"
/* #define DEBUG_IOMMU */
@@ -151,7 +151,7 @@ static void dma_blk_cb(void *opaque, int ret)
* from several sectors. This code splits all SGs into several
* groups. SGs in every group do not overlap.
*/
- if (mem && use_icount && dbs->dir == DMA_DIRECTION_FROM_DEVICE) {
+ if (mem && icount_enabled() && dbs->dir == DMA_DIRECTION_FROM_DEVICE) {
int i;
for (i = 0 ; i < dbs->iov.niov ; ++i) {
if (ranges_overlap((intptr_t)dbs->iov.iov[i].iov_base,
diff --git a/docs/replay.txt b/docs/replay.txt
index 70c27edb36..8952e6d852 100644
--- a/docs/replay.txt
+++ b/docs/replay.txt
@@ -184,11 +184,11 @@ is then incremented (which is called "warping" the virtual clock) as
soon as the timer fires or the CPUs need to go out of the idle state.
Two functions are used for this purpose; because these actions change
virtual machine state and must be deterministic, each of them creates a
-checkpoint. qemu_start_warp_timer checks if the CPUs are idle and if so
-starts accounting real time to virtual clock. qemu_account_warp_timer
+checkpoint. icount_start_warp_timer checks if the CPUs are idle and if so
+starts accounting real time to virtual clock. icount_account_warp_timer
is called when the CPUs get an interrupt or when the warp timer fires,
and it warps the virtual clock by the amount of real time that has passed
-since qemu_start_warp_timer.
+since icount_start_warp_timer.
Bottom halves
-------------
diff --git a/exec.c b/exec.c
index 6f381f98e2..a89ffa93c1 100644
--- a/exec.c
+++ b/exec.c
@@ -102,10 +102,6 @@ uintptr_t qemu_host_page_size;
intptr_t qemu_host_page_mask;
#if !defined(CONFIG_USER_ONLY)
-/* 0 = Do not count executed instructions.
- 1 = Precise instruction counting.
- 2 = Adaptive rate instruction counting. */
-int use_icount;
typedef struct PhysPageEntry PhysPageEntry;
diff --git a/hw/core/ptimer.c b/hw/core/ptimer.c
index b5a54e2536..c6d2beb1da 100644
--- a/hw/core/ptimer.c
+++ b/hw/core/ptimer.c
@@ -7,11 +7,11 @@
*/
#include "qemu/osdep.h"
-#include "qemu/timer.h"
#include "hw/ptimer.h"
#include "migration/vmstate.h"
#include "qemu/host-utils.h"
#include "sysemu/replay.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/qtest.h"
#include "block/aio.h"
#include "sysemu/cpus.h"
@@ -134,7 +134,8 @@ static void ptimer_reload(ptimer_state *s, int delta_adjust)
* on the current generation of host machines.
*/
- if (s->enabled == 1 && (delta * period < 10000) && !use_icount) {
+ if (s->enabled == 1 && (delta * period < 10000) &&
+ !icount_enabled() && !qtest_enabled()) {
period = 10000 / delta;
period_frac = 0;
}
@@ -217,7 +218,8 @@ uint64_t ptimer_get_count(ptimer_state *s)
uint32_t period_frac = s->period_frac;
uint64_t period = s->period;
- if (!oneshot && (s->delta * period < 10000) && !use_icount) {
+ if (!oneshot && (s->delta * period < 10000) &&
+ !icount_enabled() && !qtest_enabled()) {
period = 10000 / s->delta;
period_frac = 0;
}
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 67bee1bcb8..58cf2229d5 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -34,6 +34,7 @@
#include "sysemu/numa.h"
#include "sysemu/replay.h"
#include "sysemu/sysemu.h"
+#include "sysemu/cpu-timers.h"
#include "trace.h"
#include "hw/i386/x86.h"
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index fc403d456b..25b6005a91 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -407,8 +407,12 @@ static inline bool tlb_hit(target_ulong tlb_addr, target_ulong addr)
return tlb_hit_page(tlb_addr, addr & TARGET_PAGE_MASK);
}
+#ifdef CONFIG_TCG
+void dump_drift_info(void);
void dump_exec_info(void);
void dump_opcount_info(void);
+#endif /* CONFIG_TCG */
+
#endif /* !CONFIG_USER_ONLY */
/* Returns: 0 on success, -1 on error */
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 3cf88272df..e019b505a5 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -25,7 +25,7 @@
#ifdef CONFIG_TCG
#include "exec/cpu_ldst.h"
#endif
-#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
/* allow to see translation results - the slowdown should be negligible, so we leave it */
#define DEBUG_DISAS
@@ -497,7 +497,7 @@ static inline uint32_t tb_cflags(const TranslationBlock *tb)
static inline uint32_t curr_cflags(void)
{
return (parallel_cpus ? CF_PARALLEL : 0)
- | (use_icount ? CF_USE_ICOUNT : 0);
+ | (icount_enabled() ? CF_USE_ICOUNT : 0);
}
/* TranslationBlock invalidate API */
diff --git a/include/qemu/timer.h b/include/qemu/timer.h
index 6a8b48b5a9..2f7afc1f68 100644
--- a/include/qemu/timer.h
+++ b/include/qemu/timer.h
@@ -166,8 +166,8 @@ bool qemu_clock_expired(QEMUClockType type);
*
* Determine whether a clock should be used for deadline
* calculations. Some clocks, for instance vm_clock with
- * use_icount set, do not count in nanoseconds. Such clocks
- * are not used for deadline calculations, and are presumed
+ * icount_enabled() set, do not count in nanoseconds.
+ * Such clocks are not used for deadline calculations, and are presumed
* to interrupt any poll using qemu_notify/aio_notify
* etc.
*
@@ -224,13 +224,6 @@ void qemu_clock_notify(QEMUClockType type);
*/
void qemu_clock_enable(QEMUClockType type, bool enabled);
-/**
- * qemu_start_warp_timer:
- *
- * Starts a timer for virtual clock update
- */
-void qemu_start_warp_timer(void);
-
/**
* qemu_clock_run_timers:
* @type: clock on which to operate
@@ -791,12 +784,6 @@ static inline int64_t qemu_soonest_timeout(int64_t timeout1, int64_t timeout2)
*/
void init_clocks(QEMUTimerListNotifyCB *notify_cb);
-int64_t cpu_get_ticks(void);
-/* Caller must hold BQL */
-void cpu_enable_ticks(void);
-/* Caller must hold BQL */
-void cpu_disable_ticks(void);
-
static inline int64_t get_max_clock_jump(void)
{
/* This should be small enough to prevent excessive interrupts from being
@@ -850,13 +837,6 @@ static inline int64_t get_clock(void)
}
#endif
-/* icount */
-int64_t cpu_get_icount_raw(void);
-int64_t cpu_get_icount(void);
-int64_t cpu_get_clock(void);
-int64_t cpu_icount_to_ns(int64_t icount);
-void cpu_update_icount(CPUState *cpu);
-
/*******************************************/
/* host CPU ticks (if available) */
diff --git a/include/sysemu/cpu-timers.h b/include/sysemu/cpu-timers.h
new file mode 100644
index 0000000000..07d724672f
--- /dev/null
+++ b/include/sysemu/cpu-timers.h
@@ -0,0 +1,81 @@
+/*
+ * CPU timers state API
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#ifndef SYSEMU_CPU_TIMERS_H
+#define SYSEMU_CPU_TIMERS_H
+
+#include "qemu/timer.h"
+
+/* init the whole cpu timers API, including icount, ticks, and cpu_throttle */
+void cpu_timers_init(void);
+
+/* icount - Instruction Counter API */
+
+/*
+ * Return the icount enablement state:
+ *
+ * 0 = Disabled - Do not count executed instructions.
+ * 1 = Enabled - Fixed conversion of insn to ns via "shift" option
+ * 2 = Enabled - Runtime adaptive algorithm to compute shift
+ */
+int icount_enabled(void);
+/*
+ * Update the icount with the executed instructions. Called by
+ * cpus-tcg vCPU thread so the main-loop can see time has moved forward.
+ */
+void icount_update(CPUState *cpu);
+
+/* get raw icount value */
+int64_t icount_get_raw(void);
+
+/* return the virtual CPU time in ns, based on the instruction counter. */
+int64_t icount_get(void);
+/*
+ * convert an instruction counter value to ns, based on the icount shift.
+ * This shift is set as a fixed value with the icount "shift" option
+ * (precise mode), or it is constantly approximated and corrected at
+ * runtime in adaptive mode.
+ */
+int64_t icount_to_ns(int64_t icount);
+
+/* configure the icount options, including "shift" */
+void icount_configure(QemuOpts *opts, Error **errp);
+
+/* used by tcg vcpu thread to calc icount budget */
+int64_t icount_round(int64_t count);
+
+/* if the CPUs are idle, start accounting real time to virtual clock. */
+void icount_start_warp_timer(void);
+void icount_account_warp_timer(void);
+
+/*
+ * CPU Ticks and Clock
+ */
+
+/* Caller must hold BQL */
+void cpu_enable_ticks(void);
+/* Caller must hold BQL */
+void cpu_disable_ticks(void);
+
+/*
+ * return the time elapsed in VM between vm_start and vm_stop. Unless
+ * icount is active, cpu_get_ticks() uses units of the host CPU cycle
+ * counter.
+ */
+int64_t cpu_get_ticks(void);
+
+/*
+ * Returns the monotonic time elapsed in VM, i.e.,
+ * the time between vm_start and vm_stop
+ */
+int64_t cpu_get_clock(void);
+
+void qemu_timer_notify_cb(void *opaque, QEMUClockType type);
+
+#endif /* SYSEMU_CPU_TIMERS_H */
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index 3c1da6a018..149de000a0 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -4,33 +4,23 @@
#include "qemu/timer.h"
/* cpus.c */
+bool all_cpu_threads_idle(void);
bool qemu_in_vcpu_thread(void);
void qemu_init_cpu_loop(void);
void resume_all_vcpus(void);
void pause_all_vcpus(void);
void cpu_stop_current(void);
-void cpu_ticks_init(void);
-void configure_icount(QemuOpts *opts, Error **errp);
-extern int use_icount;
extern int icount_align_option;
-/* drift information for info jit command */
-extern int64_t max_delay;
-extern int64_t max_advance;
-void dump_drift_info(void);
-
/* Unblock cpu */
void qemu_cpu_kick_self(void);
-void qemu_timer_notify_cb(void *opaque, QEMUClockType type);
void cpu_synchronize_all_states(void);
void cpu_synchronize_all_post_reset(void);
void cpu_synchronize_all_post_init(void);
void cpu_synchronize_all_pre_loadvm(void);
-void qtest_clock_warp(int64_t dest);
-
#ifndef CONFIG_USER_ONLY
/* vl.c */
/* *-user doesn't have configurable SMP topology */
diff --git a/include/sysemu/qtest.h b/include/sysemu/qtest.h
index eedd3664f0..4c53537ef3 100644
--- a/include/sysemu/qtest.h
+++ b/include/sysemu/qtest.h
@@ -30,4 +30,6 @@ void qtest_server_set_send_handler(void (*send)(void *, const char *),
void *opaque);
void qtest_server_inproc_recv(void *opaque, const char *buf);
+int64_t qtest_get_virtual_clock(void);
+
#endif
diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h
index 5471bb514d..a140d69a73 100644
--- a/include/sysemu/replay.h
+++ b/include/sysemu/replay.h
@@ -109,12 +109,12 @@ int64_t replay_read_clock(ReplayClockKind kind);
#define REPLAY_CLOCK(clock, value) \
(replay_mode == REPLAY_MODE_PLAY ? replay_read_clock((clock)) \
: replay_mode == REPLAY_MODE_RECORD \
- ? replay_save_clock((clock), (value), cpu_get_icount_raw()) \
+ ? replay_save_clock((clock), (value), icount_get_raw()) \
: (value))
#define REPLAY_CLOCK_LOCKED(clock, value) \
(replay_mode == REPLAY_MODE_PLAY ? replay_read_clock((clock)) \
: replay_mode == REPLAY_MODE_RECORD \
- ? replay_save_clock((clock), (value), cpu_get_icount_raw_locked()) \
+ ? replay_save_clock((clock), (value), icount_get_raw_locked()) \
: (value))
/* Processing data from random generators */
diff --git a/replay/replay.c b/replay/replay.c
index 83ed9e0e24..4c1457b07e 100644
--- a/replay/replay.c
+++ b/replay/replay.c
@@ -11,10 +11,10 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/replay.h"
#include "sysemu/runstate.h"
#include "replay-internal.h"
-#include "qemu/timer.h"
#include "qemu/main-loop.h"
#include "qemu/option.h"
#include "sysemu/cpus.h"
@@ -64,7 +64,7 @@ bool replay_next_event_is(int event)
uint64_t replay_get_current_icount(void)
{
- return cpu_get_icount_raw();
+ return icount_get_raw();
}
int replay_get_instructions(void)
@@ -345,7 +345,7 @@ void replay_start(void)
error_reportf_err(replay_blockers->data, "Record/replay: ");
exit(1);
}
- if (!use_icount) {
+ if (!icount_enabled()) {
error_report("Please enable icount to use record/replay");
exit(1);
}
diff --git a/softmmu/Makefile.objs b/softmmu/Makefile.objs
index a414a74c50..9c0125f37b 100644
--- a/softmmu/Makefile.objs
+++ b/softmmu/Makefile.objs
@@ -7,6 +7,8 @@ obj-y += balloon.o
obj-y += ioport.o
obj-y += memory.o
obj-y += memory_mapping.o
+obj-y += cpu-timers.o
+obj-$(CONFIG_TCG) += icount.o
obj-y += qtest.o
diff --git a/softmmu/cpu-timers.c b/softmmu/cpu-timers.c
new file mode 100644
index 0000000000..64addb315d
--- /dev/null
+++ b/softmmu/cpu-timers.c
@@ -0,0 +1,284 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/cutils.h"
+#include "migration/vmstate.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "exec/exec-all.h"
+#include "sysemu/cpus.h"
+#include "sysemu/qtest.h"
+#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "qemu/seqlock.h"
+#include "sysemu/replay.h"
+#include "sysemu/runstate.h"
+#include "hw/core/cpu.h"
+#include "sysemu/cpu-timers.h"
+#include "sysemu/cpu-throttle.h"
+#include "timers-state.h"
+
+/* clock and ticks */
+
+static int64_t cpu_get_ticks_locked(void)
+{
+ int64_t ticks = timers_state.cpu_ticks_offset;
+ if (timers_state.cpu_ticks_enabled) {
+ ticks += cpu_get_host_ticks();
+ }
+
+ if (timers_state.cpu_ticks_prev > ticks) {
+ /* Non increasing ticks may happen if the host uses software suspend. */
+ timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks;
+ ticks = timers_state.cpu_ticks_prev;
+ }
+
+ timers_state.cpu_ticks_prev = ticks;
+ return ticks;
+}
+
+/*
+ * return the time elapsed in VM between vm_start and vm_stop. Unless
+ * icount is active, cpu_get_ticks() uses units of the host CPU cycle
+ * counter.
+ */
+int64_t cpu_get_ticks(void)
+{
+ int64_t ticks;
+
+ if (icount_enabled()) {
+ return icount_get();
+ }
+
+ qemu_spin_lock(&timers_state.vm_clock_lock);
+ ticks = cpu_get_ticks_locked();
+ qemu_spin_unlock(&timers_state.vm_clock_lock);
+ return ticks;
+}
+
+int64_t cpu_get_clock_locked(void)
+{
+ int64_t time;
+
+ time = timers_state.cpu_clock_offset;
+ if (timers_state.cpu_ticks_enabled) {
+ time += get_clock();
+ }
+
+ return time;
+}
+
+/*
+ * Return the monotonic time elapsed in VM, i.e.,
+ * the time between vm_start and vm_stop
+ */
+int64_t cpu_get_clock(void)
+{
+ int64_t ti;
+ unsigned start;
+
+ do {
+ start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
+ ti = cpu_get_clock_locked();
+ } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
+
+ return ti;
+}
+
+/*
+ * enable cpu_get_ticks()
+ * Caller must hold BQL which serves as mutex for vm_clock_seqlock.
+ */
+void cpu_enable_ticks(void)
+{
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ if (!timers_state.cpu_ticks_enabled) {
+ timers_state.cpu_ticks_offset -= cpu_get_host_ticks();
+ timers_state.cpu_clock_offset -= get_clock();
+ timers_state.cpu_ticks_enabled = 1;
+ }
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+}
+
+/*
+ * disable cpu_get_ticks() : the clock is stopped. You must not call
+ * cpu_get_ticks() after that.
+ * Caller must hold BQL which serves as mutex for vm_clock_seqlock.
+ */
+void cpu_disable_ticks(void)
+{
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ if (timers_state.cpu_ticks_enabled) {
+ timers_state.cpu_ticks_offset += cpu_get_host_ticks();
+ timers_state.cpu_clock_offset = cpu_get_clock_locked();
+ timers_state.cpu_ticks_enabled = 0;
+ }
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+}
+
+static bool icount_state_needed(void *opaque)
+{
+ return icount_enabled();
+}
+
+static bool icount_shift_state_needed(void *opaque)
+{
+ return icount_enabled() == 2;
+}
+
+static bool warp_timer_state_needed(void *opaque)
+{
+ TimersState *s = opaque;
+ return s->icount_warp_timer != NULL;
+}
+
+static bool adjust_timers_state_needed(void *opaque)
+{
+ TimersState *s = opaque;
+ return s->icount_rt_timer != NULL;
+}
+
+/*
+ * Subsection for warp timer migration is optional, because may not be created
+ */
+static const VMStateDescription icount_vmstate_warp_timer = {
+ .name = "timer/icount/warp_timer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = warp_timer_state_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64(vm_clock_warp_start, TimersState),
+ VMSTATE_TIMER_PTR(icount_warp_timer, TimersState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription icount_vmstate_adjust_timers = {
+ .name = "timer/icount/timers",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = adjust_timers_state_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_TIMER_PTR(icount_rt_timer, TimersState),
+ VMSTATE_TIMER_PTR(icount_vm_timer, TimersState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static const VMStateDescription icount_vmstate_shift = {
+ .name = "timer/icount/shift",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = icount_shift_state_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT16(icount_time_shift, TimersState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+/*
+ * This is a subsection for icount migration.
+ */
+static const VMStateDescription icount_vmstate_timers = {
+ .name = "timer/icount",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = icount_state_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64(qemu_icount_bias, TimersState),
+ VMSTATE_INT64(qemu_icount, TimersState),
+ VMSTATE_END_OF_LIST()
+ },
+ .subsections = (const VMStateDescription * []) {
+ &icount_vmstate_warp_timer,
+ &icount_vmstate_adjust_timers,
+ &icount_vmstate_shift,
+ NULL
+ }
+};
+
+static const VMStateDescription vmstate_timers = {
+ .name = "timer",
+ .version_id = 2,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_INT64(cpu_ticks_offset, TimersState),
+ VMSTATE_UNUSED(8),
+ VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
+ VMSTATE_END_OF_LIST()
+ },
+ .subsections = (const VMStateDescription * []) {
+ &icount_vmstate_timers,
+ NULL
+ }
+};
+
+static void do_nothing(CPUState *cpu, run_on_cpu_data unused)
+{
+}
+
+void qemu_timer_notify_cb(void *opaque, QEMUClockType type)
+{
+ if (!icount_enabled() || type != QEMU_CLOCK_VIRTUAL) {
+ qemu_notify_event();
+ return;
+ }
+
+ if (qemu_in_vcpu_thread()) {
+ /*
+ * A CPU is currently running; kick it back out to the
+ * tcg_cpu_exec() loop so it will recalculate its
+ * icount deadline immediately.
+ */
+ qemu_cpu_kick(current_cpu);
+ } else if (first_cpu) {
+ /*
+ * qemu_cpu_kick is not enough to kick a halted CPU out of
+ * qemu_tcg_wait_io_event. async_run_on_cpu, instead,
+ * causes cpu_thread_is_idle to return false. This way,
+ * handle_icount_deadline can run.
+ * If we have no CPUs at all for some reason, we don't
+ * need to do anything.
+ */
+ async_run_on_cpu(first_cpu, do_nothing, RUN_ON_CPU_NULL);
+ }
+}
+
+TimersState timers_state;
+
+/* initialize timers state and the cpu throttle for convenience */
+void cpu_timers_init(void)
+{
+ seqlock_init(&timers_state.vm_clock_seqlock);
+ qemu_spin_init(&timers_state.vm_clock_lock);
+ vmstate_register(NULL, 0, &vmstate_timers, &timers_state);
+
+ cpu_throttle_init();
+}
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index a802e899ab..54fdb2761c 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -58,11 +58,10 @@
#include "hw/nmi.h"
#include "sysemu/replay.h"
#include "sysemu/runstate.h"
+#include "sysemu/cpu-timers.h"
#include "hw/boards.h"
#include "hw/hw.h"
-#include "sysemu/cpu-throttle.h"
-
#ifdef CONFIG_LINUX
#include <sys/prctl.h>
@@ -83,9 +82,6 @@
static QemuMutex qemu_global_mutex;
-int64_t max_delay;
-int64_t max_advance;
-
bool cpu_is_stopped(CPUState *cpu)
{
return cpu->stopped || !runstate_is_running();
@@ -116,7 +112,7 @@ static bool cpu_thread_is_idle(CPUState *cpu)
return true;
}
-static bool all_cpu_threads_idle(void)
+bool all_cpu_threads_idle(void)
{
CPUState *cpu;
@@ -128,688 +124,9 @@ static bool all_cpu_threads_idle(void)
return true;
}
-/***********************************************************/
-/* guest cycle counter */
-
-/* Protected by TimersState seqlock */
-
-static bool icount_sleep = true;
-/* Arbitrarily pick 1MIPS as the minimum allowable speed. */
-#define MAX_ICOUNT_SHIFT 10
-
-typedef struct TimersState {
- /* Protected by BQL. */
- int64_t cpu_ticks_prev;
- int64_t cpu_ticks_offset;
-
- /* Protect fields that can be respectively read outside the
- * BQL, and written from multiple threads.
- */
- QemuSeqLock vm_clock_seqlock;
- QemuSpin vm_clock_lock;
-
- int16_t cpu_ticks_enabled;
-
- /* Conversion factor from emulated instructions to virtual clock ticks. */
- int16_t icount_time_shift;
-
- /* Compensate for varying guest execution speed. */
- int64_t qemu_icount_bias;
-
- int64_t vm_clock_warp_start;
- int64_t cpu_clock_offset;
-
- /* Only written by TCG thread */
- int64_t qemu_icount;
-
- /* for adjusting icount */
- QEMUTimer *icount_rt_timer;
- QEMUTimer *icount_vm_timer;
- QEMUTimer *icount_warp_timer;
-} TimersState;
-
-static TimersState timers_state;
bool mttcg_enabled;
-/* The current number of executed instructions is based on what we
- * originally budgeted minus the current state of the decrementing
- * icount counters in extra/u16.low.
- */
-static int64_t cpu_get_icount_executed(CPUState *cpu)
-{
- return (cpu->icount_budget -
- (cpu_neg(cpu)->icount_decr.u16.low + cpu->icount_extra));
-}
-
-/*
- * Update the global shared timer_state.qemu_icount to take into
- * account executed instructions. This is done by the TCG vCPU
- * thread so the main-loop can see time has moved forward.
- */
-static void cpu_update_icount_locked(CPUState *cpu)
-{
- int64_t executed = cpu_get_icount_executed(cpu);
- cpu->icount_budget -= executed;
-
- atomic_set_i64(&timers_state.qemu_icount,
- timers_state.qemu_icount + executed);
-}
-
-/*
- * Update the global shared timer_state.qemu_icount to take into
- * account executed instructions. This is done by the TCG vCPU
- * thread so the main-loop can see time has moved forward.
- */
-void cpu_update_icount(CPUState *cpu)
-{
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- cpu_update_icount_locked(cpu);
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-}
-
-static int64_t cpu_get_icount_raw_locked(void)
-{
- CPUState *cpu = current_cpu;
-
- if (cpu && cpu->running) {
- if (!cpu->can_do_io) {
- error_report("Bad icount read");
- exit(1);
- }
- /* Take into account what has run */
- cpu_update_icount_locked(cpu);
- }
- /* The read is protected by the seqlock, but needs atomic64 to avoid UB */
- return atomic_read_i64(&timers_state.qemu_icount);
-}
-
-static int64_t cpu_get_icount_locked(void)
-{
- int64_t icount = cpu_get_icount_raw_locked();
- return atomic_read_i64(&timers_state.qemu_icount_bias) +
- cpu_icount_to_ns(icount);
-}
-
-int64_t cpu_get_icount_raw(void)
-{
- int64_t icount;
- unsigned start;
-
- do {
- start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
- icount = cpu_get_icount_raw_locked();
- } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
-
- return icount;
-}
-
-/* Return the virtual CPU time, based on the instruction counter. */
-int64_t cpu_get_icount(void)
-{
- int64_t icount;
- unsigned start;
-
- do {
- start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
- icount = cpu_get_icount_locked();
- } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
-
- return icount;
-}
-
-int64_t cpu_icount_to_ns(int64_t icount)
-{
- return icount << atomic_read(&timers_state.icount_time_shift);
-}
-
-static int64_t cpu_get_ticks_locked(void)
-{
- int64_t ticks = timers_state.cpu_ticks_offset;
- if (timers_state.cpu_ticks_enabled) {
- ticks += cpu_get_host_ticks();
- }
-
- if (timers_state.cpu_ticks_prev > ticks) {
- /* Non increasing ticks may happen if the host uses software suspend. */
- timers_state.cpu_ticks_offset += timers_state.cpu_ticks_prev - ticks;
- ticks = timers_state.cpu_ticks_prev;
- }
-
- timers_state.cpu_ticks_prev = ticks;
- return ticks;
-}
-
-/* return the time elapsed in VM between vm_start and vm_stop. Unless
- * icount is active, cpu_get_ticks() uses units of the host CPU cycle
- * counter.
- */
-int64_t cpu_get_ticks(void)
-{
- int64_t ticks;
-
- if (use_icount) {
- return cpu_get_icount();
- }
-
- qemu_spin_lock(&timers_state.vm_clock_lock);
- ticks = cpu_get_ticks_locked();
- qemu_spin_unlock(&timers_state.vm_clock_lock);
- return ticks;
-}
-
-static int64_t cpu_get_clock_locked(void)
-{
- int64_t time;
-
- time = timers_state.cpu_clock_offset;
- if (timers_state.cpu_ticks_enabled) {
- time += get_clock();
- }
-
- return time;
-}
-
-/* Return the monotonic time elapsed in VM, i.e.,
- * the time between vm_start and vm_stop
- */
-int64_t cpu_get_clock(void)
-{
- int64_t ti;
- unsigned start;
-
- do {
- start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
- ti = cpu_get_clock_locked();
- } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
-
- return ti;
-}
-
-/* enable cpu_get_ticks()
- * Caller must hold BQL which serves as mutex for vm_clock_seqlock.
- */
-void cpu_enable_ticks(void)
-{
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- if (!timers_state.cpu_ticks_enabled) {
- timers_state.cpu_ticks_offset -= cpu_get_host_ticks();
- timers_state.cpu_clock_offset -= get_clock();
- timers_state.cpu_ticks_enabled = 1;
- }
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-}
-
-/* disable cpu_get_ticks() : the clock is stopped. You must not call
- * cpu_get_ticks() after that.
- * Caller must hold BQL which serves as mutex for vm_clock_seqlock.
- */
-void cpu_disable_ticks(void)
-{
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- if (timers_state.cpu_ticks_enabled) {
- timers_state.cpu_ticks_offset += cpu_get_host_ticks();
- timers_state.cpu_clock_offset = cpu_get_clock_locked();
- timers_state.cpu_ticks_enabled = 0;
- }
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-}
-
-/* Correlation between real and virtual time is always going to be
- fairly approximate, so ignore small variation.
- When the guest is idle real and virtual time will be aligned in
- the IO wait loop. */
-#define ICOUNT_WOBBLE (NANOSECONDS_PER_SECOND / 10)
-
-static void icount_adjust(void)
-{
- int64_t cur_time;
- int64_t cur_icount;
- int64_t delta;
-
- /* Protected by TimersState mutex. */
- static int64_t last_delta;
-
- /* If the VM is not running, then do nothing. */
- if (!runstate_is_running()) {
- return;
- }
-
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- cur_time = REPLAY_CLOCK_LOCKED(REPLAY_CLOCK_VIRTUAL_RT,
- cpu_get_clock_locked());
- cur_icount = cpu_get_icount_locked();
-
- delta = cur_icount - cur_time;
- /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
- if (delta > 0
- && last_delta + ICOUNT_WOBBLE < delta * 2
- && timers_state.icount_time_shift > 0) {
- /* The guest is getting too far ahead. Slow time down. */
- atomic_set(&timers_state.icount_time_shift,
- timers_state.icount_time_shift - 1);
- }
- if (delta < 0
- && last_delta - ICOUNT_WOBBLE > delta * 2
- && timers_state.icount_time_shift < MAX_ICOUNT_SHIFT) {
- /* The guest is getting too far behind. Speed time up. */
- atomic_set(&timers_state.icount_time_shift,
- timers_state.icount_time_shift + 1);
- }
- last_delta = delta;
- atomic_set_i64(&timers_state.qemu_icount_bias,
- cur_icount - (timers_state.qemu_icount
- << timers_state.icount_time_shift));
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-}
-
-static void icount_adjust_rt(void *opaque)
-{
- timer_mod(timers_state.icount_rt_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000);
- icount_adjust();
-}
-
-static void icount_adjust_vm(void *opaque)
-{
- timer_mod(timers_state.icount_vm_timer,
- qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
- NANOSECONDS_PER_SECOND / 10);
- icount_adjust();
-}
-
-static int64_t qemu_icount_round(int64_t count)
-{
- int shift = atomic_read(&timers_state.icount_time_shift);
- return (count + (1 << shift) - 1) >> shift;
-}
-
-static void icount_warp_rt(void)
-{
- unsigned seq;
- int64_t warp_start;
-
- /* The icount_warp_timer is rescheduled soon after vm_clock_warp_start
- * changes from -1 to another value, so the race here is okay.
- */
- do {
- seq = seqlock_read_begin(&timers_state.vm_clock_seqlock);
- warp_start = timers_state.vm_clock_warp_start;
- } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, seq));
-
- if (warp_start == -1) {
- return;
- }
-
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- if (runstate_is_running()) {
- int64_t clock = REPLAY_CLOCK_LOCKED(REPLAY_CLOCK_VIRTUAL_RT,
- cpu_get_clock_locked());
- int64_t warp_delta;
-
- warp_delta = clock - timers_state.vm_clock_warp_start;
- if (use_icount == 2) {
- /*
- * In adaptive mode, do not let QEMU_CLOCK_VIRTUAL run too
- * far ahead of real time.
- */
- int64_t cur_icount = cpu_get_icount_locked();
- int64_t delta = clock - cur_icount;
- warp_delta = MIN(warp_delta, delta);
- }
- atomic_set_i64(&timers_state.qemu_icount_bias,
- timers_state.qemu_icount_bias + warp_delta);
- }
- timers_state.vm_clock_warp_start = -1;
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-
- if (qemu_clock_expired(QEMU_CLOCK_VIRTUAL)) {
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
- }
-}
-
-static void icount_timer_cb(void *opaque)
-{
- /* No need for a checkpoint because the timer already synchronizes
- * with CHECKPOINT_CLOCK_VIRTUAL_RT.
- */
- icount_warp_rt();
-}
-
-void qtest_clock_warp(int64_t dest)
-{
- int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- AioContext *aio_context;
- assert(qtest_enabled());
- aio_context = qemu_get_aio_context();
- while (clock < dest) {
- int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
- QEMU_TIMER_ATTR_ALL);
- int64_t warp = qemu_soonest_timeout(dest - clock, deadline);
-
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- atomic_set_i64(&timers_state.qemu_icount_bias,
- timers_state.qemu_icount_bias + warp);
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
-
- qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
- timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]);
- clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
- }
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
-}
-
-void qemu_start_warp_timer(void)
-{
- int64_t clock;
- int64_t deadline;
-
- if (!use_icount) {
- return;
- }
-
- /* Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers
- * do not fire, so computing the deadline does not make sense.
- */
- if (!runstate_is_running()) {
- return;
- }
-
- if (replay_mode != REPLAY_MODE_PLAY) {
- if (!all_cpu_threads_idle()) {
- return;
- }
-
- if (qtest_enabled()) {
- /* When testing, qtest commands advance icount. */
- return;
- }
-
- replay_checkpoint(CHECKPOINT_CLOCK_WARP_START);
- } else {
- /* warp clock deterministically in record/replay mode */
- if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_START)) {
- /* vCPU is sleeping and warp can't be started.
- It is probably a race condition: notification sent
- to vCPU was processed in advance and vCPU went to sleep.
- Therefore we have to wake it up for doing someting. */
- if (replay_has_checkpoint()) {
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
- }
- return;
- }
- }
-
- /* We want to use the earliest deadline from ALL vm_clocks */
- clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT);
- deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
- ~QEMU_TIMER_ATTR_EXTERNAL);
- if (deadline < 0) {
- static bool notified;
- if (!icount_sleep && !notified) {
- warn_report("icount sleep disabled and no active timers");
- notified = true;
- }
- return;
- }
-
- if (deadline > 0) {
- /*
- * Ensure QEMU_CLOCK_VIRTUAL proceeds even when the virtual CPU goes to
- * sleep. Otherwise, the CPU might be waiting for a future timer
- * interrupt to wake it up, but the interrupt never comes because
- * the vCPU isn't running any insns and thus doesn't advance the
- * QEMU_CLOCK_VIRTUAL.
- */
- if (!icount_sleep) {
- /*
- * We never let VCPUs sleep in no sleep icount mode.
- * If there is a pending QEMU_CLOCK_VIRTUAL timer we just advance
- * to the next QEMU_CLOCK_VIRTUAL event and notify it.
- * It is useful when we want a deterministic execution time,
- * isolated from host latencies.
- */
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- atomic_set_i64(&timers_state.qemu_icount_bias,
- timers_state.qemu_icount_bias + deadline);
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
- } else {
- /*
- * We do stop VCPUs and only advance QEMU_CLOCK_VIRTUAL after some
- * "real" time, (related to the time left until the next event) has
- * passed. The QEMU_CLOCK_VIRTUAL_RT clock will do this.
- * This avoids that the warps are visible externally; for example,
- * you will not be sending network packets continuously instead of
- * every 100ms.
- */
- seqlock_write_lock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- if (timers_state.vm_clock_warp_start == -1
- || timers_state.vm_clock_warp_start > clock) {
- timers_state.vm_clock_warp_start = clock;
- }
- seqlock_write_unlock(&timers_state.vm_clock_seqlock,
- &timers_state.vm_clock_lock);
- timer_mod_anticipate(timers_state.icount_warp_timer,
- clock + deadline);
- }
- } else if (deadline == 0) {
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
- }
-}
-
-static void qemu_account_warp_timer(void)
-{
- if (!use_icount || !icount_sleep) {
- return;
- }
-
- /* Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers
- * do not fire, so computing the deadline does not make sense.
- */
- if (!runstate_is_running()) {
- return;
- }
-
- /* warp clock deterministically in record/replay mode */
- if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_ACCOUNT)) {
- return;
- }
-
- timer_del(timers_state.icount_warp_timer);
- icount_warp_rt();
-}
-
-static bool icount_state_needed(void *opaque)
-{
- return use_icount;
-}
-
-static bool warp_timer_state_needed(void *opaque)
-{
- TimersState *s = opaque;
- return s->icount_warp_timer != NULL;
-}
-
-static bool adjust_timers_state_needed(void *opaque)
-{
- TimersState *s = opaque;
- return s->icount_rt_timer != NULL;
-}
-
-static bool shift_state_needed(void *opaque)
-{
- return use_icount == 2;
-}
-
-/*
- * Subsection for warp timer migration is optional, because may not be created
- */
-static const VMStateDescription icount_vmstate_warp_timer = {
- .name = "timer/icount/warp_timer",
- .version_id = 1,
- .minimum_version_id = 1,
- .needed = warp_timer_state_needed,
- .fields = (VMStateField[]) {
- VMSTATE_INT64(vm_clock_warp_start, TimersState),
- VMSTATE_TIMER_PTR(icount_warp_timer, TimersState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static const VMStateDescription icount_vmstate_adjust_timers = {
- .name = "timer/icount/timers",
- .version_id = 1,
- .minimum_version_id = 1,
- .needed = adjust_timers_state_needed,
- .fields = (VMStateField[]) {
- VMSTATE_TIMER_PTR(icount_rt_timer, TimersState),
- VMSTATE_TIMER_PTR(icount_vm_timer, TimersState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-static const VMStateDescription icount_vmstate_shift = {
- .name = "timer/icount/shift",
- .version_id = 1,
- .minimum_version_id = 1,
- .needed = shift_state_needed,
- .fields = (VMStateField[]) {
- VMSTATE_INT16(icount_time_shift, TimersState),
- VMSTATE_END_OF_LIST()
- }
-};
-
-/*
- * This is a subsection for icount migration.
- */
-static const VMStateDescription icount_vmstate_timers = {
- .name = "timer/icount",
- .version_id = 1,
- .minimum_version_id = 1,
- .needed = icount_state_needed,
- .fields = (VMStateField[]) {
- VMSTATE_INT64(qemu_icount_bias, TimersState),
- VMSTATE_INT64(qemu_icount, TimersState),
- VMSTATE_END_OF_LIST()
- },
- .subsections = (const VMStateDescription*[]) {
- &icount_vmstate_warp_timer,
- &icount_vmstate_adjust_timers,
- &icount_vmstate_shift,
- NULL
- }
-};
-
-static const VMStateDescription vmstate_timers = {
- .name = "timer",
- .version_id = 2,
- .minimum_version_id = 1,
- .fields = (VMStateField[]) {
- VMSTATE_INT64(cpu_ticks_offset, TimersState),
- VMSTATE_UNUSED(8),
- VMSTATE_INT64_V(cpu_clock_offset, TimersState, 2),
- VMSTATE_END_OF_LIST()
- },
- .subsections = (const VMStateDescription*[]) {
- &icount_vmstate_timers,
- NULL
- }
-};
-
-void cpu_ticks_init(void)
-{
- seqlock_init(&timers_state.vm_clock_seqlock);
- qemu_spin_init(&timers_state.vm_clock_lock);
- vmstate_register(NULL, 0, &vmstate_timers, &timers_state);
- cpu_throttle_init();
-}
-
-void configure_icount(QemuOpts *opts, Error **errp)
-{
- const char *option = qemu_opt_get(opts, "shift");
- bool sleep = qemu_opt_get_bool(opts, "sleep", true);
- bool align = qemu_opt_get_bool(opts, "align", false);
- long time_shift = -1;
-
- if (!option) {
- if (qemu_opt_get(opts, "align") != NULL) {
- error_setg(errp, "Please specify shift option when using align");
- }
- return;
- }
-
- if (align && !sleep) {
- error_setg(errp, "align=on and sleep=off are incompatible");
- return;
- }
-
- if (strcmp(option, "auto") != 0) {
- if (qemu_strtol(option, NULL, 0, &time_shift) < 0
- || time_shift < 0 || time_shift > MAX_ICOUNT_SHIFT) {
- error_setg(errp, "icount: Invalid shift value");
- return;
- }
- } else if (icount_align_option) {
- error_setg(errp, "shift=auto and align=on are incompatible");
- return;
- } else if (!icount_sleep) {
- error_setg(errp, "shift=auto and sleep=off are incompatible");
- return;
- }
-
- icount_sleep = sleep;
- if (icount_sleep) {
- timers_state.icount_warp_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
- icount_timer_cb, NULL);
- }
-
- icount_align_option = align;
-
- if (time_shift >= 0) {
- timers_state.icount_time_shift = time_shift;
- use_icount = 1;
- return;
- }
-
- use_icount = 2;
-
- /* 125MIPS seems a reasonable initial guess at the guest speed.
- It will be corrected fairly quickly anyway. */
- timers_state.icount_time_shift = 3;
-
- /* Have both realtime and virtual time triggers for speed adjustment.
- The realtime trigger catches emulated time passing too slowly,
- the virtual time trigger catches emulated time passing too fast.
- Realtime triggers occur even when idle, so use them less frequently
- than VM triggers. */
- timers_state.vm_clock_warp_start = -1;
- timers_state.icount_rt_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL_RT,
- icount_adjust_rt, NULL);
- timer_mod(timers_state.icount_rt_timer,
- qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000);
- timers_state.icount_vm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
- icount_adjust_vm, NULL);
- timer_mod(timers_state.icount_vm_timer,
- qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
- NANOSECONDS_PER_SECOND / 10);
-}
-
/***********************************************************/
/* TCG vCPU kick timer
*
@@ -854,35 +171,6 @@ static void qemu_cpu_kick_rr_cpus(void)
};
}
-static void do_nothing(CPUState *cpu, run_on_cpu_data unused)
-{
-}
-
-void qemu_timer_notify_cb(void *opaque, QEMUClockType type)
-{
- if (!use_icount || type != QEMU_CLOCK_VIRTUAL) {
- qemu_notify_event();
- return;
- }
-
- if (qemu_in_vcpu_thread()) {
- /* A CPU is currently running; kick it back out to the
- * tcg_cpu_exec() loop so it will recalculate its
- * icount deadline immediately.
- */
- qemu_cpu_kick(current_cpu);
- } else if (first_cpu) {
- /* qemu_cpu_kick is not enough to kick a halted CPU out of
- * qemu_tcg_wait_io_event. async_run_on_cpu, instead,
- * causes cpu_thread_is_idle to return false. This way,
- * handle_icount_deadline can run.
- * If we have no CPUs at all for some reason, we don't
- * need to do anything.
- */
- async_run_on_cpu(first_cpu, do_nothing, RUN_ON_CPU_NULL);
- }
-}
-
static void kick_tcg_thread(void *opaque)
{
timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick());
@@ -1272,7 +560,7 @@ static int64_t tcg_get_icount_limit(void)
deadline = INT32_MAX;
}
- return qemu_icount_round(deadline);
+ return icount_round(deadline);
} else {
return replay_get_instructions();
}
@@ -1288,7 +576,7 @@ static void notify_aio_contexts(void)
static void handle_icount_deadline(void)
{
assert(qemu_in_vcpu_thread());
- if (use_icount) {
+ if (icount_enabled()) {
int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
QEMU_TIMER_ATTR_ALL);
@@ -1300,7 +588,7 @@ static void handle_icount_deadline(void)
static void prepare_icount_for_run(CPUState *cpu)
{
- if (use_icount) {
+ if (icount_enabled()) {
int insns_left;
/* These should always be cleared by process_icount_data after
@@ -1325,9 +613,9 @@ static void prepare_icount_for_run(CPUState *cpu)
static void process_icount_data(CPUState *cpu)
{
- if (use_icount) {
+ if (icount_enabled()) {
/* Account for executed instructions */
- cpu_update_icount(cpu);
+ icount_update(cpu);
/* Reset the counters */
cpu_neg(cpu)->icount_decr.u16.low = 0;
@@ -1428,7 +716,7 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
replay_mutex_lock();
qemu_mutex_lock_iothread();
/* Account partial waits to QEMU_CLOCK_VIRTUAL. */
- qemu_account_warp_timer();
+ icount_account_warp_timer();
/* Run the timers here. This is much more efficient than
* waking up the I/O thread and waiting for completion.
@@ -1486,7 +774,7 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
atomic_mb_set(&cpu->exit_request, 0);
}
- if (use_icount && all_cpu_threads_idle()) {
+ if (icount_enabled() && all_cpu_threads_idle()) {
/*
* When all cpus are sleeping (e.g in WFI), to avoid a deadlock
* in the main_loop, wake it up in order to start the warp timer.
@@ -1639,7 +927,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
CPUState *cpu = arg;
assert(tcg_enabled());
- g_assert(!use_icount);
+ g_assert(!icount_enabled());
rcu_register_thread();
tcg_register_thread();
@@ -2218,21 +1506,3 @@ void qmp_inject_nmi(Error **errp)
nmi_monitor_handle(monitor_get_cpu_index(), errp);
}
-void dump_drift_info(void)
-{
- if (!use_icount) {
- return;
- }
-
- qemu_printf("Host - Guest clock %"PRIi64" ms\n",
- (cpu_get_clock() - cpu_get_icount())/SCALE_MS);
- if (icount_align_option) {
- qemu_printf("Max guest delay %"PRIi64" ms\n",
- -max_delay / SCALE_MS);
- qemu_printf("Max guest advance %"PRIi64" ms\n",
- max_advance / SCALE_MS);
- } else {
- qemu_printf("Max guest delay NA\n");
- qemu_printf("Max guest advance NA\n");
- }
-}
diff --git a/softmmu/icount.c b/softmmu/icount.c
new file mode 100644
index 0000000000..d4fe48c1f2
--- /dev/null
+++ b/softmmu/icount.c
@@ -0,0 +1,497 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qemu/cutils.h"
+#include "migration/vmstate.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "exec/exec-all.h"
+#include "sysemu/cpus.h"
+#include "sysemu/qtest.h"
+#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "qemu/seqlock.h"
+#include "sysemu/replay.h"
+#include "sysemu/runstate.h"
+#include "hw/core/cpu.h"
+#include "sysemu/cpu-timers.h"
+#include "sysemu/cpu-throttle.h"
+#include "timers-state.h"
+
+/*
+ * ICOUNT: Instruction Counter
+ *
+ * this module is split off from cpu-timers because the icount part
+ * is TCG-specific, and does not need to be built for other accels.
+ */
+static bool icount_sleep = true;
+/* Arbitrarily pick 1MIPS as the minimum allowable speed. */
+#define MAX_ICOUNT_SHIFT 10
+
+/*
+ * 0 = Do not count executed instructions.
+ * 1 = Fixed conversion of insn to ns via "shift" option
+ * 2 = Runtime adaptive algorithm to compute shift
+ */
+static int use_icount;
+
+int icount_enabled(void)
+{
+ return use_icount;
+}
+
+static void icount_enable_precise(void)
+{
+ use_icount = 1;
+}
+
+static void icount_enable_adaptive(void)
+{
+ use_icount = 2;
+}
+
+/*
+ * The current number of executed instructions is based on what we
+ * originally budgeted minus the current state of the decrementing
+ * icount counters in extra/u16.low.
+ */
+static int64_t icount_get_executed(CPUState *cpu)
+{
+ return (cpu->icount_budget -
+ (cpu_neg(cpu)->icount_decr.u16.low + cpu->icount_extra));
+}
+
+/*
+ * Update the global shared timer_state.qemu_icount to take into
+ * account executed instructions. This is done by the TCG vCPU
+ * thread so the main-loop can see time has moved forward.
+ */
+static void icount_update_locked(CPUState *cpu)
+{
+ int64_t executed = icount_get_executed(cpu);
+ cpu->icount_budget -= executed;
+
+ atomic_set_i64(&timers_state.qemu_icount,
+ timers_state.qemu_icount + executed);
+}
+
+/*
+ * Update the global shared timer_state.qemu_icount to take into
+ * account executed instructions. This is done by the TCG vCPU
+ * thread so the main-loop can see time has moved forward.
+ */
+void icount_update(CPUState *cpu)
+{
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ icount_update_locked(cpu);
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+}
+
+static int64_t icount_get_raw_locked(void)
+{
+ CPUState *cpu = current_cpu;
+
+ if (cpu && cpu->running) {
+ if (!cpu->can_do_io) {
+ error_report("Bad icount read");
+ exit(1);
+ }
+ /* Take into account what has run */
+ icount_update_locked(cpu);
+ }
+ /* The read is protected by the seqlock, but needs atomic64 to avoid UB */
+ return atomic_read_i64(&timers_state.qemu_icount);
+}
+
+static int64_t icount_get_locked(void)
+{
+ int64_t icount = icount_get_raw_locked();
+ return atomic_read_i64(&timers_state.qemu_icount_bias) +
+ icount_to_ns(icount);
+}
+
+int64_t icount_get_raw(void)
+{
+ int64_t icount;
+ unsigned start;
+
+ do {
+ start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
+ icount = icount_get_raw_locked();
+ } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
+
+ return icount;
+}
+
+/* Return the virtual CPU time, based on the instruction counter. */
+int64_t icount_get(void)
+{
+ int64_t icount;
+ unsigned start;
+
+ do {
+ start = seqlock_read_begin(&timers_state.vm_clock_seqlock);
+ icount = icount_get_locked();
+ } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, start));
+
+ return icount;
+}
+
+int64_t icount_to_ns(int64_t icount)
+{
+ return icount << atomic_read(&timers_state.icount_time_shift);
+}
+
+/*
+ * Correlation between real and virtual time is always going to be
+ * fairly approximate, so ignore small variation.
+ * When the guest is idle real and virtual time will be aligned in
+ * the IO wait loop.
+ */
+#define ICOUNT_WOBBLE (NANOSECONDS_PER_SECOND / 10)
+
+static void icount_adjust(void)
+{
+ int64_t cur_time;
+ int64_t cur_icount;
+ int64_t delta;
+
+ /* Protected by TimersState mutex. */
+ static int64_t last_delta;
+
+ /* If the VM is not running, then do nothing. */
+ if (!runstate_is_running()) {
+ return;
+ }
+
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ cur_time = REPLAY_CLOCK_LOCKED(REPLAY_CLOCK_VIRTUAL_RT,
+ cpu_get_clock_locked());
+ cur_icount = icount_get_locked();
+
+ delta = cur_icount - cur_time;
+ /* FIXME: This is a very crude algorithm, somewhat prone to oscillation. */
+ if (delta > 0
+ && last_delta + ICOUNT_WOBBLE < delta * 2
+ && timers_state.icount_time_shift > 0) {
+ /* The guest is getting too far ahead. Slow time down. */
+ atomic_set(&timers_state.icount_time_shift,
+ timers_state.icount_time_shift - 1);
+ }
+ if (delta < 0
+ && last_delta - ICOUNT_WOBBLE > delta * 2
+ && timers_state.icount_time_shift < MAX_ICOUNT_SHIFT) {
+ /* The guest is getting too far behind. Speed time up. */
+ atomic_set(&timers_state.icount_time_shift,
+ timers_state.icount_time_shift + 1);
+ }
+ last_delta = delta;
+ atomic_set_i64(&timers_state.qemu_icount_bias,
+ cur_icount - (timers_state.qemu_icount
+ << timers_state.icount_time_shift));
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+}
+
+static void icount_adjust_rt(void *opaque)
+{
+ timer_mod(timers_state.icount_rt_timer,
+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000);
+ icount_adjust();
+}
+
+static void icount_adjust_vm(void *opaque)
+{
+ timer_mod(timers_state.icount_vm_timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ NANOSECONDS_PER_SECOND / 10);
+ icount_adjust();
+}
+
+int64_t icount_round(int64_t count)
+{
+ int shift = atomic_read(&timers_state.icount_time_shift);
+ return (count + (1 << shift) - 1) >> shift;
+}
+
+static void icount_warp_rt(void)
+{
+ unsigned seq;
+ int64_t warp_start;
+
+ /*
+ * The icount_warp_timer is rescheduled soon after vm_clock_warp_start
+ * changes from -1 to another value, so the race here is okay.
+ */
+ do {
+ seq = seqlock_read_begin(&timers_state.vm_clock_seqlock);
+ warp_start = timers_state.vm_clock_warp_start;
+ } while (seqlock_read_retry(&timers_state.vm_clock_seqlock, seq));
+
+ if (warp_start == -1) {
+ return;
+ }
+
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ if (runstate_is_running()) {
+ int64_t clock = REPLAY_CLOCK_LOCKED(REPLAY_CLOCK_VIRTUAL_RT,
+ cpu_get_clock_locked());
+ int64_t warp_delta;
+
+ warp_delta = clock - timers_state.vm_clock_warp_start;
+ if (icount_enabled() == 2) {
+ /*
+ * In adaptive mode, do not let QEMU_CLOCK_VIRTUAL run too
+ * far ahead of real time.
+ */
+ int64_t cur_icount = icount_get_locked();
+ int64_t delta = clock - cur_icount;
+ warp_delta = MIN(warp_delta, delta);
+ }
+ atomic_set_i64(&timers_state.qemu_icount_bias,
+ timers_state.qemu_icount_bias + warp_delta);
+ }
+ timers_state.vm_clock_warp_start = -1;
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+
+ if (qemu_clock_expired(QEMU_CLOCK_VIRTUAL)) {
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+ }
+}
+
+static void icount_timer_cb(void *opaque)
+{
+ /*
+ * No need for a checkpoint because the timer already synchronizes
+ * with CHECKPOINT_CLOCK_VIRTUAL_RT.
+ */
+ icount_warp_rt();
+}
+
+void icount_start_warp_timer(void)
+{
+ int64_t clock;
+ int64_t deadline;
+
+ assert(icount_enabled());
+
+ /*
+ * Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers
+ * do not fire, so computing the deadline does not make sense.
+ */
+ if (!runstate_is_running()) {
+ return;
+ }
+
+ if (replay_mode != REPLAY_MODE_PLAY) {
+ if (!all_cpu_threads_idle()) {
+ return;
+ }
+
+ if (qtest_enabled()) {
+ /* When testing, qtest commands advance icount. */
+ return;
+ }
+
+ replay_checkpoint(CHECKPOINT_CLOCK_WARP_START);
+ } else {
+ /* warp clock deterministically in record/replay mode */
+ if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_START)) {
+ /*
+ * vCPU is sleeping and warp can't be started.
+ * It is probably a race condition: notification sent
+ * to vCPU was processed in advance and vCPU went to sleep.
+ * Therefore we have to wake it up for doing someting.
+ */
+ if (replay_has_checkpoint()) {
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+ }
+ return;
+ }
+ }
+
+ /* We want to use the earliest deadline from ALL vm_clocks */
+ clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL_RT);
+ deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
+ ~QEMU_TIMER_ATTR_EXTERNAL);
+ if (deadline < 0) {
+ static bool notified;
+ if (!icount_sleep && !notified) {
+ warn_report("icount sleep disabled and no active timers");
+ notified = true;
+ }
+ return;
+ }
+
+ if (deadline > 0) {
+ /*
+ * Ensure QEMU_CLOCK_VIRTUAL proceeds even when the virtual CPU goes to
+ * sleep. Otherwise, the CPU might be waiting for a future timer
+ * interrupt to wake it up, but the interrupt never comes because
+ * the vCPU isn't running any insns and thus doesn't advance the
+ * QEMU_CLOCK_VIRTUAL.
+ */
+ if (!icount_sleep) {
+ /*
+ * We never let VCPUs sleep in no sleep icount mode.
+ * If there is a pending QEMU_CLOCK_VIRTUAL timer we just advance
+ * to the next QEMU_CLOCK_VIRTUAL event and notify it.
+ * It is useful when we want a deterministic execution time,
+ * isolated from host latencies.
+ */
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ atomic_set_i64(&timers_state.qemu_icount_bias,
+ timers_state.qemu_icount_bias + deadline);
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+ } else {
+ /*
+ * We do stop VCPUs and only advance QEMU_CLOCK_VIRTUAL after some
+ * "real" time, (related to the time left until the next event) has
+ * passed. The QEMU_CLOCK_VIRTUAL_RT clock will do this.
+ * This avoids that the warps are visible externally; for example,
+ * you will not be sending network packets continuously instead of
+ * every 100ms.
+ */
+ seqlock_write_lock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ if (timers_state.vm_clock_warp_start == -1
+ || timers_state.vm_clock_warp_start > clock) {
+ timers_state.vm_clock_warp_start = clock;
+ }
+ seqlock_write_unlock(&timers_state.vm_clock_seqlock,
+ &timers_state.vm_clock_lock);
+ timer_mod_anticipate(timers_state.icount_warp_timer,
+ clock + deadline);
+ }
+ } else if (deadline == 0) {
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+ }
+}
+
+void icount_account_warp_timer(void)
+{
+ if (!use_icount || !icount_sleep) {
+ return;
+ }
+
+ /*
+ * Nothing to do if the VM is stopped: QEMU_CLOCK_VIRTUAL timers
+ * do not fire, so computing the deadline does not make sense.
+ */
+ if (!runstate_is_running()) {
+ return;
+ }
+
+ /* warp clock deterministically in record/replay mode */
+ if (!replay_checkpoint(CHECKPOINT_CLOCK_WARP_ACCOUNT)) {
+ return;
+ }
+
+ timer_del(timers_state.icount_warp_timer);
+ icount_warp_rt();
+}
+
+void icount_configure(QemuOpts *opts, Error **errp)
+{
+ const char *option = qemu_opt_get(opts, "shift");
+ bool sleep = qemu_opt_get_bool(opts, "sleep", true);
+ bool align = qemu_opt_get_bool(opts, "align", false);
+ long time_shift = -1;
+
+ if (!option) {
+ if (qemu_opt_get(opts, "align") != NULL) {
+ error_setg(errp, "Please specify shift option when using align");
+ }
+ return;
+ }
+
+ if (align && !sleep) {
+ error_setg(errp, "align=on and sleep=off are incompatible");
+ return;
+ }
+
+ if (strcmp(option, "auto") != 0) {
+ if (qemu_strtol(option, NULL, 0, &time_shift) < 0
+ || time_shift < 0 || time_shift > MAX_ICOUNT_SHIFT) {
+ error_setg(errp, "icount: Invalid shift value");
+ return;
+ }
+ } else if (icount_align_option) {
+ error_setg(errp, "shift=auto and align=on are incompatible");
+ return;
+ } else if (!icount_sleep) {
+ error_setg(errp, "shift=auto and sleep=off are incompatible");
+ return;
+ }
+
+ icount_sleep = sleep;
+ if (icount_sleep) {
+ timers_state.icount_warp_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
+ icount_timer_cb, NULL);
+ }
+
+ icount_align_option = align;
+
+ if (time_shift >= 0) {
+ timers_state.icount_time_shift = time_shift;
+ icount_enable_precise();
+ return;
+ }
+
+ icount_enable_adaptive();
+
+ /*
+ * 125MIPS seems a reasonable initial guess at the guest speed.
+ * It will be corrected fairly quickly anyway.
+ */
+ timers_state.icount_time_shift = 3;
+
+ /*
+ * Have both realtime and virtual time triggers for speed adjustment.
+ * The realtime trigger catches emulated time passing too slowly,
+ * the virtual time trigger catches emulated time passing too fast.
+ * Realtime triggers occur even when idle, so use them less frequently
+ * than VM triggers.
+ */
+ timers_state.vm_clock_warp_start = -1;
+ timers_state.icount_rt_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL_RT,
+ icount_adjust_rt, NULL);
+ timer_mod(timers_state.icount_rt_timer,
+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL_RT) + 1000);
+ timers_state.icount_vm_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
+ icount_adjust_vm, NULL);
+ timer_mod(timers_state.icount_vm_timer,
+ qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
+ NANOSECONDS_PER_SECOND / 10);
+}
diff --git a/softmmu/qtest.c b/softmmu/qtest.c
index 5672b75c35..737779ea7f 100644
--- a/softmmu/qtest.c
+++ b/softmmu/qtest.c
@@ -21,7 +21,7 @@
#include "exec/memory.h"
#include "hw/irq.h"
#include "sysemu/accel.h"
-#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "qemu/config-file.h"
#include "qemu/option.h"
#include "qemu/error-report.h"
@@ -273,6 +273,38 @@ static void qtest_irq_handler(void *opaque, int n, int level)
}
}
+static int64_t qtest_clock_counter;
+
+int64_t qtest_get_virtual_clock(void)
+{
+ return atomic_read_i64(&qtest_clock_counter);
+}
+
+static void qtest_set_virtual_clock(int64_t count)
+{
+ atomic_set_i64(&qtest_clock_counter, count);
+}
+
+static void qtest_clock_warp(int64_t dest)
+{
+ int64_t clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ AioContext *aio_context;
+ assert(qtest_enabled());
+ aio_context = qemu_get_aio_context();
+ while (clock < dest) {
+ int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
+ QEMU_TIMER_ATTR_ALL);
+ int64_t warp = qemu_soonest_timeout(dest - clock, deadline);
+
+ qtest_set_virtual_clock(qtest_get_virtual_clock() + warp);
+
+ qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
+ timerlist_run_timers(aio_context->tlg.tl[QEMU_CLOCK_VIRTUAL]);
+ clock = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
+ }
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+}
+
static void qtest_process_command(CharBackend *chr, gchar **words)
{
const gchar *command;
diff --git a/softmmu/timers-state.h b/softmmu/timers-state.h
new file mode 100644
index 0000000000..db4e60f18f
--- /dev/null
+++ b/softmmu/timers-state.h
@@ -0,0 +1,69 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifndef TIMERS_STATE_H
+#define TIMERS_STATE_H
+
+/* timers state, for sharing between icount and cpu-timers */
+
+typedef struct TimersState {
+ /* Protected by BQL. */
+ int64_t cpu_ticks_prev;
+ int64_t cpu_ticks_offset;
+
+ /*
+ * Protect fields that can be respectively read outside the
+ * BQL, and written from multiple threads.
+ */
+ QemuSeqLock vm_clock_seqlock;
+ QemuSpin vm_clock_lock;
+
+ int16_t cpu_ticks_enabled;
+
+ /* Conversion factor from emulated instructions to virtual clock ticks. */
+ int16_t icount_time_shift;
+
+ /* Compensate for varying guest execution speed. */
+ int64_t qemu_icount_bias;
+
+ int64_t vm_clock_warp_start;
+ int64_t cpu_clock_offset;
+
+ /* Only written by TCG thread */
+ int64_t qemu_icount;
+
+ /* for adjusting icount */
+ QEMUTimer *icount_rt_timer;
+ QEMUTimer *icount_vm_timer;
+ QEMUTimer *icount_warp_timer;
+} TimersState;
+
+extern TimersState timers_state;
+
+/*
+ * icount needs this internal from cpu-timers when adjusting the icount shift.
+ */
+int64_t cpu_get_clock_locked(void);
+
+#endif /* TIMERS_STATE_H */
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 4eb9d1f7fd..8e77df7bea 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -74,6 +74,7 @@
#include "hw/audio/soundhw.h"
#include "audio/audio.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "migration/colo.h"
#include "migration/postcopy-ram.h"
#include "sysemu/kvm.h"
@@ -2692,7 +2693,7 @@ static void user_register_global_props(void)
static int do_configure_icount(void *opaque, QemuOpts *opts, Error **errp)
{
- configure_icount(opts, errp);
+ icount_configure(opts, errp);
return 0;
}
@@ -2802,7 +2803,7 @@ static void configure_accelerators(const char *progname)
error_report("falling back to %s", ac->name);
}
- if (use_icount && !(tcg_enabled() || qtest_enabled())) {
+ if (icount_enabled() && !tcg_enabled()) {
error_report("-icount is not allowed with hardware virtualization");
exit(1);
}
@@ -4237,7 +4238,11 @@ void qemu_init(int argc, char **argv, char **envp)
semihosting_arg_fallback(kernel_filename, kernel_cmdline);
}
- cpu_ticks_init();
+ /* initialize cpu timers and VCPU throttle modules */
+ cpu_timers_init();
+
+ /* spice needs the timers to be initialized by this point */
+ qemu_spice_init();
if (default_net) {
QemuOptsList *net = qemu_find_opts("net");
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index d42046afe4..e97ad407fa 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -1,7 +1,8 @@
stub-obj-y += blk-commit-all.o
stub-obj-y += cmos.o
stub-obj-y += cpu-get-clock.o
-stub-obj-y += cpu-get-icount.o
+stub-obj-y += qemu-timer-notify-cb.o
+stub-obj-y += icount.o
stub-obj-y += dump.o
stub-obj-y += error-printf.o
stub-obj-y += fdset.o
@@ -37,7 +38,6 @@ stub-obj-y += arch_type.o
stub-obj-y += bdrv-next-monitor-owned.o
stub-obj-y += blockdev-close-all-bdrv-states.o
stub-obj-y += change-state-handler.o
-stub-obj-y += clock-warp.o
stub-obj-y += fd-register.o
stub-obj-y += fw_cfg.o
stub-obj-y += get-vm-name.o
diff --git a/stubs/clock-warp.c b/stubs/clock-warp.c
deleted file mode 100644
index b53e5dd94c..0000000000
--- a/stubs/clock-warp.c
+++ /dev/null
@@ -1,7 +0,0 @@
-#include "qemu/osdep.h"
-#include "qemu/timer.h"
-
-void qemu_start_warp_timer(void)
-{
-}
-
diff --git a/stubs/cpu-get-clock.c b/stubs/cpu-get-clock.c
index 5a92810e87..9e92404816 100644
--- a/stubs/cpu-get-clock.c
+++ b/stubs/cpu-get-clock.c
@@ -1,5 +1,6 @@
#include "qemu/osdep.h"
-#include "qemu/timer.h"
+#include "sysemu/cpu-timers.h"
+#include "qemu/main-loop.h"
int64_t cpu_get_clock(void)
{
diff --git a/stubs/cpu-get-icount.c b/stubs/cpu-get-icount.c
deleted file mode 100644
index b35f844638..0000000000
--- a/stubs/cpu-get-icount.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include "qemu/osdep.h"
-#include "qemu/timer.h"
-#include "sysemu/cpus.h"
-#include "qemu/main-loop.h"
-
-int use_icount;
-
-int64_t cpu_get_icount(void)
-{
- abort();
-}
-
-int64_t cpu_get_icount_raw(void)
-{
- abort();
-}
-
-void qemu_timer_notify_cb(void *opaque, QEMUClockType type)
-{
- qemu_notify_event();
-}
diff --git a/stubs/icount.c b/stubs/icount.c
new file mode 100644
index 0000000000..3b35001051
--- /dev/null
+++ b/stubs/icount.c
@@ -0,0 +1,52 @@
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "sysemu/cpu-timers.h"
+
+/* icount - Instruction Counter API */
+
+/*
+ * Return the icount enablement state:
+ *
+ * 0 = Disabled - Do not count executed instructions.
+ */
+int icount_enabled(void)
+{
+ return 0;
+}
+void icount_update(CPUState *cpu)
+{
+ abort();
+}
+void icount_configure(QemuOpts *opts, Error **errp)
+{
+ /* signal error */
+ error_setg(errp, "cannot configure icount, TCG support not available");
+}
+int64_t icount_get_raw(void)
+{
+ abort();
+ return 0;
+}
+int64_t icount_get(void)
+{
+ abort();
+ return 0;
+}
+int64_t icount_to_ns(int64_t icount)
+{
+ abort();
+ return 0;
+}
+int64_t icount_round(int64_t count)
+{
+ abort();
+ return 0;
+}
+void icount_start_warp_timer(void)
+{
+ abort();
+}
+void icount_account_warp_timer(void)
+{
+ abort();
+}
diff --git a/stubs/qemu-timer-notify-cb.c b/stubs/qemu-timer-notify-cb.c
new file mode 100644
index 0000000000..845e46f8e0
--- /dev/null
+++ b/stubs/qemu-timer-notify-cb.c
@@ -0,0 +1,8 @@
+#include "qemu/osdep.h"
+#include "sysemu/cpu-timers.h"
+#include "qemu/main-loop.h"
+
+void qemu_timer_notify_cb(void *opaque, QEMUClockType type)
+{
+ qemu_notify_event();
+}
diff --git a/stubs/qtest.c b/stubs/qtest.c
index 891eb954fb..4666a49d7d 100644
--- a/stubs/qtest.c
+++ b/stubs/qtest.c
@@ -18,3 +18,8 @@ bool qtest_driver(void)
{
return false;
}
+
+int64_t qtest_get_virtual_clock(void)
+{
+ return 0;
+}
diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index 8870284f57..36be602179 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -20,6 +20,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "disas/disas.h"
#include "qemu/host-utils.h"
#include "exec/exec-all.h"
@@ -1329,7 +1330,7 @@ static DisasJumpType gen_mfpr(DisasContext *ctx, TCGv va, int regno)
case 249: /* VMTIME */
helper = gen_helper_get_vmtime;
do_helper:
- if (use_icount) {
+ if (icount_enabled()) {
gen_io_start();
helper(va);
return DISAS_PC_STALE;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 455c92b891..b04f4f9127 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -24,6 +24,7 @@
#include "hw/irq.h"
#include "hw/semihosting/semihost.h"
#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/kvm.h"
#include "sysemu/tcg.h"
#include "qemu/range.h"
@@ -1206,17 +1207,17 @@ static int64_t cycles_ns_per(uint64_t cycles)
static bool instructions_supported(CPUARMState *env)
{
- return use_icount == 1 /* Precise instruction counting */;
+ return icount_enabled() == 1; /* Precise instruction counting */
}
static uint64_t instructions_get_count(CPUARMState *env)
{
- return (uint64_t)cpu_get_icount_raw();
+ return (uint64_t)icount_get_raw();
}
static int64_t instructions_ns_per(uint64_t icount)
{
- return cpu_icount_to_ns((int64_t)icount);
+ return icount_to_ns((int64_t)icount);
}
#endif
diff --git a/target/riscv/csr.c b/target/riscv/csr.c
index 6a96a01b1c..ab2b230991 100644
--- a/target/riscv/csr.c
+++ b/target/riscv/csr.c
@@ -242,8 +242,8 @@ static int write_vstart(CPURISCVState *env, int csrno, target_ulong val)
static int read_instret(CPURISCVState *env, int csrno, target_ulong *val)
{
#if !defined(CONFIG_USER_ONLY)
- if (use_icount) {
- *val = cpu_get_icount();
+ if (icount_enabled()) {
+ *val = icount_get();
} else {
*val = cpu_get_host_ticks();
}
@@ -257,8 +257,8 @@ static int read_instret(CPURISCVState *env, int csrno, target_ulong *val)
static int read_instreth(CPURISCVState *env, int csrno, target_ulong *val)
{
#if !defined(CONFIG_USER_ONLY)
- if (use_icount) {
- *val = cpu_get_icount() >> 32;
+ if (icount_enabled()) {
+ *val = icount_get() >> 32;
} else {
*val = cpu_get_host_ticks() >> 32;
}
diff --git a/tests/ptimer-test-stubs.c b/tests/ptimer-test-stubs.c
index ed393d9082..b4447a3e44 100644
--- a/tests/ptimer-test-stubs.c
+++ b/tests/ptimer-test-stubs.c
@@ -12,6 +12,7 @@
#include "qemu/main-loop.h"
#include "sysemu/replay.h"
#include "migration/vmstate.h"
+#include "sysemu/cpu-timers.h"
#include "ptimer-test.h"
@@ -30,8 +31,10 @@ QEMUTimerListGroup main_loop_tlg;
int64_t ptimer_test_time_ns;
-/* Do not artificially limit period - see hw/core/ptimer.c. */
-int use_icount = 1;
+int icount_enabled(void)
+{
+ return 0;
+}
bool qtest_allowed;
void timer_init_full(QEMUTimer *ts,
diff --git a/tests/test-timed-average.c b/tests/test-timed-average.c
index e2bcf5fe13..82c92500df 100644
--- a/tests/test-timed-average.c
+++ b/tests/test-timed-average.c
@@ -11,7 +11,7 @@
*/
#include "qemu/osdep.h"
-
+#include "sysemu/cpu-timers.h"
#include "qemu/timed-average.h"
/* This is the clock for QEMU_CLOCK_VIRTUAL */
diff --git a/util/main-loop.c b/util/main-loop.c
index f69f055013..744b42fc54 100644
--- a/util/main-loop.c
+++ b/util/main-loop.c
@@ -27,7 +27,7 @@
#include "qemu/cutils.h"
#include "qemu/timer.h"
#include "sysemu/qtest.h"
-#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/replay.h"
#include "qemu/main-loop.h"
#include "block/aio.h"
@@ -517,9 +517,13 @@ void main_loop_wait(int nonblocking)
mlpoll.state = ret < 0 ? MAIN_LOOP_POLL_ERR : MAIN_LOOP_POLL_OK;
notifier_list_notify(&main_loop_poll_notifiers, &mlpoll);
- /* CPU thread can infinitely wait for event after
- missing the warp */
- qemu_start_warp_timer();
+ if (icount_enabled()) {
+ /*
+ * CPU thread can infinitely wait for event after
+ * missing the warp
+ */
+ icount_start_warp_timer();
+ }
qemu_clock_run_all_timers();
}
diff --git a/util/qemu-timer.c b/util/qemu-timer.c
index f62b4feecd..db51e68f25 100644
--- a/util/qemu-timer.c
+++ b/util/qemu-timer.c
@@ -26,8 +26,10 @@
#include "qemu/main-loop.h"
#include "qemu/timer.h"
#include "qemu/lockable.h"
+#include "sysemu/cpu-timers.h"
#include "sysemu/replay.h"
#include "sysemu/cpus.h"
+#include "sysemu/qtest.h"
#ifdef CONFIG_POSIX
#include <pthread.h>
@@ -134,7 +136,7 @@ static void qemu_clock_init(QEMUClockType type, QEMUTimerListNotifyCB *notify_cb
bool qemu_clock_use_for_deadline(QEMUClockType type)
{
- return !(use_icount && (type == QEMU_CLOCK_VIRTUAL));
+ return !(icount_enabled() && (type == QEMU_CLOCK_VIRTUAL));
}
void qemu_clock_notify(QEMUClockType type)
@@ -416,8 +418,8 @@ static bool timer_mod_ns_locked(QEMUTimerList *timer_list,
static void timerlist_rearm(QEMUTimerList *timer_list)
{
/* Interrupt execution to force deadline recalculation. */
- if (timer_list->clock->type == QEMU_CLOCK_VIRTUAL) {
- qemu_start_warp_timer();
+ if (icount_enabled() && timer_list->clock->type == QEMU_CLOCK_VIRTUAL) {
+ icount_start_warp_timer();
}
timerlist_notify(timer_list);
}
@@ -633,8 +635,10 @@ int64_t qemu_clock_get_ns(QEMUClockType type)
return get_clock();
default:
case QEMU_CLOCK_VIRTUAL:
- if (use_icount) {
- return cpu_get_icount();
+ if (icount_enabled()) {
+ return icount_get();
+ } else if (qtest_enabled()) { /* for qtest_clock_warp */
+ return qtest_get_virtual_clock();
} else {
return cpu_get_clock();
}
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 01/14] cpu-timers, icount: new modules Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:28 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg Claudio Fontana
` (12 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
The new interface starts unused, will start being used by the
next patches.
It provides methods for each accelerator to start a vcpu, kick a vcpu,
synchronize state, get cpu virtual clock and elapsed ticks.
In qemu_wait_io_event, make it clear that APC is used only for HAX
on Windows.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
hw/core/cpu.c | 1 +
hw/i386/x86.c | 2 +-
include/sysemu/cpu-timers.h | 9 +-
include/sysemu/cpus.h | 36 ++++++++
include/sysemu/hw_accel.h | 69 ++-------------
softmmu/cpu-timers.c | 9 +-
softmmu/cpus.c | 195 ++++++++++++++++++++++++++++++++---------
stubs/Makefile.objs | 2 +
stubs/cpu-synchronize-state.c | 15 ++++
stubs/cpus-get-virtual-clock.c | 8 ++
util/qemu-timer.c | 8 +-
11 files changed, 231 insertions(+), 123 deletions(-)
create mode 100644 stubs/cpu-synchronize-state.c
create mode 100644 stubs/cpus-get-virtual-clock.c
diff --git a/hw/core/cpu.c b/hw/core/cpu.c
index 594441a150..b389a312df 100644
--- a/hw/core/cpu.c
+++ b/hw/core/cpu.c
@@ -33,6 +33,7 @@
#include "hw/qdev-properties.h"
#include "trace-root.h"
#include "qemu/plugin.h"
+#include "sysemu/hw_accel.h"
CPUInterruptHandler cpu_interrupt_handler;
diff --git a/hw/i386/x86.c b/hw/i386/x86.c
index 58cf2229d5..00c35bad7e 100644
--- a/hw/i386/x86.c
+++ b/hw/i386/x86.c
@@ -264,7 +264,7 @@ static long get_file_size(FILE *f)
/* TSC handling */
uint64_t cpu_get_tsc(CPUX86State *env)
{
- return cpu_get_ticks();
+ return cpus_get_elapsed_ticks();
}
/* IRQ handling */
diff --git a/include/sysemu/cpu-timers.h b/include/sysemu/cpu-timers.h
index 07d724672f..cb83cc5584 100644
--- a/include/sysemu/cpu-timers.h
+++ b/include/sysemu/cpu-timers.h
@@ -64,9 +64,8 @@ void cpu_enable_ticks(void);
void cpu_disable_ticks(void);
/*
- * return the time elapsed in VM between vm_start and vm_stop. Unless
- * icount is active, cpu_get_ticks() uses units of the host CPU cycle
- * counter.
+ * return the time elapsed in VM between vm_start and vm_stop.
+ * cpu_get_ticks() uses units of the host CPU cycle counter.
*/
int64_t cpu_get_ticks(void);
@@ -78,4 +77,8 @@ int64_t cpu_get_clock(void);
void qemu_timer_notify_cb(void *opaque, QEMUClockType type);
+/* get the VIRTUAL clock and VM elapsed ticks via the cpus accel interface */
+int64_t cpus_get_virtual_clock(void);
+int64_t cpus_get_elapsed_ticks(void);
+
#endif /* SYSEMU_CPU_TIMERS_H */
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index 149de000a0..db196dd96f 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -4,7 +4,43 @@
#include "qemu/timer.h"
/* cpus.c */
+
+/* CPU execution threads */
+
+typedef struct CpusAccel {
+ void (*create_vcpu_thread)(CPUState *cpu); /* MANDATORY */
+ void (*kick_vcpu_thread)(CPUState *cpu);
+
+ void (*synchronize_post_reset)(CPUState *cpu);
+ void (*synchronize_post_init)(CPUState *cpu);
+ void (*synchronize_state)(CPUState *cpu);
+ void (*synchronize_pre_loadvm)(CPUState *cpu);
+
+ int64_t (*get_virtual_clock)(void);
+ int64_t (*get_elapsed_ticks)(void);
+} CpusAccel;
+
+/* register accel-specific cpus interface implementation */
+void cpus_register_accel(CpusAccel *i);
+
+/* interface available for cpus accelerator threads */
+
+/* For temporary buffers for forming a name */
+#define VCPU_THREAD_NAME_SIZE 16
+
+void cpus_kick_thread(CPUState *cpu);
+bool cpu_work_list_empty(CPUState *cpu);
+bool cpu_thread_is_idle(CPUState *cpu);
bool all_cpu_threads_idle(void);
+bool cpu_can_run(CPUState *cpu);
+void qemu_wait_io_event_common(CPUState *cpu);
+void qemu_wait_io_event(CPUState *cpu);
+void cpu_thread_signal_created(CPUState *cpu);
+void cpu_thread_signal_destroyed(CPUState *cpu);
+void cpu_handle_guest_debug(CPUState *cpu);
+
+/* end interface for cpus accelerator threads */
+
bool qemu_in_vcpu_thread(void);
void qemu_init_cpu_loop(void);
void resume_all_vcpus(void);
diff --git a/include/sysemu/hw_accel.h b/include/sysemu/hw_accel.h
index e128f8b06b..ffed6192a3 100644
--- a/include/sysemu/hw_accel.h
+++ b/include/sysemu/hw_accel.h
@@ -1,5 +1,5 @@
/*
- * QEMU Hardware accelertors support
+ * QEMU Hardware accelerators support
*
* Copyright 2016 Google, Inc.
*
@@ -17,68 +17,9 @@
#include "sysemu/hvf.h"
#include "sysemu/whpx.h"
-static inline void cpu_synchronize_state(CPUState *cpu)
-{
- if (kvm_enabled()) {
- kvm_cpu_synchronize_state(cpu);
- }
- if (hax_enabled()) {
- hax_cpu_synchronize_state(cpu);
- }
- if (hvf_enabled()) {
- hvf_cpu_synchronize_state(cpu);
- }
- if (whpx_enabled()) {
- whpx_cpu_synchronize_state(cpu);
- }
-}
-
-static inline void cpu_synchronize_post_reset(CPUState *cpu)
-{
- if (kvm_enabled()) {
- kvm_cpu_synchronize_post_reset(cpu);
- }
- if (hax_enabled()) {
- hax_cpu_synchronize_post_reset(cpu);
- }
- if (hvf_enabled()) {
- hvf_cpu_synchronize_post_reset(cpu);
- }
- if (whpx_enabled()) {
- whpx_cpu_synchronize_post_reset(cpu);
- }
-}
-
-static inline void cpu_synchronize_post_init(CPUState *cpu)
-{
- if (kvm_enabled()) {
- kvm_cpu_synchronize_post_init(cpu);
- }
- if (hax_enabled()) {
- hax_cpu_synchronize_post_init(cpu);
- }
- if (hvf_enabled()) {
- hvf_cpu_synchronize_post_init(cpu);
- }
- if (whpx_enabled()) {
- whpx_cpu_synchronize_post_init(cpu);
- }
-}
-
-static inline void cpu_synchronize_pre_loadvm(CPUState *cpu)
-{
- if (kvm_enabled()) {
- kvm_cpu_synchronize_pre_loadvm(cpu);
- }
- if (hax_enabled()) {
- hax_cpu_synchronize_pre_loadvm(cpu);
- }
- if (hvf_enabled()) {
- hvf_cpu_synchronize_pre_loadvm(cpu);
- }
- if (whpx_enabled()) {
- whpx_cpu_synchronize_pre_loadvm(cpu);
- }
-}
+void cpu_synchronize_state(CPUState *cpu);
+void cpu_synchronize_post_reset(CPUState *cpu);
+void cpu_synchronize_post_init(CPUState *cpu);
+void cpu_synchronize_pre_loadvm(CPUState *cpu);
#endif /* QEMU_HW_ACCEL_H */
diff --git a/softmmu/cpu-timers.c b/softmmu/cpu-timers.c
index 64addb315d..3e1da79735 100644
--- a/softmmu/cpu-timers.c
+++ b/softmmu/cpu-timers.c
@@ -61,18 +61,13 @@ static int64_t cpu_get_ticks_locked(void)
}
/*
- * return the time elapsed in VM between vm_start and vm_stop. Unless
- * icount is active, cpu_get_ticks() uses units of the host CPU cycle
- * counter.
+ * return the time elapsed in VM between vm_start and vm_stop.
+ * cpu_get_ticks() uses units of the host CPU cycle counter.
*/
int64_t cpu_get_ticks(void)
{
int64_t ticks;
- if (icount_enabled()) {
- return icount_get();
- }
-
qemu_spin_lock(&timers_state.vm_clock_lock);
ticks = cpu_get_ticks_locked();
qemu_spin_unlock(&timers_state.vm_clock_lock);
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 54fdb2761c..2b15b5f86b 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -87,7 +87,7 @@ bool cpu_is_stopped(CPUState *cpu)
return cpu->stopped || !runstate_is_running();
}
-static inline bool cpu_work_list_empty(CPUState *cpu)
+bool cpu_work_list_empty(CPUState *cpu)
{
bool ret;
@@ -97,7 +97,7 @@ static inline bool cpu_work_list_empty(CPUState *cpu)
return ret;
}
-static bool cpu_thread_is_idle(CPUState *cpu)
+bool cpu_thread_is_idle(CPUState *cpu)
{
if (cpu->stop || !cpu_work_list_empty(cpu)) {
return false;
@@ -215,6 +215,11 @@ void hw_error(const char *fmt, ...)
abort();
}
+/*
+ * The chosen accelerator is supposed to register this.
+ */
+static CpusAccel *cpus_accel;
+
void cpu_synchronize_all_states(void)
{
CPUState *cpu;
@@ -251,6 +256,102 @@ void cpu_synchronize_all_pre_loadvm(void)
}
}
+void cpu_synchronize_state(CPUState *cpu)
+{
+ if (cpus_accel && cpus_accel->synchronize_state) {
+ cpus_accel->synchronize_state(cpu);
+ }
+ if (kvm_enabled()) {
+ kvm_cpu_synchronize_state(cpu);
+ }
+ if (hax_enabled()) {
+ hax_cpu_synchronize_state(cpu);
+ }
+ if (whpx_enabled()) {
+ whpx_cpu_synchronize_state(cpu);
+ }
+}
+
+void cpu_synchronize_post_reset(CPUState *cpu)
+{
+ if (cpus_accel && cpus_accel->synchronize_post_reset) {
+ cpus_accel->synchronize_post_reset(cpu);
+ }
+ if (kvm_enabled()) {
+ kvm_cpu_synchronize_post_reset(cpu);
+ }
+ if (hax_enabled()) {
+ hax_cpu_synchronize_post_reset(cpu);
+ }
+ if (whpx_enabled()) {
+ whpx_cpu_synchronize_post_reset(cpu);
+ }
+}
+
+void cpu_synchronize_post_init(CPUState *cpu)
+{
+ if (cpus_accel && cpus_accel->synchronize_post_init) {
+ cpus_accel->synchronize_post_init(cpu);
+ }
+ if (kvm_enabled()) {
+ kvm_cpu_synchronize_post_init(cpu);
+ }
+ if (hax_enabled()) {
+ hax_cpu_synchronize_post_init(cpu);
+ }
+ if (whpx_enabled()) {
+ whpx_cpu_synchronize_post_init(cpu);
+ }
+}
+
+void cpu_synchronize_pre_loadvm(CPUState *cpu)
+{
+ if (cpus_accel && cpus_accel->synchronize_pre_loadvm) {
+ cpus_accel->synchronize_pre_loadvm(cpu);
+ }
+ if (kvm_enabled()) {
+ kvm_cpu_synchronize_pre_loadvm(cpu);
+ }
+ if (hax_enabled()) {
+ hax_cpu_synchronize_pre_loadvm(cpu);
+ }
+ if (hvf_enabled()) {
+ hvf_cpu_synchronize_pre_loadvm(cpu);
+ }
+ if (whpx_enabled()) {
+ whpx_cpu_synchronize_pre_loadvm(cpu);
+ }
+}
+
+int64_t cpus_get_virtual_clock(void)
+{
+ if (cpus_accel && cpus_accel->get_virtual_clock) {
+ return cpus_accel->get_virtual_clock();
+ }
+ if (icount_enabled()) {
+ return icount_get();
+ } else if (qtest_enabled()) { /* for qtest_clock_warp */
+ return qtest_get_virtual_clock();
+ }
+ return cpu_get_clock();
+}
+
+/*
+ * return the time elapsed in VM between vm_start and vm_stop. Unless
+ * icount is active, cpus_get_elapsed_ticks() uses units of the host CPU cycle
+ * counter.
+ */
+int64_t cpus_get_elapsed_ticks(void)
+{
+ if (cpus_accel && cpus_accel->get_elapsed_ticks) {
+ return cpus_accel->get_elapsed_ticks();
+ }
+ if (icount_enabled()) {
+ return icount_get();
+ }
+ return cpu_get_ticks();
+}
+
static int do_vm_stop(RunState state, bool send_stop)
{
int ret = 0;
@@ -279,7 +380,7 @@ int vm_shutdown(void)
return do_vm_stop(RUN_STATE_SHUTDOWN, false);
}
-static bool cpu_can_run(CPUState *cpu)
+bool cpu_can_run(CPUState *cpu)
{
if (cpu->stop) {
return false;
@@ -290,7 +391,7 @@ static bool cpu_can_run(CPUState *cpu)
return true;
}
-static void cpu_handle_guest_debug(CPUState *cpu)
+void cpu_handle_guest_debug(CPUState *cpu)
{
gdb_set_stop_cpu(cpu);
qemu_system_debug_request();
@@ -396,7 +497,7 @@ static void qemu_cpu_stop(CPUState *cpu, bool exit)
qemu_cond_broadcast(&qemu_pause_cond);
}
-static void qemu_wait_io_event_common(CPUState *cpu)
+void qemu_wait_io_event_common(CPUState *cpu)
{
atomic_mb_set(&cpu->thread_kicked, false);
if (cpu->stop) {
@@ -421,7 +522,7 @@ static void qemu_tcg_rr_wait_io_event(void)
}
}
-static void qemu_wait_io_event(CPUState *cpu)
+void qemu_wait_io_event(CPUState *cpu)
{
bool slept = false;
@@ -437,8 +538,8 @@ static void qemu_wait_io_event(CPUState *cpu)
}
#ifdef _WIN32
- /* Eat dummy APC queued by qemu_cpu_kick_thread. */
- if (!tcg_enabled()) {
+ /* Eat dummy APC queued by cpus_kick_thread. */
+ if (hax_enabled()) {
SleepEx(0, TRUE);
}
#endif
@@ -467,8 +568,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
kvm_init_cpu_signals(cpu);
/* signal CPU creation */
- cpu->created = true;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
@@ -482,8 +582,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
} while (!cpu->unplug || cpu_can_run(cpu));
qemu_kvm_destroy_vcpu(cpu);
- cpu->created = false;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_destroyed(cpu);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL;
@@ -511,8 +610,7 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
sigaddset(&waitset, SIG_IPI);
/* signal CPU creation */
- cpu->created = true;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
@@ -660,8 +758,7 @@ static void deal_with_unplugged_cpus(void)
CPU_FOREACH(cpu) {
if (cpu->unplug && !cpu_can_run(cpu)) {
qemu_tcg_destroy_vcpu(cpu);
- cpu->created = false;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_destroyed(cpu);
break;
}
}
@@ -688,9 +785,8 @@ static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
qemu_thread_get_self(cpu->thread);
cpu->thread_id = qemu_get_thread_id();
- cpu->created = true;
cpu->can_do_io = 1;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
/* wait for initial kick-off after machine start */
@@ -800,11 +896,9 @@ static void *qemu_hax_cpu_thread_fn(void *arg)
qemu_thread_get_self(cpu->thread);
cpu->thread_id = qemu_get_thread_id();
- cpu->created = true;
current_cpu = cpu;
-
hax_init_vcpu(cpu);
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
@@ -843,8 +937,7 @@ static void *qemu_hvf_cpu_thread_fn(void *arg)
hvf_init_vcpu(cpu);
/* signal CPU creation */
- cpu->created = true;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
@@ -858,8 +951,7 @@ static void *qemu_hvf_cpu_thread_fn(void *arg)
} while (!cpu->unplug || cpu_can_run(cpu));
hvf_vcpu_destroy(cpu);
- cpu->created = false;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_destroyed(cpu);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL;
@@ -884,8 +976,7 @@ static void *qemu_whpx_cpu_thread_fn(void *arg)
}
/* signal CPU creation */
- cpu->created = true;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
do {
@@ -902,8 +993,7 @@ static void *qemu_whpx_cpu_thread_fn(void *arg)
} while (!cpu->unplug || cpu_can_run(cpu));
whpx_destroy_vcpu(cpu);
- cpu->created = false;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_destroyed(cpu);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL;
@@ -936,10 +1026,9 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
qemu_thread_get_self(cpu->thread);
cpu->thread_id = qemu_get_thread_id();
- cpu->created = true;
cpu->can_do_io = 1;
current_cpu = cpu;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_created(cpu);
qemu_guest_random_seed_thread_part2(cpu->random_seed);
/* process any pending work */
@@ -980,14 +1069,13 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
} while (!cpu->unplug || cpu_can_run(cpu));
qemu_tcg_destroy_vcpu(cpu);
- cpu->created = false;
- qemu_cond_signal(&qemu_cpu_cond);
+ cpu_thread_signal_destroyed(cpu);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL;
}
-static void qemu_cpu_kick_thread(CPUState *cpu)
+void cpus_kick_thread(CPUState *cpu)
{
#ifndef _WIN32
int err;
@@ -1017,7 +1105,10 @@ static void qemu_cpu_kick_thread(CPUState *cpu)
void qemu_cpu_kick(CPUState *cpu)
{
qemu_cond_broadcast(cpu->halt_cond);
- if (tcg_enabled()) {
+
+ if (cpus_accel && cpus_accel->kick_vcpu_thread) {
+ cpus_accel->kick_vcpu_thread(cpu);
+ } else if (tcg_enabled()) {
if (qemu_tcg_mttcg_enabled()) {
cpu_exit(cpu);
} else {
@@ -1031,14 +1122,14 @@ void qemu_cpu_kick(CPUState *cpu)
*/
cpu->exit_request = 1;
}
- qemu_cpu_kick_thread(cpu);
+ cpus_kick_thread(cpu);
}
}
void qemu_cpu_kick_self(void)
{
assert(current_cpu);
- qemu_cpu_kick_thread(current_cpu);
+ cpus_kick_thread(current_cpu);
}
bool qemu_cpu_is_self(CPUState *cpu)
@@ -1088,6 +1179,21 @@ void qemu_cond_timedwait_iothread(QemuCond *cond, int ms)
qemu_cond_timedwait(cond, &qemu_global_mutex, ms);
}
+/* signal CPU creation */
+void cpu_thread_signal_created(CPUState *cpu)
+{
+ cpu->created = true;
+ qemu_cond_signal(&qemu_cpu_cond);
+}
+
+/* signal CPU destruction */
+void cpu_thread_signal_destroyed(CPUState *cpu)
+{
+ cpu->created = false;
+ qemu_cond_signal(&qemu_cpu_cond);
+}
+
+
static bool all_vcpus_paused(void)
{
CPUState *cpu;
@@ -1163,9 +1269,6 @@ void cpu_remove_sync(CPUState *cpu)
qemu_mutex_lock_iothread();
}
-/* For temporary buffers for forming a name */
-#define VCPU_THREAD_NAME_SIZE 16
-
static void qemu_tcg_init_vcpu(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
@@ -1286,6 +1389,13 @@ static void qemu_whpx_start_vcpu(CPUState *cpu)
#endif
}
+void cpus_register_accel(CpusAccel *ca)
+{
+ assert(ca != NULL);
+ assert(ca->create_vcpu_thread != NULL); /* mandatory */
+ cpus_accel = ca;
+}
+
static void qemu_dummy_start_vcpu(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
@@ -1316,7 +1426,10 @@ void qemu_init_vcpu(CPUState *cpu)
cpu_address_space_init(cpu, 0, "cpu-memory", cpu->memory);
}
- if (kvm_enabled()) {
+ if (cpus_accel) {
+ /* accelerator already implements the CpusAccel interface */
+ cpus_accel->create_vcpu_thread(cpu);
+ } else if (kvm_enabled()) {
qemu_kvm_start_vcpu(cpu);
} else if (hax_enabled()) {
qemu_hax_start_vcpu(cpu);
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index e97ad407fa..16345eec43 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -1,6 +1,7 @@
stub-obj-y += blk-commit-all.o
stub-obj-y += cmos.o
stub-obj-y += cpu-get-clock.o
+stub-obj-y += cpus-get-virtual-clock.o
stub-obj-y += qemu-timer-notify-cb.o
stub-obj-y += icount.o
stub-obj-y += dump.o
@@ -28,6 +29,7 @@ stub-obj-y += trace-control.o
stub-obj-y += vmgenid.o
stub-obj-y += vmstate.o
stub-obj-$(CONFIG_SOFTMMU) += win32-kbd-hook.o
+stub-obj-y += cpu-synchronize-state.o
#######################################################################
# code used by both qemu system emulation and qemu-img
diff --git a/stubs/cpu-synchronize-state.c b/stubs/cpu-synchronize-state.c
new file mode 100644
index 0000000000..3112fe439d
--- /dev/null
+++ b/stubs/cpu-synchronize-state.c
@@ -0,0 +1,15 @@
+#include "qemu/osdep.h"
+#include "sysemu/hw_accel.h"
+
+void cpu_synchronize_state(CPUState *cpu)
+{
+}
+void cpu_synchronize_post_reset(CPUState *cpu)
+{
+}
+void cpu_synchronize_post_init(CPUState *cpu)
+{
+}
+void cpu_synchronize_pre_loadvm(CPUState *cpu)
+{
+}
diff --git a/stubs/cpus-get-virtual-clock.c b/stubs/cpus-get-virtual-clock.c
new file mode 100644
index 0000000000..fd447d53f3
--- /dev/null
+++ b/stubs/cpus-get-virtual-clock.c
@@ -0,0 +1,8 @@
+#include "qemu/osdep.h"
+#include "sysemu/cpu-timers.h"
+#include "qemu/main-loop.h"
+
+int64_t cpus_get_virtual_clock(void)
+{
+ return cpu_get_clock();
+}
diff --git a/util/qemu-timer.c b/util/qemu-timer.c
index db51e68f25..50b325c65b 100644
--- a/util/qemu-timer.c
+++ b/util/qemu-timer.c
@@ -635,13 +635,7 @@ int64_t qemu_clock_get_ns(QEMUClockType type)
return get_clock();
default:
case QEMU_CLOCK_VIRTUAL:
- if (icount_enabled()) {
- return icount_get();
- } else if (qtest_enabled()) { /* for qtest_clock_warp */
- return qtest_get_virtual_clock();
- } else {
- return cpu_get_clock();
- }
+ return cpus_get_virtual_clock();
case QEMU_CLOCK_HOST:
return REPLAY_CLOCK(REPLAY_CLOCK_HOST, get_clock_realtime());
case QEMU_CLOCK_VIRTUAL_RT:
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 01/14] cpu-timers, icount: new modules Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:39 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest Claudio Fontana
` (11 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
TCG is the first accelerator to register a "CpusAccel" interface
on initialization, providing functions for starting a vcpu,
kicking a vcpu, sychronizing state and getting virtual clock
and ticks.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
accel/tcg/Makefile.objs | 1 +
accel/tcg/tcg-all.c | 12 +-
accel/tcg/tcg-cpus.c | 541 ++++++++++++++++++++++++++++++++++++++++++++++++
accel/tcg/tcg-cpus.h | 17 ++
softmmu/cpus.c | 496 +-------------------------------------------
5 files changed, 567 insertions(+), 500 deletions(-)
create mode 100644 accel/tcg/tcg-cpus.c
create mode 100644 accel/tcg/tcg-cpus.h
diff --git a/accel/tcg/Makefile.objs b/accel/tcg/Makefile.objs
index a92f2c454b..ecf9aa582e 100644
--- a/accel/tcg/Makefile.objs
+++ b/accel/tcg/Makefile.objs
@@ -1,5 +1,6 @@
obj-$(CONFIG_SOFTMMU) += tcg-all.o
obj-$(CONFIG_SOFTMMU) += cputlb.o
+obj-$(CONFIG_SOFTMMU) += tcg-cpus.o
obj-y += tcg-runtime.o tcg-runtime-gvec.o
obj-y += cpu-exec.o cpu-exec-common.o translate-all.o
obj-y += translator.o
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index f1feea20c8..01957b130d 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -24,19 +24,17 @@
*/
#include "qemu/osdep.h"
-#include "sysemu/accel.h"
+#include "qemu-common.h"
#include "sysemu/tcg.h"
-#include "qom/object.h"
-#include "cpu.h"
-#include "sysemu/cpus.h"
#include "sysemu/cpu-timers.h"
-#include "qemu/main-loop.h"
#include "tcg/tcg.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/boards.h"
#include "qapi/qapi-builtin-visit.h"
+#include "tcg-cpus.h"
+
typedef struct TCGState {
AccelState parent_obj;
@@ -123,6 +121,8 @@ static void tcg_accel_instance_init(Object *obj)
s->mttcg_enabled = default_mttcg_enabled();
}
+bool mttcg_enabled;
+
static int tcg_init(MachineState *ms)
{
TCGState *s = TCG_STATE(current_accel());
@@ -130,6 +130,8 @@ static int tcg_init(MachineState *ms)
tcg_exec_init(s->tb_size * 1024 * 1024);
cpu_interrupt_handler = tcg_handle_interrupt;
mttcg_enabled = s->mttcg_enabled;
+ cpus_register_accel(&tcg_cpus);
+
return 0;
}
diff --git a/accel/tcg/tcg-cpus.c b/accel/tcg/tcg-cpus.c
new file mode 100644
index 0000000000..c82d142523
--- /dev/null
+++ b/accel/tcg/tcg-cpus.c
@@ -0,0 +1,541 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ * Copyright (c) 2014 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "sysemu/tcg.h"
+#include "sysemu/replay.h"
+#include "qemu/main-loop.h"
+#include "qemu/guest-random.h"
+#include "exec/exec-all.h"
+
+#include "tcg-cpus.h"
+
+/* Kick all RR vCPUs */
+static void qemu_cpu_kick_rr_cpus(void)
+{
+ CPUState *cpu;
+
+ CPU_FOREACH(cpu) {
+ cpu_exit(cpu);
+ };
+}
+
+static void tcg_kick_vcpu_thread(CPUState *cpu)
+{
+ if (qemu_tcg_mttcg_enabled()) {
+ cpu_exit(cpu);
+ } else {
+ qemu_cpu_kick_rr_cpus();
+ }
+}
+
+/*
+ * TCG vCPU kick timer
+ *
+ * The kick timer is responsible for moving single threaded vCPU
+ * emulation on to the next vCPU. If more than one vCPU is running a
+ * timer event with force a cpu->exit so the next vCPU can get
+ * scheduled.
+ *
+ * The timer is removed if all vCPUs are idle and restarted again once
+ * idleness is complete.
+ */
+
+static QEMUTimer *tcg_kick_vcpu_timer;
+static CPUState *tcg_current_rr_cpu;
+
+#define TCG_KICK_PERIOD (NANOSECONDS_PER_SECOND / 10)
+
+static inline int64_t qemu_tcg_next_kick(void)
+{
+ return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + TCG_KICK_PERIOD;
+}
+
+/* Kick the currently round-robin scheduled vCPU to next */
+static void qemu_cpu_kick_rr_next_cpu(void)
+{
+ CPUState *cpu;
+ do {
+ cpu = atomic_mb_read(&tcg_current_rr_cpu);
+ if (cpu) {
+ cpu_exit(cpu);
+ }
+ } while (cpu != atomic_mb_read(&tcg_current_rr_cpu));
+}
+
+static void kick_tcg_thread(void *opaque)
+{
+ timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick());
+ qemu_cpu_kick_rr_next_cpu();
+}
+
+static void start_tcg_kick_timer(void)
+{
+ assert(!mttcg_enabled);
+ if (!tcg_kick_vcpu_timer && CPU_NEXT(first_cpu)) {
+ tcg_kick_vcpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
+ kick_tcg_thread, NULL);
+ }
+ if (tcg_kick_vcpu_timer && !timer_pending(tcg_kick_vcpu_timer)) {
+ timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick());
+ }
+}
+
+static void stop_tcg_kick_timer(void)
+{
+ assert(!mttcg_enabled);
+ if (tcg_kick_vcpu_timer && timer_pending(tcg_kick_vcpu_timer)) {
+ timer_del(tcg_kick_vcpu_timer);
+ }
+}
+
+static void qemu_tcg_destroy_vcpu(CPUState *cpu)
+{
+}
+
+static void qemu_tcg_rr_wait_io_event(void)
+{
+ CPUState *cpu;
+
+ while (all_cpu_threads_idle()) {
+ stop_tcg_kick_timer();
+ qemu_cond_wait_iothread(first_cpu->halt_cond);
+ }
+
+ start_tcg_kick_timer();
+
+ CPU_FOREACH(cpu) {
+ qemu_wait_io_event_common(cpu);
+ }
+}
+
+static int64_t tcg_get_icount_limit(void)
+{
+ int64_t deadline;
+
+ if (replay_mode != REPLAY_MODE_PLAY) {
+ /*
+ * Include all the timers, because they may need an attention.
+ * Too long CPU execution may create unnecessary delay in UI.
+ */
+ deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
+ QEMU_TIMER_ATTR_ALL);
+ /* Check realtime timers, because they help with input processing */
+ deadline = qemu_soonest_timeout(deadline,
+ qemu_clock_deadline_ns_all(QEMU_CLOCK_REALTIME,
+ QEMU_TIMER_ATTR_ALL));
+
+ /*
+ * Maintain prior (possibly buggy) behaviour where if no deadline
+ * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than
+ * INT32_MAX nanoseconds ahead, we still use INT32_MAX
+ * nanoseconds.
+ */
+ if ((deadline < 0) || (deadline > INT32_MAX)) {
+ deadline = INT32_MAX;
+ }
+
+ return icount_round(deadline);
+ } else {
+ return replay_get_instructions();
+ }
+}
+
+static void notify_aio_contexts(void)
+{
+ /* Wake up other AioContexts. */
+ qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
+ qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
+}
+
+static void handle_icount_deadline(void)
+{
+ assert(qemu_in_vcpu_thread());
+ if (icount_enabled()) {
+ int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
+ QEMU_TIMER_ATTR_ALL);
+
+ if (deadline == 0) {
+ notify_aio_contexts();
+ }
+ }
+}
+
+static void prepare_icount_for_run(CPUState *cpu)
+{
+ if (icount_enabled()) {
+ int insns_left;
+
+ /*
+ * These should always be cleared by process_icount_data after
+ * each vCPU execution. However u16.high can be raised
+ * asynchronously by cpu_exit/cpu_interrupt/tcg_handle_interrupt
+ */
+ g_assert(cpu_neg(cpu)->icount_decr.u16.low == 0);
+ g_assert(cpu->icount_extra == 0);
+
+ cpu->icount_budget = tcg_get_icount_limit();
+ insns_left = MIN(0xffff, cpu->icount_budget);
+ cpu_neg(cpu)->icount_decr.u16.low = insns_left;
+ cpu->icount_extra = cpu->icount_budget - insns_left;
+
+ replay_mutex_lock();
+
+ if (cpu->icount_budget == 0 && replay_has_checkpoint()) {
+ notify_aio_contexts();
+ }
+ }
+}
+
+static void process_icount_data(CPUState *cpu)
+{
+ if (icount_enabled()) {
+ /* Account for executed instructions */
+ icount_update(cpu);
+
+ /* Reset the counters */
+ cpu_neg(cpu)->icount_decr.u16.low = 0;
+ cpu->icount_extra = 0;
+ cpu->icount_budget = 0;
+
+ replay_account_executed_instructions();
+
+ replay_mutex_unlock();
+ }
+}
+
+static int tcg_cpu_exec(CPUState *cpu)
+{
+ int ret;
+#ifdef CONFIG_PROFILER
+ int64_t ti;
+#endif
+
+ assert(tcg_enabled());
+#ifdef CONFIG_PROFILER
+ ti = profile_getclock();
+#endif
+ cpu_exec_start(cpu);
+ ret = cpu_exec(cpu);
+ cpu_exec_end(cpu);
+#ifdef CONFIG_PROFILER
+ atomic_set(&tcg_ctx->prof.cpu_exec_time,
+ tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti);
+#endif
+ return ret;
+}
+
+/*
+ * Destroy any remaining vCPUs which have been unplugged and have
+ * finished running
+ */
+static void deal_with_unplugged_cpus(void)
+{
+ CPUState *cpu;
+
+ CPU_FOREACH(cpu) {
+ if (cpu->unplug && !cpu_can_run(cpu)) {
+ qemu_tcg_destroy_vcpu(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ break;
+ }
+ }
+}
+
+/*
+ * Single-threaded TCG
+ *
+ * In the single-threaded case each vCPU is simulated in turn. If
+ * there is more than a single vCPU we create a simple timer to kick
+ * the vCPU and ensure we don't get stuck in a tight loop in one vCPU.
+ * This is done explicitly rather than relying on side-effects
+ * elsewhere.
+ */
+
+static void *tcg_rr_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+
+ assert(tcg_enabled());
+ rcu_register_thread();
+ tcg_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ /* wait for initial kick-off after machine start */
+ while (first_cpu->stopped) {
+ qemu_cond_wait_iothread(first_cpu->halt_cond);
+
+ /* process any pending work */
+ CPU_FOREACH(cpu) {
+ current_cpu = cpu;
+ qemu_wait_io_event_common(cpu);
+ }
+ }
+
+ start_tcg_kick_timer();
+
+ cpu = first_cpu;
+
+ /* process any pending work */
+ cpu->exit_request = 1;
+
+ while (1) {
+ qemu_mutex_unlock_iothread();
+ replay_mutex_lock();
+ qemu_mutex_lock_iothread();
+ /* Account partial waits to QEMU_CLOCK_VIRTUAL. */
+ icount_account_warp_timer();
+
+ /*
+ * Run the timers here. This is much more efficient than
+ * waking up the I/O thread and waiting for completion.
+ */
+ handle_icount_deadline();
+
+ replay_mutex_unlock();
+
+ if (!cpu) {
+ cpu = first_cpu;
+ }
+
+ while (cpu && cpu_work_list_empty(cpu) && !cpu->exit_request) {
+
+ atomic_mb_set(&tcg_current_rr_cpu, cpu);
+ current_cpu = cpu;
+
+ qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
+ (cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
+
+ if (cpu_can_run(cpu)) {
+ int r;
+
+ qemu_mutex_unlock_iothread();
+ prepare_icount_for_run(cpu);
+
+ r = tcg_cpu_exec(cpu);
+
+ process_icount_data(cpu);
+ qemu_mutex_lock_iothread();
+
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ break;
+ } else if (r == EXCP_ATOMIC) {
+ qemu_mutex_unlock_iothread();
+ cpu_exec_step_atomic(cpu);
+ qemu_mutex_lock_iothread();
+ break;
+ }
+ } else if (cpu->stop) {
+ if (cpu->unplug) {
+ cpu = CPU_NEXT(cpu);
+ }
+ break;
+ }
+
+ cpu = CPU_NEXT(cpu);
+ } /* while (cpu && !cpu->exit_request).. */
+
+ /* Does not need atomic_mb_set because a spurious wakeup is okay. */
+ atomic_set(&tcg_current_rr_cpu, NULL);
+
+ if (cpu && cpu->exit_request) {
+ atomic_mb_set(&cpu->exit_request, 0);
+ }
+
+ if (icount_enabled() && all_cpu_threads_idle()) {
+ /*
+ * When all cpus are sleeping (e.g in WFI), to avoid a deadlock
+ * in the main_loop, wake it up in order to start the warp timer.
+ */
+ qemu_notify_event();
+ }
+
+ qemu_tcg_rr_wait_io_event();
+ deal_with_unplugged_cpus();
+ }
+
+ rcu_unregister_thread();
+ return NULL;
+}
+
+/*
+ * Multi-threaded TCG
+ *
+ * In the multi-threaded case each vCPU has its own thread. The TLS
+ * variable current_cpu can be used deep in the code to find the
+ * current CPUState for a given thread.
+ */
+
+static void *tcg_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+
+ assert(tcg_enabled());
+ g_assert(!icount_enabled());
+
+ rcu_register_thread();
+ tcg_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ current_cpu = cpu;
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ /* process any pending work */
+ cpu->exit_request = 1;
+
+ do {
+ if (cpu_can_run(cpu)) {
+ int r;
+ qemu_mutex_unlock_iothread();
+ r = tcg_cpu_exec(cpu);
+ qemu_mutex_lock_iothread();
+ switch (r) {
+ case EXCP_DEBUG:
+ cpu_handle_guest_debug(cpu);
+ break;
+ case EXCP_HALTED:
+ /*
+ * during start-up the vCPU is reset and the thread is
+ * kicked several times. If we don't ensure we go back
+ * to sleep in the halted state we won't cleanly
+ * start-up when the vCPU is enabled.
+ *
+ * cpu->halted should ensure we sleep in wait_io_event
+ */
+ g_assert(cpu->halted);
+ break;
+ case EXCP_ATOMIC:
+ qemu_mutex_unlock_iothread();
+ cpu_exec_step_atomic(cpu);
+ qemu_mutex_lock_iothread();
+ default:
+ /* Ignore everything else? */
+ break;
+ }
+ }
+
+ atomic_mb_set(&cpu->exit_request, 0);
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+
+ qemu_tcg_destroy_vcpu(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void tcg_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+ static QemuCond *single_tcg_halt_cond;
+ static QemuThread *single_tcg_cpu_thread;
+ static int tcg_region_inited;
+
+ assert(tcg_enabled());
+ /*
+ * Initialize TCG regions--once. Now is a good time, because:
+ * (1) TCG's init context, prologue and target globals have been set up.
+ * (2) qemu_tcg_mttcg_enabled() works now (TCG init code runs before the
+ * -accel flag is processed, so the check doesn't work then).
+ */
+ if (!tcg_region_inited) {
+ tcg_region_inited = 1;
+ tcg_region_init();
+ }
+
+ if (qemu_tcg_mttcg_enabled() || !single_tcg_cpu_thread) {
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+
+ if (qemu_tcg_mttcg_enabled()) {
+ /* create a thread per vCPU with TCG (MTTCG) */
+ parallel_cpus = true;
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/TCG",
+ cpu->cpu_index);
+
+ qemu_thread_create(cpu->thread, thread_name, tcg_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+
+ } else {
+ /* share a single thread for all cpus with TCG */
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "ALL CPUs/TCG");
+ qemu_thread_create(cpu->thread, thread_name,
+ tcg_rr_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+
+ single_tcg_halt_cond = cpu->halt_cond;
+ single_tcg_cpu_thread = cpu->thread;
+ }
+#ifdef _WIN32
+ cpu->hThread = qemu_thread_get_handle(cpu->thread);
+#endif
+ } else {
+ /* For non-MTTCG cases we share the thread */
+ cpu->thread = single_tcg_cpu_thread;
+ cpu->halt_cond = single_tcg_halt_cond;
+ cpu->thread_id = first_cpu->thread_id;
+ cpu->can_do_io = 1;
+ cpu->created = true;
+ }
+}
+
+static int64_t tcg_get_virtual_clock(void)
+{
+ if (icount_enabled()) {
+ return icount_get();
+ }
+ return cpu_get_clock();
+}
+
+static int64_t tcg_get_elapsed_ticks(void)
+{
+ if (icount_enabled()) {
+ return icount_get();
+ }
+ return cpu_get_ticks();
+}
+
+CpusAccel tcg_cpus = {
+ .create_vcpu_thread = tcg_start_vcpu_thread,
+ .kick_vcpu_thread = tcg_kick_vcpu_thread,
+ .get_virtual_clock = tcg_get_virtual_clock,
+ .get_elapsed_ticks = tcg_get_elapsed_ticks,
+};
diff --git a/accel/tcg/tcg-cpus.h b/accel/tcg/tcg-cpus.h
new file mode 100644
index 0000000000..af4be6a151
--- /dev/null
+++ b/accel/tcg/tcg-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef TCG_CPUS_H
+#define TCG_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel tcg_cpus;
+
+#endif /* TCG_CPUS_H */
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 2b15b5f86b..a57cb4f28c 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -24,27 +24,19 @@
#include "qemu/osdep.h"
#include "qemu-common.h"
-#include "qemu/config-file.h"
-#include "qemu/cutils.h"
-#include "migration/vmstate.h"
#include "monitor/monitor.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-events-run-state.h"
#include "qapi/qmp/qerror.h"
-#include "qemu/error-report.h"
-#include "qemu/qemu-print.h"
#include "sysemu/tcg.h"
-#include "sysemu/block-backend.h"
#include "exec/gdbstub.h"
-#include "sysemu/dma.h"
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
#include "sysemu/hax.h"
#include "sysemu/hvf.h"
#include "sysemu/whpx.h"
#include "exec/exec-all.h"
-
#include "qemu/thread.h"
#include "qemu/plugin.h"
#include "sysemu/cpus.h"
@@ -124,79 +116,6 @@ bool all_cpu_threads_idle(void)
return true;
}
-bool mttcg_enabled;
-
-
-/***********************************************************/
-/* TCG vCPU kick timer
- *
- * The kick timer is responsible for moving single threaded vCPU
- * emulation on to the next vCPU. If more than one vCPU is running a
- * timer event with force a cpu->exit so the next vCPU can get
- * scheduled.
- *
- * The timer is removed if all vCPUs are idle and restarted again once
- * idleness is complete.
- */
-
-static QEMUTimer *tcg_kick_vcpu_timer;
-static CPUState *tcg_current_rr_cpu;
-
-#define TCG_KICK_PERIOD (NANOSECONDS_PER_SECOND / 10)
-
-static inline int64_t qemu_tcg_next_kick(void)
-{
- return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + TCG_KICK_PERIOD;
-}
-
-/* Kick the currently round-robin scheduled vCPU to next */
-static void qemu_cpu_kick_rr_next_cpu(void)
-{
- CPUState *cpu;
- do {
- cpu = atomic_mb_read(&tcg_current_rr_cpu);
- if (cpu) {
- cpu_exit(cpu);
- }
- } while (cpu != atomic_mb_read(&tcg_current_rr_cpu));
-}
-
-/* Kick all RR vCPUs */
-static void qemu_cpu_kick_rr_cpus(void)
-{
- CPUState *cpu;
-
- CPU_FOREACH(cpu) {
- cpu_exit(cpu);
- };
-}
-
-static void kick_tcg_thread(void *opaque)
-{
- timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick());
- qemu_cpu_kick_rr_next_cpu();
-}
-
-static void start_tcg_kick_timer(void)
-{
- assert(!mttcg_enabled);
- if (!tcg_kick_vcpu_timer && CPU_NEXT(first_cpu)) {
- tcg_kick_vcpu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
- kick_tcg_thread, NULL);
- }
- if (tcg_kick_vcpu_timer && !timer_pending(tcg_kick_vcpu_timer)) {
- timer_mod(tcg_kick_vcpu_timer, qemu_tcg_next_kick());
- }
-}
-
-static void stop_tcg_kick_timer(void)
-{
- assert(!mttcg_enabled);
- if (tcg_kick_vcpu_timer && timer_pending(tcg_kick_vcpu_timer)) {
- timer_del(tcg_kick_vcpu_timer);
- }
-}
-
/***********************************************************/
void hw_error(const char *fmt, ...)
{
@@ -328,9 +247,7 @@ int64_t cpus_get_virtual_clock(void)
if (cpus_accel && cpus_accel->get_virtual_clock) {
return cpus_accel->get_virtual_clock();
}
- if (icount_enabled()) {
- return icount_get();
- } else if (qtest_enabled()) { /* for qtest_clock_warp */
+ if (qtest_enabled()) { /* for qtest_clock_warp */
return qtest_get_virtual_clock();
}
return cpu_get_clock();
@@ -346,9 +263,6 @@ int64_t cpus_get_elapsed_ticks(void)
if (cpus_accel && cpus_accel->get_elapsed_ticks) {
return cpus_accel->get_elapsed_ticks();
}
- if (icount_enabled()) {
- return icount_get();
- }
return cpu_get_ticks();
}
@@ -482,10 +396,6 @@ static void qemu_kvm_destroy_vcpu(CPUState *cpu)
}
}
-static void qemu_tcg_destroy_vcpu(CPUState *cpu)
-{
-}
-
static void qemu_cpu_stop(CPUState *cpu, bool exit)
{
g_assert(qemu_cpu_is_self(cpu));
@@ -506,22 +416,6 @@ void qemu_wait_io_event_common(CPUState *cpu)
process_queued_cpu_work(cpu);
}
-static void qemu_tcg_rr_wait_io_event(void)
-{
- CPUState *cpu;
-
- while (all_cpu_threads_idle()) {
- stop_tcg_kick_timer();
- qemu_cond_wait(first_cpu->halt_cond, &qemu_global_mutex);
- }
-
- start_tcg_kick_timer();
-
- CPU_FOREACH(cpu) {
- qemu_wait_io_event_common(cpu);
- }
-}
-
void qemu_wait_io_event(CPUState *cpu)
{
bool slept = false;
@@ -633,259 +527,6 @@ static void *qemu_dummy_cpu_thread_fn(void *arg)
#endif
}
-static int64_t tcg_get_icount_limit(void)
-{
- int64_t deadline;
-
- if (replay_mode != REPLAY_MODE_PLAY) {
- /*
- * Include all the timers, because they may need an attention.
- * Too long CPU execution may create unnecessary delay in UI.
- */
- deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
- QEMU_TIMER_ATTR_ALL);
- /* Check realtime timers, because they help with input processing */
- deadline = qemu_soonest_timeout(deadline,
- qemu_clock_deadline_ns_all(QEMU_CLOCK_REALTIME,
- QEMU_TIMER_ATTR_ALL));
-
- /* Maintain prior (possibly buggy) behaviour where if no deadline
- * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than
- * INT32_MAX nanoseconds ahead, we still use INT32_MAX
- * nanoseconds.
- */
- if ((deadline < 0) || (deadline > INT32_MAX)) {
- deadline = INT32_MAX;
- }
-
- return icount_round(deadline);
- } else {
- return replay_get_instructions();
- }
-}
-
-static void notify_aio_contexts(void)
-{
- /* Wake up other AioContexts. */
- qemu_clock_notify(QEMU_CLOCK_VIRTUAL);
- qemu_clock_run_timers(QEMU_CLOCK_VIRTUAL);
-}
-
-static void handle_icount_deadline(void)
-{
- assert(qemu_in_vcpu_thread());
- if (icount_enabled()) {
- int64_t deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
- QEMU_TIMER_ATTR_ALL);
-
- if (deadline == 0) {
- notify_aio_contexts();
- }
- }
-}
-
-static void prepare_icount_for_run(CPUState *cpu)
-{
- if (icount_enabled()) {
- int insns_left;
-
- /* These should always be cleared by process_icount_data after
- * each vCPU execution. However u16.high can be raised
- * asynchronously by cpu_exit/cpu_interrupt/tcg_handle_interrupt
- */
- g_assert(cpu_neg(cpu)->icount_decr.u16.low == 0);
- g_assert(cpu->icount_extra == 0);
-
- cpu->icount_budget = tcg_get_icount_limit();
- insns_left = MIN(0xffff, cpu->icount_budget);
- cpu_neg(cpu)->icount_decr.u16.low = insns_left;
- cpu->icount_extra = cpu->icount_budget - insns_left;
-
- replay_mutex_lock();
-
- if (cpu->icount_budget == 0 && replay_has_checkpoint()) {
- notify_aio_contexts();
- }
- }
-}
-
-static void process_icount_data(CPUState *cpu)
-{
- if (icount_enabled()) {
- /* Account for executed instructions */
- icount_update(cpu);
-
- /* Reset the counters */
- cpu_neg(cpu)->icount_decr.u16.low = 0;
- cpu->icount_extra = 0;
- cpu->icount_budget = 0;
-
- replay_account_executed_instructions();
-
- replay_mutex_unlock();
- }
-}
-
-
-static int tcg_cpu_exec(CPUState *cpu)
-{
- int ret;
-#ifdef CONFIG_PROFILER
- int64_t ti;
-#endif
-
- assert(tcg_enabled());
-#ifdef CONFIG_PROFILER
- ti = profile_getclock();
-#endif
- cpu_exec_start(cpu);
- ret = cpu_exec(cpu);
- cpu_exec_end(cpu);
-#ifdef CONFIG_PROFILER
- atomic_set(&tcg_ctx->prof.cpu_exec_time,
- tcg_ctx->prof.cpu_exec_time + profile_getclock() - ti);
-#endif
- return ret;
-}
-
-/* Destroy any remaining vCPUs which have been unplugged and have
- * finished running
- */
-static void deal_with_unplugged_cpus(void)
-{
- CPUState *cpu;
-
- CPU_FOREACH(cpu) {
- if (cpu->unplug && !cpu_can_run(cpu)) {
- qemu_tcg_destroy_vcpu(cpu);
- cpu_thread_signal_destroyed(cpu);
- break;
- }
- }
-}
-
-/* Single-threaded TCG
- *
- * In the single-threaded case each vCPU is simulated in turn. If
- * there is more than a single vCPU we create a simple timer to kick
- * the vCPU and ensure we don't get stuck in a tight loop in one vCPU.
- * This is done explicitly rather than relying on side-effects
- * elsewhere.
- */
-
-static void *qemu_tcg_rr_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
-
- assert(tcg_enabled());
- rcu_register_thread();
- tcg_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
-
- cpu->thread_id = qemu_get_thread_id();
- cpu->can_do_io = 1;
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- /* wait for initial kick-off after machine start */
- while (first_cpu->stopped) {
- qemu_cond_wait(first_cpu->halt_cond, &qemu_global_mutex);
-
- /* process any pending work */
- CPU_FOREACH(cpu) {
- current_cpu = cpu;
- qemu_wait_io_event_common(cpu);
- }
- }
-
- start_tcg_kick_timer();
-
- cpu = first_cpu;
-
- /* process any pending work */
- cpu->exit_request = 1;
-
- while (1) {
- qemu_mutex_unlock_iothread();
- replay_mutex_lock();
- qemu_mutex_lock_iothread();
- /* Account partial waits to QEMU_CLOCK_VIRTUAL. */
- icount_account_warp_timer();
-
- /* Run the timers here. This is much more efficient than
- * waking up the I/O thread and waiting for completion.
- */
- handle_icount_deadline();
-
- replay_mutex_unlock();
-
- if (!cpu) {
- cpu = first_cpu;
- }
-
- while (cpu && cpu_work_list_empty(cpu) && !cpu->exit_request) {
-
- atomic_mb_set(&tcg_current_rr_cpu, cpu);
- current_cpu = cpu;
-
- qemu_clock_enable(QEMU_CLOCK_VIRTUAL,
- (cpu->singlestep_enabled & SSTEP_NOTIMER) == 0);
-
- if (cpu_can_run(cpu)) {
- int r;
-
- qemu_mutex_unlock_iothread();
- prepare_icount_for_run(cpu);
-
- r = tcg_cpu_exec(cpu);
-
- process_icount_data(cpu);
- qemu_mutex_lock_iothread();
-
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- break;
- } else if (r == EXCP_ATOMIC) {
- qemu_mutex_unlock_iothread();
- cpu_exec_step_atomic(cpu);
- qemu_mutex_lock_iothread();
- break;
- }
- } else if (cpu->stop) {
- if (cpu->unplug) {
- cpu = CPU_NEXT(cpu);
- }
- break;
- }
-
- cpu = CPU_NEXT(cpu);
- } /* while (cpu && !cpu->exit_request).. */
-
- /* Does not need atomic_mb_set because a spurious wakeup is okay. */
- atomic_set(&tcg_current_rr_cpu, NULL);
-
- if (cpu && cpu->exit_request) {
- atomic_mb_set(&cpu->exit_request, 0);
- }
-
- if (icount_enabled() && all_cpu_threads_idle()) {
- /*
- * When all cpus are sleeping (e.g in WFI), to avoid a deadlock
- * in the main_loop, wake it up in order to start the warp timer.
- */
- qemu_notify_event();
- }
-
- qemu_tcg_rr_wait_io_event();
- deal_with_unplugged_cpus();
- }
-
- rcu_unregister_thread();
- return NULL;
-}
-
static void *qemu_hax_cpu_thread_fn(void *arg)
{
CPUState *cpu = arg;
@@ -1005,76 +646,6 @@ static void CALLBACK dummy_apc_func(ULONG_PTR unused)
}
#endif
-/* Multi-threaded TCG
- *
- * In the multi-threaded case each vCPU has its own thread. The TLS
- * variable current_cpu can be used deep in the code to find the
- * current CPUState for a given thread.
- */
-
-static void *qemu_tcg_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
-
- assert(tcg_enabled());
- g_assert(!icount_enabled());
-
- rcu_register_thread();
- tcg_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
-
- cpu->thread_id = qemu_get_thread_id();
- cpu->can_do_io = 1;
- current_cpu = cpu;
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- /* process any pending work */
- cpu->exit_request = 1;
-
- do {
- if (cpu_can_run(cpu)) {
- int r;
- qemu_mutex_unlock_iothread();
- r = tcg_cpu_exec(cpu);
- qemu_mutex_lock_iothread();
- switch (r) {
- case EXCP_DEBUG:
- cpu_handle_guest_debug(cpu);
- break;
- case EXCP_HALTED:
- /* during start-up the vCPU is reset and the thread is
- * kicked several times. If we don't ensure we go back
- * to sleep in the halted state we won't cleanly
- * start-up when the vCPU is enabled.
- *
- * cpu->halted should ensure we sleep in wait_io_event
- */
- g_assert(cpu->halted);
- break;
- case EXCP_ATOMIC:
- qemu_mutex_unlock_iothread();
- cpu_exec_step_atomic(cpu);
- qemu_mutex_lock_iothread();
- default:
- /* Ignore everything else? */
- break;
- }
- }
-
- atomic_mb_set(&cpu->exit_request, 0);
- qemu_wait_io_event(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
-
- qemu_tcg_destroy_vcpu(cpu);
- cpu_thread_signal_destroyed(cpu);
- qemu_mutex_unlock_iothread();
- rcu_unregister_thread();
- return NULL;
-}
-
void cpus_kick_thread(CPUState *cpu)
{
#ifndef _WIN32
@@ -1105,15 +676,8 @@ void cpus_kick_thread(CPUState *cpu)
void qemu_cpu_kick(CPUState *cpu)
{
qemu_cond_broadcast(cpu->halt_cond);
-
if (cpus_accel && cpus_accel->kick_vcpu_thread) {
cpus_accel->kick_vcpu_thread(cpu);
- } else if (tcg_enabled()) {
- if (qemu_tcg_mttcg_enabled()) {
- cpu_exit(cpu);
- } else {
- qemu_cpu_kick_rr_cpus();
- }
} else {
if (hax_enabled()) {
/*
@@ -1269,62 +833,6 @@ void cpu_remove_sync(CPUState *cpu)
qemu_mutex_lock_iothread();
}
-static void qemu_tcg_init_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
- static QemuCond *single_tcg_halt_cond;
- static QemuThread *single_tcg_cpu_thread;
- static int tcg_region_inited;
-
- assert(tcg_enabled());
- /*
- * Initialize TCG regions--once. Now is a good time, because:
- * (1) TCG's init context, prologue and target globals have been set up.
- * (2) qemu_tcg_mttcg_enabled() works now (TCG init code runs before the
- * -accel flag is processed, so the check doesn't work then).
- */
- if (!tcg_region_inited) {
- tcg_region_inited = 1;
- tcg_region_init();
- }
-
- if (qemu_tcg_mttcg_enabled() || !single_tcg_cpu_thread) {
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
-
- if (qemu_tcg_mttcg_enabled()) {
- /* create a thread per vCPU with TCG (MTTCG) */
- parallel_cpus = true;
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/TCG",
- cpu->cpu_index);
-
- qemu_thread_create(cpu->thread, thread_name, qemu_tcg_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-
- } else {
- /* share a single thread for all cpus with TCG */
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "ALL CPUs/TCG");
- qemu_thread_create(cpu->thread, thread_name,
- qemu_tcg_rr_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-
- single_tcg_halt_cond = cpu->halt_cond;
- single_tcg_cpu_thread = cpu->thread;
- }
-#ifdef _WIN32
- cpu->hThread = qemu_thread_get_handle(cpu->thread);
-#endif
- } else {
- /* For non-MTTCG cases we share the thread */
- cpu->thread = single_tcg_cpu_thread;
- cpu->halt_cond = single_tcg_halt_cond;
- cpu->thread_id = first_cpu->thread_id;
- cpu->can_do_io = 1;
- cpu->created = true;
- }
-}
-
static void qemu_hax_start_vcpu(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
@@ -1435,8 +943,6 @@ void qemu_init_vcpu(CPUState *cpu)
qemu_hax_start_vcpu(cpu);
} else if (hvf_enabled()) {
qemu_hvf_start_vcpu(cpu);
- } else if (tcg_enabled()) {
- qemu_tcg_init_vcpu(cpu);
} else if (whpx_enabled()) {
qemu_whpx_start_vcpu(cpu);
} else {
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (2 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:42 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm Claudio Fontana
` (10 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
register a "CpusAccel" interface for qtest as well.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
MAINTAINERS | 2 +-
accel/Makefile.objs | 2 +-
accel/qtest/Makefile.objs | 2 ++
accel/qtest/qtest-cpus.c | 91 +++++++++++++++++++++++++++++++++++++++++++++++
accel/qtest/qtest-cpus.h | 17 +++++++++
accel/{ => qtest}/qtest.c | 7 ++++
softmmu/cpus.c | 64 +--------------------------------
7 files changed, 120 insertions(+), 65 deletions(-)
create mode 100644 accel/qtest/Makefile.objs
create mode 100644 accel/qtest/qtest-cpus.c
create mode 100644 accel/qtest/qtest-cpus.h
rename accel/{ => qtest}/qtest.c (86%)
diff --git a/MAINTAINERS b/MAINTAINERS
index 7dcc3ef4c8..f8bac8cb64 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2442,7 +2442,7 @@ M: Laurent Vivier <lvivier@redhat.com>
R: Paolo Bonzini <pbonzini@redhat.com>
S: Maintained
F: softmmu/qtest.c
-F: accel/qtest.c
+F: accel/qtest/
F: tests/qtest/
X: tests/qtest/bios-tables-test-allowed-diff.h
diff --git a/accel/Makefile.objs b/accel/Makefile.objs
index ff72f0d030..c5e58eb53d 100644
--- a/accel/Makefile.objs
+++ b/accel/Makefile.objs
@@ -1,5 +1,5 @@
common-obj-$(CONFIG_SOFTMMU) += accel.o
-obj-$(call land,$(CONFIG_SOFTMMU),$(CONFIG_POSIX)) += qtest.o
+obj-$(call land,$(CONFIG_SOFTMMU),$(CONFIG_POSIX)) += qtest/
obj-$(CONFIG_KVM) += kvm/
obj-$(CONFIG_TCG) += tcg/
obj-$(CONFIG_XEN) += xen/
diff --git a/accel/qtest/Makefile.objs b/accel/qtest/Makefile.objs
new file mode 100644
index 0000000000..627014200e
--- /dev/null
+++ b/accel/qtest/Makefile.objs
@@ -0,0 +1,2 @@
+obj-y += qtest.o
+obj-y += qtest-cpus.o
diff --git a/accel/qtest/qtest-cpus.c b/accel/qtest/qtest-cpus.c
new file mode 100644
index 0000000000..ac10976ac6
--- /dev/null
+++ b/accel/qtest/qtest-cpus.c
@@ -0,0 +1,91 @@
+/*
+ * QTest accelerator code
+ *
+ * Copyright IBM, Corp. 2011
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/rcu.h"
+#include "qapi/error.h"
+#include "qemu/module.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
+#include "sysemu/accel.h"
+#include "sysemu/qtest.h"
+#include "sysemu/cpus.h"
+#include "sysemu/cpu-timers.h"
+#include "qemu/guest-random.h"
+#include "qemu/main-loop.h"
+#include "hw/core/cpu.h"
+
+#include "qtest-cpus.h"
+
+static void *qtest_cpu_thread_fn(void *arg)
+{
+#ifdef _WIN32
+ error_report("qtest is not supported under Windows");
+ exit(1);
+#else
+ CPUState *cpu = arg;
+ sigset_t waitset;
+ int r;
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ current_cpu = cpu;
+
+ sigemptyset(&waitset);
+ sigaddset(&waitset, SIG_IPI);
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ qemu_mutex_unlock_iothread();
+ do {
+ int sig;
+ r = sigwait(&waitset, &sig);
+ } while (r == -1 && (errno == EAGAIN || errno == EINTR));
+ if (r == -1) {
+ perror("sigwait");
+ exit(1);
+ }
+ qemu_mutex_lock_iothread();
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug);
+
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+#endif
+}
+
+static void qtest_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/DUMMY",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, qtest_cpu_thread_fn, cpu,
+ QEMU_THREAD_JOINABLE);
+}
+
+CpusAccel qtest_cpus = {
+ .create_vcpu_thread = qtest_start_vcpu_thread,
+ .get_virtual_clock = qtest_get_virtual_clock,
+};
diff --git a/accel/qtest/qtest-cpus.h b/accel/qtest/qtest-cpus.h
new file mode 100644
index 0000000000..c1fab96b9e
--- /dev/null
+++ b/accel/qtest/qtest-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef QTEST_CPUS_H
+#define QTEST_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel qtest_cpus;
+
+#endif /* QTEST_CPUS_H */
diff --git a/accel/qtest.c b/accel/qtest/qtest.c
similarity index 86%
rename from accel/qtest.c
rename to accel/qtest/qtest.c
index 119d0f16a4..537e8b449c 100644
--- a/accel/qtest.c
+++ b/accel/qtest/qtest.c
@@ -12,6 +12,7 @@
*/
#include "qemu/osdep.h"
+#include "qemu/rcu.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "qemu/option.h"
@@ -20,9 +21,15 @@
#include "sysemu/qtest.h"
#include "sysemu/cpus.h"
#include "sysemu/cpu-timers.h"
+#include "qemu/guest-random.h"
+#include "qemu/main-loop.h"
+#include "hw/core/cpu.h"
+
+#include "qtest-cpus.h"
static int qtest_init_accel(MachineState *ms)
{
+ cpus_register_accel(&qtest_cpus);
return 0;
}
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index a57cb4f28c..896d508c15 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -40,7 +40,6 @@
#include "qemu/thread.h"
#include "qemu/plugin.h"
#include "sysemu/cpus.h"
-#include "sysemu/qtest.h"
#include "qemu/main-loop.h"
#include "qemu/option.h"
#include "qemu/bitmap.h"
@@ -247,9 +246,6 @@ int64_t cpus_get_virtual_clock(void)
if (cpus_accel && cpus_accel->get_virtual_clock) {
return cpus_accel->get_virtual_clock();
}
- if (qtest_enabled()) { /* for qtest_clock_warp */
- return qtest_get_virtual_clock();
- }
return cpu_get_clock();
}
@@ -482,51 +478,6 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
return NULL;
}
-static void *qemu_dummy_cpu_thread_fn(void *arg)
-{
-#ifdef _WIN32
- error_report("qtest is not supported under Windows");
- exit(1);
-#else
- CPUState *cpu = arg;
- sigset_t waitset;
- int r;
-
- rcu_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
- cpu->thread_id = qemu_get_thread_id();
- cpu->can_do_io = 1;
- current_cpu = cpu;
-
- sigemptyset(&waitset);
- sigaddset(&waitset, SIG_IPI);
-
- /* signal CPU creation */
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- do {
- qemu_mutex_unlock_iothread();
- do {
- int sig;
- r = sigwait(&waitset, &sig);
- } while (r == -1 && (errno == EAGAIN || errno == EINTR));
- if (r == -1) {
- perror("sigwait");
- exit(1);
- }
- qemu_mutex_lock_iothread();
- qemu_wait_io_event(cpu);
- } while (!cpu->unplug);
-
- qemu_mutex_unlock_iothread();
- rcu_unregister_thread();
- return NULL;
-#endif
-}
-
static void *qemu_hax_cpu_thread_fn(void *arg)
{
CPUState *cpu = arg;
@@ -904,19 +855,6 @@ void cpus_register_accel(CpusAccel *ca)
cpus_accel = ca;
}
-static void qemu_dummy_start_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
-
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/DUMMY",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_dummy_cpu_thread_fn, cpu,
- QEMU_THREAD_JOINABLE);
-}
-
void qemu_init_vcpu(CPUState *cpu)
{
MachineState *ms = MACHINE(qdev_get_machine());
@@ -946,7 +884,7 @@ void qemu_init_vcpu(CPUState *cpu)
} else if (whpx_enabled()) {
qemu_whpx_start_vcpu(cpu);
} else {
- qemu_dummy_start_vcpu(cpu);
+ assert(0);
}
while (!cpu->created) {
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (3 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:44 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/ Claudio Fontana
` (9 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
register a "CpusAccel" interface for KVM as well.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
accel/kvm/Makefile.objs | 2 ++
accel/kvm/kvm-all.c | 14 +++++++-
accel/kvm/kvm-cpus.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++
accel/kvm/kvm-cpus.h | 17 ++++++++++
accel/stubs/kvm-stub.c | 3 +-
include/sysemu/kvm.h | 2 +-
softmmu/cpus.c | 77 -------------------------------------------
7 files changed, 122 insertions(+), 81 deletions(-)
create mode 100644 accel/kvm/kvm-cpus.c
create mode 100644 accel/kvm/kvm-cpus.h
diff --git a/accel/kvm/Makefile.objs b/accel/kvm/Makefile.objs
index fdfa481578..ce0f492b8d 100644
--- a/accel/kvm/Makefile.objs
+++ b/accel/kvm/Makefile.objs
@@ -1,2 +1,4 @@
obj-y += kvm-all.o
+obj-y += kvm-cpus.o
+
obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 63ef6af9a1..fbd82cb444 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -44,6 +44,9 @@
#include "qapi/qapi-types-common.h"
#include "qapi/qapi-visit-common.h"
#include "sysemu/reset.h"
+#include "qemu/guest-random.h"
+#include "sysemu/hw_accel.h"
+#include "kvm-cpus.h"
#include "hw/boards.h"
@@ -378,7 +381,7 @@ err:
return ret;
}
-int kvm_destroy_vcpu(CPUState *cpu)
+static int do_kvm_destroy_vcpu(CPUState *cpu)
{
KVMState *s = kvm_state;
long mmap_size;
@@ -412,6 +415,14 @@ err:
return ret;
}
+void kvm_destroy_vcpu(CPUState *cpu)
+{
+ if (do_kvm_destroy_vcpu(cpu) < 0) {
+ error_report("kvm_destroy_vcpu failed");
+ exit(EXIT_FAILURE);
+ }
+}
+
static int kvm_get_vcpu(KVMState *s, unsigned long vcpu_id)
{
struct KVMParkedVcpu *cpu;
@@ -2232,6 +2243,7 @@ static int kvm_init(MachineState *ms)
assert(!ret);
}
+ cpus_register_accel(&kvm_cpus);
return 0;
err:
diff --git a/accel/kvm/kvm-cpus.c b/accel/kvm/kvm-cpus.c
new file mode 100644
index 0000000000..7866a2e9c3
--- /dev/null
+++ b/accel/kvm/kvm-cpus.c
@@ -0,0 +1,88 @@
+/*
+ * QEMU KVM support
+ *
+ * Copyright IBM, Corp. 2008
+ * Red Hat, Inc. 2008
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ * Glauber Costa <gcosta@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+#include "sysemu/kvm_int.h"
+#include "sysemu/runstate.h"
+#include "sysemu/cpus.h"
+#include "qemu/guest-random.h"
+
+#include "kvm-cpus.h"
+
+static void *kvm_vcpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+ int r;
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ current_cpu = cpu;
+
+ r = kvm_init_vcpu(cpu);
+ if (r < 0) {
+ error_report("kvm_init_vcpu failed: %s", strerror(-r));
+ exit(1);
+ }
+
+ kvm_init_cpu_signals(cpu);
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ if (cpu_can_run(cpu)) {
+ r = kvm_cpu_exec(cpu);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ }
+ }
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+
+ kvm_destroy_vcpu(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void kvm_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, kvm_vcpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+}
+
+CpusAccel kvm_cpus = {
+ .create_vcpu_thread = kvm_start_vcpu_thread,
+
+ .synchronize_post_reset = kvm_cpu_synchronize_post_reset,
+ .synchronize_post_init = kvm_cpu_synchronize_post_init,
+ .synchronize_state = kvm_cpu_synchronize_state,
+ .synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm,
+};
diff --git a/accel/kvm/kvm-cpus.h b/accel/kvm/kvm-cpus.h
new file mode 100644
index 0000000000..62fbc911d9
--- /dev/null
+++ b/accel/kvm/kvm-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef KVM_CPUS_H
+#define KVM_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel kvm_cpus;
+
+#endif /* KVM_CPUS_H */
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index 82f118d2df..69f8a842da 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -32,9 +32,8 @@ bool kvm_readonly_mem_allowed;
bool kvm_ioeventfd_any_length_allowed;
bool kvm_msi_use_devid;
-int kvm_destroy_vcpu(CPUState *cpu)
+void kvm_destroy_vcpu(CPUState *cpu)
{
- return -ENOSYS;
}
int kvm_init_vcpu(CPUState *cpu)
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index b4174d941c..7a5f973b6f 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -218,7 +218,7 @@ int kvm_has_intx_set_mask(void);
int kvm_init_vcpu(CPUState *cpu);
int kvm_cpu_exec(CPUState *cpu);
-int kvm_destroy_vcpu(CPUState *cpu);
+void kvm_destroy_vcpu(CPUState *cpu);
/**
* kvm_arm_supports_user_irq
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 896d508c15..bd535c68e0 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -179,9 +179,6 @@ void cpu_synchronize_state(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_state) {
cpus_accel->synchronize_state(cpu);
}
- if (kvm_enabled()) {
- kvm_cpu_synchronize_state(cpu);
- }
if (hax_enabled()) {
hax_cpu_synchronize_state(cpu);
}
@@ -195,9 +192,6 @@ void cpu_synchronize_post_reset(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_reset) {
cpus_accel->synchronize_post_reset(cpu);
}
- if (kvm_enabled()) {
- kvm_cpu_synchronize_post_reset(cpu);
- }
if (hax_enabled()) {
hax_cpu_synchronize_post_reset(cpu);
}
@@ -211,9 +205,6 @@ void cpu_synchronize_post_init(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_init) {
cpus_accel->synchronize_post_init(cpu);
}
- if (kvm_enabled()) {
- kvm_cpu_synchronize_post_init(cpu);
- }
if (hax_enabled()) {
hax_cpu_synchronize_post_init(cpu);
}
@@ -227,9 +218,6 @@ void cpu_synchronize_pre_loadvm(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_pre_loadvm) {
cpus_accel->synchronize_pre_loadvm(cpu);
}
- if (kvm_enabled()) {
- kvm_cpu_synchronize_pre_loadvm(cpu);
- }
if (hax_enabled()) {
hax_cpu_synchronize_pre_loadvm(cpu);
}
@@ -384,14 +372,6 @@ void run_on_cpu(CPUState *cpu, run_on_cpu_func func, run_on_cpu_data data)
do_run_on_cpu(cpu, func, data, &qemu_global_mutex);
}
-static void qemu_kvm_destroy_vcpu(CPUState *cpu)
-{
- if (kvm_destroy_vcpu(cpu) < 0) {
- error_report("kvm_destroy_vcpu failed");
- exit(EXIT_FAILURE);
- }
-}
-
static void qemu_cpu_stop(CPUState *cpu, bool exit)
{
g_assert(qemu_cpu_is_self(cpu));
@@ -436,48 +416,6 @@ void qemu_wait_io_event(CPUState *cpu)
qemu_wait_io_event_common(cpu);
}
-static void *qemu_kvm_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
- int r;
-
- rcu_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
- cpu->thread_id = qemu_get_thread_id();
- cpu->can_do_io = 1;
- current_cpu = cpu;
-
- r = kvm_init_vcpu(cpu);
- if (r < 0) {
- error_report("kvm_init_vcpu failed: %s", strerror(-r));
- exit(1);
- }
-
- kvm_init_cpu_signals(cpu);
-
- /* signal CPU creation */
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- do {
- if (cpu_can_run(cpu)) {
- r = kvm_cpu_exec(cpu);
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- }
- }
- qemu_wait_io_event(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
-
- qemu_kvm_destroy_vcpu(cpu);
- cpu_thread_signal_destroyed(cpu);
- qemu_mutex_unlock_iothread();
- rcu_unregister_thread();
- return NULL;
-}
-
static void *qemu_hax_cpu_thread_fn(void *arg)
{
CPUState *cpu = arg;
@@ -801,19 +739,6 @@ static void qemu_hax_start_vcpu(CPUState *cpu)
#endif
}
-static void qemu_kvm_start_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
-
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_kvm_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-}
-
static void qemu_hvf_start_vcpu(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
@@ -875,8 +800,6 @@ void qemu_init_vcpu(CPUState *cpu)
if (cpus_accel) {
/* accelerator already implements the CpusAccel interface */
cpus_accel->create_vcpu_thread(cpu);
- } else if (kvm_enabled()) {
- qemu_kvm_start_vcpu(cpu);
} else if (hax_enabled()) {
qemu_hax_start_vcpu(cpu);
} else if (hvf_enabled()) {
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (4 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:48 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 07/14] cpus: extract out whpx-specific " Claudio Fontana
` (8 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
register a "CpusAccel" interface for HAX as well.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
softmmu/cpus.c | 80 +-------------------------------------------
target/i386/Makefile.objs | 5 +--
target/i386/hax-all.c | 6 +++-
target/i386/hax-cpus.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++
target/i386/hax-cpus.h | 17 ++++++++++
target/i386/hax-i386.h | 2 ++
target/i386/hax-posix.c | 12 +++++++
target/i386/hax-windows.c | 20 +++++++++++
8 files changed, 145 insertions(+), 82 deletions(-)
create mode 100644 target/i386/hax-cpus.c
create mode 100644 target/i386/hax-cpus.h
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index bd535c68e0..c314e22bd2 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -33,7 +33,6 @@
#include "exec/gdbstub.h"
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
-#include "sysemu/hax.h"
#include "sysemu/hvf.h"
#include "sysemu/whpx.h"
#include "exec/exec-all.h"
@@ -179,9 +178,6 @@ void cpu_synchronize_state(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_state) {
cpus_accel->synchronize_state(cpu);
}
- if (hax_enabled()) {
- hax_cpu_synchronize_state(cpu);
- }
if (whpx_enabled()) {
whpx_cpu_synchronize_state(cpu);
}
@@ -192,9 +188,6 @@ void cpu_synchronize_post_reset(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_reset) {
cpus_accel->synchronize_post_reset(cpu);
}
- if (hax_enabled()) {
- hax_cpu_synchronize_post_reset(cpu);
- }
if (whpx_enabled()) {
whpx_cpu_synchronize_post_reset(cpu);
}
@@ -205,9 +198,6 @@ void cpu_synchronize_post_init(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_init) {
cpus_accel->synchronize_post_init(cpu);
}
- if (hax_enabled()) {
- hax_cpu_synchronize_post_init(cpu);
- }
if (whpx_enabled()) {
whpx_cpu_synchronize_post_init(cpu);
}
@@ -218,9 +208,6 @@ void cpu_synchronize_pre_loadvm(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_pre_loadvm) {
cpus_accel->synchronize_pre_loadvm(cpu);
}
- if (hax_enabled()) {
- hax_cpu_synchronize_pre_loadvm(cpu);
- }
if (hvf_enabled()) {
hvf_cpu_synchronize_pre_loadvm(cpu);
}
@@ -416,35 +403,6 @@ void qemu_wait_io_event(CPUState *cpu)
qemu_wait_io_event_common(cpu);
}
-static void *qemu_hax_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
- int r;
-
- rcu_register_thread();
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
-
- cpu->thread_id = qemu_get_thread_id();
- current_cpu = cpu;
- hax_init_vcpu(cpu);
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- do {
- if (cpu_can_run(cpu)) {
- r = hax_smp_cpu_exec(cpu);
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- }
- }
-
- qemu_wait_io_event(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
- rcu_unregister_thread();
- return NULL;
-}
-
/* The HVF-specific vCPU thread function. This one should only run when the host
* CPU supports the VMX "unrestricted guest" feature. */
static void *qemu_hvf_cpu_thread_fn(void *arg)
@@ -529,12 +487,6 @@ static void *qemu_whpx_cpu_thread_fn(void *arg)
return NULL;
}
-#ifdef _WIN32
-static void CALLBACK dummy_apc_func(ULONG_PTR unused)
-{
-}
-#endif
-
void cpus_kick_thread(CPUState *cpu)
{
#ifndef _WIN32
@@ -553,10 +505,6 @@ void cpus_kick_thread(CPUState *cpu)
if (!qemu_cpu_is_self(cpu)) {
if (whpx_enabled()) {
whpx_vcpu_kick(cpu);
- } else if (!QueueUserAPC(dummy_apc_func, cpu->hThread, 0)) {
- fprintf(stderr, "%s: QueueUserAPC failed with error %lu\n",
- __func__, GetLastError());
- exit(1);
}
}
#endif
@@ -567,14 +515,7 @@ void qemu_cpu_kick(CPUState *cpu)
qemu_cond_broadcast(cpu->halt_cond);
if (cpus_accel && cpus_accel->kick_vcpu_thread) {
cpus_accel->kick_vcpu_thread(cpu);
- } else {
- if (hax_enabled()) {
- /*
- * FIXME: race condition with the exit_request check in
- * hax_vcpu_hax_exec
- */
- cpu->exit_request = 1;
- }
+ } else { /* default */
cpus_kick_thread(cpu);
}
}
@@ -722,23 +663,6 @@ void cpu_remove_sync(CPUState *cpu)
qemu_mutex_lock_iothread();
}
-static void qemu_hax_start_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
-
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
-
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HAX",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_hax_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-#ifdef _WIN32
- cpu->hThread = qemu_thread_get_handle(cpu->thread);
-#endif
-}
-
static void qemu_hvf_start_vcpu(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
@@ -800,8 +724,6 @@ void qemu_init_vcpu(CPUState *cpu)
if (cpus_accel) {
/* accelerator already implements the CpusAccel interface */
cpus_accel->create_vcpu_thread(cpu);
- } else if (hax_enabled()) {
- qemu_hax_start_vcpu(cpu);
} else if (hvf_enabled()) {
qemu_hvf_start_vcpu(cpu);
} else if (whpx_enabled()) {
diff --git a/target/i386/Makefile.objs b/target/i386/Makefile.objs
index 0b93143e27..ee5a8fd4b4 100644
--- a/target/i386/Makefile.objs
+++ b/target/i386/Makefile.objs
@@ -10,11 +10,12 @@ obj-y += machine.o arch_memory_mapping.o arch_dump.o monitor.o
obj-$(CONFIG_KVM) += kvm.o
obj-$(CONFIG_HYPERV) += hyperv.o
obj-$(call lnot,$(CONFIG_HYPERV)) += hyperv-stub.o
+obj-$(CONFIG_HAX) += hax-all.o hax-mem.o hax-cpus.o
ifeq ($(CONFIG_WIN32),y)
-obj-$(CONFIG_HAX) += hax-all.o hax-mem.o hax-windows.o
+obj-$(CONFIG_HAX) += hax-windows.o
endif
ifeq ($(CONFIG_POSIX),y)
-obj-$(CONFIG_HAX) += hax-all.o hax-mem.o hax-posix.o
+obj-$(CONFIG_HAX) += hax-posix.o
endif
obj-$(CONFIG_HVF) += hvf/
obj-$(CONFIG_WHPX) += whpx-all.o
diff --git a/target/i386/hax-all.c b/target/i386/hax-all.c
index c93bb23a44..b66ddeb8bf 100644
--- a/target/i386/hax-all.c
+++ b/target/i386/hax-all.c
@@ -32,9 +32,10 @@
#include "sysemu/accel.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
-#include "qemu/main-loop.h"
#include "hw/boards.h"
+#include "hax-cpus.h"
+
#define DEBUG_HAX 0
#define DPRINTF(fmt, ...) \
@@ -374,6 +375,9 @@ static int hax_accel_init(MachineState *ms)
!ret ? "working" : "not working",
!ret ? "fast virt" : "emulation");
}
+ if (ret == 0) {
+ cpus_register_accel(&hax_cpus);
+ }
return ret;
}
diff --git a/target/i386/hax-cpus.c b/target/i386/hax-cpus.c
new file mode 100644
index 0000000000..69a4162939
--- /dev/null
+++ b/target/i386/hax-cpus.c
@@ -0,0 +1,85 @@
+/*
+ * QEMU HAX support
+ *
+ * Copyright IBM, Corp. 2008
+ * Red Hat, Inc. 2008
+ *
+ * Authors:
+ * Anthony Liguori <aliguori@us.ibm.com>
+ * Glauber Costa <gcosta@redhat.com>
+ *
+ * Copyright (c) 2011 Intel Corporation
+ * Written by:
+ * Jiang Yunhong<yunhong.jiang@intel.com>
+ * Xin Xiaohui<xiaohui.xin@intel.com>
+ * Zhang Xiantao<xiantao.zhang@intel.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+#include "hax-i386.h"
+#include "sysemu/runstate.h"
+#include "sysemu/cpus.h"
+#include "qemu/guest-random.h"
+
+#include "hax-cpus.h"
+
+static void *hax_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+ int r;
+
+ rcu_register_thread();
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+
+ cpu->thread_id = qemu_get_thread_id();
+ hax_init_vcpu(cpu);
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ if (cpu_can_run(cpu)) {
+ r = hax_smp_cpu_exec(cpu);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ }
+ }
+
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void hax_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HAX",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, hax_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+#ifdef _WIN32
+ cpu->hThread = qemu_thread_get_handle(cpu->thread);
+#endif
+}
+
+CpusAccel hax_cpus = {
+ .create_vcpu_thread = hax_start_vcpu_thread,
+ .kick_vcpu_thread = hax_kick_vcpu_thread,
+
+ .synchronize_post_reset = hax_cpu_synchronize_post_reset,
+ .synchronize_post_init = hax_cpu_synchronize_post_init,
+ .synchronize_state = hax_cpu_synchronize_state,
+ .synchronize_pre_loadvm = hax_cpu_synchronize_pre_loadvm,
+};
diff --git a/target/i386/hax-cpus.h b/target/i386/hax-cpus.h
new file mode 100644
index 0000000000..ac3cf1f8ae
--- /dev/null
+++ b/target/i386/hax-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HAX_CPUS_H
+#define HAX_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel hax_cpus;
+
+#endif /* HAX_CPUS_H */
diff --git a/target/i386/hax-i386.h b/target/i386/hax-i386.h
index ec28708185..48c4abe14e 100644
--- a/target/i386/hax-i386.h
+++ b/target/i386/hax-i386.h
@@ -60,6 +60,8 @@ int hax_inject_interrupt(CPUArchState *env, int vector);
struct hax_vm *hax_vm_create(struct hax_state *hax, int max_cpus);
int hax_vcpu_run(struct hax_vcpu_state *vcpu);
int hax_vcpu_create(int id);
+void hax_kick_vcpu_thread(CPUState *cpu);
+
int hax_sync_vcpu_state(CPUArchState *env, struct vcpu_state_t *state,
int set);
int hax_sync_msr(CPUArchState *env, struct hax_msr_data *msrs, int set);
diff --git a/target/i386/hax-posix.c b/target/i386/hax-posix.c
index 5f9d1b803d..6fb7867d11 100644
--- a/target/i386/hax-posix.c
+++ b/target/i386/hax-posix.c
@@ -16,6 +16,8 @@
#include "target/i386/hax-i386.h"
+#include "sysemu/cpus.h"
+
hax_fd hax_mod_open(void)
{
int fd = open("/dev/HAX", O_RDWR);
@@ -292,3 +294,13 @@ int hax_inject_interrupt(CPUArchState *env, int vector)
return ioctl(fd, HAX_VCPU_IOCTL_INTERRUPT, &vector);
}
+
+void hax_kick_vcpu_thread(CPUState *cpu)
+{
+ /*
+ * FIXME: race condition with the exit_request check in
+ * hax_vcpu_hax_exec
+ */
+ cpu->exit_request = 1;
+ cpus_kick_thread(cpu);
+}
diff --git a/target/i386/hax-windows.c b/target/i386/hax-windows.c
index 863c2bcc19..469b48e608 100644
--- a/target/i386/hax-windows.c
+++ b/target/i386/hax-windows.c
@@ -463,3 +463,23 @@ int hax_inject_interrupt(CPUArchState *env, int vector)
return 0;
}
}
+
+static void CALLBACK dummy_apc_func(ULONG_PTR unused)
+{
+}
+
+void hax_kick_vcpu_thread(CPUState *cpu)
+{
+ /*
+ * FIXME: race condition with the exit_request check in
+ * hax_vcpu_hax_exec
+ */
+ cpu->exit_request = 1;
+ if (!qemu_cpu_is_self(cpu)) {
+ if (!QueueUserAPC(dummy_apc_func, cpu->hThread, 0)) {
+ fprintf(stderr, "%s: QueueUserAPC failed with error %lu\n",
+ __func__, GetLastError());
+ exit(1);
+ }
+ }
+}
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 07/14] cpus: extract out whpx-specific code to target/i386/
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (5 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/ Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:49 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/ Claudio Fontana
` (7 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
register a "CpusAccel" interface for WHPX as well.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
MAINTAINERS | 1 +
softmmu/cpus.c | 79 --------------------------------------
target/i386/Makefile.objs | 2 +-
target/i386/whpx-all.c | 3 ++
target/i386/whpx-cpus.c | 96 +++++++++++++++++++++++++++++++++++++++++++++++
target/i386/whpx-cpus.h | 17 +++++++++
6 files changed, 118 insertions(+), 80 deletions(-)
create mode 100644 target/i386/whpx-cpus.c
create mode 100644 target/i386/whpx-cpus.h
diff --git a/MAINTAINERS b/MAINTAINERS
index f8bac8cb64..e38097a265 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -450,6 +450,7 @@ WHPX CPUs
M: Sunil Muthuswamy <sunilmut@microsoft.com>
S: Supported
F: target/i386/whpx-all.c
+F: target/i386/whpx-cpus.c
F: target/i386/whp-dispatch.h
F: accel/stubs/whpx-stub.c
F: include/sysemu/whpx.h
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index c314e22bd2..c74dae6449 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -34,7 +34,6 @@
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
#include "sysemu/hvf.h"
-#include "sysemu/whpx.h"
#include "exec/exec-all.h"
#include "qemu/thread.h"
#include "qemu/plugin.h"
@@ -178,9 +177,6 @@ void cpu_synchronize_state(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_state) {
cpus_accel->synchronize_state(cpu);
}
- if (whpx_enabled()) {
- whpx_cpu_synchronize_state(cpu);
- }
}
void cpu_synchronize_post_reset(CPUState *cpu)
@@ -188,9 +184,6 @@ void cpu_synchronize_post_reset(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_reset) {
cpus_accel->synchronize_post_reset(cpu);
}
- if (whpx_enabled()) {
- whpx_cpu_synchronize_post_reset(cpu);
- }
}
void cpu_synchronize_post_init(CPUState *cpu)
@@ -198,9 +191,6 @@ void cpu_synchronize_post_init(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_post_init) {
cpus_accel->synchronize_post_init(cpu);
}
- if (whpx_enabled()) {
- whpx_cpu_synchronize_post_init(cpu);
- }
}
void cpu_synchronize_pre_loadvm(CPUState *cpu)
@@ -211,9 +201,6 @@ void cpu_synchronize_pre_loadvm(CPUState *cpu)
if (hvf_enabled()) {
hvf_cpu_synchronize_pre_loadvm(cpu);
}
- if (whpx_enabled()) {
- whpx_cpu_synchronize_pre_loadvm(cpu);
- }
}
int64_t cpus_get_virtual_clock(void)
@@ -445,48 +432,6 @@ static void *qemu_hvf_cpu_thread_fn(void *arg)
return NULL;
}
-static void *qemu_whpx_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
- int r;
-
- rcu_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
- cpu->thread_id = qemu_get_thread_id();
- current_cpu = cpu;
-
- r = whpx_init_vcpu(cpu);
- if (r < 0) {
- fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r));
- exit(1);
- }
-
- /* signal CPU creation */
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- do {
- if (cpu_can_run(cpu)) {
- r = whpx_vcpu_exec(cpu);
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- }
- }
- while (cpu_thread_is_idle(cpu)) {
- qemu_cond_wait(cpu->halt_cond, &qemu_global_mutex);
- }
- qemu_wait_io_event_common(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
-
- whpx_destroy_vcpu(cpu);
- cpu_thread_signal_destroyed(cpu);
- qemu_mutex_unlock_iothread();
- rcu_unregister_thread();
- return NULL;
-}
-
void cpus_kick_thread(CPUState *cpu)
{
#ifndef _WIN32
@@ -501,12 +446,6 @@ void cpus_kick_thread(CPUState *cpu)
fprintf(stderr, "qemu:%s: %s", __func__, strerror(err));
exit(1);
}
-#else /* _WIN32 */
- if (!qemu_cpu_is_self(cpu)) {
- if (whpx_enabled()) {
- whpx_vcpu_kick(cpu);
- }
- }
#endif
}
@@ -681,22 +620,6 @@ static void qemu_hvf_start_vcpu(CPUState *cpu)
cpu, QEMU_THREAD_JOINABLE);
}
-static void qemu_whpx_start_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
-
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_whpx_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-#ifdef _WIN32
- cpu->hThread = qemu_thread_get_handle(cpu->thread);
-#endif
-}
-
void cpus_register_accel(CpusAccel *ca)
{
assert(ca != NULL);
@@ -726,8 +649,6 @@ void qemu_init_vcpu(CPUState *cpu)
cpus_accel->create_vcpu_thread(cpu);
} else if (hvf_enabled()) {
qemu_hvf_start_vcpu(cpu);
- } else if (whpx_enabled()) {
- qemu_whpx_start_vcpu(cpu);
} else {
assert(0);
}
diff --git a/target/i386/Makefile.objs b/target/i386/Makefile.objs
index ee5a8fd4b4..606dec67d1 100644
--- a/target/i386/Makefile.objs
+++ b/target/i386/Makefile.objs
@@ -18,7 +18,7 @@ ifeq ($(CONFIG_POSIX),y)
obj-$(CONFIG_HAX) += hax-posix.o
endif
obj-$(CONFIG_HVF) += hvf/
-obj-$(CONFIG_WHPX) += whpx-all.o
+obj-$(CONFIG_WHPX) += whpx-all.o whpx-cpus.o
endif
obj-$(CONFIG_SEV) += sev.o
obj-$(call lnot,$(CONFIG_SEV)) += sev-stub.o
diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c
index c78baac6df..8b6986c864 100644
--- a/target/i386/whpx-all.c
+++ b/target/i386/whpx-all.c
@@ -24,6 +24,8 @@
#include "migration/blocker.h"
#include "whp-dispatch.h"
+#include "whpx-cpus.h"
+
#include <WinHvPlatform.h>
#include <WinHvEmulation.h>
@@ -1575,6 +1577,7 @@ static int whpx_accel_init(MachineState *ms)
whpx_memory_init();
cpu_interrupt_handler = whpx_handle_interrupt;
+ cpus_register_accel(&whpx_cpus);
printf("Windows Hypervisor Platform accelerator is operational\n");
return 0;
diff --git a/target/i386/whpx-cpus.c b/target/i386/whpx-cpus.c
new file mode 100644
index 0000000000..3a0b69f771
--- /dev/null
+++ b/target/i386/whpx-cpus.c
@@ -0,0 +1,96 @@
+/*
+ * QEMU Windows Hypervisor Platform accelerator (WHPX)
+ *
+ * Copyright Microsoft Corp. 2017
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "sysemu/kvm_int.h"
+#include "qemu/main-loop.h"
+#include "sysemu/cpus.h"
+#include "qemu/guest-random.h"
+
+#include "sysemu/whpx.h"
+#include "whpx-cpus.h"
+
+#include <WinHvPlatform.h>
+#include <WinHvEmulation.h>
+
+static void *whpx_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+ int r;
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+ cpu->thread_id = qemu_get_thread_id();
+ current_cpu = cpu;
+
+ r = whpx_init_vcpu(cpu);
+ if (r < 0) {
+ fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ if (cpu_can_run(cpu)) {
+ r = whpx_vcpu_exec(cpu);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ }
+ }
+ while (cpu_thread_is_idle(cpu)) {
+ qemu_cond_wait_iothread(cpu->halt_cond);
+ }
+ qemu_wait_io_event_common(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+
+ whpx_destroy_vcpu(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void whpx_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+#ifdef _WIN32
+ cpu->hThread = qemu_thread_get_handle(cpu->thread);
+#endif
+}
+
+static void whpx_kick_vcpu_thread(CPUState *cpu)
+{
+ if (!qemu_cpu_is_self(cpu)) {
+ whpx_vcpu_kick(cpu);
+ }
+}
+
+CpusAccel whpx_cpus = {
+ .create_vcpu_thread = whpx_start_vcpu_thread,
+ .kick_vcpu_thread = whpx_kick_vcpu_thread,
+
+ .synchronize_post_reset = whpx_cpu_synchronize_post_reset,
+ .synchronize_post_init = whpx_cpu_synchronize_post_init,
+ .synchronize_state = whpx_cpu_synchronize_state,
+ .synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm,
+};
diff --git a/target/i386/whpx-cpus.h b/target/i386/whpx-cpus.h
new file mode 100644
index 0000000000..60b7be3735
--- /dev/null
+++ b/target/i386/whpx-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef WHPX_CPUS_H
+#define WHPX_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel whpx_cpus;
+
+#endif /* WHPX_CPUS_H */
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (6 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 07/14] cpus: extract out whpx-specific " Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:51 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 09/14] cpus: cleanup now unneeded includes Claudio Fontana
` (6 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
register a "CpusAccel" interface for HVF as well.
Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
---
softmmu/cpus.c | 66 ---------------------
target/i386/hvf/Makefile.objs | 2 +-
target/i386/hvf/hvf-cpus.c | 131 ++++++++++++++++++++++++++++++++++++++++++
target/i386/hvf/hvf-cpus.h | 17 ++++++
target/i386/hvf/hvf.c | 3 +
5 files changed, 152 insertions(+), 67 deletions(-)
create mode 100644 target/i386/hvf/hvf-cpus.c
create mode 100644 target/i386/hvf/hvf-cpus.h
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index c74dae6449..f99942fd9d 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -33,7 +33,6 @@
#include "exec/gdbstub.h"
#include "sysemu/hw_accel.h"
#include "sysemu/kvm.h"
-#include "sysemu/hvf.h"
#include "exec/exec-all.h"
#include "qemu/thread.h"
#include "qemu/plugin.h"
@@ -198,9 +197,6 @@ void cpu_synchronize_pre_loadvm(CPUState *cpu)
if (cpus_accel && cpus_accel->synchronize_pre_loadvm) {
cpus_accel->synchronize_pre_loadvm(cpu);
}
- if (hvf_enabled()) {
- hvf_cpu_synchronize_pre_loadvm(cpu);
- }
}
int64_t cpus_get_virtual_clock(void)
@@ -390,48 +386,6 @@ void qemu_wait_io_event(CPUState *cpu)
qemu_wait_io_event_common(cpu);
}
-/* The HVF-specific vCPU thread function. This one should only run when the host
- * CPU supports the VMX "unrestricted guest" feature. */
-static void *qemu_hvf_cpu_thread_fn(void *arg)
-{
- CPUState *cpu = arg;
-
- int r;
-
- assert(hvf_enabled());
-
- rcu_register_thread();
-
- qemu_mutex_lock_iothread();
- qemu_thread_get_self(cpu->thread);
-
- cpu->thread_id = qemu_get_thread_id();
- cpu->can_do_io = 1;
- current_cpu = cpu;
-
- hvf_init_vcpu(cpu);
-
- /* signal CPU creation */
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
-
- do {
- if (cpu_can_run(cpu)) {
- r = hvf_vcpu_exec(cpu);
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- }
- }
- qemu_wait_io_event(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
-
- hvf_vcpu_destroy(cpu);
- cpu_thread_signal_destroyed(cpu);
- qemu_mutex_unlock_iothread();
- rcu_unregister_thread();
- return NULL;
-}
-
void cpus_kick_thread(CPUState *cpu)
{
#ifndef _WIN32
@@ -602,24 +556,6 @@ void cpu_remove_sync(CPUState *cpu)
qemu_mutex_lock_iothread();
}
-static void qemu_hvf_start_vcpu(CPUState *cpu)
-{
- char thread_name[VCPU_THREAD_NAME_SIZE];
-
- /* HVF currently does not support TCG, and only runs in
- * unrestricted-guest mode. */
- assert(hvf_enabled());
-
- cpu->thread = g_malloc0(sizeof(QemuThread));
- cpu->halt_cond = g_malloc0(sizeof(QemuCond));
- qemu_cond_init(cpu->halt_cond);
-
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, qemu_hvf_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
-}
-
void cpus_register_accel(CpusAccel *ca)
{
assert(ca != NULL);
@@ -647,8 +583,6 @@ void qemu_init_vcpu(CPUState *cpu)
if (cpus_accel) {
/* accelerator already implements the CpusAccel interface */
cpus_accel->create_vcpu_thread(cpu);
- } else if (hvf_enabled()) {
- qemu_hvf_start_vcpu(cpu);
} else {
assert(0);
}
diff --git a/target/i386/hvf/Makefile.objs b/target/i386/hvf/Makefile.objs
index 927b86bc67..af9f7dcfc1 100644
--- a/target/i386/hvf/Makefile.objs
+++ b/target/i386/hvf/Makefile.objs
@@ -1,2 +1,2 @@
-obj-y += hvf.o
+obj-y += hvf.o hvf-cpus.o
obj-y += x86.o x86_cpuid.o x86_decode.o x86_descr.o x86_emu.o x86_flags.o x86_mmu.o x86hvf.o x86_task.o
diff --git a/target/i386/hvf/hvf-cpus.c b/target/i386/hvf/hvf-cpus.c
new file mode 100644
index 0000000000..9540157f1e
--- /dev/null
+++ b/target/i386/hvf/hvf-cpus.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2008 IBM Corporation
+ * 2008 Red Hat, Inc.
+ * Copyright 2011 Intel Corporation
+ * Copyright 2016 Veertu, Inc.
+ * Copyright 2017 The Android Open Source Project
+ *
+ * QEMU Hypervisor.framework support
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * This file contain code under public domain from the hvdos project:
+ * https://github.com/mist64/hvdos
+ *
+ * Parts Copyright (c) 2011 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/error-report.h"
+#include "qemu/main-loop.h"
+#include "sysemu/hvf.h"
+#include "sysemu/runstate.h"
+#include "target/i386/cpu.h"
+#include "qemu/guest-random.h"
+
+#include "hvf-cpus.h"
+
+/*
+ * The HVF-specific vCPU thread function. This one should only run when the host
+ * CPU supports the VMX "unrestricted guest" feature.
+ */
+static void *hvf_cpu_thread_fn(void *arg)
+{
+ CPUState *cpu = arg;
+
+ int r;
+
+ assert(hvf_enabled());
+
+ rcu_register_thread();
+
+ qemu_mutex_lock_iothread();
+ qemu_thread_get_self(cpu->thread);
+
+ cpu->thread_id = qemu_get_thread_id();
+ cpu->can_do_io = 1;
+ current_cpu = cpu;
+
+ hvf_init_vcpu(cpu);
+
+ /* signal CPU creation */
+ cpu_thread_signal_created(cpu);
+ qemu_guest_random_seed_thread_part2(cpu->random_seed);
+
+ do {
+ if (cpu_can_run(cpu)) {
+ r = hvf_vcpu_exec(cpu);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_guest_debug(cpu);
+ }
+ }
+ qemu_wait_io_event(cpu);
+ } while (!cpu->unplug || cpu_can_run(cpu));
+
+ hvf_vcpu_destroy(cpu);
+ cpu_thread_signal_destroyed(cpu);
+ qemu_mutex_unlock_iothread();
+ rcu_unregister_thread();
+ return NULL;
+}
+
+static void hvf_start_vcpu_thread(CPUState *cpu)
+{
+ char thread_name[VCPU_THREAD_NAME_SIZE];
+
+ /*
+ * HVF currently does not support TCG, and only runs in
+ * unrestricted-guest mode.
+ */
+ assert(hvf_enabled());
+
+ cpu->thread = g_malloc0(sizeof(QemuThread));
+ cpu->halt_cond = g_malloc0(sizeof(QemuCond));
+ qemu_cond_init(cpu->halt_cond);
+
+ snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/HVF",
+ cpu->cpu_index);
+ qemu_thread_create(cpu->thread, thread_name, hvf_cpu_thread_fn,
+ cpu, QEMU_THREAD_JOINABLE);
+}
+
+CpusAccel hvf_cpus = {
+ .create_vcpu_thread = hvf_start_vcpu_thread,
+
+ .synchronize_post_reset = hvf_cpu_synchronize_post_reset,
+ .synchronize_post_init = hvf_cpu_synchronize_post_init,
+ .synchronize_state = hvf_cpu_synchronize_state,
+ .synchronize_pre_loadvm = hvf_cpu_synchronize_pre_loadvm,
+};
diff --git a/target/i386/hvf/hvf-cpus.h b/target/i386/hvf/hvf-cpus.h
new file mode 100644
index 0000000000..b66f4889b0
--- /dev/null
+++ b/target/i386/hvf/hvf-cpus.h
@@ -0,0 +1,17 @@
+/*
+ * Accelerator CPUS Interface
+ *
+ * Copyright 2020 SUSE LLC
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef HVF_CPUS_H
+#define HVF_CPUS_H
+
+#include "sysemu/cpus.h"
+
+extern CpusAccel hvf_cpus;
+
+#endif /* HVF_CPUS_H */
diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
index d81f569aed..7ac6987c1b 100644
--- a/target/i386/hvf/hvf.c
+++ b/target/i386/hvf/hvf.c
@@ -72,6 +72,8 @@
#include "sysemu/accel.h"
#include "target/i386/cpu.h"
+#include "hvf-cpus.h"
+
HVFState *hvf_state;
static void assert_hvf_ok(hv_return_t ret)
@@ -894,6 +896,7 @@ static int hvf_accel_init(MachineState *ms)
hvf_state = s;
cpu_interrupt_handler = hvf_handle_interrupt;
memory_listener_register(&hvf_memory_listener, &address_space_memory);
+ cpus_register_accel(&hvf_cpus);
return 0;
}
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 09/14] cpus: cleanup now unneeded includes
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (7 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/ Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 20:51 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface Claudio Fontana
` (5 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
softmmu/cpus.c | 7 -------
1 file changed, 7 deletions(-)
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index f99942fd9d..1125fb5fc9 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -29,20 +29,13 @@
#include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-events-run-state.h"
#include "qapi/qmp/qerror.h"
-#include "sysemu/tcg.h"
#include "exec/gdbstub.h"
#include "sysemu/hw_accel.h"
-#include "sysemu/kvm.h"
#include "exec/exec-all.h"
#include "qemu/thread.h"
#include "qemu/plugin.h"
#include "sysemu/cpus.h"
-#include "qemu/main-loop.h"
-#include "qemu/option.h"
-#include "qemu/bitmap.h"
-#include "qemu/seqlock.h"
#include "qemu/guest-random.h"
-#include "tcg/tcg.h"
#include "hw/nmi.h"
#include "sysemu/replay.h"
#include "sysemu/runstate.h"
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (8 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 09/14] cpus: cleanup now unneeded includes Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 21:01 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 11/14] hvf: remove hvf specific functions from global includes Claudio Fontana
` (4 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
kvm: uses the generic handler
qtest: uses the generic handler
whpx: changed to use the generic handler (identical implementation)
hax: changed to use the generic handler (identical implementation)
hvf: changed to use the generic handler (identical implementation)
tcg: adapt tcg-cpus to point to the tcg-specific handler
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
accel/tcg/tcg-all.c | 26 --------------------------
accel/tcg/tcg-cpus.c | 28 ++++++++++++++++++++++++++++
hw/core/cpu.c | 13 -------------
include/hw/core/cpu.h | 14 --------------
include/sysemu/cpus.h | 2 ++
softmmu/cpus.c | 18 ++++++++++++++++++
target/i386/hax-all.c | 10 ----------
target/i386/hvf/hvf.c | 9 ---------
target/i386/whpx-all.c | 10 ----------
9 files changed, 48 insertions(+), 82 deletions(-)
diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c
index 01957b130d..af9bf5c5bb 100644
--- a/accel/tcg/tcg-all.c
+++ b/accel/tcg/tcg-all.c
@@ -47,31 +47,6 @@ typedef struct TCGState {
#define TCG_STATE(obj) \
OBJECT_CHECK(TCGState, (obj), TYPE_TCG_ACCEL)
-/* mask must never be zero, except for A20 change call */
-static void tcg_handle_interrupt(CPUState *cpu, int mask)
-{
- int old_mask;
- g_assert(qemu_mutex_iothread_locked());
-
- old_mask = cpu->interrupt_request;
- cpu->interrupt_request |= mask;
-
- /*
- * If called from iothread context, wake the target cpu in
- * case its halted.
- */
- if (!qemu_cpu_is_self(cpu)) {
- qemu_cpu_kick(cpu);
- } else {
- atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
- if (icount_enabled() &&
- !cpu->can_do_io
- && (mask & ~old_mask) != 0) {
- cpu_abort(cpu, "Raised interrupt while not in I/O function");
- }
- }
-}
-
/*
* We default to false if we know other options have been enabled
* which are currently incompatible with MTTCG. Otherwise when each
@@ -128,7 +103,6 @@ static int tcg_init(MachineState *ms)
TCGState *s = TCG_STATE(current_accel());
tcg_exec_init(s->tb_size * 1024 * 1024);
- cpu_interrupt_handler = tcg_handle_interrupt;
mttcg_enabled = s->mttcg_enabled;
cpus_register_accel(&tcg_cpus);
diff --git a/accel/tcg/tcg-cpus.c b/accel/tcg/tcg-cpus.c
index c82d142523..465d9955de 100644
--- a/accel/tcg/tcg-cpus.c
+++ b/accel/tcg/tcg-cpus.c
@@ -533,9 +533,37 @@ static int64_t tcg_get_elapsed_ticks(void)
return cpu_get_ticks();
}
+/* mask must never be zero, except for A20 change call */
+static void tcg_handle_interrupt(CPUState *cpu, int mask)
+{
+ int old_mask;
+ g_assert(qemu_mutex_iothread_locked());
+
+ old_mask = cpu->interrupt_request;
+ cpu->interrupt_request |= mask;
+
+ /*
+ * If called from iothread context, wake the target cpu in
+ * case its halted.
+ */
+ if (!qemu_cpu_is_self(cpu)) {
+ qemu_cpu_kick(cpu);
+ } else {
+ atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
+ if (icount_enabled() &&
+ !cpu->can_do_io
+ && (mask & ~old_mask) != 0) {
+ cpu_abort(cpu, "Raised interrupt while not in I/O function");
+ }
+ }
+}
+
CpusAccel tcg_cpus = {
.create_vcpu_thread = tcg_start_vcpu_thread,
.kick_vcpu_thread = tcg_kick_vcpu_thread,
+
+ .handle_interrupt = tcg_handle_interrupt,
+
.get_virtual_clock = tcg_get_virtual_clock,
.get_elapsed_ticks = tcg_get_elapsed_ticks,
};
diff --git a/hw/core/cpu.c b/hw/core/cpu.c
index b389a312df..06bec40042 100644
--- a/hw/core/cpu.c
+++ b/hw/core/cpu.c
@@ -35,8 +35,6 @@
#include "qemu/plugin.h"
#include "sysemu/hw_accel.h"
-CPUInterruptHandler cpu_interrupt_handler;
-
CPUState *cpu_by_arch_id(int64_t id)
{
CPUState *cpu;
@@ -394,17 +392,6 @@ static vaddr cpu_adjust_watchpoint_address(CPUState *cpu, vaddr addr, int len)
return addr;
}
-static void generic_handle_interrupt(CPUState *cpu, int mask)
-{
- cpu->interrupt_request |= mask;
-
- if (!qemu_cpu_is_self(cpu)) {
- qemu_cpu_kick(cpu);
- }
-}
-
-CPUInterruptHandler cpu_interrupt_handler = generic_handle_interrupt;
-
static void cpu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 8f145733ce..efd33d87fd 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -838,12 +838,6 @@ bool cpu_exists(int64_t id);
*/
CPUState *cpu_by_arch_id(int64_t id);
-#ifndef CONFIG_USER_ONLY
-
-typedef void (*CPUInterruptHandler)(CPUState *, int);
-
-extern CPUInterruptHandler cpu_interrupt_handler;
-
/**
* cpu_interrupt:
* @cpu: The CPU to set an interrupt on.
@@ -851,17 +845,9 @@ extern CPUInterruptHandler cpu_interrupt_handler;
*
* Invokes the interrupt handler.
*/
-static inline void cpu_interrupt(CPUState *cpu, int mask)
-{
- cpu_interrupt_handler(cpu, mask);
-}
-
-#else /* USER_ONLY */
void cpu_interrupt(CPUState *cpu, int mask);
-#endif /* USER_ONLY */
-
#ifdef NEED_CPU_H
#ifdef CONFIG_SOFTMMU
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index db196dd96f..11ac0387e6 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -16,6 +16,8 @@ typedef struct CpusAccel {
void (*synchronize_state)(CPUState *cpu);
void (*synchronize_pre_loadvm)(CPUState *cpu);
+ void (*handle_interrupt)(CPUState *cpu, int mask);
+
int64_t (*get_virtual_clock)(void);
int64_t (*get_elapsed_ticks)(void);
} CpusAccel;
diff --git a/softmmu/cpus.c b/softmmu/cpus.c
index 1125fb5fc9..17531161fc 100644
--- a/softmmu/cpus.c
+++ b/softmmu/cpus.c
@@ -213,6 +213,24 @@ int64_t cpus_get_elapsed_ticks(void)
return cpu_get_ticks();
}
+static void generic_handle_interrupt(CPUState *cpu, int mask)
+{
+ cpu->interrupt_request |= mask;
+
+ if (!qemu_cpu_is_self(cpu)) {
+ qemu_cpu_kick(cpu);
+ }
+}
+
+void cpu_interrupt(CPUState *cpu, int mask)
+{
+ if (cpus_accel && cpus_accel->handle_interrupt) {
+ cpus_accel->handle_interrupt(cpu, mask);
+ } else {
+ generic_handle_interrupt(cpu, mask);
+ }
+}
+
static int do_vm_stop(RunState state, bool send_stop)
{
int ret = 0;
diff --git a/target/i386/hax-all.c b/target/i386/hax-all.c
index b66ddeb8bf..fd1ab673d7 100644
--- a/target/i386/hax-all.c
+++ b/target/i386/hax-all.c
@@ -297,15 +297,6 @@ int hax_vm_destroy(struct hax_vm *vm)
return 0;
}
-static void hax_handle_interrupt(CPUState *cpu, int mask)
-{
- cpu->interrupt_request |= mask;
-
- if (!qemu_cpu_is_self(cpu)) {
- qemu_cpu_kick(cpu);
- }
-}
-
static int hax_init(ram_addr_t ram_size, int max_cpus)
{
struct hax_state *hax = NULL;
@@ -350,7 +341,6 @@ static int hax_init(ram_addr_t ram_size, int max_cpus)
qversion.cur_version = hax_cur_version;
qversion.min_version = hax_min_version;
hax_notify_qemu_version(hax->vm->fd, &qversion);
- cpu_interrupt_handler = hax_handle_interrupt;
return ret;
error:
diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
index 7ac6987c1b..ed9356565c 100644
--- a/target/i386/hvf/hvf.c
+++ b/target/i386/hvf/hvf.c
@@ -262,14 +262,6 @@ static void update_apic_tpr(CPUState *cpu)
#define VECTORING_INFO_VECTOR_MASK 0xff
-static void hvf_handle_interrupt(CPUState * cpu, int mask)
-{
- cpu->interrupt_request |= mask;
- if (!qemu_cpu_is_self(cpu)) {
- qemu_cpu_kick(cpu);
- }
-}
-
void hvf_handle_io(CPUArchState *env, uint16_t port, void *buffer,
int direction, int size, int count)
{
@@ -894,7 +886,6 @@ static int hvf_accel_init(MachineState *ms)
}
hvf_state = s;
- cpu_interrupt_handler = hvf_handle_interrupt;
memory_listener_register(&hvf_memory_listener, &address_space_memory);
cpus_register_accel(&hvf_cpus);
return 0;
diff --git a/target/i386/whpx-all.c b/target/i386/whpx-all.c
index 8b6986c864..b3d17fbe04 100644
--- a/target/i386/whpx-all.c
+++ b/target/i386/whpx-all.c
@@ -1413,15 +1413,6 @@ static void whpx_memory_init(void)
memory_listener_register(&whpx_memory_listener, &address_space_memory);
}
-static void whpx_handle_interrupt(CPUState *cpu, int mask)
-{
- cpu->interrupt_request |= mask;
-
- if (!qemu_cpu_is_self(cpu)) {
- qemu_cpu_kick(cpu);
- }
-}
-
/*
* Load the functions from the given library, using the given handle. If a
* handle is provided, it is used, otherwise the library is opened. The
@@ -1576,7 +1567,6 @@ static int whpx_accel_init(MachineState *ms)
whpx_memory_init();
- cpu_interrupt_handler = whpx_handle_interrupt;
cpus_register_accel(&whpx_cpus);
printf("Windows Hypervisor Platform accelerator is operational\n");
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 11/14] hvf: remove hvf specific functions from global includes
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (9 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 21:02 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 12/14] whpx: remove whpx " Claudio Fontana
` (3 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
accel/stubs/Makefile.objs | 1 -
accel/stubs/hvf-stub.c | 30 ------------------------------
include/sysemu/hvf.h | 8 --------
target/i386/hvf/hvf-cpus.h | 8 ++++++++
target/i386/hvf/x86hvf.c | 2 ++
target/i386/hvf/x86hvf.h | 1 -
6 files changed, 10 insertions(+), 40 deletions(-)
delete mode 100644 accel/stubs/hvf-stub.c
diff --git a/accel/stubs/Makefile.objs b/accel/stubs/Makefile.objs
index bbd14e71fb..6630954f30 100644
--- a/accel/stubs/Makefile.objs
+++ b/accel/stubs/Makefile.objs
@@ -1,5 +1,4 @@
obj-$(call lnot,$(CONFIG_HAX)) += hax-stub.o
-obj-$(call lnot,$(CONFIG_HVF)) += hvf-stub.o
obj-$(call lnot,$(CONFIG_WHPX)) += whpx-stub.o
obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
obj-$(call lnot,$(CONFIG_TCG)) += tcg-stub.o
diff --git a/accel/stubs/hvf-stub.c b/accel/stubs/hvf-stub.c
deleted file mode 100644
index e81dfe888c..0000000000
--- a/accel/stubs/hvf-stub.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * QEMU HVF support
- *
- * Copyright 2017 Red Hat, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2 or later, as published by the Free Software Foundation,
- * and may be copied, distributed, and modified under those terms.
- *
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include "cpu.h"
-#include "sysemu/hvf.h"
-
-int hvf_init_vcpu(CPUState *cpu)
-{
- return -ENOSYS;
-}
-
-int hvf_vcpu_exec(CPUState *cpu)
-{
- return -ENOSYS;
-}
-
-void hvf_vcpu_destroy(CPUState *cpu)
-{
-}
diff --git a/include/sysemu/hvf.h b/include/sysemu/hvf.h
index 6d3ee4fdb7..b4f7191dd9 100644
--- a/include/sysemu/hvf.h
+++ b/include/sysemu/hvf.h
@@ -23,14 +23,6 @@ extern bool hvf_allowed;
#define hvf_get_supported_cpuid(func, idx, reg) 0
#endif /* !CONFIG_HVF */
-int hvf_init_vcpu(CPUState *);
-int hvf_vcpu_exec(CPUState *);
-void hvf_cpu_synchronize_state(CPUState *);
-void hvf_cpu_synchronize_post_reset(CPUState *);
-void hvf_cpu_synchronize_post_init(CPUState *);
-void hvf_cpu_synchronize_pre_loadvm(CPUState *);
-void hvf_vcpu_destroy(CPUState *);
-
#define TYPE_HVF_ACCEL ACCEL_CLASS_NAME("hvf")
#define HVF_STATE(obj) \
diff --git a/target/i386/hvf/hvf-cpus.h b/target/i386/hvf/hvf-cpus.h
index b66f4889b0..da4a990451 100644
--- a/target/i386/hvf/hvf-cpus.h
+++ b/target/i386/hvf/hvf-cpus.h
@@ -14,4 +14,12 @@
extern CpusAccel hvf_cpus;
+int hvf_init_vcpu(CPUState *);
+int hvf_vcpu_exec(CPUState *);
+void hvf_cpu_synchronize_state(CPUState *);
+void hvf_cpu_synchronize_post_reset(CPUState *);
+void hvf_cpu_synchronize_post_init(CPUState *);
+void hvf_cpu_synchronize_pre_loadvm(CPUState *);
+void hvf_vcpu_destroy(CPUState *);
+
#endif /* HVF_CPUS_H */
diff --git a/target/i386/hvf/x86hvf.c b/target/i386/hvf/x86hvf.c
index 5cbcb32ab6..b986213c0f 100644
--- a/target/i386/hvf/x86hvf.c
+++ b/target/i386/hvf/x86hvf.c
@@ -32,6 +32,8 @@
#include <Hypervisor/hv.h>
#include <Hypervisor/hv_vmx.h>
+#include "hvf-cpus.h"
+
void hvf_set_segment(struct CPUState *cpu, struct vmx_segment *vmx_seg,
SegmentCache *qseg, bool is_tr)
{
diff --git a/target/i386/hvf/x86hvf.h b/target/i386/hvf/x86hvf.h
index 79539f7282..4fabc6d582 100644
--- a/target/i386/hvf/x86hvf.h
+++ b/target/i386/hvf/x86hvf.h
@@ -35,5 +35,4 @@ void hvf_get_msrs(CPUState *cpu_state);
void vmx_clear_int_window_exiting(CPUState *cpu);
void hvf_get_segments(CPUState *cpu_state);
void vmx_update_tpr(CPUState *cpu);
-void hvf_cpu_synchronize_state(CPUState *cpu_state);
#endif
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 12/14] whpx: remove whpx specific functions from global includes
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (10 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 11/14] hvf: remove hvf specific functions from global includes Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 21:03 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 13/14] hax: remove hax " Claudio Fontana
` (2 subsequent siblings)
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
accel/stubs/Makefile.objs | 1 -
accel/stubs/whpx-stub.c | 47 -----------------------------------------------
include/sysemu/whpx.h | 19 -------------------
target/i386/whpx-cpus.h | 17 +++++++++++++++++
4 files changed, 17 insertions(+), 67 deletions(-)
delete mode 100644 accel/stubs/whpx-stub.c
diff --git a/accel/stubs/Makefile.objs b/accel/stubs/Makefile.objs
index 6630954f30..3c2a2fedc4 100644
--- a/accel/stubs/Makefile.objs
+++ b/accel/stubs/Makefile.objs
@@ -1,5 +1,4 @@
obj-$(call lnot,$(CONFIG_HAX)) += hax-stub.o
-obj-$(call lnot,$(CONFIG_WHPX)) += whpx-stub.o
obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o
obj-$(call lnot,$(CONFIG_TCG)) += tcg-stub.o
obj-$(call lnot,$(CONFIG_XEN)) += xen-stub.o
diff --git a/accel/stubs/whpx-stub.c b/accel/stubs/whpx-stub.c
deleted file mode 100644
index 1efb89f25e..0000000000
--- a/accel/stubs/whpx-stub.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * QEMU Windows Hypervisor Platform accelerator (WHPX) stub
- *
- * Copyright Microsoft Corp. 2017
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
-
-#include "qemu/osdep.h"
-#include "cpu.h"
-#include "sysemu/whpx.h"
-
-int whpx_init_vcpu(CPUState *cpu)
-{
- return -1;
-}
-
-int whpx_vcpu_exec(CPUState *cpu)
-{
- return -1;
-}
-
-void whpx_destroy_vcpu(CPUState *cpu)
-{
-}
-
-void whpx_vcpu_kick(CPUState *cpu)
-{
-}
-
-void whpx_cpu_synchronize_state(CPUState *cpu)
-{
-}
-
-void whpx_cpu_synchronize_post_reset(CPUState *cpu)
-{
-}
-
-void whpx_cpu_synchronize_post_init(CPUState *cpu)
-{
-}
-
-void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu)
-{
-}
diff --git a/include/sysemu/whpx.h b/include/sysemu/whpx.h
index a84b49e749..59edf13742 100644
--- a/include/sysemu/whpx.h
+++ b/include/sysemu/whpx.h
@@ -13,18 +13,6 @@
#ifndef QEMU_WHPX_H
#define QEMU_WHPX_H
-
-int whpx_init_vcpu(CPUState *cpu);
-int whpx_vcpu_exec(CPUState *cpu);
-void whpx_destroy_vcpu(CPUState *cpu);
-void whpx_vcpu_kick(CPUState *cpu);
-
-
-void whpx_cpu_synchronize_state(CPUState *cpu);
-void whpx_cpu_synchronize_post_reset(CPUState *cpu);
-void whpx_cpu_synchronize_post_init(CPUState *cpu);
-void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu);
-
#ifdef CONFIG_WHPX
int whpx_enabled(void);
@@ -35,11 +23,4 @@ int whpx_enabled(void);
#endif /* CONFIG_WHPX */
-/* state subset only touched by the VCPU itself during runtime */
-#define WHPX_SET_RUNTIME_STATE 1
-/* state subset modified during VCPU reset */
-#define WHPX_SET_RESET_STATE 2
-/* full state set, modified during initialization or on vmload */
-#define WHPX_SET_FULL_STATE 3
-
#endif /* QEMU_WHPX_H */
diff --git a/target/i386/whpx-cpus.h b/target/i386/whpx-cpus.h
index 60b7be3735..165e721589 100644
--- a/target/i386/whpx-cpus.h
+++ b/target/i386/whpx-cpus.h
@@ -14,4 +14,21 @@
extern CpusAccel whpx_cpus;
+int whpx_init_vcpu(CPUState *cpu);
+int whpx_vcpu_exec(CPUState *cpu);
+void whpx_destroy_vcpu(CPUState *cpu);
+void whpx_vcpu_kick(CPUState *cpu);
+
+void whpx_cpu_synchronize_state(CPUState *cpu);
+void whpx_cpu_synchronize_post_reset(CPUState *cpu);
+void whpx_cpu_synchronize_post_init(CPUState *cpu);
+void whpx_cpu_synchronize_pre_loadvm(CPUState *cpu);
+
+/* state subset only touched by the VCPU itself during runtime */
+#define WHPX_SET_RUNTIME_STATE 1
+/* state subset modified during VCPU reset */
+#define WHPX_SET_RESET_STATE 2
+/* full state set, modified during initialization or on vmload */
+#define WHPX_SET_FULL_STATE 3
+
#endif /* WHPX_CPUS_H */
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 13/14] hax: remove hax specific functions from global includes
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (11 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 12/14] whpx: remove whpx " Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 21:06 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 14/14] kvm: remove kvm " Claudio Fontana
2020-08-13 14:16 ` [PATCH v5 00/14] QEMU cpus.c refactoring part2 no-reply
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
accel/stubs/hax-stub.c | 10 ----------
include/sysemu/hax.h | 17 -----------------
target/i386/hax-all.c | 1 -
target/i386/hax-cpus.c | 1 -
target/i386/hax-cpus.h | 16 ++++++++++++++++
target/i386/hax-mem.c | 2 +-
target/i386/hax-posix.c | 3 +--
target/i386/hax-windows.c | 2 +-
target/i386/hax-windows.h | 2 ++
9 files changed, 21 insertions(+), 33 deletions(-)
diff --git a/accel/stubs/hax-stub.c b/accel/stubs/hax-stub.c
index 7ad190cae2..1a9da83185 100644
--- a/accel/stubs/hax-stub.c
+++ b/accel/stubs/hax-stub.c
@@ -21,13 +21,3 @@ int hax_sync_vcpus(void)
{
return 0;
}
-
-int hax_init_vcpu(CPUState *cpu)
-{
- return -ENOSYS;
-}
-
-int hax_smp_cpu_exec(CPUState *cpu)
-{
- return -ENOSYS;
-}
diff --git a/include/sysemu/hax.h b/include/sysemu/hax.h
index 9b27e65cc7..12fb54f990 100644
--- a/include/sysemu/hax.h
+++ b/include/sysemu/hax.h
@@ -22,29 +22,12 @@
#ifndef QEMU_HAX_H
#define QEMU_HAX_H
-
int hax_sync_vcpus(void);
-int hax_init_vcpu(CPUState *cpu);
-int hax_smp_cpu_exec(CPUState *cpu);
-int hax_populate_ram(uint64_t va, uint64_t size);
-
-void hax_cpu_synchronize_state(CPUState *cpu);
-void hax_cpu_synchronize_post_reset(CPUState *cpu);
-void hax_cpu_synchronize_post_init(CPUState *cpu);
-void hax_cpu_synchronize_pre_loadvm(CPUState *cpu);
#ifdef CONFIG_HAX
int hax_enabled(void);
-#include "qemu/bitops.h"
-#include "exec/memory.h"
-int hax_vcpu_destroy(CPUState *cpu);
-void hax_raise_event(CPUState *cpu);
-void hax_reset_vcpu_state(void *opaque);
-#include "target/i386/hax-interface.h"
-#include "target/i386/hax-i386.h"
-
#else /* CONFIG_HAX */
#define hax_enabled() (0)
diff --git a/target/i386/hax-all.c b/target/i386/hax-all.c
index fd1ab673d7..fecfe8cd6e 100644
--- a/target/i386/hax-all.c
+++ b/target/i386/hax-all.c
@@ -28,7 +28,6 @@
#include "exec/address-spaces.h"
#include "qemu-common.h"
-#include "hax-i386.h"
#include "sysemu/accel.h"
#include "sysemu/reset.h"
#include "sysemu/runstate.h"
diff --git a/target/i386/hax-cpus.c b/target/i386/hax-cpus.c
index 69a4162939..e89658ea33 100644
--- a/target/i386/hax-cpus.c
+++ b/target/i386/hax-cpus.c
@@ -22,7 +22,6 @@
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "qemu/main-loop.h"
-#include "hax-i386.h"
#include "sysemu/runstate.h"
#include "sysemu/cpus.h"
#include "qemu/guest-random.h"
diff --git a/target/i386/hax-cpus.h b/target/i386/hax-cpus.h
index ac3cf1f8ae..91937c8527 100644
--- a/target/i386/hax-cpus.h
+++ b/target/i386/hax-cpus.h
@@ -14,4 +14,20 @@
extern CpusAccel hax_cpus;
+#include "hax-interface.h"
+#include "hax-i386.h"
+
+int hax_init_vcpu(CPUState *cpu);
+int hax_smp_cpu_exec(CPUState *cpu);
+int hax_populate_ram(uint64_t va, uint64_t size);
+
+void hax_cpu_synchronize_state(CPUState *cpu);
+void hax_cpu_synchronize_post_reset(CPUState *cpu);
+void hax_cpu_synchronize_post_init(CPUState *cpu);
+void hax_cpu_synchronize_pre_loadvm(CPUState *cpu);
+
+int hax_vcpu_destroy(CPUState *cpu);
+void hax_raise_event(CPUState *cpu);
+void hax_reset_vcpu_state(void *opaque);
+
#endif /* HAX_CPUS_H */
diff --git a/target/i386/hax-mem.c b/target/i386/hax-mem.c
index 6bb5a24917..71e637cf16 100644
--- a/target/i386/hax-mem.c
+++ b/target/i386/hax-mem.c
@@ -13,7 +13,7 @@
#include "exec/address-spaces.h"
#include "qemu/error-report.h"
-#include "target/i386/hax-i386.h"
+#include "hax-cpus.h"
#include "qemu/queue.h"
#define DEBUG_HAX_MEM 0
diff --git a/target/i386/hax-posix.c b/target/i386/hax-posix.c
index 6fb7867d11..735a749d4b 100644
--- a/target/i386/hax-posix.c
+++ b/target/i386/hax-posix.c
@@ -14,9 +14,8 @@
#include "qemu/osdep.h"
#include <sys/ioctl.h>
-#include "target/i386/hax-i386.h"
-
#include "sysemu/cpus.h"
+#include "hax-cpus.h"
hax_fd hax_mod_open(void)
{
diff --git a/target/i386/hax-windows.c b/target/i386/hax-windows.c
index 469b48e608..6c82dfb54f 100644
--- a/target/i386/hax-windows.c
+++ b/target/i386/hax-windows.c
@@ -12,7 +12,7 @@
#include "qemu/osdep.h"
#include "cpu.h"
-#include "hax-i386.h"
+#include "hax-cpus.h"
/*
* return 0 when success, -1 when driver not loaded,
diff --git a/target/i386/hax-windows.h b/target/i386/hax-windows.h
index 12cbd813dc..a5ce12d663 100644
--- a/target/i386/hax-windows.h
+++ b/target/i386/hax-windows.h
@@ -23,6 +23,8 @@
#include <winioctl.h>
#include <windef.h>
+#include "hax-cpus.h"
+
#define HAX_INVALID_FD INVALID_HANDLE_VALUE
static inline void hax_mod_close(struct hax_state *hax)
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* [PATCH v5 14/14] kvm: remove kvm specific functions from global includes
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (12 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 13/14] hax: remove hax " Claudio Fontana
@ 2020-08-12 18:32 ` Claudio Fontana
2020-08-14 21:07 ` Richard Henderson
2020-08-13 14:16 ` [PATCH v5 00/14] QEMU cpus.c refactoring part2 no-reply
14 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-12 18:32 UTC (permalink / raw)
To: Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Pavel Dovgalyuk,
Marcelo Tosatti, qemu-devel, Markus Armbruster, Wenchao Wang,
Colin Xu, Claudio Fontana, haxm-team, Sunil Muthuswamy,
Richard Henderson
Signed-off-by: Claudio Fontana <cfontana@suse.de>
---
accel/kvm/kvm-cpus.h | 7 +++++++
accel/stubs/kvm-stub.c | 22 ----------------------
include/sysemu/kvm.h | 7 -------
3 files changed, 7 insertions(+), 29 deletions(-)
diff --git a/accel/kvm/kvm-cpus.h b/accel/kvm/kvm-cpus.h
index 62fbc911d9..2060a878f0 100644
--- a/accel/kvm/kvm-cpus.h
+++ b/accel/kvm/kvm-cpus.h
@@ -14,4 +14,11 @@
extern CpusAccel kvm_cpus;
+int kvm_init_vcpu(CPUState *cpu);
+int kvm_cpu_exec(CPUState *cpu);
+void kvm_destroy_vcpu(CPUState *cpu);
+void kvm_cpu_synchronize_post_reset(CPUState *cpu);
+void kvm_cpu_synchronize_post_init(CPUState *cpu);
+void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu);
+
#endif /* KVM_CPUS_H */
diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c
index 69f8a842da..680e099463 100644
--- a/accel/stubs/kvm-stub.c
+++ b/accel/stubs/kvm-stub.c
@@ -32,15 +32,6 @@ bool kvm_readonly_mem_allowed;
bool kvm_ioeventfd_any_length_allowed;
bool kvm_msi_use_devid;
-void kvm_destroy_vcpu(CPUState *cpu)
-{
-}
-
-int kvm_init_vcpu(CPUState *cpu)
-{
- return -ENOSYS;
-}
-
void kvm_flush_coalesced_mmio_buffer(void)
{
}
@@ -49,19 +40,6 @@ void kvm_cpu_synchronize_state(CPUState *cpu)
{
}
-void kvm_cpu_synchronize_post_reset(CPUState *cpu)
-{
-}
-
-void kvm_cpu_synchronize_post_init(CPUState *cpu)
-{
-}
-
-int kvm_cpu_exec(CPUState *cpu)
-{
- abort();
-}
-
bool kvm_has_sync_mmu(void)
{
return false;
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 7a5f973b6f..bb03e0c68b 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -216,10 +216,6 @@ int kvm_has_many_ioeventfds(void);
int kvm_has_gsi_routing(void);
int kvm_has_intx_set_mask(void);
-int kvm_init_vcpu(CPUState *cpu);
-int kvm_cpu_exec(CPUState *cpu);
-void kvm_destroy_vcpu(CPUState *cpu);
-
/**
* kvm_arm_supports_user_irq
*
@@ -479,9 +475,6 @@ int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
#endif /* NEED_CPU_H */
void kvm_cpu_synchronize_state(CPUState *cpu);
-void kvm_cpu_synchronize_post_reset(CPUState *cpu);
-void kvm_cpu_synchronize_post_init(CPUState *cpu);
-void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu);
void kvm_init_cpu_signals(CPUState *cpu);
--
2.16.4
^ permalink raw reply related [flat|nested] 37+ messages in thread
* Re: [PATCH v5 00/14] QEMU cpus.c refactoring part2
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
` (13 preceding siblings ...)
2020-08-12 18:32 ` [PATCH v5 14/14] kvm: remove kvm " Claudio Fontana
@ 2020-08-13 14:16 ` no-reply
2020-08-13 16:06 ` Claudio Fontana
14 siblings, 1 reply; 37+ messages in thread
From: no-reply @ 2020-08-13 14:16 UTC (permalink / raw)
To: cfontana
Cc: lvivier, peter.maydell, thuth, ehabkost, alex.bennee, haxm-team,
mtosatti, qemu-devel, armbru, r.bolshakov, dovgaluk,
wenchao.wang, pbonzini, sunilmut, rth, philmd, cfontana,
colin.xu
Patchew URL: https://patchew.org/QEMU/20200812183250.9221-1-cfontana@suse.de/
Hi,
This series failed the docker-quick@centos7 build test. Please find the testing commands and
their output below. If you have Docker installed, you can probably reproduce it
locally.
=== TEST SCRIPT BEGIN ===
#!/bin/bash
make docker-image-centos7 V=1 NETWORK=1
time make docker-test-quick@centos7 SHOW_ENV=1 J=14 NETWORK=1
=== TEST SCRIPT END ===
TEST check-unit: tests/test-char
Unexpected error in object_property_try_add() at /tmp/qemu-test/src/qom/object.c:1181:
attempt to add duplicate property 'serial-id' to object (type 'container')
ERROR test-char - too few tests run (expected 38, got 9)
make: *** [check-unit] Error 1
make: *** Waiting for unfinished jobs....
TEST check-qtest-x86_64: tests/qtest/hd-geo-test
qemu-system-aarch64: -accel kvm: invalid accelerator kvm
---
raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['sudo', '-n', 'docker', 'run', '--label', 'com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404', '-u', '1001', '--security-opt', 'seccomp=unconfined', '--rm', '-e', 'TARGET_LIST=', '-e', 'EXTRA_CONFIGURE_OPTS=', '-e', 'V=', '-e', 'J=14', '-e', 'DEBUG=', '-e', 'SHOW_ENV=1', '-e', 'CCACHE_DIR=/var/tmp/ccache', '-v', '/home/patchew/.cache/qemu-docker-ccache:/var/tmp/ccache:z', '-v', '/var/tmp/patchew-tester-tmp-2np4x1wq/src/docker-src.2020-08-13-10.00.40.11908:/var/tmp/qemu:z,ro', 'qemu/centos7', '/var/tmp/qemu/run', 'test-quick']' returned non-zero exit status 2.
filter=--filter=label=com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404
make[1]: *** [docker-run] Error 1
make[1]: Leaving directory `/var/tmp/patchew-tester-tmp-2np4x1wq/src'
make: *** [docker-run-test-quick@centos7] Error 2
real 15m49.276s
user 0m8.608s
The full log is available at
http://patchew.org/logs/20200812183250.9221-1-cfontana@suse.de/testing.docker-quick@centos7/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to patchew-devel@redhat.com
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 00/14] QEMU cpus.c refactoring part2
2020-08-13 14:16 ` [PATCH v5 00/14] QEMU cpus.c refactoring part2 no-reply
@ 2020-08-13 16:06 ` Claudio Fontana
2020-08-14 7:49 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 37+ messages in thread
From: Claudio Fontana @ 2020-08-13 16:06 UTC (permalink / raw)
To: qemu-devel
Cc: lvivier, peter.maydell, thuth, ehabkost, alex.bennee, haxm-team,
mtosatti, armbru, r.bolshakov, dovgaluk, wenchao.wang, pbonzini,
sunilmut, rth, philmd, colin.xu
Any current infra work that could cause this failure?
I do not have problems when testing this set of commands locally,
for me it's all green.
Thanks,
Claudio
On 8/13/20 4:16 PM, no-reply@patchew.org wrote:
> Patchew URL: https://patchew.org/QEMU/20200812183250.9221-1-cfontana@suse.de/
>
>
>
> Hi,
>
> This series failed the docker-quick@centos7 build test. Please find the testing commands and
> their output below. If you have Docker installed, you can probably reproduce it
> locally.
>
> === TEST SCRIPT BEGIN ===
> #!/bin/bash
> make docker-image-centos7 V=1 NETWORK=1
> time make docker-test-quick@centos7 SHOW_ENV=1 J=14 NETWORK=1
> === TEST SCRIPT END ===
>
> TEST check-unit: tests/test-char
> Unexpected error in object_property_try_add() at /tmp/qemu-test/src/qom/object.c:1181:
> attempt to add duplicate property 'serial-id' to object (type 'container')
> ERROR test-char - too few tests run (expected 38, got 9)
> make: *** [check-unit] Error 1
> make: *** Waiting for unfinished jobs....
> TEST check-qtest-x86_64: tests/qtest/hd-geo-test
> qemu-system-aarch64: -accel kvm: invalid accelerator kvm
> ---
> raise CalledProcessError(retcode, cmd)
> subprocess.CalledProcessError: Command '['sudo', '-n', 'docker', 'run', '--label', 'com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404', '-u', '1001', '--security-opt', 'seccomp=unconfined', '--rm', '-e', 'TARGET_LIST=', '-e', 'EXTRA_CONFIGURE_OPTS=', '-e', 'V=', '-e', 'J=14', '-e', 'DEBUG=', '-e', 'SHOW_ENV=1', '-e', 'CCACHE_DIR=/var/tmp/ccache', '-v', '/home/patchew/.cache/qemu-docker-ccache:/var/tmp/ccache:z', '-v', '/var/tmp/patchew-tester-tmp-2np4x1wq/src/docker-src.2020-08-13-10.00.40.11908:/var/tmp/qemu:z,ro', 'qemu/centos7', '/var/tmp/qemu/run', 'test-quick']' returned non-zero exit status 2.
> filter=--filter=label=com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404
> make[1]: *** [docker-run] Error 1
> make[1]: Leaving directory `/var/tmp/patchew-tester-tmp-2np4x1wq/src'
> make: *** [docker-run-test-quick@centos7] Error 2
>
> real 15m49.276s
> user 0m8.608s
>
>
> The full log is available at
> http://patchew.org/logs/20200812183250.9221-1-cfontana@suse.de/testing.docker-quick@centos7/?type=message.
> ---
> Email generated automatically by Patchew [https://patchew.org/].
> Please send your feedback to patchew-devel@redhat.com
>
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 00/14] QEMU cpus.c refactoring part2
2020-08-13 16:06 ` Claudio Fontana
@ 2020-08-14 7:49 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 37+ messages in thread
From: Philippe Mathieu-Daudé @ 2020-08-14 7:49 UTC (permalink / raw)
To: Claudio Fontana, qemu-devel, Marc-André Lureau
Cc: lvivier, peter.maydell, thuth, ehabkost, haxm-team, mtosatti,
armbru, r.bolshakov, dovgaluk, wenchao.wang, pbonzini, sunilmut,
rth, alex.bennee, colin.xu
On 8/13/20 6:06 PM, Claudio Fontana wrote:
> Any current infra work that could cause this failure?
>
> I do not have problems when testing this set of commands locally,
> for me it's all green.
Marc-André tried to debug this, but is having hard time reproducing.
>
> Thanks,
>
> Claudio
>
> On 8/13/20 4:16 PM, no-reply@patchew.org wrote:
>> Patchew URL: https://patchew.org/QEMU/20200812183250.9221-1-cfontana@suse.de/
>>
>>
>>
>> Hi,
>>
>> This series failed the docker-quick@centos7 build test. Please find the testing commands and
>> their output below. If you have Docker installed, you can probably reproduce it
>> locally.
>>
>> === TEST SCRIPT BEGIN ===
>> #!/bin/bash
>> make docker-image-centos7 V=1 NETWORK=1
>> time make docker-test-quick@centos7 SHOW_ENV=1 J=14 NETWORK=1
>> === TEST SCRIPT END ===
>>
>> TEST check-unit: tests/test-char
>> Unexpected error in object_property_try_add() at /tmp/qemu-test/src/qom/object.c:1181:
>> attempt to add duplicate property 'serial-id' to object (type 'container')
>> ERROR test-char - too few tests run (expected 38, got 9)
>> make: *** [check-unit] Error 1
>> make: *** Waiting for unfinished jobs....
>> TEST check-qtest-x86_64: tests/qtest/hd-geo-test
>> qemu-system-aarch64: -accel kvm: invalid accelerator kvm
>> ---
>> raise CalledProcessError(retcode, cmd)
>> subprocess.CalledProcessError: Command '['sudo', '-n', 'docker', 'run', '--label', 'com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404', '-u', '1001', '--security-opt', 'seccomp=unconfined', '--rm', '-e', 'TARGET_LIST=', '-e', 'EXTRA_CONFIGURE_OPTS=', '-e', 'V=', '-e', 'J=14', '-e', 'DEBUG=', '-e', 'SHOW_ENV=1', '-e', 'CCACHE_DIR=/var/tmp/ccache', '-v', '/home/patchew/.cache/qemu-docker-ccache:/var/tmp/ccache:z', '-v', '/var/tmp/patchew-tester-tmp-2np4x1wq/src/docker-src.2020-08-13-10.00.40.11908:/var/tmp/qemu:z,ro', 'qemu/centos7', '/var/tmp/qemu/run', 'test-quick']' returned non-zero exit status 2.
>> filter=--filter=label=com.qemu.instance.uuid=e2cd2d5f1f1d4eb6bc6bcd79e3d16404
>> make[1]: *** [docker-run] Error 1
>> make[1]: Leaving directory `/var/tmp/patchew-tester-tmp-2np4x1wq/src'
>> make: *** [docker-run-test-quick@centos7] Error 2
>>
>> real 15m49.276s
>> user 0m8.608s
>>
>>
>> The full log is available at
>> http://patchew.org/logs/20200812183250.9221-1-cfontana@suse.de/testing.docker-quick@centos7/?type=message.
>> ---
>> Email generated automatically by Patchew [https://patchew.org/].
>> Please send your feedback to patchew-devel@redhat.com
>>
>
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 01/14] cpu-timers, icount: new modules
2020-08-12 18:32 ` [PATCH v5 01/14] cpu-timers, icount: new modules Claudio Fontana
@ 2020-08-14 20:20 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
0 siblings, 1 reply; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:20 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +/*
> + * Return the icount enablement state:
> + *
> + * 0 = Disabled - Do not count executed instructions.
> + * 1 = Enabled - Fixed conversion of insn to ns via "shift" option
> + * 2 = Enabled - Runtime adaptive algorithm to compute shift
> + */
> +int icount_enabled(void);
Why does use_icount need to change to a function?
If it does, or even if this just comes under the heading of cleanup, it should
certainly be done in a separate patch.
Either way, I think we should expose the fact that this is always disabled when
#ifndef CONFIG_TCG, just like we do for tcg_enabled().
> - if (use_icount) {
> - return cpu_get_icount();
> + if (icount_enabled()) {
> + return icount_get();
Renaming of other functions like this should also be done in a separate patch.
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface
2020-08-12 18:32 ` [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface Claudio Fontana
@ 2020-08-14 20:28 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
0 siblings, 1 reply; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:28 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> uint64_t cpu_get_tsc(CPUX86State *env)
> {
> - return cpu_get_ticks();
> + return cpus_get_elapsed_ticks();
What has this change got to do with creating the interface?
You said the interface wasn't used yet...
> diff --git a/stubs/cpu-synchronize-state.c b/stubs/cpu-synchronize-state.c
> new file mode 100644
> index 0000000000..3112fe439d
> --- /dev/null
> +++ b/stubs/cpu-synchronize-state.c
> @@ -0,0 +1,15 @@
> +#include "qemu/osdep.h"
> +#include "sysemu/hw_accel.h"
> +
> +void cpu_synchronize_state(CPUState *cpu)
> +{
> +}
> +void cpu_synchronize_post_reset(CPUState *cpu)
> +{
> +}
> +void cpu_synchronize_post_init(CPUState *cpu)
> +{
> +}
> +void cpu_synchronize_pre_loadvm(CPUState *cpu)
> +{
> +}
> diff --git a/stubs/cpus-get-virtual-clock.c b/stubs/cpus-get-virtual-clock.c
> new file mode 100644
> index 0000000000..fd447d53f3
> --- /dev/null
> +++ b/stubs/cpus-get-virtual-clock.c
> @@ -0,0 +1,8 @@
> +#include "qemu/osdep.h"
> +#include "sysemu/cpu-timers.h"
> +#include "qemu/main-loop.h"
> +
> +int64_t cpus_get_virtual_clock(void)
> +{
> + return cpu_get_clock();
> +}
How do these stubs get used?
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg
2020-08-12 18:32 ` [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg Claudio Fontana
@ 2020-08-14 20:39 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
0 siblings, 1 reply; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:39 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +static int64_t tcg_get_virtual_clock(void)
> +{
> + if (icount_enabled()) {
> + return icount_get();
> + }
> + return cpu_get_clock();
> +}
> +
> +static int64_t tcg_get_elapsed_ticks(void)
> +{
> + if (icount_enabled()) {
> + return icount_get();
> + }
> + return cpu_get_ticks();
> +}
> +
> +CpusAccel tcg_cpus = {
> + .create_vcpu_thread = tcg_start_vcpu_thread,
> + .kick_vcpu_thread = tcg_kick_vcpu_thread,
> + .get_virtual_clock = tcg_get_virtual_clock,
> + .get_elapsed_ticks = tcg_get_elapsed_ticks,
> +};
I think this variable should be const. Which of course means that the previous
patch needs to add const annotations.
I think you should actually have multiple dispatch variables: with icount and
without, with mttcg and without. That way these methods don't have to check
icount_enabled() or qemu_tcg_mttcg_enabled() at runtime, only at startup.
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest
2020-08-12 18:32 ` [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest Claudio Fontana
@ 2020-08-14 20:42 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:42 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +CpusAccel qtest_cpus = {
> + .create_vcpu_thread = qtest_start_vcpu_thread,
> + .get_virtual_clock = qtest_get_virtual_clock,
> +};
const.
Do you need to fill in the other methods, even if they do nothing but
g_assert_not_reached()?
> - qemu_dummy_start_vcpu(cpu);
> + assert(0);
g_assert_not_reached();
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm
2020-08-12 18:32 ` [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm Claudio Fontana
@ 2020-08-14 20:44 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:44 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +
> +CpusAccel kvm_cpus = {
> + .create_vcpu_thread = kvm_start_vcpu_thread,
> +
> + .synchronize_post_reset = kvm_cpu_synchronize_post_reset,
> + .synchronize_post_init = kvm_cpu_synchronize_post_init,
> + .synchronize_state = kvm_cpu_synchronize_state,
> + .synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm,
> +};
const.
Otherwise,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/
2020-08-12 18:32 ` [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/ Claudio Fontana
@ 2020-08-14 20:48 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:48 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +CpusAccel hax_cpus = {
> + .create_vcpu_thread = hax_start_vcpu_thread,
> + .kick_vcpu_thread = hax_kick_vcpu_thread,
> +
> + .synchronize_post_reset = hax_cpu_synchronize_post_reset,
> + .synchronize_post_init = hax_cpu_synchronize_post_init,
> + .synchronize_state = hax_cpu_synchronize_state,
> + .synchronize_pre_loadvm = hax_cpu_synchronize_pre_loadvm,
> +};
const.
Otherwise,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 07/14] cpus: extract out whpx-specific code to target/i386/
2020-08-12 18:32 ` [PATCH v5 07/14] cpus: extract out whpx-specific " Claudio Fontana
@ 2020-08-14 20:49 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:49 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +CpusAccel whpx_cpus = {
> + .create_vcpu_thread = whpx_start_vcpu_thread,
> + .kick_vcpu_thread = whpx_kick_vcpu_thread,
> +
> + .synchronize_post_reset = whpx_cpu_synchronize_post_reset,
> + .synchronize_post_init = whpx_cpu_synchronize_post_init,
> + .synchronize_state = whpx_cpu_synchronize_state,
> + .synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm,
> +};
const.
Otherwise,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/
2020-08-12 18:32 ` [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/ Claudio Fontana
@ 2020-08-14 20:51 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:51 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +CpusAccel hvf_cpus = {
> + .create_vcpu_thread = hvf_start_vcpu_thread,
> +
> + .synchronize_post_reset = hvf_cpu_synchronize_post_reset,
> + .synchronize_post_init = hvf_cpu_synchronize_post_init,
> + .synchronize_state = hvf_cpu_synchronize_state,
> + .synchronize_pre_loadvm = hvf_cpu_synchronize_pre_loadvm,
> +};
const.
Otherwise,
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 09/14] cpus: cleanup now unneeded includes
2020-08-12 18:32 ` [PATCH v5 09/14] cpus: cleanup now unneeded includes Claudio Fontana
@ 2020-08-14 20:51 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 20:51 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
> softmmu/cpus.c | 7 -------
> 1 file changed, 7 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface
2020-08-12 18:32 ` [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface Claudio Fontana
@ 2020-08-14 21:01 ` Richard Henderson
2020-08-17 12:31 ` Roman Bolshakov
2020-08-19 13:50 ` Claudio Fontana
0 siblings, 2 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 21:01 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> +static void generic_handle_interrupt(CPUState *cpu, int mask)
> +{
> + cpu->interrupt_request |= mask;
> +
> + if (!qemu_cpu_is_self(cpu)) {
> + qemu_cpu_kick(cpu);
> + }
> +}
> +
> +void cpu_interrupt(CPUState *cpu, int mask)
> +{
> + if (cpus_accel && cpus_accel->handle_interrupt) {
> + cpus_accel->handle_interrupt(cpu, mask);
> + } else {
> + generic_handle_interrupt(cpu, mask);
> + }
> +}
First, by this point you have converted all of the accelerators, so I would
expect cpus_accel to always be non-null. I would expect a patch immediately
preceding this one to place an assert to that effect somewhere in the startup
code, and to remove all of the checks.
Second, I would prefer that all methods be non-null, so that you don't need to
check that either. This patch would add generic_handle_interrupt (perhaps
named cpus_accel_default_handle_interrupt declared in sysemu/cpus.h?) to the
CpusAccel structure of all except TCG.
Similarly for all other methods that are checking non-null-ness of the method
pointer. Perhaps assert non-null for each method in cpus_register_accel().
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 11/14] hvf: remove hvf specific functions from global includes
2020-08-12 18:32 ` [PATCH v5 11/14] hvf: remove hvf specific functions from global includes Claudio Fontana
@ 2020-08-14 21:02 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 21:02 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
> accel/stubs/Makefile.objs | 1 -
> accel/stubs/hvf-stub.c | 30 ------------------------------
> include/sysemu/hvf.h | 8 --------
> target/i386/hvf/hvf-cpus.h | 8 ++++++++
> target/i386/hvf/x86hvf.c | 2 ++
> target/i386/hvf/x86hvf.h | 1 -
> 6 files changed, 10 insertions(+), 40 deletions(-)
> delete mode 100644 accel/stubs/hvf-stub.c
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 12/14] whpx: remove whpx specific functions from global includes
2020-08-12 18:32 ` [PATCH v5 12/14] whpx: remove whpx " Claudio Fontana
@ 2020-08-14 21:03 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 21:03 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
> accel/stubs/Makefile.objs | 1 -
> accel/stubs/whpx-stub.c | 47 -----------------------------------------------
> include/sysemu/whpx.h | 19 -------------------
> target/i386/whpx-cpus.h | 17 +++++++++++++++++
> 4 files changed, 17 insertions(+), 67 deletions(-)
> delete mode 100644 accel/stubs/whpx-stub.c
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 13/14] hax: remove hax specific functions from global includes
2020-08-12 18:32 ` [PATCH v5 13/14] hax: remove hax " Claudio Fontana
@ 2020-08-14 21:06 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 21:06 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
> accel/stubs/hax-stub.c | 10 ----------
> include/sysemu/hax.h | 17 -----------------
> target/i386/hax-all.c | 1 -
> target/i386/hax-cpus.c | 1 -
> target/i386/hax-cpus.h | 16 ++++++++++++++++
> target/i386/hax-mem.c | 2 +-
> target/i386/hax-posix.c | 3 +--
> target/i386/hax-windows.c | 2 +-
> target/i386/hax-windows.h | 2 ++
> 9 files changed, 21 insertions(+), 33 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 14/14] kvm: remove kvm specific functions from global includes
2020-08-12 18:32 ` [PATCH v5 14/14] kvm: remove kvm " Claudio Fontana
@ 2020-08-14 21:07 ` Richard Henderson
0 siblings, 0 replies; 37+ messages in thread
From: Richard Henderson @ 2020-08-14 21:07 UTC (permalink / raw)
To: Claudio Fontana, Paolo Bonzini, Alex Bennée, Peter Maydell,
Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/12/20 11:32 AM, Claudio Fontana wrote:
> Signed-off-by: Claudio Fontana <cfontana@suse.de>
> ---
> accel/kvm/kvm-cpus.h | 7 +++++++
> accel/stubs/kvm-stub.c | 22 ----------------------
> include/sysemu/kvm.h | 7 -------
> 3 files changed, 7 insertions(+), 29 deletions(-)
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
r~
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface
2020-08-14 21:01 ` Richard Henderson
@ 2020-08-17 12:31 ` Roman Bolshakov
2020-08-19 13:50 ` Claudio Fontana
1 sibling, 0 replies; 37+ messages in thread
From: Roman Bolshakov @ 2020-08-17 12:31 UTC (permalink / raw)
To: Richard Henderson
Cc: Laurent Vivier, Peter Maydell, Thomas Huth, Eduardo Habkost,
Colin Xu, Alex Bennée, haxm-team, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Claudio Fontana,
Paolo Bonzini, Sunil Muthuswamy, Richard Henderson,
Philippe Mathieu-Daudé,
Wenchao Wang
On Fri, Aug 14, 2020 at 02:01:01PM -0700, Richard Henderson wrote:
> On 8/12/20 11:32 AM, Claudio Fontana wrote:
> > +static void generic_handle_interrupt(CPUState *cpu, int mask)
> > +{
> > + cpu->interrupt_request |= mask;
> > +
> > + if (!qemu_cpu_is_self(cpu)) {
> > + qemu_cpu_kick(cpu);
> > + }
> > +}
> > +
> > +void cpu_interrupt(CPUState *cpu, int mask)
> > +{
> > + if (cpus_accel && cpus_accel->handle_interrupt) {
> > + cpus_accel->handle_interrupt(cpu, mask);
> > + } else {
> > + generic_handle_interrupt(cpu, mask);
> > + }
> > +}
>
> First, by this point you have converted all of the accelerators, so I would
> expect cpus_accel to always be non-null. I would expect a patch immediately
> preceding this one to place an assert to that effect somewhere in the startup
> code, and to remove all of the checks.
>
> Second, I would prefer that all methods be non-null, so that you don't need to
> check that either. This patch would add generic_handle_interrupt (perhaps
> named cpus_accel_default_handle_interrupt declared in sysemu/cpus.h?) to the
> CpusAccel structure of all except TCG.
>
> Similarly for all other methods that are checking non-null-ness of the method
> pointer. Perhaps assert non-null for each method in cpus_register_accel().
>
>
I concur with that. It's similar to my comment to the previous revision
of the series.
Regards,
Roman
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 01/14] cpu-timers, icount: new modules
2020-08-14 20:20 ` Richard Henderson
@ 2020-08-19 13:49 ` Claudio Fontana
0 siblings, 0 replies; 37+ messages in thread
From: Claudio Fontana @ 2020-08-19 13:49 UTC (permalink / raw)
To: Richard Henderson, Paolo Bonzini, Alex Bennée,
Peter Maydell, Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
Hello Richard,
On 8/14/20 10:20 PM, Richard Henderson wrote:
> On 8/12/20 11:32 AM, Claudio Fontana wrote:
>> +/*
>> + * Return the icount enablement state:
>> + *
>> + * 0 = Disabled - Do not count executed instructions.
>> + * 1 = Enabled - Fixed conversion of insn to ns via "shift" option
>> + * 2 = Enabled - Runtime adaptive algorithm to compute shift
>> + */
>> +int icount_enabled(void);
>
> Why does use_icount need to change to a function?
It is not useful at this point, I'll change this.
>
> If it does, or even if this just comes under the heading of cleanup, it should
> certainly be done in a separate patch.
Yes, I'll move it to a different series entirely.
>
> Either way, I think we should expose the fact that this is always disabled when
> #ifndef CONFIG_TCG, just like we do for tcg_enabled().
Will do.
>
>> - if (use_icount) {
>> - return cpu_get_icount();
>> + if (icount_enabled()) {
>> + return icount_get();
>
> Renaming of other functions like this should also be done in a separate patch.
Is there a compelling reason to separate the new module/class from what are effectively its methods?
It seemed to me that creating a new icount module would warrant the name changes in the same patch.
>
>
> r~
>
I will be out of office until end of the month,
thanks,
Claudio
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface
2020-08-14 20:28 ` Richard Henderson
@ 2020-08-19 13:49 ` Claudio Fontana
0 siblings, 0 replies; 37+ messages in thread
From: Claudio Fontana @ 2020-08-19 13:49 UTC (permalink / raw)
To: Richard Henderson, Paolo Bonzini, Alex Bennée,
Peter Maydell, Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
Hello Richard,
On 8/14/20 10:28 PM, Richard Henderson wrote:
> On 8/12/20 11:32 AM, Claudio Fontana wrote:
>> uint64_t cpu_get_tsc(CPUX86State *env)
>> {
>> - return cpu_get_ticks();
>> + return cpus_get_elapsed_ticks();
>
> What has this change got to do with creating the interface?
> You said the interface wasn't used yet...
the new CpusAccel interface isn't used,
The cpu_get_ticks() function is changed to mean getting the actual cpu ticks,
while cpus_get_elapsed_ticks() contains the code that special cases icount and qtest,
until the respective CpusAccel enablement patches.
>
>
>> diff --git a/stubs/cpu-synchronize-state.c b/stubs/cpu-synchronize-state.c
>> new file mode 100644
>> index 0000000000..3112fe439d
>> --- /dev/null
>> +++ b/stubs/cpu-synchronize-state.c
>> @@ -0,0 +1,15 @@
>> +#include "qemu/osdep.h"
>> +#include "sysemu/hw_accel.h"
>> +
>> +void cpu_synchronize_state(CPUState *cpu)
>> +{
>> +}
>> +void cpu_synchronize_post_reset(CPUState *cpu)
>> +{
>> +}
>> +void cpu_synchronize_post_init(CPUState *cpu)
>> +{
>> +}
>> +void cpu_synchronize_pre_loadvm(CPUState *cpu)
>> +{
>> +}
these are needed for non softmmu builds by hw/core/cpu.c
and by gdbstub.c,
but actually we could get away with just _state() and _post_init(). Will remove the others.
>> diff --git a/stubs/cpus-get-virtual-clock.c b/stubs/cpus-get-virtual-clock.c
>> new file mode 100644
>> index 0000000000..fd447d53f3
>> --- /dev/null
>> +++ b/stubs/cpus-get-virtual-clock.c
>> @@ -0,0 +1,8 @@
>> +#include "qemu/osdep.h"
>> +#include "sysemu/cpu-timers.h"
>> +#include "qemu/main-loop.h"
>> +
>> +int64_t cpus_get_virtual_clock(void)
>> +{
>> + return cpu_get_clock();
>> +}
>
> How do these stubs get used?
>
>
> r~
>
util/timer.c needs it for non-softmmu builds (see previous discussion with Paolo).
Thanks,
Claudio
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg
2020-08-14 20:39 ` Richard Henderson
@ 2020-08-19 13:49 ` Claudio Fontana
0 siblings, 0 replies; 37+ messages in thread
From: Claudio Fontana @ 2020-08-19 13:49 UTC (permalink / raw)
To: Richard Henderson, Paolo Bonzini, Alex Bennée,
Peter Maydell, Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/14/20 10:39 PM, Richard Henderson wrote:
> On 8/12/20 11:32 AM, Claudio Fontana wrote:
>> +static int64_t tcg_get_virtual_clock(void)
>> +{
>> + if (icount_enabled()) {
>> + return icount_get();
>> + }
>> + return cpu_get_clock();
>> +}
>> +
>> +static int64_t tcg_get_elapsed_ticks(void)
>> +{
>> + if (icount_enabled()) {
>> + return icount_get();
>> + }
>> + return cpu_get_ticks();
>> +}
>> +
>> +CpusAccel tcg_cpus = {
>> + .create_vcpu_thread = tcg_start_vcpu_thread,
>> + .kick_vcpu_thread = tcg_kick_vcpu_thread,
>> + .get_virtual_clock = tcg_get_virtual_clock,
>> + .get_elapsed_ticks = tcg_get_elapsed_ticks,
>> +};
>
> I think this variable should be const. Which of course means that the previous
> patch needs to add const annotations.
Will add.
>
> I think you should actually have multiple dispatch variables: with icount and
> without, with mttcg and without. That way these methods don't have to check
> icount_enabled() or qemu_tcg_mttcg_enabled() at runtime, only at startup.
I gave it a try, it would work, however it is basically a refactoring of the existing qemu_tcg_init_vcpu ,
I'd do it in a separate series if possible (with some help from Alex?)
Claudio
>
>
> r~
>
^ permalink raw reply [flat|nested] 37+ messages in thread
* Re: [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface
2020-08-14 21:01 ` Richard Henderson
2020-08-17 12:31 ` Roman Bolshakov
@ 2020-08-19 13:50 ` Claudio Fontana
1 sibling, 0 replies; 37+ messages in thread
From: Claudio Fontana @ 2020-08-19 13:50 UTC (permalink / raw)
To: Richard Henderson, Paolo Bonzini, Alex Bennée,
Peter Maydell, Philippe Mathieu-Daudé,
Roman Bolshakov
Cc: Laurent Vivier, Thomas Huth, Eduardo Habkost, Marcelo Tosatti,
qemu-devel, Markus Armbruster, Pavel Dovgalyuk, Wenchao Wang,
haxm-team, Sunil Muthuswamy, Richard Henderson, Colin Xu
On 8/14/20 11:01 PM, Richard Henderson wrote:
> On 8/12/20 11:32 AM, Claudio Fontana wrote:
>> +static void generic_handle_interrupt(CPUState *cpu, int mask)
>> +{
>> + cpu->interrupt_request |= mask;
>> +
>> + if (!qemu_cpu_is_self(cpu)) {
>> + qemu_cpu_kick(cpu);
>> + }
>> +}
>> +
>> +void cpu_interrupt(CPUState *cpu, int mask)
>> +{
>> + if (cpus_accel && cpus_accel->handle_interrupt) {
>> + cpus_accel->handle_interrupt(cpu, mask);
>> + } else {
>> + generic_handle_interrupt(cpu, mask);
>> + }
>> +}
>
> First, by this point you have converted all of the accelerators, so I would
> expect cpus_accel to always be non-null. I would expect a patch immediately
> preceding this one to place an assert to that effect somewhere in the startup
> code, and to remove all of the checks.
Ok.
>
> Second, I would prefer that all methods be non-null, so that you don't need to
> check that either.
This contrasts a bit with the previous comments by Paolo to try to express only the "interesting" bits in the CpusAccel struct in each module.
> This patch would add generic_handle_interrupt (perhaps
> named cpus_accel_default_handle_interrupt declared in sysemu/cpus.h?) to the
> CpusAccel structure of all except TCG.
>
> Similarly for all other methods that are checking non-null-ness of the method
> pointer. Perhaps assert non-null for each method in cpus_register_accel().
>
>
> r~
>
That was my initial approach in very old versions of the series (all fields as explicit and mandatory),
I changed direction there due to Paolo's comments. For me both solutions are fine, each has its merits and downsides.
Thanks,
Claudio
^ permalink raw reply [flat|nested] 37+ messages in thread
end of thread, other threads:[~2020-08-19 13:51 UTC | newest]
Thread overview: 37+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-12 18:32 [PATCH v5 00/14] QEMU cpus.c refactoring part2 Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 01/14] cpu-timers, icount: new modules Claudio Fontana
2020-08-14 20:20 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 02/14] cpus: prepare new CpusAccel cpu accelerator interface Claudio Fontana
2020-08-14 20:28 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 03/14] cpus: extract out TCG-specific code to accel/tcg Claudio Fontana
2020-08-14 20:39 ` Richard Henderson
2020-08-19 13:49 ` Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 04/14] cpus: extract out qtest-specific code to accel/qtest Claudio Fontana
2020-08-14 20:42 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 05/14] cpus: extract out kvm-specific code to accel/kvm Claudio Fontana
2020-08-14 20:44 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 06/14] cpus: extract out hax-specific code to target/i386/ Claudio Fontana
2020-08-14 20:48 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 07/14] cpus: extract out whpx-specific " Claudio Fontana
2020-08-14 20:49 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 08/14] cpus: extract out hvf-specific code to target/i386/hvf/ Claudio Fontana
2020-08-14 20:51 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 09/14] cpus: cleanup now unneeded includes Claudio Fontana
2020-08-14 20:51 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 10/14] cpus: add handle_interrupt to the CpusAccel interface Claudio Fontana
2020-08-14 21:01 ` Richard Henderson
2020-08-17 12:31 ` Roman Bolshakov
2020-08-19 13:50 ` Claudio Fontana
2020-08-12 18:32 ` [PATCH v5 11/14] hvf: remove hvf specific functions from global includes Claudio Fontana
2020-08-14 21:02 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 12/14] whpx: remove whpx " Claudio Fontana
2020-08-14 21:03 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 13/14] hax: remove hax " Claudio Fontana
2020-08-14 21:06 ` Richard Henderson
2020-08-12 18:32 ` [PATCH v5 14/14] kvm: remove kvm " Claudio Fontana
2020-08-14 21:07 ` Richard Henderson
2020-08-13 14:16 ` [PATCH v5 00/14] QEMU cpus.c refactoring part2 no-reply
2020-08-13 16:06 ` Claudio Fontana
2020-08-14 7:49 ` Philippe Mathieu-Daudé
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