* [Qemu-devel] [PATCH 00/37] [PULL] qemu-kvm.git uq/master queue
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Marcelo Tosatti, qemu-devel, kvm
The following changes since commit 8668f61d20eac971d116ebbe8436b4ae963884a8:
vmmouse: fix queue_size field initialization (2011-02-12 17:44:11 +0000)
are available in the git repository at:
git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git uq/master
Anthony PERARD (1):
Introduce log_start/log_stop in CPUPhysMemoryClient
Glauber Costa (1):
kvm: make tsc stable over migration and machine start
Jan Kiszka (35):
Prevent abortion on multiple VCPU kicks
Stop current VCPU on synchronous reset requests
Process vmstop requests in IO thread
Trigger exit from cpu_exec_all on pending IO events
Leave inner main_loop faster on pending requests
Flatten the main loop
kvm: Report proper error on GET_VCPU_MMAP_SIZE failures
kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn
kvm: Handle kvm_init_vcpu errors
kvm: Provide sigbus services arch-independently
Refactor signal setup functions in cpus.c
kvm: Set up signal mask also for !CONFIG_IOTHREAD
kvm: Refactor qemu_kvm_eat_signals
kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD
Set up signalfd under !CONFIG_IOTHREAD
kvm: Fix race between timer signals and vcpu entry under !IOTHREAD
kvm: Add MCE signal support for !CONFIG_IOTHREAD
Introduce VCPU self-signaling service
kvm: Unconditionally reenter kernel after IO exits
kvm: Remove static return code of kvm_handle_io
kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWN
Refactor kvm&tcg function names in cpus.c
Refactor cpu_has_work/any_cpu_has_work in cpus.c
Fix a few coding style violations in cpus.c
Improve vm_stop reason declarations
Refactor debug and vmstop request interface
Move debug exception handling out of cpu_exec
kvm: Separate TCG from KVM cpu execution
kvm: x86: Prepare VCPU loop for in-kernel irqchip
kvm: Drop return values from kvm_arch_pre/post_run
kvm: x86: Catch and report failing IRQ and NMI injections
kvm: Remove unneeded memory slot reservation
cirrus: Remove obsolete kvm.h include
kvm: Make kvm_state globally available
kvm: x86: Introduce kvmclock device to save/restore its state
Makefile.objs | 2 +-
Makefile.target | 4 +-
configure | 6 +
cpu-all.h | 6 +
cpu-common.h | 4 +
cpu-defs.h | 1 +
cpu-exec.c | 43 +---
cpus.c | 725 ++++++++++++++++++++++++++++++++--------------------
cpus.h | 3 +-
exec.c | 30 +++
gdbstub.c | 19 +-
hw/cirrus_vga.c | 1 -
hw/ide/core.c | 2 +-
hw/kvmclock.c | 125 +++++++++
hw/kvmclock.h | 14 +
hw/pc_piix.c | 32 ++-
hw/scsi-disk.c | 2 +-
hw/vga.c | 31 ++-
hw/vhost.c | 2 +
hw/virtio-blk.c | 2 +-
hw/watchdog.c | 2 +-
kvm-all.c | 89 ++++---
kvm-stub.c | 15 +-
kvm.h | 16 +-
migration.c | 2 +-
monitor.c | 4 +-
qemu-common.h | 1 +
savevm.c | 4 +-
sysemu.h | 12 +
target-i386/cpu.h | 1 +
target-i386/kvm.c | 112 ++++++---
target-ppc/kvm.c | 16 +-
target-s390x/kvm.c | 16 +-
vl.c | 62 +++--
34 files changed, 921 insertions(+), 485 deletions(-)
create mode 100644 hw/kvmclock.c
create mode 100644 hw/kvmclock.h
^ permalink raw reply [flat|nested] 85+ messages in thread* [PATCH 01/37] Prevent abortion on multiple VCPU kicks
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
If we call qemu_cpu_kick more than once before the target was able to
process the signal, pthread_kill will fail, and qemu will abort. Prevent
this by avoiding the redundant signal.
This logic can be found in qemu-kvm as well.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-defs.h | 1 +
cpus.c | 6 +++++-
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/cpu-defs.h b/cpu-defs.h
index 8d4bf86..db809ed 100644
--- a/cpu-defs.h
+++ b/cpu-defs.h
@@ -205,6 +205,7 @@ typedef struct CPUWatchpoint {
uint32_t stopped; /* Artificially stopped */ \
struct QemuThread *thread; \
struct QemuCond *halt_cond; \
+ int thread_kicked; \
struct qemu_work_item *queued_work_first, *queued_work_last; \
const char *cpu_model_str; \
struct KVMState *kvm_state; \
diff --git a/cpus.c b/cpus.c
index 4c9928e..ab6e40e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -481,6 +481,7 @@ static void qemu_wait_io_event_common(CPUState *env)
qemu_cond_signal(&qemu_pause_cond);
}
flush_queued_work(env);
+ env->thread_kicked = false;
}
static void qemu_tcg_wait_io_event(void)
@@ -648,7 +649,10 @@ void qemu_cpu_kick(void *_env)
{
CPUState *env = _env;
qemu_cond_broadcast(env->halt_cond);
- qemu_thread_signal(env->thread, SIG_IPI);
+ if (!env->thread_kicked) {
+ qemu_thread_signal(env->thread, SIG_IPI);
+ env->thread_kicked = true;
+ }
}
int qemu_cpu_self(void *_env)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 01/37] Prevent abortion on multiple VCPU kicks
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
If we call qemu_cpu_kick more than once before the target was able to
process the signal, pthread_kill will fail, and qemu will abort. Prevent
this by avoiding the redundant signal.
This logic can be found in qemu-kvm as well.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-defs.h | 1 +
cpus.c | 6 +++++-
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/cpu-defs.h b/cpu-defs.h
index 8d4bf86..db809ed 100644
--- a/cpu-defs.h
+++ b/cpu-defs.h
@@ -205,6 +205,7 @@ typedef struct CPUWatchpoint {
uint32_t stopped; /* Artificially stopped */ \
struct QemuThread *thread; \
struct QemuCond *halt_cond; \
+ int thread_kicked; \
struct qemu_work_item *queued_work_first, *queued_work_last; \
const char *cpu_model_str; \
struct KVMState *kvm_state; \
diff --git a/cpus.c b/cpus.c
index 4c9928e..ab6e40e 100644
--- a/cpus.c
+++ b/cpus.c
@@ -481,6 +481,7 @@ static void qemu_wait_io_event_common(CPUState *env)
qemu_cond_signal(&qemu_pause_cond);
}
flush_queued_work(env);
+ env->thread_kicked = false;
}
static void qemu_tcg_wait_io_event(void)
@@ -648,7 +649,10 @@ void qemu_cpu_kick(void *_env)
{
CPUState *env = _env;
qemu_cond_broadcast(env->halt_cond);
- qemu_thread_signal(env->thread, SIG_IPI);
+ if (!env->thread_kicked) {
+ qemu_thread_signal(env->thread, SIG_IPI);
+ env->thread_kicked = true;
+ }
}
int qemu_cpu_self(void *_env)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 02/37] Stop current VCPU on synchronous reset requests
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
If some I/O operation ends up calling qemu_system_reset_request in VCPU
context, we record this and inform the io-thread, but we do not
terminate the VCPU loop. This can lead to fairly unexpected behavior if
the triggering reset operation is supposed to work synchronously.
Fix this for TCG (when run in deterministic I/O mode) by setting the
VCPU on stop and issuing a cpu_exit. KVM requires some more work on its
VCPU loop.
[ ported from qemu-kvm ]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 17 +++++++++++++----
cpus.h | 1 +
vl.c | 1 +
3 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/cpus.c b/cpus.c
index ab6e40e..f8a88e3 100644
--- a/cpus.c
+++ b/cpus.c
@@ -312,6 +312,10 @@ void qemu_notify_event(void)
void qemu_mutex_lock_iothread(void) {}
void qemu_mutex_unlock_iothread(void) {}
+void cpu_stop_current(void)
+{
+}
+
void vm_stop(int reason)
{
do_vm_stop(reason);
@@ -852,6 +856,14 @@ static void qemu_system_vmstop_request(int reason)
qemu_notify_event();
}
+void cpu_stop_current(void)
+{
+ if (cpu_single_env) {
+ cpu_single_env->stopped = 1;
+ cpu_exit(cpu_single_env);
+ }
+}
+
void vm_stop(int reason)
{
QemuThread me;
@@ -863,10 +875,7 @@ void vm_stop(int reason)
* FIXME: should not return to device code in case
* vm_stop() has been requested.
*/
- if (cpu_single_env) {
- cpu_exit(cpu_single_env);
- cpu_single_env->stop = 1;
- }
+ cpu_stop_current();
return;
}
do_vm_stop(reason);
diff --git a/cpus.h b/cpus.h
index bf4d9bb..4cadb64 100644
--- a/cpus.h
+++ b/cpus.h
@@ -6,6 +6,7 @@ int qemu_init_main_loop(void);
void qemu_main_loop_start(void);
void resume_all_vcpus(void);
void pause_all_vcpus(void);
+void cpu_stop_current(void);
/* vl.c */
extern int smp_cores;
diff --git a/vl.c b/vl.c
index ed2cdfa..5e3f7f2 100644
--- a/vl.c
+++ b/vl.c
@@ -1296,6 +1296,7 @@ void qemu_system_reset_request(void)
} else {
reset_requested = 1;
}
+ cpu_stop_current();
qemu_notify_event();
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 02/37] Stop current VCPU on synchronous reset requests
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
If some I/O operation ends up calling qemu_system_reset_request in VCPU
context, we record this and inform the io-thread, but we do not
terminate the VCPU loop. This can lead to fairly unexpected behavior if
the triggering reset operation is supposed to work synchronously.
Fix this for TCG (when run in deterministic I/O mode) by setting the
VCPU on stop and issuing a cpu_exit. KVM requires some more work on its
VCPU loop.
[ ported from qemu-kvm ]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 17 +++++++++++++----
cpus.h | 1 +
vl.c | 1 +
3 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/cpus.c b/cpus.c
index ab6e40e..f8a88e3 100644
--- a/cpus.c
+++ b/cpus.c
@@ -312,6 +312,10 @@ void qemu_notify_event(void)
void qemu_mutex_lock_iothread(void) {}
void qemu_mutex_unlock_iothread(void) {}
+void cpu_stop_current(void)
+{
+}
+
void vm_stop(int reason)
{
do_vm_stop(reason);
@@ -852,6 +856,14 @@ static void qemu_system_vmstop_request(int reason)
qemu_notify_event();
}
+void cpu_stop_current(void)
+{
+ if (cpu_single_env) {
+ cpu_single_env->stopped = 1;
+ cpu_exit(cpu_single_env);
+ }
+}
+
void vm_stop(int reason)
{
QemuThread me;
@@ -863,10 +875,7 @@ void vm_stop(int reason)
* FIXME: should not return to device code in case
* vm_stop() has been requested.
*/
- if (cpu_single_env) {
- cpu_exit(cpu_single_env);
- cpu_single_env->stop = 1;
- }
+ cpu_stop_current();
return;
}
do_vm_stop(reason);
diff --git a/cpus.h b/cpus.h
index bf4d9bb..4cadb64 100644
--- a/cpus.h
+++ b/cpus.h
@@ -6,6 +6,7 @@ int qemu_init_main_loop(void);
void qemu_main_loop_start(void);
void resume_all_vcpus(void);
void pause_all_vcpus(void);
+void cpu_stop_current(void);
/* vl.c */
extern int smp_cores;
diff --git a/vl.c b/vl.c
index ed2cdfa..5e3f7f2 100644
--- a/vl.c
+++ b/vl.c
@@ -1296,6 +1296,7 @@ void qemu_system_reset_request(void)
} else {
reset_requested = 1;
}
+ cpu_stop_current();
qemu_notify_event();
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 03/37] Process vmstop requests in IO thread
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
A pending vmstop request is also a reason to leave the inner main loop.
So far we ignored it, and pending stop requests issued over VCPU threads
were simply ignored.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 14 +++++---------
1 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/vl.c b/vl.c
index 5e3f7f2..30263d6 100644
--- a/vl.c
+++ b/vl.c
@@ -1391,15 +1391,11 @@ void main_loop_wait(int nonblocking)
static int vm_can_run(void)
{
- if (powerdown_requested)
- return 0;
- if (reset_requested)
- return 0;
- if (shutdown_requested)
- return 0;
- if (debug_requested)
- return 0;
- return 1;
+ return !(powerdown_requested ||
+ reset_requested ||
+ shutdown_requested ||
+ debug_requested ||
+ vmstop_requested);
}
qemu_irq qemu_system_powerdown;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 03/37] Process vmstop requests in IO thread
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
A pending vmstop request is also a reason to leave the inner main loop.
So far we ignored it, and pending stop requests issued over VCPU threads
were simply ignored.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 14 +++++---------
1 files changed, 5 insertions(+), 9 deletions(-)
diff --git a/vl.c b/vl.c
index 5e3f7f2..30263d6 100644
--- a/vl.c
+++ b/vl.c
@@ -1391,15 +1391,11 @@ void main_loop_wait(int nonblocking)
static int vm_can_run(void)
{
- if (powerdown_requested)
- return 0;
- if (reset_requested)
- return 0;
- if (shutdown_requested)
- return 0;
- if (debug_requested)
- return 0;
- return 1;
+ return !(powerdown_requested ||
+ reset_requested ||
+ shutdown_requested ||
+ debug_requested ||
+ vmstop_requested);
}
qemu_irq qemu_system_powerdown;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 04/37] Trigger exit from cpu_exec_all on pending IO events
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Except for timer events, we currently do not leave the loop over all
VCPUs if an IO event was filed. That may cause unexpected IO latencies
under !CONFIG_IOTHREAD in SMP scenarios. Fix it by setting the global
exit_request which breaks the loop.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index f8a88e3..0abc009 100644
--- a/cpus.c
+++ b/cpus.c
@@ -307,6 +307,7 @@ void qemu_notify_event(void)
if (next_cpu && env != next_cpu) {
cpu_exit(next_cpu);
}
+ exit_request = 1;
}
void qemu_mutex_lock_iothread(void) {}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 04/37] Trigger exit from cpu_exec_all on pending IO events
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Except for timer events, we currently do not leave the loop over all
VCPUs if an IO event was filed. That may cause unexpected IO latencies
under !CONFIG_IOTHREAD in SMP scenarios. Fix it by setting the global
exit_request which breaks the loop.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index f8a88e3..0abc009 100644
--- a/cpus.c
+++ b/cpus.c
@@ -307,6 +307,7 @@ void qemu_notify_event(void)
if (next_cpu && env != next_cpu) {
cpu_exit(next_cpu);
}
+ exit_request = 1;
}
void qemu_mutex_lock_iothread(void) {}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 05/37] Leave inner main_loop faster on pending requests
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
If there is any pending request that requires us to leave the inner loop
if main_loop, makes sure we do this as soon as possible by enforcing
non-blocking IO processing.
At this change, move variable definitions out of the inner loop to
improve readability.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/vl.c b/vl.c
index 30263d6..9c628f0 100644
--- a/vl.c
+++ b/vl.c
@@ -1402,18 +1402,21 @@ qemu_irq qemu_system_powerdown;
static void main_loop(void)
{
+ bool nonblocking = false;
+#ifdef CONFIG_PROFILER
+ int64_t ti;
+#endif
int r;
qemu_main_loop_start();
for (;;) {
do {
- bool nonblocking = false;
-#ifdef CONFIG_PROFILER
- int64_t ti;
-#endif
#ifndef CONFIG_IOTHREAD
nonblocking = cpu_exec_all();
+ if (!vm_can_run()) {
+ nonblocking = true;
+ }
#endif
#ifdef CONFIG_PROFILER
ti = profile_getclock();
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 05/37] Leave inner main_loop faster on pending requests
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
If there is any pending request that requires us to leave the inner loop
if main_loop, makes sure we do this as soon as possible by enforcing
non-blocking IO processing.
At this change, move variable definitions out of the inner loop to
improve readability.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/vl.c b/vl.c
index 30263d6..9c628f0 100644
--- a/vl.c
+++ b/vl.c
@@ -1402,18 +1402,21 @@ qemu_irq qemu_system_powerdown;
static void main_loop(void)
{
+ bool nonblocking = false;
+#ifdef CONFIG_PROFILER
+ int64_t ti;
+#endif
int r;
qemu_main_loop_start();
for (;;) {
do {
- bool nonblocking = false;
-#ifdef CONFIG_PROFILER
- int64_t ti;
-#endif
#ifndef CONFIG_IOTHREAD
nonblocking = cpu_exec_all();
+ if (!vm_can_run()) {
+ nonblocking = true;
+ }
#endif
#ifdef CONFIG_PROFILER
ti = profile_getclock();
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 06/37] Flatten the main loop
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
First of all, vm_can_run is a misnomer, it actually means "no request
pending". Moreover, there is no need to check all pending requests
twice, the first time via the inner loop check and then again when
actually processing the requests. We can simply remove the inner loop
and do the checks directly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 30 +++++++++++++++---------------
1 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/vl.c b/vl.c
index 9c628f0..c9fa266 100644
--- a/vl.c
+++ b/vl.c
@@ -1389,14 +1389,16 @@ void main_loop_wait(int nonblocking)
}
-static int vm_can_run(void)
+#ifndef CONFIG_IOTHREAD
+static int vm_request_pending(void)
{
- return !(powerdown_requested ||
- reset_requested ||
- shutdown_requested ||
- debug_requested ||
- vmstop_requested);
+ return powerdown_requested ||
+ reset_requested ||
+ shutdown_requested ||
+ debug_requested ||
+ vmstop_requested;
}
+#endif
qemu_irq qemu_system_powerdown;
@@ -1411,21 +1413,19 @@ static void main_loop(void)
qemu_main_loop_start();
for (;;) {
- do {
#ifndef CONFIG_IOTHREAD
- nonblocking = cpu_exec_all();
- if (!vm_can_run()) {
- nonblocking = true;
- }
+ nonblocking = cpu_exec_all();
+ if (vm_request_pending()) {
+ nonblocking = true;
+ }
#endif
#ifdef CONFIG_PROFILER
- ti = profile_getclock();
+ ti = profile_getclock();
#endif
- main_loop_wait(nonblocking);
+ main_loop_wait(nonblocking);
#ifdef CONFIG_PROFILER
- dev_time += profile_getclock() - ti;
+ dev_time += profile_getclock() - ti;
#endif
- } while (vm_can_run());
if ((r = qemu_debug_requested())) {
vm_stop(r);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 06/37] Flatten the main loop
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
First of all, vm_can_run is a misnomer, it actually means "no request
pending". Moreover, there is no need to check all pending requests
twice, the first time via the inner loop check and then again when
actually processing the requests. We can simply remove the inner loop
and do the checks directly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
vl.c | 30 +++++++++++++++---------------
1 files changed, 15 insertions(+), 15 deletions(-)
diff --git a/vl.c b/vl.c
index 9c628f0..c9fa266 100644
--- a/vl.c
+++ b/vl.c
@@ -1389,14 +1389,16 @@ void main_loop_wait(int nonblocking)
}
-static int vm_can_run(void)
+#ifndef CONFIG_IOTHREAD
+static int vm_request_pending(void)
{
- return !(powerdown_requested ||
- reset_requested ||
- shutdown_requested ||
- debug_requested ||
- vmstop_requested);
+ return powerdown_requested ||
+ reset_requested ||
+ shutdown_requested ||
+ debug_requested ||
+ vmstop_requested;
}
+#endif
qemu_irq qemu_system_powerdown;
@@ -1411,21 +1413,19 @@ static void main_loop(void)
qemu_main_loop_start();
for (;;) {
- do {
#ifndef CONFIG_IOTHREAD
- nonblocking = cpu_exec_all();
- if (!vm_can_run()) {
- nonblocking = true;
- }
+ nonblocking = cpu_exec_all();
+ if (vm_request_pending()) {
+ nonblocking = true;
+ }
#endif
#ifdef CONFIG_PROFILER
- ti = profile_getclock();
+ ti = profile_getclock();
#endif
- main_loop_wait(nonblocking);
+ main_loop_wait(nonblocking);
#ifdef CONFIG_PROFILER
- dev_time += profile_getclock() - ti;
+ dev_time += profile_getclock() - ti;
#endif
- } while (vm_can_run());
if ((r = qemu_debug_requested())) {
vm_stop(r);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 07/37] kvm: Report proper error on GET_VCPU_MMAP_SIZE failures
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 2ec9e09..55f6ac3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -219,6 +219,7 @@ int kvm_init_vcpu(CPUState *env)
mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
if (mmap_size < 0) {
+ ret = mmap_size;
DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
goto err;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 07/37] kvm: Report proper error on GET_VCPU_MMAP_SIZE failures
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 2ec9e09..55f6ac3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -219,6 +219,7 @@ int kvm_init_vcpu(CPUState *env)
mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
if (mmap_size < 0) {
+ ret = mmap_size;
DPRINTF("KVM_GET_VCPU_MMAP_SIZE failed\n");
goto err;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 08/37] kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 0abc009..8232d44 100644
--- a/cpus.c
+++ b/cpus.c
@@ -603,8 +603,8 @@ static void *kvm_cpu_thread_fn(void *arg)
qemu_mutex_lock(&qemu_global_mutex);
qemu_thread_self(env->thread);
- if (kvm_enabled())
- kvm_init_vcpu(env);
+
+ kvm_init_vcpu(env);
kvm_init_ipi(env);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 08/37] kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 0abc009..8232d44 100644
--- a/cpus.c
+++ b/cpus.c
@@ -603,8 +603,8 @@ static void *kvm_cpu_thread_fn(void *arg)
qemu_mutex_lock(&qemu_global_mutex);
qemu_thread_self(env->thread);
- if (kvm_enabled())
- kvm_init_vcpu(env);
+
+ kvm_init_vcpu(env);
kvm_init_ipi(env);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 09/37] kvm: Handle kvm_init_vcpu errors
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Do not ignore errors of kvm_init_vcpu, they are fatal.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 19 +++++++++++++++----
1 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/cpus.c b/cpus.c
index 8232d44..3a72d06 100644
--- a/cpus.c
+++ b/cpus.c
@@ -265,12 +265,18 @@ void qemu_main_loop_start(void)
void qemu_init_vcpu(void *_env)
{
CPUState *env = _env;
+ int r;
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
- if (kvm_enabled())
- kvm_init_vcpu(env);
- return;
+
+ if (kvm_enabled()) {
+ r = kvm_init_vcpu(env);
+ if (r < 0) {
+ fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
+ }
}
int qemu_cpu_self(void *env)
@@ -600,11 +606,16 @@ static int qemu_cpu_exec(CPUState *env);
static void *kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
+ int r;
qemu_mutex_lock(&qemu_global_mutex);
qemu_thread_self(env->thread);
- kvm_init_vcpu(env);
+ r = kvm_init_vcpu(env);
+ if (r < 0) {
+ fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
kvm_init_ipi(env);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 09/37] kvm: Handle kvm_init_vcpu errors
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Do not ignore errors of kvm_init_vcpu, they are fatal.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 19 +++++++++++++++----
1 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/cpus.c b/cpus.c
index 8232d44..3a72d06 100644
--- a/cpus.c
+++ b/cpus.c
@@ -265,12 +265,18 @@ void qemu_main_loop_start(void)
void qemu_init_vcpu(void *_env)
{
CPUState *env = _env;
+ int r;
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
- if (kvm_enabled())
- kvm_init_vcpu(env);
- return;
+
+ if (kvm_enabled()) {
+ r = kvm_init_vcpu(env);
+ if (r < 0) {
+ fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
+ }
}
int qemu_cpu_self(void *env)
@@ -600,11 +606,16 @@ static int qemu_cpu_exec(CPUState *env);
static void *kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
+ int r;
qemu_mutex_lock(&qemu_global_mutex);
qemu_thread_self(env->thread);
- kvm_init_vcpu(env);
+ r = kvm_init_vcpu(env);
+ if (r < 0) {
+ fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
+ exit(1);
+ }
kvm_init_ipi(env);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 10/37] kvm: Provide sigbus services arch-independently
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery
from cpus.c. This patch also fixes --disable-kvm build by providing the
missing kvm_on_sigbus_vcpu kvm-stub.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 10 ++++------
kvm-all.c | 10 ++++++++++
kvm-stub.c | 5 +++++
kvm.h | 7 +++++--
target-i386/kvm.c | 4 ++--
target-ppc/kvm.c | 10 ++++++++++
target-s390x/kvm.c | 10 ++++++++++
7 files changed, 46 insertions(+), 10 deletions(-)
diff --git a/cpus.c b/cpus.c
index 3a72d06..4975317 100644
--- a/cpus.c
+++ b/cpus.c
@@ -539,10 +539,9 @@ static void sigbus_reraise(void)
static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
void *ctx)
{
-#if defined(TARGET_I386)
- if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr))
-#endif
+ if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr)) {
sigbus_reraise();
+ }
}
static void qemu_kvm_eat_signal(CPUState *env, int timeout)
@@ -575,10 +574,9 @@ static void qemu_kvm_eat_signal(CPUState *env, int timeout)
switch (r) {
case SIGBUS:
-#ifdef TARGET_I386
- if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr))
-#endif
+ if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
sigbus_reraise();
+ }
break;
default:
break;
diff --git a/kvm-all.c b/kvm-all.c
index 55f6ac3..a83aff2 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1366,3 +1366,13 @@ int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
return -ENOSYS;
#endif
}
+
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return kvm_arch_on_sigbus_vcpu(env, code, addr);
+}
+
+int kvm_on_sigbus(int code, void *addr)
+{
+ return kvm_arch_on_sigbus(code, addr);
+}
diff --git a/kvm-stub.c b/kvm-stub.c
index 88682f2..d6b6c8e 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -147,6 +147,11 @@ int kvm_set_ioeventfd_mmio_long(int fd, uint32_t adr, uint32_t val, bool assign)
return -ENOSYS;
}
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
int kvm_on_sigbus(int code, void *addr)
{
return 1;
diff --git a/kvm.h b/kvm.h
index ca57517..b2fb5c6 100644
--- a/kvm.h
+++ b/kvm.h
@@ -81,6 +81,9 @@ int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset);
int kvm_pit_in_kernel(void);
int kvm_irqchip_in_kernel(void);
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr);
+int kvm_on_sigbus(int code, void *addr);
+
/* internal API */
struct KVMState;
@@ -121,8 +124,8 @@ int kvm_arch_init_vcpu(CPUState *env);
void kvm_arch_reset_vcpu(CPUState *env);
-int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr);
-int kvm_on_sigbus(int code, void *addr);
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr);
+int kvm_arch_on_sigbus(int code, void *addr);
struct kvm_guest_debug;
struct kvm_debug_exit_arch;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 05010bb..9df8ff8 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1839,7 +1839,7 @@ static void kvm_mce_inj_srao_memscrub2(CPUState *env, target_phys_addr_t paddr)
#endif
-int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
{
#if defined(KVM_CAP_MCE)
void *vaddr;
@@ -1889,7 +1889,7 @@ int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
return 0;
}
-int kvm_on_sigbus(int code, void *addr)
+int kvm_arch_on_sigbus(int code, void *addr)
{
#if defined(KVM_CAP_MCE)
if ((first_cpu->mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) {
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 710eca1..93ecc57 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -404,3 +404,13 @@ bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
return true;
}
+
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
+int kvm_arch_on_sigbus(int code, void *addr)
+{
+ return 1;
+}
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 38823f5..1702c46 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -505,3 +505,13 @@ bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
return true;
}
+
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
+int kvm_arch_on_sigbus(int code, void *addr)
+{
+ return 1;
+}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 10/37] kvm: Provide sigbus services arch-independently
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery
from cpus.c. This patch also fixes --disable-kvm build by providing the
missing kvm_on_sigbus_vcpu kvm-stub.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 10 ++++------
kvm-all.c | 10 ++++++++++
kvm-stub.c | 5 +++++
kvm.h | 7 +++++--
target-i386/kvm.c | 4 ++--
target-ppc/kvm.c | 10 ++++++++++
target-s390x/kvm.c | 10 ++++++++++
7 files changed, 46 insertions(+), 10 deletions(-)
diff --git a/cpus.c b/cpus.c
index 3a72d06..4975317 100644
--- a/cpus.c
+++ b/cpus.c
@@ -539,10 +539,9 @@ static void sigbus_reraise(void)
static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
void *ctx)
{
-#if defined(TARGET_I386)
- if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr))
-#endif
+ if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr)) {
sigbus_reraise();
+ }
}
static void qemu_kvm_eat_signal(CPUState *env, int timeout)
@@ -575,10 +574,9 @@ static void qemu_kvm_eat_signal(CPUState *env, int timeout)
switch (r) {
case SIGBUS:
-#ifdef TARGET_I386
- if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr))
-#endif
+ if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
sigbus_reraise();
+ }
break;
default:
break;
diff --git a/kvm-all.c b/kvm-all.c
index 55f6ac3..a83aff2 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1366,3 +1366,13 @@ int kvm_set_ioeventfd_pio_word(int fd, uint16_t addr, uint16_t val, bool assign)
return -ENOSYS;
#endif
}
+
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return kvm_arch_on_sigbus_vcpu(env, code, addr);
+}
+
+int kvm_on_sigbus(int code, void *addr)
+{
+ return kvm_arch_on_sigbus(code, addr);
+}
diff --git a/kvm-stub.c b/kvm-stub.c
index 88682f2..d6b6c8e 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -147,6 +147,11 @@ int kvm_set_ioeventfd_mmio_long(int fd, uint32_t adr, uint32_t val, bool assign)
return -ENOSYS;
}
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
int kvm_on_sigbus(int code, void *addr)
{
return 1;
diff --git a/kvm.h b/kvm.h
index ca57517..b2fb5c6 100644
--- a/kvm.h
+++ b/kvm.h
@@ -81,6 +81,9 @@ int kvm_set_signal_mask(CPUState *env, const sigset_t *sigset);
int kvm_pit_in_kernel(void);
int kvm_irqchip_in_kernel(void);
+int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr);
+int kvm_on_sigbus(int code, void *addr);
+
/* internal API */
struct KVMState;
@@ -121,8 +124,8 @@ int kvm_arch_init_vcpu(CPUState *env);
void kvm_arch_reset_vcpu(CPUState *env);
-int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr);
-int kvm_on_sigbus(int code, void *addr);
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr);
+int kvm_arch_on_sigbus(int code, void *addr);
struct kvm_guest_debug;
struct kvm_debug_exit_arch;
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 05010bb..9df8ff8 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1839,7 +1839,7 @@ static void kvm_mce_inj_srao_memscrub2(CPUState *env, target_phys_addr_t paddr)
#endif
-int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
{
#if defined(KVM_CAP_MCE)
void *vaddr;
@@ -1889,7 +1889,7 @@ int kvm_on_sigbus_vcpu(CPUState *env, int code, void *addr)
return 0;
}
-int kvm_on_sigbus(int code, void *addr)
+int kvm_arch_on_sigbus(int code, void *addr)
{
#if defined(KVM_CAP_MCE)
if ((first_cpu->mcg_cap & MCG_SER_P) && addr && code == BUS_MCEERR_AO) {
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 710eca1..93ecc57 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -404,3 +404,13 @@ bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
return true;
}
+
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
+int kvm_arch_on_sigbus(int code, void *addr)
+{
+ return 1;
+}
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 38823f5..1702c46 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -505,3 +505,13 @@ bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
return true;
}
+
+int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr)
+{
+ return 1;
+}
+
+int kvm_arch_on_sigbus(int code, void *addr)
+{
+ return 1;
+}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 11/37] Refactor signal setup functions in cpus.c
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Move {tcg,kvm}_init_ipi and block_io_signals to avoid prototypes, rename
the former two to clarify that they deal with more than SIG_IPI. No
functional changes - except for the tiny fixup of strerror usage.
The forward declaration of sigbus_handler is just temporarily, it will
be moved in a succeeding patch. dummy_signal is moved into the !_WIN32
block as we will soon need it also for !CONFIG_IOTHREAD.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 162 +++++++++++++++++++++++++++++++++-------------------------------
1 files changed, 83 insertions(+), 79 deletions(-)
diff --git a/cpus.c b/cpus.c
index 4975317..62120c4 100644
--- a/cpus.c
+++ b/cpus.c
@@ -222,7 +222,15 @@ fail:
close(fds[1]);
return err;
}
-#else
+
+#ifdef CONFIG_IOTHREAD
+static void dummy_signal(int sig)
+{
+}
+#endif
+
+#else /* _WIN32 */
+
HANDLE qemu_event_handle;
static void dummy_event_handler(void *opaque)
@@ -248,7 +256,7 @@ static void qemu_event_increment(void)
exit (1);
}
}
-#endif
+#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
int qemu_init_main_loop(void)
@@ -348,10 +356,6 @@ static QemuCond qemu_system_cond;
static QemuCond qemu_pause_cond;
static QemuCond qemu_work_cond;
-static void tcg_init_ipi(void);
-static void kvm_init_ipi(CPUState *env);
-static sigset_t block_io_signals(void);
-
/* If we have signalfd, we mask out the signals we want to handle and then
* use signalfd to listen for them. We rely on whatever the current signal
* handler is to dispatch the signals when we receive them.
@@ -387,6 +391,77 @@ static void sigfd_handler(void *opaque)
}
}
+static void cpu_signal(int sig)
+{
+ if (cpu_single_env) {
+ cpu_exit(cpu_single_env);
+ }
+ exit_request = 1;
+}
+
+static void qemu_kvm_init_cpu_signals(CPUState *env)
+{
+ int r;
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = dummy_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ pthread_sigmask(SIG_BLOCK, NULL, &set);
+ sigdelset(&set, SIG_IPI);
+ sigdelset(&set, SIGBUS);
+ r = kvm_set_signal_mask(env, &set);
+ if (r) {
+ fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+ exit(1);
+ }
+}
+
+static void qemu_tcg_init_cpu_signals(void)
+{
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = cpu_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIG_IPI);
+ pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
+
+static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
+ void *ctx);
+
+static sigset_t block_io_signals(void)
+{
+ sigset_t set;
+ struct sigaction action;
+
+ /* SIGUSR2 used by posix-aio-compat.c */
+ sigemptyset(&set);
+ sigaddset(&set, SIGUSR2);
+ pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
+ sigaddset(&set, SIG_IPI);
+ sigaddset(&set, SIGBUS);
+ pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+ memset(&action, 0, sizeof(action));
+ action.sa_flags = SA_SIGINFO;
+ action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
+ sigaction(SIGBUS, &action, NULL);
+ prctl(PR_MCE_KILL, 1, 1, 0, 0);
+
+ return set;
+}
+
static int qemu_signalfd_init(sigset_t mask)
{
int sigfd;
@@ -615,7 +690,7 @@ static void *kvm_cpu_thread_fn(void *arg)
exit(1);
}
- kvm_init_ipi(env);
+ qemu_kvm_init_cpu_signals(env);
/* signal CPU creation */
env->created = 1;
@@ -638,7 +713,7 @@ static void *tcg_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
- tcg_init_ipi();
+ qemu_tcg_init_cpu_signals();
qemu_thread_self(env->thread);
/* signal CPU creation */
@@ -679,77 +754,6 @@ int qemu_cpu_self(void *_env)
return qemu_thread_equal(&this, env->thread);
}
-static void cpu_signal(int sig)
-{
- if (cpu_single_env)
- cpu_exit(cpu_single_env);
- exit_request = 1;
-}
-
-static void tcg_init_ipi(void)
-{
- sigset_t set;
- struct sigaction sigact;
-
- memset(&sigact, 0, sizeof(sigact));
- sigact.sa_handler = cpu_signal;
- sigaction(SIG_IPI, &sigact, NULL);
-
- sigemptyset(&set);
- sigaddset(&set, SIG_IPI);
- pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-}
-
-static void dummy_signal(int sig)
-{
-}
-
-static void kvm_init_ipi(CPUState *env)
-{
- int r;
- sigset_t set;
- struct sigaction sigact;
-
- memset(&sigact, 0, sizeof(sigact));
- sigact.sa_handler = dummy_signal;
- sigaction(SIG_IPI, &sigact, NULL);
-
- pthread_sigmask(SIG_BLOCK, NULL, &set);
- sigdelset(&set, SIG_IPI);
- sigdelset(&set, SIGBUS);
- r = kvm_set_signal_mask(env, &set);
- if (r) {
- fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(r));
- exit(1);
- }
-}
-
-static sigset_t block_io_signals(void)
-{
- sigset_t set;
- struct sigaction action;
-
- /* SIGUSR2 used by posix-aio-compat.c */
- sigemptyset(&set);
- sigaddset(&set, SIGUSR2);
- pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-
- sigemptyset(&set);
- sigaddset(&set, SIGIO);
- sigaddset(&set, SIGALRM);
- sigaddset(&set, SIG_IPI);
- sigaddset(&set, SIGBUS);
- pthread_sigmask(SIG_BLOCK, &set, NULL);
-
- memset(&action, 0, sizeof(action));
- action.sa_flags = SA_SIGINFO;
- action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
- sigaction(SIGBUS, &action, NULL);
- prctl(PR_MCE_KILL, 1, 1, 0, 0);
-
- return set;
-}
-
void qemu_mutex_lock_iothread(void)
{
if (kvm_enabled()) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 11/37] Refactor signal setup functions in cpus.c
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Move {tcg,kvm}_init_ipi and block_io_signals to avoid prototypes, rename
the former two to clarify that they deal with more than SIG_IPI. No
functional changes - except for the tiny fixup of strerror usage.
The forward declaration of sigbus_handler is just temporarily, it will
be moved in a succeeding patch. dummy_signal is moved into the !_WIN32
block as we will soon need it also for !CONFIG_IOTHREAD.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 162 +++++++++++++++++++++++++++++++++-------------------------------
1 files changed, 83 insertions(+), 79 deletions(-)
diff --git a/cpus.c b/cpus.c
index 4975317..62120c4 100644
--- a/cpus.c
+++ b/cpus.c
@@ -222,7 +222,15 @@ fail:
close(fds[1]);
return err;
}
-#else
+
+#ifdef CONFIG_IOTHREAD
+static void dummy_signal(int sig)
+{
+}
+#endif
+
+#else /* _WIN32 */
+
HANDLE qemu_event_handle;
static void dummy_event_handler(void *opaque)
@@ -248,7 +256,7 @@ static void qemu_event_increment(void)
exit (1);
}
}
-#endif
+#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
int qemu_init_main_loop(void)
@@ -348,10 +356,6 @@ static QemuCond qemu_system_cond;
static QemuCond qemu_pause_cond;
static QemuCond qemu_work_cond;
-static void tcg_init_ipi(void);
-static void kvm_init_ipi(CPUState *env);
-static sigset_t block_io_signals(void);
-
/* If we have signalfd, we mask out the signals we want to handle and then
* use signalfd to listen for them. We rely on whatever the current signal
* handler is to dispatch the signals when we receive them.
@@ -387,6 +391,77 @@ static void sigfd_handler(void *opaque)
}
}
+static void cpu_signal(int sig)
+{
+ if (cpu_single_env) {
+ cpu_exit(cpu_single_env);
+ }
+ exit_request = 1;
+}
+
+static void qemu_kvm_init_cpu_signals(CPUState *env)
+{
+ int r;
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = dummy_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ pthread_sigmask(SIG_BLOCK, NULL, &set);
+ sigdelset(&set, SIG_IPI);
+ sigdelset(&set, SIGBUS);
+ r = kvm_set_signal_mask(env, &set);
+ if (r) {
+ fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+ exit(1);
+ }
+}
+
+static void qemu_tcg_init_cpu_signals(void)
+{
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = cpu_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIG_IPI);
+ pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+}
+
+static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
+ void *ctx);
+
+static sigset_t block_io_signals(void)
+{
+ sigset_t set;
+ struct sigaction action;
+
+ /* SIGUSR2 used by posix-aio-compat.c */
+ sigemptyset(&set);
+ sigaddset(&set, SIGUSR2);
+ pthread_sigmask(SIG_UNBLOCK, &set, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
+ sigaddset(&set, SIG_IPI);
+ sigaddset(&set, SIGBUS);
+ pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+ memset(&action, 0, sizeof(action));
+ action.sa_flags = SA_SIGINFO;
+ action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
+ sigaction(SIGBUS, &action, NULL);
+ prctl(PR_MCE_KILL, 1, 1, 0, 0);
+
+ return set;
+}
+
static int qemu_signalfd_init(sigset_t mask)
{
int sigfd;
@@ -615,7 +690,7 @@ static void *kvm_cpu_thread_fn(void *arg)
exit(1);
}
- kvm_init_ipi(env);
+ qemu_kvm_init_cpu_signals(env);
/* signal CPU creation */
env->created = 1;
@@ -638,7 +713,7 @@ static void *tcg_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
- tcg_init_ipi();
+ qemu_tcg_init_cpu_signals();
qemu_thread_self(env->thread);
/* signal CPU creation */
@@ -679,77 +754,6 @@ int qemu_cpu_self(void *_env)
return qemu_thread_equal(&this, env->thread);
}
-static void cpu_signal(int sig)
-{
- if (cpu_single_env)
- cpu_exit(cpu_single_env);
- exit_request = 1;
-}
-
-static void tcg_init_ipi(void)
-{
- sigset_t set;
- struct sigaction sigact;
-
- memset(&sigact, 0, sizeof(sigact));
- sigact.sa_handler = cpu_signal;
- sigaction(SIG_IPI, &sigact, NULL);
-
- sigemptyset(&set);
- sigaddset(&set, SIG_IPI);
- pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-}
-
-static void dummy_signal(int sig)
-{
-}
-
-static void kvm_init_ipi(CPUState *env)
-{
- int r;
- sigset_t set;
- struct sigaction sigact;
-
- memset(&sigact, 0, sizeof(sigact));
- sigact.sa_handler = dummy_signal;
- sigaction(SIG_IPI, &sigact, NULL);
-
- pthread_sigmask(SIG_BLOCK, NULL, &set);
- sigdelset(&set, SIG_IPI);
- sigdelset(&set, SIGBUS);
- r = kvm_set_signal_mask(env, &set);
- if (r) {
- fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(r));
- exit(1);
- }
-}
-
-static sigset_t block_io_signals(void)
-{
- sigset_t set;
- struct sigaction action;
-
- /* SIGUSR2 used by posix-aio-compat.c */
- sigemptyset(&set);
- sigaddset(&set, SIGUSR2);
- pthread_sigmask(SIG_UNBLOCK, &set, NULL);
-
- sigemptyset(&set);
- sigaddset(&set, SIGIO);
- sigaddset(&set, SIGALRM);
- sigaddset(&set, SIG_IPI);
- sigaddset(&set, SIGBUS);
- pthread_sigmask(SIG_BLOCK, &set, NULL);
-
- memset(&action, 0, sizeof(action));
- action.sa_flags = SA_SIGINFO;
- action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
- sigaction(SIGBUS, &action, NULL);
- prctl(PR_MCE_KILL, 1, 1, 0, 0);
-
- return set;
-}
-
void qemu_mutex_lock_iothread(void)
{
if (kvm_enabled()) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 12/37] kvm: Set up signal mask also for !CONFIG_IOTHREAD
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Block SIG_IPI, unblock it during KVM_RUN, just like in io-thread mode.
It's unused so far, but this infrastructure will be required for
self-IPIs and to process SIGBUS plus, in KVM mode, SIGIO and SIGALRM. As
Windows doesn't support signal services, we need to provide a stub for
the init function.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 29 +++++++++++++++++++++++++++--
1 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 62120c4..f27dfbd 100644
--- a/cpus.c
+++ b/cpus.c
@@ -223,11 +223,9 @@ fail:
return err;
}
-#ifdef CONFIG_IOTHREAD
static void dummy_signal(int sig)
{
}
-#endif
#else /* _WIN32 */
@@ -259,6 +257,32 @@ static void qemu_event_increment(void)
#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
+static void qemu_kvm_init_cpu_signals(CPUState *env)
+{
+#ifndef _WIN32
+ int r;
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = dummy_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIG_IPI);
+ pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+ pthread_sigmask(SIG_BLOCK, NULL, &set);
+ sigdelset(&set, SIG_IPI);
+ sigdelset(&set, SIGBUS);
+ r = kvm_set_signal_mask(env, &set);
+ if (r) {
+ fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+ exit(1);
+ }
+#endif
+}
+
int qemu_init_main_loop(void)
{
cpu_set_debug_excp_handler(cpu_debug_handler);
@@ -284,6 +308,7 @@ void qemu_init_vcpu(void *_env)
fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
exit(1);
}
+ qemu_kvm_init_cpu_signals(env);
}
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 12/37] kvm: Set up signal mask also for !CONFIG_IOTHREAD
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Block SIG_IPI, unblock it during KVM_RUN, just like in io-thread mode.
It's unused so far, but this infrastructure will be required for
self-IPIs and to process SIGBUS plus, in KVM mode, SIGIO and SIGALRM. As
Windows doesn't support signal services, we need to provide a stub for
the init function.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 29 +++++++++++++++++++++++++++--
1 files changed, 27 insertions(+), 2 deletions(-)
diff --git a/cpus.c b/cpus.c
index 62120c4..f27dfbd 100644
--- a/cpus.c
+++ b/cpus.c
@@ -223,11 +223,9 @@ fail:
return err;
}
-#ifdef CONFIG_IOTHREAD
static void dummy_signal(int sig)
{
}
-#endif
#else /* _WIN32 */
@@ -259,6 +257,32 @@ static void qemu_event_increment(void)
#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
+static void qemu_kvm_init_cpu_signals(CPUState *env)
+{
+#ifndef _WIN32
+ int r;
+ sigset_t set;
+ struct sigaction sigact;
+
+ memset(&sigact, 0, sizeof(sigact));
+ sigact.sa_handler = dummy_signal;
+ sigaction(SIG_IPI, &sigact, NULL);
+
+ sigemptyset(&set);
+ sigaddset(&set, SIG_IPI);
+ pthread_sigmask(SIG_BLOCK, &set, NULL);
+
+ pthread_sigmask(SIG_BLOCK, NULL, &set);
+ sigdelset(&set, SIG_IPI);
+ sigdelset(&set, SIGBUS);
+ r = kvm_set_signal_mask(env, &set);
+ if (r) {
+ fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
+ exit(1);
+ }
+#endif
+}
+
int qemu_init_main_loop(void)
{
cpu_set_debug_excp_handler(cpu_debug_handler);
@@ -284,6 +308,7 @@ void qemu_init_vcpu(void *_env)
fprintf(stderr, "kvm_init_vcpu failed: %s\n", strerror(-r));
exit(1);
}
+ qemu_kvm_init_cpu_signals(env);
}
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 13/37] kvm: Refactor qemu_kvm_eat_signals
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not use the timeout, so drop its logic. As we always poll our
signals, we do not need to drop the global lock. Removing those calls
allows some further simplifications. Also fix the error processing of
sigpending at this chance.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 23 +++++++----------------
1 files changed, 7 insertions(+), 16 deletions(-)
diff --git a/cpus.c b/cpus.c
index f27dfbd..d9c9111 100644
--- a/cpus.c
+++ b/cpus.c
@@ -644,31 +644,22 @@ static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
}
}
-static void qemu_kvm_eat_signal(CPUState *env, int timeout)
+static void qemu_kvm_eat_signals(CPUState *env)
{
- struct timespec ts;
- int r, e;
+ struct timespec ts = { 0, 0 };
siginfo_t siginfo;
sigset_t waitset;
sigset_t chkset;
-
- ts.tv_sec = timeout / 1000;
- ts.tv_nsec = (timeout % 1000) * 1000000;
+ int r;
sigemptyset(&waitset);
sigaddset(&waitset, SIG_IPI);
sigaddset(&waitset, SIGBUS);
do {
- qemu_mutex_unlock(&qemu_global_mutex);
-
r = sigtimedwait(&waitset, &siginfo, &ts);
- e = errno;
-
- qemu_mutex_lock(&qemu_global_mutex);
-
- if (r == -1 && !(e == EAGAIN || e == EINTR)) {
- fprintf(stderr, "sigtimedwait: %s\n", strerror(e));
+ if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
+ perror("sigtimedwait");
exit(1);
}
@@ -684,7 +675,7 @@ static void qemu_kvm_eat_signal(CPUState *env, int timeout)
r = sigpending(&chkset);
if (r == -1) {
- fprintf(stderr, "sigpending: %s\n", strerror(e));
+ perror("sigpending");
exit(1);
}
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
@@ -695,7 +686,7 @@ static void qemu_kvm_wait_io_event(CPUState *env)
while (!cpu_has_work(env))
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
- qemu_kvm_eat_signal(env, 0);
+ qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(env);
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 13/37] kvm: Refactor qemu_kvm_eat_signals
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not use the timeout, so drop its logic. As we always poll our
signals, we do not need to drop the global lock. Removing those calls
allows some further simplifications. Also fix the error processing of
sigpending at this chance.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 23 +++++++----------------
1 files changed, 7 insertions(+), 16 deletions(-)
diff --git a/cpus.c b/cpus.c
index f27dfbd..d9c9111 100644
--- a/cpus.c
+++ b/cpus.c
@@ -644,31 +644,22 @@ static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
}
}
-static void qemu_kvm_eat_signal(CPUState *env, int timeout)
+static void qemu_kvm_eat_signals(CPUState *env)
{
- struct timespec ts;
- int r, e;
+ struct timespec ts = { 0, 0 };
siginfo_t siginfo;
sigset_t waitset;
sigset_t chkset;
-
- ts.tv_sec = timeout / 1000;
- ts.tv_nsec = (timeout % 1000) * 1000000;
+ int r;
sigemptyset(&waitset);
sigaddset(&waitset, SIG_IPI);
sigaddset(&waitset, SIGBUS);
do {
- qemu_mutex_unlock(&qemu_global_mutex);
-
r = sigtimedwait(&waitset, &siginfo, &ts);
- e = errno;
-
- qemu_mutex_lock(&qemu_global_mutex);
-
- if (r == -1 && !(e == EAGAIN || e == EINTR)) {
- fprintf(stderr, "sigtimedwait: %s\n", strerror(e));
+ if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
+ perror("sigtimedwait");
exit(1);
}
@@ -684,7 +675,7 @@ static void qemu_kvm_eat_signal(CPUState *env, int timeout)
r = sigpending(&chkset);
if (r == -1) {
- fprintf(stderr, "sigpending: %s\n", strerror(e));
+ perror("sigpending");
exit(1);
}
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
@@ -695,7 +686,7 @@ static void qemu_kvm_wait_io_event(CPUState *env)
while (!cpu_has_work(env))
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
- qemu_kvm_eat_signal(env, 0);
+ qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(env);
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 14/37] kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Move qemu_kvm_eat_signals around and call it also when the IO-thread is
not used. Do not yet process SIGBUS, will be armed in a separate step.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 90 +++++++++++++++++++++++++++++++++++++---------------------------
1 files changed, 52 insertions(+), 38 deletions(-)
diff --git a/cpus.c b/cpus.c
index d9c9111..f2ec74c 100644
--- a/cpus.c
+++ b/cpus.c
@@ -227,6 +227,47 @@ static void dummy_signal(int sig)
{
}
+static void sigbus_reraise(void);
+
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+ struct timespec ts = { 0, 0 };
+ siginfo_t siginfo;
+ sigset_t waitset;
+ sigset_t chkset;
+ int r;
+
+ sigemptyset(&waitset);
+ sigaddset(&waitset, SIG_IPI);
+ sigaddset(&waitset, SIGBUS);
+
+ do {
+ r = sigtimedwait(&waitset, &siginfo, &ts);
+ if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
+ perror("sigtimedwait");
+ exit(1);
+ }
+
+ switch (r) {
+#ifdef CONFIG_IOTHREAD
+ case SIGBUS:
+ if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
+ sigbus_reraise();
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+
+ r = sigpending(&chkset);
+ if (r == -1) {
+ perror("sigpending");
+ exit(1);
+ }
+ } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+}
+
#else /* _WIN32 */
HANDLE qemu_event_handle;
@@ -254,6 +295,10 @@ static void qemu_event_increment(void)
exit (1);
}
}
+
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+}
#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
@@ -644,43 +689,6 @@ static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
}
}
-static void qemu_kvm_eat_signals(CPUState *env)
-{
- struct timespec ts = { 0, 0 };
- siginfo_t siginfo;
- sigset_t waitset;
- sigset_t chkset;
- int r;
-
- sigemptyset(&waitset);
- sigaddset(&waitset, SIG_IPI);
- sigaddset(&waitset, SIGBUS);
-
- do {
- r = sigtimedwait(&waitset, &siginfo, &ts);
- if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
- perror("sigtimedwait");
- exit(1);
- }
-
- switch (r) {
- case SIGBUS:
- if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
- sigbus_reraise();
- }
- break;
- default:
- break;
- }
-
- r = sigpending(&chkset);
- if (r == -1) {
- perror("sigpending");
- exit(1);
- }
- } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
-}
-
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (!cpu_has_work(env))
@@ -953,6 +961,8 @@ static int qemu_cpu_exec(CPUState *env)
bool cpu_exec_all(void)
{
+ int r;
+
if (next_cpu == NULL)
next_cpu = first_cpu;
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
@@ -964,7 +974,11 @@ bool cpu_exec_all(void)
if (qemu_alarm_pending())
break;
if (cpu_can_run(env)) {
- if (qemu_cpu_exec(env) == EXCP_DEBUG) {
+ r = qemu_cpu_exec(env);
+ if (kvm_enabled()) {
+ qemu_kvm_eat_signals(env);
+ }
+ if (r == EXCP_DEBUG) {
break;
}
} else if (env->stop) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 14/37] kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Move qemu_kvm_eat_signals around and call it also when the IO-thread is
not used. Do not yet process SIGBUS, will be armed in a separate step.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 90 +++++++++++++++++++++++++++++++++++++---------------------------
1 files changed, 52 insertions(+), 38 deletions(-)
diff --git a/cpus.c b/cpus.c
index d9c9111..f2ec74c 100644
--- a/cpus.c
+++ b/cpus.c
@@ -227,6 +227,47 @@ static void dummy_signal(int sig)
{
}
+static void sigbus_reraise(void);
+
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+ struct timespec ts = { 0, 0 };
+ siginfo_t siginfo;
+ sigset_t waitset;
+ sigset_t chkset;
+ int r;
+
+ sigemptyset(&waitset);
+ sigaddset(&waitset, SIG_IPI);
+ sigaddset(&waitset, SIGBUS);
+
+ do {
+ r = sigtimedwait(&waitset, &siginfo, &ts);
+ if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
+ perror("sigtimedwait");
+ exit(1);
+ }
+
+ switch (r) {
+#ifdef CONFIG_IOTHREAD
+ case SIGBUS:
+ if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
+ sigbus_reraise();
+ }
+ break;
+#endif
+ default:
+ break;
+ }
+
+ r = sigpending(&chkset);
+ if (r == -1) {
+ perror("sigpending");
+ exit(1);
+ }
+ } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+}
+
#else /* _WIN32 */
HANDLE qemu_event_handle;
@@ -254,6 +295,10 @@ static void qemu_event_increment(void)
exit (1);
}
}
+
+static void qemu_kvm_eat_signals(CPUState *env)
+{
+}
#endif /* _WIN32 */
#ifndef CONFIG_IOTHREAD
@@ -644,43 +689,6 @@ static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
}
}
-static void qemu_kvm_eat_signals(CPUState *env)
-{
- struct timespec ts = { 0, 0 };
- siginfo_t siginfo;
- sigset_t waitset;
- sigset_t chkset;
- int r;
-
- sigemptyset(&waitset);
- sigaddset(&waitset, SIG_IPI);
- sigaddset(&waitset, SIGBUS);
-
- do {
- r = sigtimedwait(&waitset, &siginfo, &ts);
- if (r == -1 && !(errno == EAGAIN || errno == EINTR)) {
- perror("sigtimedwait");
- exit(1);
- }
-
- switch (r) {
- case SIGBUS:
- if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
- sigbus_reraise();
- }
- break;
- default:
- break;
- }
-
- r = sigpending(&chkset);
- if (r == -1) {
- perror("sigpending");
- exit(1);
- }
- } while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
-}
-
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (!cpu_has_work(env))
@@ -953,6 +961,8 @@ static int qemu_cpu_exec(CPUState *env)
bool cpu_exec_all(void)
{
+ int r;
+
if (next_cpu == NULL)
next_cpu = first_cpu;
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
@@ -964,7 +974,11 @@ bool cpu_exec_all(void)
if (qemu_alarm_pending())
break;
if (cpu_can_run(env)) {
- if (qemu_cpu_exec(env) == EXCP_DEBUG) {
+ r = qemu_cpu_exec(env);
+ if (kvm_enabled()) {
+ qemu_kvm_eat_signals(env);
+ }
+ if (r == EXCP_DEBUG) {
break;
}
} else if (env->stop) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 15/37] Set up signalfd under !CONFIG_IOTHREAD
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Will be required for SIGBUS handling. For obvious reasons, this will
remain a nop on Windows hosts.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
Makefile.objs | 2 +-
cpus.c | 117 +++++++++++++++++++++++++++++++--------------------------
2 files changed, 65 insertions(+), 54 deletions(-)
diff --git a/Makefile.objs b/Makefile.objs
index adb5842..b21f9d3 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -141,7 +141,7 @@ common-obj-y += $(addprefix ui/, $(ui-obj-y))
common-obj-y += iov.o acl.o
common-obj-$(CONFIG_THREAD) += qemu-thread.o
-common-obj-$(CONFIG_IOTHREAD) += compatfd.o
+common-obj-$(CONFIG_POSIX) += compatfd.o
common-obj-y += notify.o event_notifier.o
common-obj-y += qemu-timer.o qemu-timer-common.o
diff --git a/cpus.c b/cpus.c
index f2ec74c..84792f0 100644
--- a/cpus.c
+++ b/cpus.c
@@ -227,6 +227,59 @@ static void dummy_signal(int sig)
{
}
+/* If we have signalfd, we mask out the signals we want to handle and then
+ * use signalfd to listen for them. We rely on whatever the current signal
+ * handler is to dispatch the signals when we receive them.
+ */
+static void sigfd_handler(void *opaque)
+{
+ int fd = (unsigned long) opaque;
+ struct qemu_signalfd_siginfo info;
+ struct sigaction action;
+ ssize_t len;
+
+ while (1) {
+ do {
+ len = read(fd, &info, sizeof(info));
+ } while (len == -1 && errno == EINTR);
+
+ if (len == -1 && errno == EAGAIN) {
+ break;
+ }
+
+ if (len != sizeof(info)) {
+ printf("read from sigfd returned %zd: %m\n", len);
+ return;
+ }
+
+ sigaction(info.ssi_signo, NULL, &action);
+ if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
+ action.sa_sigaction(info.ssi_signo,
+ (siginfo_t *)&info, NULL);
+ } else if (action.sa_handler) {
+ action.sa_handler(info.ssi_signo);
+ }
+ }
+}
+
+static int qemu_signalfd_init(sigset_t mask)
+{
+ int sigfd;
+
+ sigfd = qemu_signalfd(&mask);
+ if (sigfd == -1) {
+ fprintf(stderr, "failed to create signalfd\n");
+ return -errno;
+ }
+
+ fcntl_setfl(sigfd, O_NONBLOCK);
+
+ qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
+ (void *)(unsigned long) sigfd);
+
+ return 0;
+}
+
static void sigbus_reraise(void);
static void qemu_kvm_eat_signals(CPUState *env)
@@ -330,6 +383,17 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
int qemu_init_main_loop(void)
{
+#ifndef _WIN32
+ sigset_t blocked_signals;
+ int ret;
+
+ sigemptyset(&blocked_signals);
+
+ ret = qemu_signalfd_init(blocked_signals);
+ if (ret) {
+ return ret;
+ }
+#endif
cpu_set_debug_excp_handler(cpu_debug_handler);
return qemu_event_init();
@@ -426,41 +490,6 @@ static QemuCond qemu_system_cond;
static QemuCond qemu_pause_cond;
static QemuCond qemu_work_cond;
-/* If we have signalfd, we mask out the signals we want to handle and then
- * use signalfd to listen for them. We rely on whatever the current signal
- * handler is to dispatch the signals when we receive them.
- */
-static void sigfd_handler(void *opaque)
-{
- int fd = (unsigned long) opaque;
- struct qemu_signalfd_siginfo info;
- struct sigaction action;
- ssize_t len;
-
- while (1) {
- do {
- len = read(fd, &info, sizeof(info));
- } while (len == -1 && errno == EINTR);
-
- if (len == -1 && errno == EAGAIN) {
- break;
- }
-
- if (len != sizeof(info)) {
- printf("read from sigfd returned %zd: %m\n", len);
- return;
- }
-
- sigaction(info.ssi_signo, NULL, &action);
- if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
- action.sa_sigaction(info.ssi_signo,
- (siginfo_t *)&info, NULL);
- } else if (action.sa_handler) {
- action.sa_handler(info.ssi_signo);
- }
- }
-}
-
static void cpu_signal(int sig)
{
if (cpu_single_env) {
@@ -532,24 +561,6 @@ static sigset_t block_io_signals(void)
return set;
}
-static int qemu_signalfd_init(sigset_t mask)
-{
- int sigfd;
-
- sigfd = qemu_signalfd(&mask);
- if (sigfd == -1) {
- fprintf(stderr, "failed to create signalfd\n");
- return -errno;
- }
-
- fcntl_setfl(sigfd, O_NONBLOCK);
-
- qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
- (void *)(unsigned long) sigfd);
-
- return 0;
-}
-
int qemu_init_main_loop(void)
{
int ret;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 15/37] Set up signalfd under !CONFIG_IOTHREAD
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Will be required for SIGBUS handling. For obvious reasons, this will
remain a nop on Windows hosts.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
Makefile.objs | 2 +-
cpus.c | 117 +++++++++++++++++++++++++++++++--------------------------
2 files changed, 65 insertions(+), 54 deletions(-)
diff --git a/Makefile.objs b/Makefile.objs
index adb5842..b21f9d3 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -141,7 +141,7 @@ common-obj-y += $(addprefix ui/, $(ui-obj-y))
common-obj-y += iov.o acl.o
common-obj-$(CONFIG_THREAD) += qemu-thread.o
-common-obj-$(CONFIG_IOTHREAD) += compatfd.o
+common-obj-$(CONFIG_POSIX) += compatfd.o
common-obj-y += notify.o event_notifier.o
common-obj-y += qemu-timer.o qemu-timer-common.o
diff --git a/cpus.c b/cpus.c
index f2ec74c..84792f0 100644
--- a/cpus.c
+++ b/cpus.c
@@ -227,6 +227,59 @@ static void dummy_signal(int sig)
{
}
+/* If we have signalfd, we mask out the signals we want to handle and then
+ * use signalfd to listen for them. We rely on whatever the current signal
+ * handler is to dispatch the signals when we receive them.
+ */
+static void sigfd_handler(void *opaque)
+{
+ int fd = (unsigned long) opaque;
+ struct qemu_signalfd_siginfo info;
+ struct sigaction action;
+ ssize_t len;
+
+ while (1) {
+ do {
+ len = read(fd, &info, sizeof(info));
+ } while (len == -1 && errno == EINTR);
+
+ if (len == -1 && errno == EAGAIN) {
+ break;
+ }
+
+ if (len != sizeof(info)) {
+ printf("read from sigfd returned %zd: %m\n", len);
+ return;
+ }
+
+ sigaction(info.ssi_signo, NULL, &action);
+ if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
+ action.sa_sigaction(info.ssi_signo,
+ (siginfo_t *)&info, NULL);
+ } else if (action.sa_handler) {
+ action.sa_handler(info.ssi_signo);
+ }
+ }
+}
+
+static int qemu_signalfd_init(sigset_t mask)
+{
+ int sigfd;
+
+ sigfd = qemu_signalfd(&mask);
+ if (sigfd == -1) {
+ fprintf(stderr, "failed to create signalfd\n");
+ return -errno;
+ }
+
+ fcntl_setfl(sigfd, O_NONBLOCK);
+
+ qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
+ (void *)(unsigned long) sigfd);
+
+ return 0;
+}
+
static void sigbus_reraise(void);
static void qemu_kvm_eat_signals(CPUState *env)
@@ -330,6 +383,17 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
int qemu_init_main_loop(void)
{
+#ifndef _WIN32
+ sigset_t blocked_signals;
+ int ret;
+
+ sigemptyset(&blocked_signals);
+
+ ret = qemu_signalfd_init(blocked_signals);
+ if (ret) {
+ return ret;
+ }
+#endif
cpu_set_debug_excp_handler(cpu_debug_handler);
return qemu_event_init();
@@ -426,41 +490,6 @@ static QemuCond qemu_system_cond;
static QemuCond qemu_pause_cond;
static QemuCond qemu_work_cond;
-/* If we have signalfd, we mask out the signals we want to handle and then
- * use signalfd to listen for them. We rely on whatever the current signal
- * handler is to dispatch the signals when we receive them.
- */
-static void sigfd_handler(void *opaque)
-{
- int fd = (unsigned long) opaque;
- struct qemu_signalfd_siginfo info;
- struct sigaction action;
- ssize_t len;
-
- while (1) {
- do {
- len = read(fd, &info, sizeof(info));
- } while (len == -1 && errno == EINTR);
-
- if (len == -1 && errno == EAGAIN) {
- break;
- }
-
- if (len != sizeof(info)) {
- printf("read from sigfd returned %zd: %m\n", len);
- return;
- }
-
- sigaction(info.ssi_signo, NULL, &action);
- if ((action.sa_flags & SA_SIGINFO) && action.sa_sigaction) {
- action.sa_sigaction(info.ssi_signo,
- (siginfo_t *)&info, NULL);
- } else if (action.sa_handler) {
- action.sa_handler(info.ssi_signo);
- }
- }
-}
-
static void cpu_signal(int sig)
{
if (cpu_single_env) {
@@ -532,24 +561,6 @@ static sigset_t block_io_signals(void)
return set;
}
-static int qemu_signalfd_init(sigset_t mask)
-{
- int sigfd;
-
- sigfd = qemu_signalfd(&mask);
- if (sigfd == -1) {
- fprintf(stderr, "failed to create signalfd\n");
- return -errno;
- }
-
- fcntl_setfl(sigfd, O_NONBLOCK);
-
- qemu_set_fd_handler2(sigfd, NULL, sigfd_handler, NULL,
- (void *)(unsigned long) sigfd);
-
- return 0;
-}
-
int qemu_init_main_loop(void)
{
int ret;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 16/37] kvm: Fix race between timer signals and vcpu entry under !IOTHREAD
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Stefan Hajnoczi, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Found by Stefan Hajnoczi: There is a race in kvm_cpu_exec between
checking for exit_request on vcpu entry and timer signals arriving
before KVM starts to catch them. Plug it by blocking both timer related
signals also on !CONFIG_IOTHREAD and process those via signalfd.
As this fix depends on real signalfd support (otherwise the timer
signals only kick the compat helper thread, and the main thread hangs),
we need to detect the invalid constellation and abort configure.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
configure | 6 ++++++
cpus.c | 31 ++++++++++++++++++++++++++++++-
2 files changed, 36 insertions(+), 1 deletions(-)
diff --git a/configure b/configure
index 598e8e1..a3f5345 100755
--- a/configure
+++ b/configure
@@ -2057,6 +2057,12 @@ EOF
if compile_prog "" "" ; then
signalfd=yes
+elif test "$kvm" = "yes" -a "$io_thread" != "yes"; then
+ echo
+ echo "ERROR: Host kernel lacks signalfd() support,"
+ echo "but KVM depends on it when the IO thread is disabled."
+ echo
+ exit 1
fi
# check if eventfd is supported
diff --git a/cpus.c b/cpus.c
index 84792f0..38dd506 100644
--- a/cpus.c
+++ b/cpus.c
@@ -319,6 +319,12 @@ static void qemu_kvm_eat_signals(CPUState *env)
exit(1);
}
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+
+#ifndef CONFIG_IOTHREAD
+ if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) {
+ qemu_notify_event();
+ }
+#endif
}
#else /* _WIN32 */
@@ -368,11 +374,15 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
sigemptyset(&set);
sigaddset(&set, SIG_IPI);
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
pthread_sigmask(SIG_BLOCK, &set, NULL);
pthread_sigmask(SIG_BLOCK, NULL, &set);
sigdelset(&set, SIG_IPI);
sigdelset(&set, SIGBUS);
+ sigdelset(&set, SIGIO);
+ sigdelset(&set, SIGALRM);
r = kvm_set_signal_mask(env, &set);
if (r) {
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
@@ -381,13 +391,32 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
#endif
}
+#ifndef _WIN32
+static sigset_t block_synchronous_signals(void)
+{
+ sigset_t set;
+
+ sigemptyset(&set);
+ if (kvm_enabled()) {
+ /*
+ * We need to process timer signals synchronously to avoid a race
+ * between exit_request check and KVM vcpu entry.
+ */
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
+ }
+
+ return set;
+}
+#endif
+
int qemu_init_main_loop(void)
{
#ifndef _WIN32
sigset_t blocked_signals;
int ret;
- sigemptyset(&blocked_signals);
+ blocked_signals = block_synchronous_signals();
ret = qemu_signalfd_init(blocked_signals);
if (ret) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 16/37] kvm: Fix race between timer signals and vcpu entry under !IOTHREAD
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm, Stefan Hajnoczi
From: Jan Kiszka <jan.kiszka@siemens.com>
Found by Stefan Hajnoczi: There is a race in kvm_cpu_exec between
checking for exit_request on vcpu entry and timer signals arriving
before KVM starts to catch them. Plug it by blocking both timer related
signals also on !CONFIG_IOTHREAD and process those via signalfd.
As this fix depends on real signalfd support (otherwise the timer
signals only kick the compat helper thread, and the main thread hangs),
we need to detect the invalid constellation and abort configure.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
configure | 6 ++++++
cpus.c | 31 ++++++++++++++++++++++++++++++-
2 files changed, 36 insertions(+), 1 deletions(-)
diff --git a/configure b/configure
index 598e8e1..a3f5345 100755
--- a/configure
+++ b/configure
@@ -2057,6 +2057,12 @@ EOF
if compile_prog "" "" ; then
signalfd=yes
+elif test "$kvm" = "yes" -a "$io_thread" != "yes"; then
+ echo
+ echo "ERROR: Host kernel lacks signalfd() support,"
+ echo "but KVM depends on it when the IO thread is disabled."
+ echo
+ exit 1
fi
# check if eventfd is supported
diff --git a/cpus.c b/cpus.c
index 84792f0..38dd506 100644
--- a/cpus.c
+++ b/cpus.c
@@ -319,6 +319,12 @@ static void qemu_kvm_eat_signals(CPUState *env)
exit(1);
}
} while (sigismember(&chkset, SIG_IPI) || sigismember(&chkset, SIGBUS));
+
+#ifndef CONFIG_IOTHREAD
+ if (sigismember(&chkset, SIGIO) || sigismember(&chkset, SIGALRM)) {
+ qemu_notify_event();
+ }
+#endif
}
#else /* _WIN32 */
@@ -368,11 +374,15 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
sigemptyset(&set);
sigaddset(&set, SIG_IPI);
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
pthread_sigmask(SIG_BLOCK, &set, NULL);
pthread_sigmask(SIG_BLOCK, NULL, &set);
sigdelset(&set, SIG_IPI);
sigdelset(&set, SIGBUS);
+ sigdelset(&set, SIGIO);
+ sigdelset(&set, SIGALRM);
r = kvm_set_signal_mask(env, &set);
if (r) {
fprintf(stderr, "kvm_set_signal_mask: %s\n", strerror(-r));
@@ -381,13 +391,32 @@ static void qemu_kvm_init_cpu_signals(CPUState *env)
#endif
}
+#ifndef _WIN32
+static sigset_t block_synchronous_signals(void)
+{
+ sigset_t set;
+
+ sigemptyset(&set);
+ if (kvm_enabled()) {
+ /*
+ * We need to process timer signals synchronously to avoid a race
+ * between exit_request check and KVM vcpu entry.
+ */
+ sigaddset(&set, SIGIO);
+ sigaddset(&set, SIGALRM);
+ }
+
+ return set;
+}
+#endif
+
int qemu_init_main_loop(void)
{
#ifndef _WIN32
sigset_t blocked_signals;
int ret;
- sigemptyset(&blocked_signals);
+ blocked_signals = block_synchronous_signals();
ret = qemu_signalfd_init(blocked_signals);
if (ret) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 17/37] kvm: Add MCE signal support for !CONFIG_IOTHREAD
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Huang Ying, Hidetoshi Seto,
Jin Dongming, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Currently, we only configure and process MCE-related SIGBUS events if
CONFIG_IOTHREAD is enabled. The groundwork is laid, we just need to
factor out the required handler registration and system configuration.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Huang Ying <ying.huang@intel.com>
CC: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CC: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 107 +++++++++++++++++++++++++++++++++++++++-------------------------
1 files changed, 65 insertions(+), 42 deletions(-)
diff --git a/cpus.c b/cpus.c
index 38dd506..9a3fc31 100644
--- a/cpus.c
+++ b/cpus.c
@@ -34,9 +34,6 @@
#include "cpus.h"
#include "compatfd.h"
-#ifdef CONFIG_LINUX
-#include <sys/prctl.h>
-#endif
#ifdef SIGRTMIN
#define SIG_IPI (SIGRTMIN+4)
@@ -44,10 +41,24 @@
#define SIG_IPI SIGUSR1
#endif
+#ifdef CONFIG_LINUX
+
+#include <sys/prctl.h>
+
#ifndef PR_MCE_KILL
#define PR_MCE_KILL 33
#endif
+#ifndef PR_MCE_KILL_SET
+#define PR_MCE_KILL_SET 1
+#endif
+
+#ifndef PR_MCE_KILL_EARLY
+#define PR_MCE_KILL_EARLY 1
+#endif
+
+#endif /* CONFIG_LINUX */
+
static CPUState *next_cpu;
/***********************************************************/
@@ -158,6 +169,52 @@ static void cpu_debug_handler(CPUState *env)
vm_stop(EXCP_DEBUG);
}
+#ifdef CONFIG_LINUX
+static void sigbus_reraise(void)
+{
+ sigset_t set;
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_handler = SIG_DFL;
+ if (!sigaction(SIGBUS, &action, NULL)) {
+ raise(SIGBUS);
+ sigemptyset(&set);
+ sigaddset(&set, SIGBUS);
+ sigprocmask(SIG_UNBLOCK, &set, NULL);
+ }
+ perror("Failed to re-raise SIGBUS!\n");
+ abort();
+}
+
+static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
+ void *ctx)
+{
+ if (kvm_on_sigbus(siginfo->ssi_code,
+ (void *)(intptr_t)siginfo->ssi_addr)) {
+ sigbus_reraise();
+ }
+}
+
+static void qemu_init_sigbus(void)
+{
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_flags = SA_SIGINFO;
+ action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
+ sigaction(SIGBUS, &action, NULL);
+
+ prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0);
+}
+
+#else /* !CONFIG_LINUX */
+
+static void qemu_init_sigbus(void)
+{
+}
+#endif /* !CONFIG_LINUX */
+
#ifndef _WIN32
static int io_thread_fd = -1;
@@ -280,8 +337,6 @@ static int qemu_signalfd_init(sigset_t mask)
return 0;
}
-static void sigbus_reraise(void);
-
static void qemu_kvm_eat_signals(CPUState *env)
{
struct timespec ts = { 0, 0 };
@@ -302,13 +357,11 @@ static void qemu_kvm_eat_signals(CPUState *env)
}
switch (r) {
-#ifdef CONFIG_IOTHREAD
case SIGBUS:
if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
sigbus_reraise();
}
break;
-#endif
default:
break;
}
@@ -397,6 +450,7 @@ static sigset_t block_synchronous_signals(void)
sigset_t set;
sigemptyset(&set);
+ sigaddset(&set, SIGBUS);
if (kvm_enabled()) {
/*
* We need to process timer signals synchronously to avoid a race
@@ -425,6 +479,8 @@ int qemu_init_main_loop(void)
#endif
cpu_set_debug_excp_handler(cpu_debug_handler);
+ qemu_init_sigbus();
+
return qemu_event_init();
}
@@ -561,13 +617,9 @@ static void qemu_tcg_init_cpu_signals(void)
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
}
-static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
- void *ctx);
-
static sigset_t block_io_signals(void)
{
sigset_t set;
- struct sigaction action;
/* SIGUSR2 used by posix-aio-compat.c */
sigemptyset(&set);
@@ -581,12 +633,6 @@ static sigset_t block_io_signals(void)
sigaddset(&set, SIGBUS);
pthread_sigmask(SIG_BLOCK, &set, NULL);
- memset(&action, 0, sizeof(action));
- action.sa_flags = SA_SIGINFO;
- action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
- sigaction(SIGBUS, &action, NULL);
- prctl(PR_MCE_KILL, 1, 1, 0, 0);
-
return set;
}
@@ -597,6 +643,8 @@ int qemu_init_main_loop(void)
cpu_set_debug_excp_handler(cpu_debug_handler);
+ qemu_init_sigbus();
+
blocked_signals = block_io_signals();
ret = qemu_signalfd_init(blocked_signals);
@@ -704,31 +752,6 @@ static void qemu_tcg_wait_io_event(void)
}
}
-static void sigbus_reraise(void)
-{
- sigset_t set;
- struct sigaction action;
-
- memset(&action, 0, sizeof(action));
- action.sa_handler = SIG_DFL;
- if (!sigaction(SIGBUS, &action, NULL)) {
- raise(SIGBUS);
- sigemptyset(&set);
- sigaddset(&set, SIGBUS);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
- }
- perror("Failed to re-raise SIGBUS!\n");
- abort();
-}
-
-static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
- void *ctx)
-{
- if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr)) {
- sigbus_reraise();
- }
-}
-
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (!cpu_has_work(env))
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 17/37] kvm: Add MCE signal support for !CONFIG_IOTHREAD
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: Hidetoshi Seto, kvm, Jan Kiszka, Marcelo Tosatti, qemu-devel,
Huang Ying, Jin Dongming
From: Jan Kiszka <jan.kiszka@siemens.com>
Currently, we only configure and process MCE-related SIGBUS events if
CONFIG_IOTHREAD is enabled. The groundwork is laid, we just need to
factor out the required handler registration and system configuration.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Huang Ying <ying.huang@intel.com>
CC: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
CC: Jin Dongming <jin.dongming@np.css.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 107 +++++++++++++++++++++++++++++++++++++++-------------------------
1 files changed, 65 insertions(+), 42 deletions(-)
diff --git a/cpus.c b/cpus.c
index 38dd506..9a3fc31 100644
--- a/cpus.c
+++ b/cpus.c
@@ -34,9 +34,6 @@
#include "cpus.h"
#include "compatfd.h"
-#ifdef CONFIG_LINUX
-#include <sys/prctl.h>
-#endif
#ifdef SIGRTMIN
#define SIG_IPI (SIGRTMIN+4)
@@ -44,10 +41,24 @@
#define SIG_IPI SIGUSR1
#endif
+#ifdef CONFIG_LINUX
+
+#include <sys/prctl.h>
+
#ifndef PR_MCE_KILL
#define PR_MCE_KILL 33
#endif
+#ifndef PR_MCE_KILL_SET
+#define PR_MCE_KILL_SET 1
+#endif
+
+#ifndef PR_MCE_KILL_EARLY
+#define PR_MCE_KILL_EARLY 1
+#endif
+
+#endif /* CONFIG_LINUX */
+
static CPUState *next_cpu;
/***********************************************************/
@@ -158,6 +169,52 @@ static void cpu_debug_handler(CPUState *env)
vm_stop(EXCP_DEBUG);
}
+#ifdef CONFIG_LINUX
+static void sigbus_reraise(void)
+{
+ sigset_t set;
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_handler = SIG_DFL;
+ if (!sigaction(SIGBUS, &action, NULL)) {
+ raise(SIGBUS);
+ sigemptyset(&set);
+ sigaddset(&set, SIGBUS);
+ sigprocmask(SIG_UNBLOCK, &set, NULL);
+ }
+ perror("Failed to re-raise SIGBUS!\n");
+ abort();
+}
+
+static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
+ void *ctx)
+{
+ if (kvm_on_sigbus(siginfo->ssi_code,
+ (void *)(intptr_t)siginfo->ssi_addr)) {
+ sigbus_reraise();
+ }
+}
+
+static void qemu_init_sigbus(void)
+{
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_flags = SA_SIGINFO;
+ action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
+ sigaction(SIGBUS, &action, NULL);
+
+ prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY, 0, 0);
+}
+
+#else /* !CONFIG_LINUX */
+
+static void qemu_init_sigbus(void)
+{
+}
+#endif /* !CONFIG_LINUX */
+
#ifndef _WIN32
static int io_thread_fd = -1;
@@ -280,8 +337,6 @@ static int qemu_signalfd_init(sigset_t mask)
return 0;
}
-static void sigbus_reraise(void);
-
static void qemu_kvm_eat_signals(CPUState *env)
{
struct timespec ts = { 0, 0 };
@@ -302,13 +357,11 @@ static void qemu_kvm_eat_signals(CPUState *env)
}
switch (r) {
-#ifdef CONFIG_IOTHREAD
case SIGBUS:
if (kvm_on_sigbus_vcpu(env, siginfo.si_code, siginfo.si_addr)) {
sigbus_reraise();
}
break;
-#endif
default:
break;
}
@@ -397,6 +450,7 @@ static sigset_t block_synchronous_signals(void)
sigset_t set;
sigemptyset(&set);
+ sigaddset(&set, SIGBUS);
if (kvm_enabled()) {
/*
* We need to process timer signals synchronously to avoid a race
@@ -425,6 +479,8 @@ int qemu_init_main_loop(void)
#endif
cpu_set_debug_excp_handler(cpu_debug_handler);
+ qemu_init_sigbus();
+
return qemu_event_init();
}
@@ -561,13 +617,9 @@ static void qemu_tcg_init_cpu_signals(void)
pthread_sigmask(SIG_UNBLOCK, &set, NULL);
}
-static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
- void *ctx);
-
static sigset_t block_io_signals(void)
{
sigset_t set;
- struct sigaction action;
/* SIGUSR2 used by posix-aio-compat.c */
sigemptyset(&set);
@@ -581,12 +633,6 @@ static sigset_t block_io_signals(void)
sigaddset(&set, SIGBUS);
pthread_sigmask(SIG_BLOCK, &set, NULL);
- memset(&action, 0, sizeof(action));
- action.sa_flags = SA_SIGINFO;
- action.sa_sigaction = (void (*)(int, siginfo_t*, void*))sigbus_handler;
- sigaction(SIGBUS, &action, NULL);
- prctl(PR_MCE_KILL, 1, 1, 0, 0);
-
return set;
}
@@ -597,6 +643,8 @@ int qemu_init_main_loop(void)
cpu_set_debug_excp_handler(cpu_debug_handler);
+ qemu_init_sigbus();
+
blocked_signals = block_io_signals();
ret = qemu_signalfd_init(blocked_signals);
@@ -704,31 +752,6 @@ static void qemu_tcg_wait_io_event(void)
}
}
-static void sigbus_reraise(void)
-{
- sigset_t set;
- struct sigaction action;
-
- memset(&action, 0, sizeof(action));
- action.sa_handler = SIG_DFL;
- if (!sigaction(SIGBUS, &action, NULL)) {
- raise(SIGBUS);
- sigemptyset(&set);
- sigaddset(&set, SIGBUS);
- sigprocmask(SIG_UNBLOCK, &set, NULL);
- }
- perror("Failed to re-raise SIGBUS!\n");
- abort();
-}
-
-static void sigbus_handler(int n, struct qemu_signalfd_siginfo *siginfo,
- void *ctx)
-{
- if (kvm_on_sigbus(siginfo->ssi_code, (void *)(intptr_t)siginfo->ssi_addr)) {
- sigbus_reraise();
- }
-}
-
static void qemu_kvm_wait_io_event(CPUState *env)
{
while (!cpu_has_work(env))
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 18/37] Introduce VCPU self-signaling service
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Introduce qemu_cpu_kick_self to send SIG_IPI to the calling VCPU
context. First user will be kvm.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 21 +++++++++++++++++++++
qemu-common.h | 1 +
2 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index 9a3fc31..6a85dc8 100644
--- a/cpus.c
+++ b/cpus.c
@@ -529,6 +529,17 @@ void qemu_cpu_kick(void *env)
return;
}
+void qemu_cpu_kick_self(void)
+{
+#ifndef _WIN32
+ assert(cpu_single_env);
+
+ raise(SIG_IPI);
+#else
+ abort();
+#endif
+}
+
void qemu_notify_event(void)
{
CPUState *env = cpu_single_env;
@@ -831,6 +842,16 @@ void qemu_cpu_kick(void *_env)
}
}
+void qemu_cpu_kick_self(void)
+{
+ assert(cpu_single_env);
+
+ if (!cpu_single_env->thread_kicked) {
+ qemu_thread_signal(cpu_single_env->thread, SIG_IPI);
+ cpu_single_env->thread_kicked = true;
+ }
+}
+
int qemu_cpu_self(void *_env)
{
CPUState *env = _env;
diff --git a/qemu-common.h b/qemu-common.h
index c7ff280..a4d9c21 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -288,6 +288,7 @@ void qemu_notify_event(void);
/* Unblock cpu */
void qemu_cpu_kick(void *env);
+void qemu_cpu_kick_self(void);
int qemu_cpu_self(void *env);
/* work queue */
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 18/37] Introduce VCPU self-signaling service
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Introduce qemu_cpu_kick_self to send SIG_IPI to the calling VCPU
context. First user will be kvm.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 21 +++++++++++++++++++++
qemu-common.h | 1 +
2 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/cpus.c b/cpus.c
index 9a3fc31..6a85dc8 100644
--- a/cpus.c
+++ b/cpus.c
@@ -529,6 +529,17 @@ void qemu_cpu_kick(void *env)
return;
}
+void qemu_cpu_kick_self(void)
+{
+#ifndef _WIN32
+ assert(cpu_single_env);
+
+ raise(SIG_IPI);
+#else
+ abort();
+#endif
+}
+
void qemu_notify_event(void)
{
CPUState *env = cpu_single_env;
@@ -831,6 +842,16 @@ void qemu_cpu_kick(void *_env)
}
}
+void qemu_cpu_kick_self(void)
+{
+ assert(cpu_single_env);
+
+ if (!cpu_single_env->thread_kicked) {
+ qemu_thread_signal(cpu_single_env->thread, SIG_IPI);
+ cpu_single_env->thread_kicked = true;
+ }
+}
+
int qemu_cpu_self(void *_env)
{
CPUState *env = _env;
diff --git a/qemu-common.h b/qemu-common.h
index c7ff280..a4d9c21 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -288,6 +288,7 @@ void qemu_notify_event(void);
/* Unblock cpu */
void qemu_cpu_kick(void *env);
+void qemu_cpu_kick_self(void);
int qemu_cpu_self(void *env);
/* work queue */
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 19/37] kvm: Unconditionally reenter kernel after IO exits
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Gleb Natapov, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
KVM requires to reenter the kernel after IO exits in order to complete
instruction emulation. Failing to do so will leave the kernel state
inconsistently behind. To ensure that we will get back ASAP, we issue a
self-signal that will cause KVM_RUN to return once the pending
operations are completed.
We can move kvm_arch_process_irqchip_events out of the inner VCPU loop.
The only state that mattered at its old place was a pending INIT
request. Catch it in kvm_arch_pre_run and also trigger a self-signal to
process the request on next kvm_cpu_exec.
This patch also fixes the missing exit_request check in kvm_cpu_exec in
the CONFIG_IOTHREAD case.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 31 +++++++++++++++++--------------
target-i386/kvm.c | 5 +++++
2 files changed, 22 insertions(+), 14 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index a83aff2..0c20f9e 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -199,7 +199,6 @@ int kvm_pit_in_kernel(void)
return kvm_state->pit_in_kernel;
}
-
int kvm_init_vcpu(CPUState *env)
{
KVMState *s = kvm_state;
@@ -896,29 +895,33 @@ int kvm_cpu_exec(CPUState *env)
DPRINTF("kvm_cpu_exec()\n");
- do {
-#ifndef CONFIG_IOTHREAD
- if (env->exit_request) {
- DPRINTF("interrupt exit requested\n");
- ret = 0;
- break;
- }
-#endif
-
- if (kvm_arch_process_irqchip_events(env)) {
- ret = 0;
- break;
- }
+ if (kvm_arch_process_irqchip_events(env)) {
+ env->exit_request = 0;
+ env->exception_index = EXCP_HLT;
+ return 0;
+ }
+ do {
if (env->kvm_vcpu_dirty) {
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
env->kvm_vcpu_dirty = 0;
}
kvm_arch_pre_run(env, run);
+ if (env->exit_request) {
+ DPRINTF("interrupt exit requested\n");
+ /*
+ * KVM requires us to reenter the kernel after IO exits to complete
+ * instruction emulation. This self-signal will ensure that we
+ * leave ASAP again.
+ */
+ qemu_cpu_kick_self();
+ }
cpu_single_env = NULL;
qemu_mutex_unlock_iothread();
+
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
+
qemu_mutex_lock_iothread();
cpu_single_env = env;
kvm_arch_post_run(env, run);
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 9df8ff8..8a87244 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1426,6 +1426,11 @@ int kvm_arch_get_registers(CPUState *env)
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
+ /* Force the VCPU out of its inner loop to process the INIT request */
+ if (env->interrupt_request & CPU_INTERRUPT_INIT) {
+ env->exit_request = 1;
+ }
+
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 19/37] kvm: Unconditionally reenter kernel after IO exits
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: Jan Kiszka, Gleb Natapov, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
KVM requires to reenter the kernel after IO exits in order to complete
instruction emulation. Failing to do so will leave the kernel state
inconsistently behind. To ensure that we will get back ASAP, we issue a
self-signal that will cause KVM_RUN to return once the pending
operations are completed.
We can move kvm_arch_process_irqchip_events out of the inner VCPU loop.
The only state that mattered at its old place was a pending INIT
request. Catch it in kvm_arch_pre_run and also trigger a self-signal to
process the request on next kvm_cpu_exec.
This patch also fixes the missing exit_request check in kvm_cpu_exec in
the CONFIG_IOTHREAD case.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 31 +++++++++++++++++--------------
target-i386/kvm.c | 5 +++++
2 files changed, 22 insertions(+), 14 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index a83aff2..0c20f9e 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -199,7 +199,6 @@ int kvm_pit_in_kernel(void)
return kvm_state->pit_in_kernel;
}
-
int kvm_init_vcpu(CPUState *env)
{
KVMState *s = kvm_state;
@@ -896,29 +895,33 @@ int kvm_cpu_exec(CPUState *env)
DPRINTF("kvm_cpu_exec()\n");
- do {
-#ifndef CONFIG_IOTHREAD
- if (env->exit_request) {
- DPRINTF("interrupt exit requested\n");
- ret = 0;
- break;
- }
-#endif
-
- if (kvm_arch_process_irqchip_events(env)) {
- ret = 0;
- break;
- }
+ if (kvm_arch_process_irqchip_events(env)) {
+ env->exit_request = 0;
+ env->exception_index = EXCP_HLT;
+ return 0;
+ }
+ do {
if (env->kvm_vcpu_dirty) {
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
env->kvm_vcpu_dirty = 0;
}
kvm_arch_pre_run(env, run);
+ if (env->exit_request) {
+ DPRINTF("interrupt exit requested\n");
+ /*
+ * KVM requires us to reenter the kernel after IO exits to complete
+ * instruction emulation. This self-signal will ensure that we
+ * leave ASAP again.
+ */
+ qemu_cpu_kick_self();
+ }
cpu_single_env = NULL;
qemu_mutex_unlock_iothread();
+
ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
+
qemu_mutex_lock_iothread();
cpu_single_env = env;
kvm_arch_post_run(env, run);
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 9df8ff8..8a87244 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1426,6 +1426,11 @@ int kvm_arch_get_registers(CPUState *env)
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
+ /* Force the VCPU out of its inner loop to process the INIT request */
+ if (env->interrupt_request & CPU_INTERRUPT_INIT) {
+ env->exit_request = 1;
+ }
+
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 20/37] kvm: Remove static return code of kvm_handle_io
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Improve the readability of the exit dispatcher by moving the static
return value of kvm_handle_io to its caller.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 17 ++++++++---------
1 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 0c20f9e..4729ec5 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -774,8 +774,8 @@ err:
return ret;
}
-static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
- uint32_t count)
+static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
+ uint32_t count)
{
int i;
uint8_t *ptr = data;
@@ -809,8 +809,6 @@ static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
ptr += size;
}
-
- return 1;
}
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
@@ -944,11 +942,12 @@ int kvm_cpu_exec(CPUState *env)
switch (run->exit_reason) {
case KVM_EXIT_IO:
DPRINTF("handle_io\n");
- ret = kvm_handle_io(run->io.port,
- (uint8_t *)run + run->io.data_offset,
- run->io.direction,
- run->io.size,
- run->io.count);
+ kvm_handle_io(run->io.port,
+ (uint8_t *)run + run->io.data_offset,
+ run->io.direction,
+ run->io.size,
+ run->io.count);
+ ret = 1;
break;
case KVM_EXIT_MMIO:
DPRINTF("handle_mmio\n");
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 20/37] kvm: Remove static return code of kvm_handle_io
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Improve the readability of the exit dispatcher by moving the static
return value of kvm_handle_io to its caller.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 17 ++++++++---------
1 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 0c20f9e..4729ec5 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -774,8 +774,8 @@ err:
return ret;
}
-static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
- uint32_t count)
+static void kvm_handle_io(uint16_t port, void *data, int direction, int size,
+ uint32_t count)
{
int i;
uint8_t *ptr = data;
@@ -809,8 +809,6 @@ static int kvm_handle_io(uint16_t port, void *data, int direction, int size,
ptr += size;
}
-
- return 1;
}
#ifdef KVM_CAP_INTERNAL_ERROR_DATA
@@ -944,11 +942,12 @@ int kvm_cpu_exec(CPUState *env)
switch (run->exit_reason) {
case KVM_EXIT_IO:
DPRINTF("handle_io\n");
- ret = kvm_handle_io(run->io.port,
- (uint8_t *)run + run->io.data_offset,
- run->io.direction,
- run->io.size,
- run->io.count);
+ kvm_handle_io(run->io.port,
+ (uint8_t *)run + run->io.data_offset,
+ run->io.direction,
+ run->io.size,
+ run->io.count);
+ ret = 1;
break;
case KVM_EXIT_MMIO:
DPRINTF("handle_mmio\n");
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 21/37] kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWN
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
The reset we issue on KVM_EXIT_SHUTDOWN implies that we should also
leave the VCPU loop. As we now check for exit_request which is set by
qemu_system_reset_request, this bug is no longer critical. Still it's an
unneeded extra turn.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 4729ec5..42dfed8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -963,7 +963,6 @@ int kvm_cpu_exec(CPUState *env)
case KVM_EXIT_SHUTDOWN:
DPRINTF("shutdown\n");
qemu_system_reset_request();
- ret = 1;
break;
case KVM_EXIT_UNKNOWN:
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 21/37] kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWN
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
The reset we issue on KVM_EXIT_SHUTDOWN implies that we should also
leave the VCPU loop. As we now check for exit_request which is set by
qemu_system_reset_request, this bug is no longer critical. Still it's an
unneeded extra turn.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 4729ec5..42dfed8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -963,7 +963,6 @@ int kvm_cpu_exec(CPUState *env)
case KVM_EXIT_SHUTDOWN:
DPRINTF("shutdown\n");
qemu_system_reset_request();
- ret = 1;
break;
case KVM_EXIT_UNKNOWN:
fprintf(stderr, "KVM: unknown exit, hardware reason %" PRIx64 "\n",
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 22/37] kvm: make tsc stable over migration and machine start
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Glauber Costa, Jan Kiszka, Marcelo Tosatti
From: Glauber Costa <glommer@redhat.com>
If the machine is stopped, we should not record two different tsc values
upon a save operation. The same problem happens with kvmclock.
But kvmclock is taking a different diretion, being now seen as a separate
device. Since this is unlikely to happen with the tsc, I am taking the
approach here of simply registering a handler for state change, and
using a per-CPUState variable that prevents double updates for the TSC.
Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/cpu.h | 1 +
target-i386/kvm.c | 18 +++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index af701a4..5f1df8b 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -734,6 +734,7 @@ typedef struct CPUX86State {
uint32_t sipi_vector;
uint32_t cpuid_kvm_features;
uint32_t cpuid_svm_features;
+ bool tsc_valid;
/* in order to simplify APIC support, we leave this pointer to the
user */
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8a87244..ba183c4 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -301,6 +301,15 @@ void kvm_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
#endif
}
+static void cpu_update_state(void *opaque, int running, int reason)
+{
+ CPUState *env = opaque;
+
+ if (running) {
+ env->tsc_valid = false;
+ }
+}
+
int kvm_arch_init_vcpu(CPUState *env)
{
struct {
@@ -434,6 +443,8 @@ int kvm_arch_init_vcpu(CPUState *env)
}
#endif
+ qemu_add_vm_change_state_handler(cpu_update_state, env);
+
return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data);
}
@@ -1061,7 +1072,12 @@ static int kvm_get_msrs(CPUState *env)
if (has_msr_hsave_pa) {
msrs[n++].index = MSR_VM_HSAVE_PA;
}
- msrs[n++].index = MSR_IA32_TSC;
+
+ if (!env->tsc_valid) {
+ msrs[n++].index = MSR_IA32_TSC;
+ env->tsc_valid = !vm_running;
+ }
+
#ifdef TARGET_X86_64
if (lm_capable_kernel) {
msrs[n++].index = MSR_CSTAR;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 22/37] kvm: make tsc stable over migration and machine start
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori
Cc: Glauber Costa, Marcelo Tosatti, Jan Kiszka, qemu-devel, kvm
From: Glauber Costa <glommer@redhat.com>
If the machine is stopped, we should not record two different tsc values
upon a save operation. The same problem happens with kvmclock.
But kvmclock is taking a different diretion, being now seen as a separate
device. Since this is unlikely to happen with the tsc, I am taking the
approach here of simply registering a handler for state change, and
using a per-CPUState variable that prevents double updates for the TSC.
Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/cpu.h | 1 +
target-i386/kvm.c | 18 +++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index af701a4..5f1df8b 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -734,6 +734,7 @@ typedef struct CPUX86State {
uint32_t sipi_vector;
uint32_t cpuid_kvm_features;
uint32_t cpuid_svm_features;
+ bool tsc_valid;
/* in order to simplify APIC support, we leave this pointer to the
user */
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8a87244..ba183c4 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -301,6 +301,15 @@ void kvm_inject_x86_mce(CPUState *cenv, int bank, uint64_t status,
#endif
}
+static void cpu_update_state(void *opaque, int running, int reason)
+{
+ CPUState *env = opaque;
+
+ if (running) {
+ env->tsc_valid = false;
+ }
+}
+
int kvm_arch_init_vcpu(CPUState *env)
{
struct {
@@ -434,6 +443,8 @@ int kvm_arch_init_vcpu(CPUState *env)
}
#endif
+ qemu_add_vm_change_state_handler(cpu_update_state, env);
+
return kvm_vcpu_ioctl(env, KVM_SET_CPUID2, &cpuid_data);
}
@@ -1061,7 +1072,12 @@ static int kvm_get_msrs(CPUState *env)
if (has_msr_hsave_pa) {
msrs[n++].index = MSR_VM_HSAVE_PA;
}
- msrs[n++].index = MSR_IA32_TSC;
+
+ if (!env->tsc_valid) {
+ msrs[n++].index = MSR_IA32_TSC;
+ env->tsc_valid = !vm_running;
+ }
+
#ifdef TARGET_X86_64
if (lm_capable_kernel) {
msrs[n++].index = MSR_CSTAR;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 23/37] Refactor kvm&tcg function names in cpus.c
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Pure interface cosmetics: Ensure that only kvm core services (as
declared in kvm.h) start with "kvm_". Prepend "qemu_" to those that
violate this rule in cpus.c. Also rename the corresponding tcg functions
for the sake of consistency.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/cpus.c b/cpus.c
index 6a85dc8..d54ec7d 100644
--- a/cpus.c
+++ b/cpus.c
@@ -774,7 +774,7 @@ static void qemu_kvm_wait_io_event(CPUState *env)
static int qemu_cpu_exec(CPUState *env);
-static void *kvm_cpu_thread_fn(void *arg)
+static void *qemu_kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
int r;
@@ -807,7 +807,7 @@ static void *kvm_cpu_thread_fn(void *arg)
return NULL;
}
-static void *tcg_cpu_thread_fn(void *arg)
+static void *qemu_tcg_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
@@ -926,7 +926,7 @@ void resume_all_vcpus(void)
}
}
-static void tcg_init_vcpu(void *_env)
+static void qemu_tcg_init_vcpu(void *_env)
{
CPUState *env = _env;
/* share a single thread for all cpus with TCG */
@@ -934,7 +934,7 @@ static void tcg_init_vcpu(void *_env)
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
- qemu_thread_create(env->thread, tcg_cpu_thread_fn, env);
+ qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
tcg_cpu_thread = env->thread;
@@ -945,12 +945,12 @@ static void tcg_init_vcpu(void *_env)
}
}
-static void kvm_start_vcpu(CPUState *env)
+static void qemu_kvm_start_vcpu(CPUState *env)
{
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
- qemu_thread_create(env->thread, kvm_cpu_thread_fn, env);
+ qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
}
@@ -962,9 +962,9 @@ void qemu_init_vcpu(void *_env)
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
if (kvm_enabled())
- kvm_start_vcpu(env);
+ qemu_kvm_start_vcpu(env);
else
- tcg_init_vcpu(env);
+ qemu_tcg_init_vcpu(env);
}
void qemu_notify_event(void)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 23/37] Refactor kvm&tcg function names in cpus.c
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Pure interface cosmetics: Ensure that only kvm core services (as
declared in kvm.h) start with "kvm_". Prepend "qemu_" to those that
violate this rule in cpus.c. Also rename the corresponding tcg functions
for the sake of consistency.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/cpus.c b/cpus.c
index 6a85dc8..d54ec7d 100644
--- a/cpus.c
+++ b/cpus.c
@@ -774,7 +774,7 @@ static void qemu_kvm_wait_io_event(CPUState *env)
static int qemu_cpu_exec(CPUState *env);
-static void *kvm_cpu_thread_fn(void *arg)
+static void *qemu_kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
int r;
@@ -807,7 +807,7 @@ static void *kvm_cpu_thread_fn(void *arg)
return NULL;
}
-static void *tcg_cpu_thread_fn(void *arg)
+static void *qemu_tcg_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
@@ -926,7 +926,7 @@ void resume_all_vcpus(void)
}
}
-static void tcg_init_vcpu(void *_env)
+static void qemu_tcg_init_vcpu(void *_env)
{
CPUState *env = _env;
/* share a single thread for all cpus with TCG */
@@ -934,7 +934,7 @@ static void tcg_init_vcpu(void *_env)
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
- qemu_thread_create(env->thread, tcg_cpu_thread_fn, env);
+ qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
tcg_cpu_thread = env->thread;
@@ -945,12 +945,12 @@ static void tcg_init_vcpu(void *_env)
}
}
-static void kvm_start_vcpu(CPUState *env)
+static void qemu_kvm_start_vcpu(CPUState *env)
{
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
- qemu_thread_create(env->thread, kvm_cpu_thread_fn, env);
+ qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
while (env->created == 0)
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
}
@@ -962,9 +962,9 @@ void qemu_init_vcpu(void *_env)
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
if (kvm_enabled())
- kvm_start_vcpu(env);
+ qemu_kvm_start_vcpu(env);
else
- tcg_init_vcpu(env);
+ qemu_tcg_init_vcpu(env);
}
void qemu_notify_event(void)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 24/37] Refactor cpu_has_work/any_cpu_has_work in cpus.c
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Avoid duplicate use of the function name cpu_has_work, it's confusing,
also their scope. Refactor cpu_has_work to cpu_thread_is_idle and do the
same with any_cpu_has_work.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 43 +++++++++++++++++++++++--------------------
1 files changed, 23 insertions(+), 20 deletions(-)
diff --git a/cpus.c b/cpus.c
index d54ec7d..e963208 100644
--- a/cpus.c
+++ b/cpus.c
@@ -137,29 +137,30 @@ static int cpu_can_run(CPUState *env)
return 1;
}
-static int cpu_has_work(CPUState *env)
+static bool cpu_thread_is_idle(CPUState *env)
{
- if (env->stop)
- return 1;
- if (env->queued_work_first)
- return 1;
- if (env->stopped || !vm_running)
- return 0;
- if (!env->halted)
- return 1;
- if (qemu_cpu_has_work(env))
- return 1;
- return 0;
+ if (env->stop || env->queued_work_first) {
+ return false;
+ }
+ if (env->stopped || !vm_running) {
+ return true;
+ }
+ if (!env->halted || qemu_cpu_has_work(env)) {
+ return false;
+ }
+ return true;
}
-static int any_cpu_has_work(void)
+static bool all_cpu_threads_idle(void)
{
CPUState *env;
- for (env = first_cpu; env != NULL; env = env->next_cpu)
- if (cpu_has_work(env))
- return 1;
- return 0;
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ if (!cpu_thread_is_idle(env)) {
+ return false;
+ }
+ }
+ return true;
}
static void cpu_debug_handler(CPUState *env)
@@ -743,8 +744,9 @@ static void qemu_tcg_wait_io_event(void)
{
CPUState *env;
- while (!any_cpu_has_work())
+ while (all_cpu_threads_idle()) {
qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
+ }
qemu_mutex_unlock(&qemu_global_mutex);
@@ -765,8 +767,9 @@ static void qemu_tcg_wait_io_event(void)
static void qemu_kvm_wait_io_event(CPUState *env)
{
- while (!cpu_has_work(env))
+ while (cpu_thread_is_idle(env)) {
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
+ }
qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(env);
@@ -1070,7 +1073,7 @@ bool cpu_exec_all(void)
}
}
exit_request = 0;
- return any_cpu_has_work();
+ return !all_cpu_threads_idle();
}
void set_numa_modes(void)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 24/37] Refactor cpu_has_work/any_cpu_has_work in cpus.c
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Avoid duplicate use of the function name cpu_has_work, it's confusing,
also their scope. Refactor cpu_has_work to cpu_thread_is_idle and do the
same with any_cpu_has_work.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 43 +++++++++++++++++++++++--------------------
1 files changed, 23 insertions(+), 20 deletions(-)
diff --git a/cpus.c b/cpus.c
index d54ec7d..e963208 100644
--- a/cpus.c
+++ b/cpus.c
@@ -137,29 +137,30 @@ static int cpu_can_run(CPUState *env)
return 1;
}
-static int cpu_has_work(CPUState *env)
+static bool cpu_thread_is_idle(CPUState *env)
{
- if (env->stop)
- return 1;
- if (env->queued_work_first)
- return 1;
- if (env->stopped || !vm_running)
- return 0;
- if (!env->halted)
- return 1;
- if (qemu_cpu_has_work(env))
- return 1;
- return 0;
+ if (env->stop || env->queued_work_first) {
+ return false;
+ }
+ if (env->stopped || !vm_running) {
+ return true;
+ }
+ if (!env->halted || qemu_cpu_has_work(env)) {
+ return false;
+ }
+ return true;
}
-static int any_cpu_has_work(void)
+static bool all_cpu_threads_idle(void)
{
CPUState *env;
- for (env = first_cpu; env != NULL; env = env->next_cpu)
- if (cpu_has_work(env))
- return 1;
- return 0;
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
+ if (!cpu_thread_is_idle(env)) {
+ return false;
+ }
+ }
+ return true;
}
static void cpu_debug_handler(CPUState *env)
@@ -743,8 +744,9 @@ static void qemu_tcg_wait_io_event(void)
{
CPUState *env;
- while (!any_cpu_has_work())
+ while (all_cpu_threads_idle()) {
qemu_cond_timedwait(tcg_halt_cond, &qemu_global_mutex, 1000);
+ }
qemu_mutex_unlock(&qemu_global_mutex);
@@ -765,8 +767,9 @@ static void qemu_tcg_wait_io_event(void)
static void qemu_kvm_wait_io_event(CPUState *env)
{
- while (!cpu_has_work(env))
+ while (cpu_thread_is_idle(env)) {
qemu_cond_timedwait(env->halt_cond, &qemu_global_mutex, 1000);
+ }
qemu_kvm_eat_signals(env);
qemu_wait_io_event_common(env);
@@ -1070,7 +1073,7 @@ bool cpu_exec_all(void)
}
}
exit_request = 0;
- return any_cpu_has_work();
+ return !all_cpu_threads_idle();
}
void set_numa_modes(void)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 25/37] Fix a few coding style violations in cpus.c
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
No functional changes.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 71 +++++++++++++++++++++++++++++++++++++++------------------------
1 files changed, 44 insertions(+), 27 deletions(-)
diff --git a/cpus.c b/cpus.c
index e963208..802d15a 100644
--- a/cpus.c
+++ b/cpus.c
@@ -130,10 +130,12 @@ static void do_vm_stop(int reason)
static int cpu_can_run(CPUState *env)
{
- if (env->stop)
+ if (env->stop) {
return 0;
- if (env->stopped || !vm_running)
+ }
+ if (env->stopped || !vm_running) {
return 0;
+ }
return 1;
}
@@ -225,9 +227,9 @@ static void qemu_event_increment(void)
static const uint64_t val = 1;
ssize_t ret;
- if (io_thread_fd == -1)
+ if (io_thread_fd == -1) {
return;
-
+ }
do {
ret = write(io_thread_fd, &val, sizeof(val));
} while (ret < 0 && errno == EINTR);
@@ -258,17 +260,17 @@ static int qemu_event_init(void)
int fds[2];
err = qemu_eventfd(fds);
- if (err == -1)
+ if (err == -1) {
return -errno;
-
+ }
err = fcntl_setfl(fds[0], O_NONBLOCK);
- if (err < 0)
+ if (err < 0) {
goto fail;
-
+ }
err = fcntl_setfl(fds[1], O_NONBLOCK);
- if (err < 0)
+ if (err < 0) {
goto fail;
-
+ }
qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL,
(void *)(unsigned long)fds[0]);
@@ -527,7 +529,6 @@ void pause_all_vcpus(void)
void qemu_cpu_kick(void *env)
{
- return;
}
void qemu_cpu_kick_self(void)
@@ -660,13 +661,15 @@ int qemu_init_main_loop(void)
blocked_signals = block_io_signals();
ret = qemu_signalfd_init(blocked_signals);
- if (ret)
+ if (ret) {
return ret;
+ }
/* Note eventfd must be drained before signalfd handlers run */
ret = qemu_event_init();
- if (ret)
+ if (ret) {
return ret;
+ }
qemu_cond_init(&qemu_pause_cond);
qemu_cond_init(&qemu_system_cond);
@@ -696,10 +699,11 @@ void run_on_cpu(CPUState *env, void (*func)(void *data), void *data)
wi.func = func;
wi.data = data;
- if (!env->queued_work_first)
+ if (!env->queued_work_first) {
env->queued_work_first = &wi;
- else
+ } else {
env->queued_work_last->next = &wi;
+ }
env->queued_work_last = &wi;
wi.next = NULL;
wi.done = false;
@@ -717,8 +721,9 @@ static void flush_queued_work(CPUState *env)
{
struct qemu_work_item *wi;
- if (!env->queued_work_first)
+ if (!env->queued_work_first) {
return;
+ }
while ((wi = env->queued_work_first)) {
env->queued_work_first = wi->next;
@@ -798,12 +803,14 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
qemu_cond_signal(&qemu_cpu_cond);
/* and wait for machine initialization */
- while (!qemu_system_ready)
+ while (!qemu_system_ready) {
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+ }
while (1) {
- if (cpu_can_run(env))
+ if (cpu_can_run(env)) {
qemu_cpu_exec(env);
+ }
qemu_kvm_wait_io_event(env);
}
@@ -819,13 +826,15 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
/* signal CPU creation */
qemu_mutex_lock(&qemu_global_mutex);
- for (env = first_cpu; env != NULL; env = env->next_cpu)
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
env->created = 1;
+ }
qemu_cond_signal(&qemu_cpu_cond);
/* and wait for machine initialization */
- while (!qemu_system_ready)
+ while (!qemu_system_ready) {
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+ }
while (1) {
cpu_exec_all();
@@ -838,6 +847,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
void qemu_cpu_kick(void *_env)
{
CPUState *env = _env;
+
qemu_cond_broadcast(env->halt_cond);
if (!env->thread_kicked) {
qemu_thread_signal(env->thread, SIG_IPI);
@@ -889,8 +899,9 @@ static int all_vcpus_paused(void)
CPUState *penv = first_cpu;
while (penv) {
- if (!penv->stopped)
+ if (!penv->stopped) {
return 0;
+ }
penv = (CPUState *)penv->next_cpu;
}
@@ -932,14 +943,16 @@ void resume_all_vcpus(void)
static void qemu_tcg_init_vcpu(void *_env)
{
CPUState *env = _env;
+
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env);
- while (env->created == 0)
+ while (env->created == 0) {
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+ }
tcg_cpu_thread = env->thread;
tcg_halt_cond = env->halt_cond;
} else {
@@ -954,8 +967,9 @@ static void qemu_kvm_start_vcpu(CPUState *env)
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
- while (env->created == 0)
+ while (env->created == 0) {
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+ }
}
void qemu_init_vcpu(void *_env)
@@ -964,10 +978,11 @@ void qemu_init_vcpu(void *_env)
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
- if (kvm_enabled())
+ if (kvm_enabled()) {
qemu_kvm_start_vcpu(env);
- else
+ } else {
qemu_tcg_init_vcpu(env);
+ }
}
void qemu_notify_event(void)
@@ -1050,16 +1065,18 @@ bool cpu_exec_all(void)
{
int r;
- if (next_cpu == NULL)
+ if (next_cpu == NULL) {
next_cpu = first_cpu;
+ }
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
CPUState *env = next_cpu;
qemu_clock_enable(vm_clock,
(env->singlestep_enabled & SSTEP_NOTIMER) == 0);
- if (qemu_alarm_pending())
+ if (qemu_alarm_pending()) {
break;
+ }
if (cpu_can_run(env)) {
r = qemu_cpu_exec(env);
if (kvm_enabled()) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 25/37] Fix a few coding style violations in cpus.c
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
No functional changes.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 71 +++++++++++++++++++++++++++++++++++++++------------------------
1 files changed, 44 insertions(+), 27 deletions(-)
diff --git a/cpus.c b/cpus.c
index e963208..802d15a 100644
--- a/cpus.c
+++ b/cpus.c
@@ -130,10 +130,12 @@ static void do_vm_stop(int reason)
static int cpu_can_run(CPUState *env)
{
- if (env->stop)
+ if (env->stop) {
return 0;
- if (env->stopped || !vm_running)
+ }
+ if (env->stopped || !vm_running) {
return 0;
+ }
return 1;
}
@@ -225,9 +227,9 @@ static void qemu_event_increment(void)
static const uint64_t val = 1;
ssize_t ret;
- if (io_thread_fd == -1)
+ if (io_thread_fd == -1) {
return;
-
+ }
do {
ret = write(io_thread_fd, &val, sizeof(val));
} while (ret < 0 && errno == EINTR);
@@ -258,17 +260,17 @@ static int qemu_event_init(void)
int fds[2];
err = qemu_eventfd(fds);
- if (err == -1)
+ if (err == -1) {
return -errno;
-
+ }
err = fcntl_setfl(fds[0], O_NONBLOCK);
- if (err < 0)
+ if (err < 0) {
goto fail;
-
+ }
err = fcntl_setfl(fds[1], O_NONBLOCK);
- if (err < 0)
+ if (err < 0) {
goto fail;
-
+ }
qemu_set_fd_handler2(fds[0], NULL, qemu_event_read, NULL,
(void *)(unsigned long)fds[0]);
@@ -527,7 +529,6 @@ void pause_all_vcpus(void)
void qemu_cpu_kick(void *env)
{
- return;
}
void qemu_cpu_kick_self(void)
@@ -660,13 +661,15 @@ int qemu_init_main_loop(void)
blocked_signals = block_io_signals();
ret = qemu_signalfd_init(blocked_signals);
- if (ret)
+ if (ret) {
return ret;
+ }
/* Note eventfd must be drained before signalfd handlers run */
ret = qemu_event_init();
- if (ret)
+ if (ret) {
return ret;
+ }
qemu_cond_init(&qemu_pause_cond);
qemu_cond_init(&qemu_system_cond);
@@ -696,10 +699,11 @@ void run_on_cpu(CPUState *env, void (*func)(void *data), void *data)
wi.func = func;
wi.data = data;
- if (!env->queued_work_first)
+ if (!env->queued_work_first) {
env->queued_work_first = &wi;
- else
+ } else {
env->queued_work_last->next = &wi;
+ }
env->queued_work_last = &wi;
wi.next = NULL;
wi.done = false;
@@ -717,8 +721,9 @@ static void flush_queued_work(CPUState *env)
{
struct qemu_work_item *wi;
- if (!env->queued_work_first)
+ if (!env->queued_work_first) {
return;
+ }
while ((wi = env->queued_work_first)) {
env->queued_work_first = wi->next;
@@ -798,12 +803,14 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
qemu_cond_signal(&qemu_cpu_cond);
/* and wait for machine initialization */
- while (!qemu_system_ready)
+ while (!qemu_system_ready) {
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+ }
while (1) {
- if (cpu_can_run(env))
+ if (cpu_can_run(env)) {
qemu_cpu_exec(env);
+ }
qemu_kvm_wait_io_event(env);
}
@@ -819,13 +826,15 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
/* signal CPU creation */
qemu_mutex_lock(&qemu_global_mutex);
- for (env = first_cpu; env != NULL; env = env->next_cpu)
+ for (env = first_cpu; env != NULL; env = env->next_cpu) {
env->created = 1;
+ }
qemu_cond_signal(&qemu_cpu_cond);
/* and wait for machine initialization */
- while (!qemu_system_ready)
+ while (!qemu_system_ready) {
qemu_cond_timedwait(&qemu_system_cond, &qemu_global_mutex, 100);
+ }
while (1) {
cpu_exec_all();
@@ -838,6 +847,7 @@ static void *qemu_tcg_cpu_thread_fn(void *arg)
void qemu_cpu_kick(void *_env)
{
CPUState *env = _env;
+
qemu_cond_broadcast(env->halt_cond);
if (!env->thread_kicked) {
qemu_thread_signal(env->thread, SIG_IPI);
@@ -889,8 +899,9 @@ static int all_vcpus_paused(void)
CPUState *penv = first_cpu;
while (penv) {
- if (!penv->stopped)
+ if (!penv->stopped) {
return 0;
+ }
penv = (CPUState *)penv->next_cpu;
}
@@ -932,14 +943,16 @@ void resume_all_vcpus(void)
static void qemu_tcg_init_vcpu(void *_env)
{
CPUState *env = _env;
+
/* share a single thread for all cpus with TCG */
if (!tcg_cpu_thread) {
env->thread = qemu_mallocz(sizeof(QemuThread));
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_tcg_cpu_thread_fn, env);
- while (env->created == 0)
+ while (env->created == 0) {
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+ }
tcg_cpu_thread = env->thread;
tcg_halt_cond = env->halt_cond;
} else {
@@ -954,8 +967,9 @@ static void qemu_kvm_start_vcpu(CPUState *env)
env->halt_cond = qemu_mallocz(sizeof(QemuCond));
qemu_cond_init(env->halt_cond);
qemu_thread_create(env->thread, qemu_kvm_cpu_thread_fn, env);
- while (env->created == 0)
+ while (env->created == 0) {
qemu_cond_timedwait(&qemu_cpu_cond, &qemu_global_mutex, 100);
+ }
}
void qemu_init_vcpu(void *_env)
@@ -964,10 +978,11 @@ void qemu_init_vcpu(void *_env)
env->nr_cores = smp_cores;
env->nr_threads = smp_threads;
- if (kvm_enabled())
+ if (kvm_enabled()) {
qemu_kvm_start_vcpu(env);
- else
+ } else {
qemu_tcg_init_vcpu(env);
+ }
}
void qemu_notify_event(void)
@@ -1050,16 +1065,18 @@ bool cpu_exec_all(void)
{
int r;
- if (next_cpu == NULL)
+ if (next_cpu == NULL) {
next_cpu = first_cpu;
+ }
for (; next_cpu != NULL && !exit_request; next_cpu = next_cpu->next_cpu) {
CPUState *env = next_cpu;
qemu_clock_enable(vm_clock,
(env->singlestep_enabled & SSTEP_NOTIMER) == 0);
- if (qemu_alarm_pending())
+ if (qemu_alarm_pending()) {
break;
+ }
if (cpu_can_run(env)) {
r = qemu_cpu_exec(env);
if (kvm_enabled()) {
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 26/37] Improve vm_stop reason declarations
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Define and use dedicated constants for vm_stop reasons, they actually
have nothing to do with the EXCP_* defines used so far. At this chance,
specify more detailed reasons so that VM state change handlers can
evaluate them.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 4 ++--
gdbstub.c | 19 ++++++++++---------
hw/ide/core.c | 2 +-
hw/scsi-disk.c | 2 +-
hw/virtio-blk.c | 2 +-
hw/watchdog.c | 2 +-
kvm-all.c | 2 +-
migration.c | 2 +-
monitor.c | 4 ++--
savevm.c | 4 ++--
sysemu.h | 10 ++++++++++
vl.c | 2 +-
12 files changed, 33 insertions(+), 22 deletions(-)
diff --git a/cpus.c b/cpus.c
index 802d15a..ca1f01d 100644
--- a/cpus.c
+++ b/cpus.c
@@ -168,8 +168,8 @@ static bool all_cpu_threads_idle(void)
static void cpu_debug_handler(CPUState *env)
{
gdb_set_stop_cpu(env);
- debug_requested = EXCP_DEBUG;
- vm_stop(EXCP_DEBUG);
+ debug_requested = VMSTOP_DEBUG;
+ vm_stop(VMSTOP_DEBUG);
}
#ifdef CONFIG_LINUX
diff --git a/gdbstub.c b/gdbstub.c
index d6556c9..ed51a8a 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -2194,14 +2194,14 @@ static void gdb_vm_state_change(void *opaque, int running, int reason)
const char *type;
int ret;
- if (running || (reason != EXCP_DEBUG && reason != EXCP_INTERRUPT) ||
- s->state == RS_INACTIVE || s->state == RS_SYSCALL)
+ if (running || (reason != VMSTOP_DEBUG && reason != VMSTOP_USER) ||
+ s->state == RS_INACTIVE || s->state == RS_SYSCALL) {
return;
-
+ }
/* disable single step if it was enable */
cpu_single_step(env, 0);
- if (reason == EXCP_DEBUG) {
+ if (reason == VMSTOP_DEBUG) {
if (env->watchpoint_hit) {
switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) {
case BP_MEM_READ:
@@ -2252,7 +2252,7 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
gdb_current_syscall_cb = cb;
s->state = RS_SYSCALL;
#ifndef CONFIG_USER_ONLY
- vm_stop(EXCP_DEBUG);
+ vm_stop(VMSTOP_DEBUG);
#endif
s->state = RS_IDLE;
va_start(va, fmt);
@@ -2326,7 +2326,7 @@ static void gdb_read_byte(GDBState *s, int ch)
if (vm_running) {
/* when the CPU is running, we cannot do anything except stop
it when receiving a char */
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
} else
#endif
{
@@ -2588,7 +2588,7 @@ static void gdb_chr_event(void *opaque, int event)
{
switch (event) {
case CHR_EVENT_OPENED:
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
gdb_has_xml = 0;
break;
default:
@@ -2628,8 +2628,9 @@ static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len)
#ifndef _WIN32
static void gdb_sigterm_handler(int signal)
{
- if (vm_running)
- vm_stop(EXCP_INTERRUPT);
+ if (vm_running) {
+ vm_stop(VMSTOP_USER);
+ }
}
#endif
diff --git a/hw/ide/core.c b/hw/ide/core.c
index dd63664..9c91a49 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -465,7 +465,7 @@ static int ide_handle_rw_error(IDEState *s, int error, int op)
s->bus->dma->ops->set_unit(s->bus->dma, s->unit);
s->bus->dma->ops->add_status(s->bus->dma, op);
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
if (op & BM_STATUS_DMA_RETRY) {
dma_buf_commit(s, 0);
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 488eedd..b05e654 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -239,7 +239,7 @@ static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type)
r->status |= SCSI_REQ_STATUS_RETRY | type;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
if (type == SCSI_REQ_STATUS_RETRY_READ) {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index ffac5a4..b14fb99 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -78,7 +78,7 @@ static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error,
req->next = s->rq;
s->rq = req;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read);
diff --git a/hw/watchdog.c b/hw/watchdog.c
index e9dd56e..1c900a1 100644
--- a/hw/watchdog.c
+++ b/hw/watchdog.c
@@ -132,7 +132,7 @@ void watchdog_perform_action(void)
case WDT_PAUSE: /* same as 'stop' command in monitor */
watchdog_mon_event("pause");
- vm_stop(0);
+ vm_stop(VMSTOP_WATCHDOG);
break;
case WDT_DEBUG:
diff --git a/kvm-all.c b/kvm-all.c
index 42dfed8..19cf188 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -994,7 +994,7 @@ int kvm_cpu_exec(CPUState *env)
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
- vm_stop(0);
+ vm_stop(VMSTOP_PANIC);
env->exit_request = 1;
}
if (env->exit_request) {
diff --git a/migration.c b/migration.c
index 3612572..af3a1f2 100644
--- a/migration.c
+++ b/migration.c
@@ -378,7 +378,7 @@ void migrate_fd_put_ready(void *opaque)
int old_vm_running = vm_running;
DPRINTF("done iterating\n");
- vm_stop(0);
+ vm_stop(VMSTOP_MIGRATE);
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
if (old_vm_running) {
diff --git a/monitor.c b/monitor.c
index 7fc311d..22ae3bb 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1255,7 +1255,7 @@ static void do_singlestep(Monitor *mon, const QDict *qdict)
*/
static int do_stop(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
return 0;
}
@@ -2783,7 +2783,7 @@ static void do_loadvm(Monitor *mon, const QDict *qdict)
int saved_vm_running = vm_running;
const char *name = qdict_get_str(qdict, "name");
- vm_stop(0);
+ vm_stop(VMSTOP_LOADVM);
if (load_vmstate(name) == 0 && saved_vm_running) {
vm_start();
diff --git a/savevm.c b/savevm.c
index 6d83b0f..a50fd31 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1575,7 +1575,7 @@ static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
int ret;
saved_vm_running = vm_running;
- vm_stop(0);
+ vm_stop(VMSTOP_SAVEVM);
if (qemu_savevm_state_blocked(mon)) {
ret = -EINVAL;
@@ -1904,7 +1904,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
}
saved_vm_running = vm_running;
- vm_stop(0);
+ vm_stop(VMSTOP_SAVEVM);
memset(sn, 0, sizeof(*sn));
diff --git a/sysemu.h b/sysemu.h
index 23ae17e..0628d3d 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -37,6 +37,16 @@ VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
void *opaque);
void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
+#define VMSTOP_USER 0
+#define VMSTOP_DEBUG 1
+#define VMSTOP_SHUTDOWN 2
+#define VMSTOP_DISKFULL 3
+#define VMSTOP_WATCHDOG 4
+#define VMSTOP_PANIC 5
+#define VMSTOP_SAVEVM 6
+#define VMSTOP_LOADVM 7
+#define VMSTOP_MIGRATE 8
+
void vm_start(void);
void vm_stop(int reason);
diff --git a/vl.c b/vl.c
index c9fa266..6d2d1d3 100644
--- a/vl.c
+++ b/vl.c
@@ -1433,7 +1433,7 @@ static void main_loop(void)
if (qemu_shutdown_requested()) {
monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
if (no_shutdown) {
- vm_stop(0);
+ vm_stop(VMSTOP_SHUTDOWN);
no_shutdown = 0;
} else
break;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 26/37] Improve vm_stop reason declarations
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Define and use dedicated constants for vm_stop reasons, they actually
have nothing to do with the EXCP_* defines used so far. At this chance,
specify more detailed reasons so that VM state change handlers can
evaluate them.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 4 ++--
gdbstub.c | 19 ++++++++++---------
hw/ide/core.c | 2 +-
hw/scsi-disk.c | 2 +-
hw/virtio-blk.c | 2 +-
hw/watchdog.c | 2 +-
kvm-all.c | 2 +-
migration.c | 2 +-
monitor.c | 4 ++--
savevm.c | 4 ++--
sysemu.h | 10 ++++++++++
vl.c | 2 +-
12 files changed, 33 insertions(+), 22 deletions(-)
diff --git a/cpus.c b/cpus.c
index 802d15a..ca1f01d 100644
--- a/cpus.c
+++ b/cpus.c
@@ -168,8 +168,8 @@ static bool all_cpu_threads_idle(void)
static void cpu_debug_handler(CPUState *env)
{
gdb_set_stop_cpu(env);
- debug_requested = EXCP_DEBUG;
- vm_stop(EXCP_DEBUG);
+ debug_requested = VMSTOP_DEBUG;
+ vm_stop(VMSTOP_DEBUG);
}
#ifdef CONFIG_LINUX
diff --git a/gdbstub.c b/gdbstub.c
index d6556c9..ed51a8a 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -2194,14 +2194,14 @@ static void gdb_vm_state_change(void *opaque, int running, int reason)
const char *type;
int ret;
- if (running || (reason != EXCP_DEBUG && reason != EXCP_INTERRUPT) ||
- s->state == RS_INACTIVE || s->state == RS_SYSCALL)
+ if (running || (reason != VMSTOP_DEBUG && reason != VMSTOP_USER) ||
+ s->state == RS_INACTIVE || s->state == RS_SYSCALL) {
return;
-
+ }
/* disable single step if it was enable */
cpu_single_step(env, 0);
- if (reason == EXCP_DEBUG) {
+ if (reason == VMSTOP_DEBUG) {
if (env->watchpoint_hit) {
switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) {
case BP_MEM_READ:
@@ -2252,7 +2252,7 @@ void gdb_do_syscall(gdb_syscall_complete_cb cb, const char *fmt, ...)
gdb_current_syscall_cb = cb;
s->state = RS_SYSCALL;
#ifndef CONFIG_USER_ONLY
- vm_stop(EXCP_DEBUG);
+ vm_stop(VMSTOP_DEBUG);
#endif
s->state = RS_IDLE;
va_start(va, fmt);
@@ -2326,7 +2326,7 @@ static void gdb_read_byte(GDBState *s, int ch)
if (vm_running) {
/* when the CPU is running, we cannot do anything except stop
it when receiving a char */
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
} else
#endif
{
@@ -2588,7 +2588,7 @@ static void gdb_chr_event(void *opaque, int event)
{
switch (event) {
case CHR_EVENT_OPENED:
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
gdb_has_xml = 0;
break;
default:
@@ -2628,8 +2628,9 @@ static int gdb_monitor_write(CharDriverState *chr, const uint8_t *buf, int len)
#ifndef _WIN32
static void gdb_sigterm_handler(int signal)
{
- if (vm_running)
- vm_stop(EXCP_INTERRUPT);
+ if (vm_running) {
+ vm_stop(VMSTOP_USER);
+ }
}
#endif
diff --git a/hw/ide/core.c b/hw/ide/core.c
index dd63664..9c91a49 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -465,7 +465,7 @@ static int ide_handle_rw_error(IDEState *s, int error, int op)
s->bus->dma->ops->set_unit(s->bus->dma, s->unit);
s->bus->dma->ops->add_status(s->bus->dma, op);
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
if (op & BM_STATUS_DMA_RETRY) {
dma_buf_commit(s, 0);
diff --git a/hw/scsi-disk.c b/hw/scsi-disk.c
index 488eedd..b05e654 100644
--- a/hw/scsi-disk.c
+++ b/hw/scsi-disk.c
@@ -239,7 +239,7 @@ static int scsi_handle_rw_error(SCSIDiskReq *r, int error, int type)
r->status |= SCSI_REQ_STATUS_RETRY | type;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
if (type == SCSI_REQ_STATUS_RETRY_READ) {
r->req.bus->complete(r->req.bus, SCSI_REASON_DATA, r->req.tag, 0);
diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index ffac5a4..b14fb99 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -78,7 +78,7 @@ static int virtio_blk_handle_rw_error(VirtIOBlockReq *req, int error,
req->next = s->rq;
s->rq = req;
bdrv_mon_event(s->bs, BDRV_ACTION_STOP, is_read);
- vm_stop(0);
+ vm_stop(VMSTOP_DISKFULL);
} else {
virtio_blk_req_complete(req, VIRTIO_BLK_S_IOERR);
bdrv_mon_event(s->bs, BDRV_ACTION_REPORT, is_read);
diff --git a/hw/watchdog.c b/hw/watchdog.c
index e9dd56e..1c900a1 100644
--- a/hw/watchdog.c
+++ b/hw/watchdog.c
@@ -132,7 +132,7 @@ void watchdog_perform_action(void)
case WDT_PAUSE: /* same as 'stop' command in monitor */
watchdog_mon_event("pause");
- vm_stop(0);
+ vm_stop(VMSTOP_WATCHDOG);
break;
case WDT_DEBUG:
diff --git a/kvm-all.c b/kvm-all.c
index 42dfed8..19cf188 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -994,7 +994,7 @@ int kvm_cpu_exec(CPUState *env)
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
- vm_stop(0);
+ vm_stop(VMSTOP_PANIC);
env->exit_request = 1;
}
if (env->exit_request) {
diff --git a/migration.c b/migration.c
index 3612572..af3a1f2 100644
--- a/migration.c
+++ b/migration.c
@@ -378,7 +378,7 @@ void migrate_fd_put_ready(void *opaque)
int old_vm_running = vm_running;
DPRINTF("done iterating\n");
- vm_stop(0);
+ vm_stop(VMSTOP_MIGRATE);
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
if (old_vm_running) {
diff --git a/monitor.c b/monitor.c
index 7fc311d..22ae3bb 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1255,7 +1255,7 @@ static void do_singlestep(Monitor *mon, const QDict *qdict)
*/
static int do_stop(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
- vm_stop(EXCP_INTERRUPT);
+ vm_stop(VMSTOP_USER);
return 0;
}
@@ -2783,7 +2783,7 @@ static void do_loadvm(Monitor *mon, const QDict *qdict)
int saved_vm_running = vm_running;
const char *name = qdict_get_str(qdict, "name");
- vm_stop(0);
+ vm_stop(VMSTOP_LOADVM);
if (load_vmstate(name) == 0 && saved_vm_running) {
vm_start();
diff --git a/savevm.c b/savevm.c
index 6d83b0f..a50fd31 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1575,7 +1575,7 @@ static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
int ret;
saved_vm_running = vm_running;
- vm_stop(0);
+ vm_stop(VMSTOP_SAVEVM);
if (qemu_savevm_state_blocked(mon)) {
ret = -EINVAL;
@@ -1904,7 +1904,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
}
saved_vm_running = vm_running;
- vm_stop(0);
+ vm_stop(VMSTOP_SAVEVM);
memset(sn, 0, sizeof(*sn));
diff --git a/sysemu.h b/sysemu.h
index 23ae17e..0628d3d 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -37,6 +37,16 @@ VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
void *opaque);
void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
+#define VMSTOP_USER 0
+#define VMSTOP_DEBUG 1
+#define VMSTOP_SHUTDOWN 2
+#define VMSTOP_DISKFULL 3
+#define VMSTOP_WATCHDOG 4
+#define VMSTOP_PANIC 5
+#define VMSTOP_SAVEVM 6
+#define VMSTOP_LOADVM 7
+#define VMSTOP_MIGRATE 8
+
void vm_start(void);
void vm_stop(int reason);
diff --git a/vl.c b/vl.c
index c9fa266..6d2d1d3 100644
--- a/vl.c
+++ b/vl.c
@@ -1433,7 +1433,7 @@ static void main_loop(void)
if (qemu_shutdown_requested()) {
monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
if (no_shutdown) {
- vm_stop(0);
+ vm_stop(VMSTOP_SHUTDOWN);
no_shutdown = 0;
} else
break;
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 27/37] Refactor debug and vmstop request interface
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Instead of fiddling with debug_requested and vmstop_requested directly,
introduce qemu_system_debug_request and turn qemu_system_vmstop_request
into a public interface. This aligns those services with exiting ones in
vl.c.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 9 +--------
cpus.h | 2 --
sysemu.h | 2 ++
vl.c | 20 ++++++++++++++++----
4 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/cpus.c b/cpus.c
index ca1f01d..97a6d4f 100644
--- a/cpus.c
+++ b/cpus.c
@@ -168,8 +168,7 @@ static bool all_cpu_threads_idle(void)
static void cpu_debug_handler(CPUState *env)
{
gdb_set_stop_cpu(env);
- debug_requested = VMSTOP_DEBUG;
- vm_stop(VMSTOP_DEBUG);
+ qemu_system_debug_request();
}
#ifdef CONFIG_LINUX
@@ -990,12 +989,6 @@ void qemu_notify_event(void)
qemu_event_increment();
}
-static void qemu_system_vmstop_request(int reason)
-{
- vmstop_requested = reason;
- qemu_notify_event();
-}
-
void cpu_stop_current(void)
{
if (cpu_single_env) {
diff --git a/cpus.h b/cpus.h
index 4cadb64..e021126 100644
--- a/cpus.h
+++ b/cpus.h
@@ -11,8 +11,6 @@ void cpu_stop_current(void);
/* vl.c */
extern int smp_cores;
extern int smp_threads;
-extern int debug_requested;
-extern int vmstop_requested;
void vm_state_notify(int running, int reason);
bool cpu_exec_all(void);
void set_numa_modes(void);
diff --git a/sysemu.h b/sysemu.h
index 0628d3d..0a83ab9 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -61,6 +61,8 @@ void cpu_disable_ticks(void);
void qemu_system_reset_request(void);
void qemu_system_shutdown_request(void);
void qemu_system_powerdown_request(void);
+void qemu_system_debug_request(void);
+void qemu_system_vmstop_request(int reason);
int qemu_shutdown_requested(void);
int qemu_reset_requested(void);
int qemu_powerdown_requested(void);
diff --git a/vl.c b/vl.c
index 6d2d1d3..eebe684 100644
--- a/vl.c
+++ b/vl.c
@@ -1217,8 +1217,8 @@ static QTAILQ_HEAD(reset_handlers, QEMUResetEntry) reset_handlers =
static int reset_requested;
static int shutdown_requested;
static int powerdown_requested;
-int debug_requested;
-int vmstop_requested;
+static int debug_requested;
+static int vmstop_requested;
int qemu_shutdown_requested(void)
{
@@ -1312,6 +1312,18 @@ void qemu_system_powerdown_request(void)
qemu_notify_event();
}
+void qemu_system_debug_request(void)
+{
+ debug_requested = 1;
+ vm_stop(VMSTOP_DEBUG);
+}
+
+void qemu_system_vmstop_request(int reason)
+{
+ vmstop_requested = reason;
+ qemu_notify_event();
+}
+
void main_loop_wait(int nonblocking)
{
IOHandlerRecord *ioh;
@@ -1427,8 +1439,8 @@ static void main_loop(void)
dev_time += profile_getclock() - ti;
#endif
- if ((r = qemu_debug_requested())) {
- vm_stop(r);
+ if (qemu_debug_requested()) {
+ vm_stop(VMSTOP_DEBUG);
}
if (qemu_shutdown_requested()) {
monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 27/37] Refactor debug and vmstop request interface
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Instead of fiddling with debug_requested and vmstop_requested directly,
introduce qemu_system_debug_request and turn qemu_system_vmstop_request
into a public interface. This aligns those services with exiting ones in
vl.c.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpus.c | 9 +--------
cpus.h | 2 --
sysemu.h | 2 ++
vl.c | 20 ++++++++++++++++----
4 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/cpus.c b/cpus.c
index ca1f01d..97a6d4f 100644
--- a/cpus.c
+++ b/cpus.c
@@ -168,8 +168,7 @@ static bool all_cpu_threads_idle(void)
static void cpu_debug_handler(CPUState *env)
{
gdb_set_stop_cpu(env);
- debug_requested = VMSTOP_DEBUG;
- vm_stop(VMSTOP_DEBUG);
+ qemu_system_debug_request();
}
#ifdef CONFIG_LINUX
@@ -990,12 +989,6 @@ void qemu_notify_event(void)
qemu_event_increment();
}
-static void qemu_system_vmstop_request(int reason)
-{
- vmstop_requested = reason;
- qemu_notify_event();
-}
-
void cpu_stop_current(void)
{
if (cpu_single_env) {
diff --git a/cpus.h b/cpus.h
index 4cadb64..e021126 100644
--- a/cpus.h
+++ b/cpus.h
@@ -11,8 +11,6 @@ void cpu_stop_current(void);
/* vl.c */
extern int smp_cores;
extern int smp_threads;
-extern int debug_requested;
-extern int vmstop_requested;
void vm_state_notify(int running, int reason);
bool cpu_exec_all(void);
void set_numa_modes(void);
diff --git a/sysemu.h b/sysemu.h
index 0628d3d..0a83ab9 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -61,6 +61,8 @@ void cpu_disable_ticks(void);
void qemu_system_reset_request(void);
void qemu_system_shutdown_request(void);
void qemu_system_powerdown_request(void);
+void qemu_system_debug_request(void);
+void qemu_system_vmstop_request(int reason);
int qemu_shutdown_requested(void);
int qemu_reset_requested(void);
int qemu_powerdown_requested(void);
diff --git a/vl.c b/vl.c
index 6d2d1d3..eebe684 100644
--- a/vl.c
+++ b/vl.c
@@ -1217,8 +1217,8 @@ static QTAILQ_HEAD(reset_handlers, QEMUResetEntry) reset_handlers =
static int reset_requested;
static int shutdown_requested;
static int powerdown_requested;
-int debug_requested;
-int vmstop_requested;
+static int debug_requested;
+static int vmstop_requested;
int qemu_shutdown_requested(void)
{
@@ -1312,6 +1312,18 @@ void qemu_system_powerdown_request(void)
qemu_notify_event();
}
+void qemu_system_debug_request(void)
+{
+ debug_requested = 1;
+ vm_stop(VMSTOP_DEBUG);
+}
+
+void qemu_system_vmstop_request(int reason)
+{
+ vmstop_requested = reason;
+ qemu_notify_event();
+}
+
void main_loop_wait(int nonblocking)
{
IOHandlerRecord *ioh;
@@ -1427,8 +1439,8 @@ static void main_loop(void)
dev_time += profile_getclock() - ti;
#endif
- if ((r = qemu_debug_requested())) {
- vm_stop(r);
+ if (qemu_debug_requested()) {
+ vm_stop(VMSTOP_DEBUG);
}
if (qemu_shutdown_requested()) {
monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 28/37] Move debug exception handling out of cpu_exec
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
To prepare splitting up KVM and TCG CPU entry/exit, move the debug
exception into cpus.c and invoke cpu_handle_debug_exception on return
from qemu_cpu_exec.
This also allows to clean up the debug request signaling: We can assign
the job of informing main-loop to qemu_system_debug_request and stop the
calling cpu directly in cpu_handle_debug_exception. That means a debug
stop will now only be signaled via debug_requested and not additionally
via vmstop_requested.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-exec.c | 24 ------------------------
cpus.c | 35 ++++++++++++++++++++++++++++++-----
vl.c | 2 +-
3 files changed, 31 insertions(+), 30 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 8c9fb8b..9c0b10d 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -196,28 +196,6 @@ static inline TranslationBlock *tb_find_fast(void)
return tb;
}
-static CPUDebugExcpHandler *debug_excp_handler;
-
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
-{
- CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
- debug_excp_handler = handler;
- return old_handler;
-}
-
-static void cpu_handle_debug_exception(CPUState *env)
-{
- CPUWatchpoint *wp;
-
- if (!env->watchpoint_hit)
- QTAILQ_FOREACH(wp, &env->watchpoints, entry)
- wp->flags &= ~BP_WATCHPOINT_HIT;
-
- if (debug_excp_handler)
- debug_excp_handler(env);
-}
-
/* main execution loop */
volatile sig_atomic_t exit_request;
@@ -287,8 +265,6 @@ int cpu_exec(CPUState *env1)
if (env->exception_index >= EXCP_INTERRUPT) {
/* exit request from the cpu execution loop */
ret = env->exception_index;
- if (ret == EXCP_DEBUG)
- cpu_handle_debug_exception(env);
break;
} else {
#if defined(CONFIG_USER_ONLY)
diff --git a/cpus.c b/cpus.c
index 97a6d4f..c7e86c2 100644
--- a/cpus.c
+++ b/cpus.c
@@ -165,10 +165,34 @@ static bool all_cpu_threads_idle(void)
return true;
}
-static void cpu_debug_handler(CPUState *env)
+static CPUDebugExcpHandler *debug_excp_handler;
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+{
+ CPUDebugExcpHandler *old_handler = debug_excp_handler;
+
+ debug_excp_handler = handler;
+ return old_handler;
+}
+
+static void cpu_handle_debug_exception(CPUState *env)
{
+ CPUWatchpoint *wp;
+
+ if (!env->watchpoint_hit) {
+ QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
+ wp->flags &= ~BP_WATCHPOINT_HIT;
+ }
+ }
+ if (debug_excp_handler) {
+ debug_excp_handler(env);
+ }
+
gdb_set_stop_cpu(env);
qemu_system_debug_request();
+#ifdef CONFIG_IOTHREAD
+ env->stopped = 1;
+#endif
}
#ifdef CONFIG_LINUX
@@ -479,7 +503,6 @@ int qemu_init_main_loop(void)
return ret;
}
#endif
- cpu_set_debug_excp_handler(cpu_debug_handler);
qemu_init_sigbus();
@@ -653,8 +676,6 @@ int qemu_init_main_loop(void)
int ret;
sigset_t blocked_signals;
- cpu_set_debug_excp_handler(cpu_debug_handler);
-
qemu_init_sigbus();
blocked_signals = block_io_signals();
@@ -808,7 +829,10 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
while (1) {
if (cpu_can_run(env)) {
- qemu_cpu_exec(env);
+ r = qemu_cpu_exec(env);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
+ }
}
qemu_kvm_wait_io_event(env);
}
@@ -1076,6 +1100,7 @@ bool cpu_exec_all(void)
qemu_kvm_eat_signals(env);
}
if (r == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
break;
}
} else if (env->stop) {
diff --git a/vl.c b/vl.c
index eebe684..b436952 100644
--- a/vl.c
+++ b/vl.c
@@ -1315,7 +1315,7 @@ void qemu_system_powerdown_request(void)
void qemu_system_debug_request(void)
{
debug_requested = 1;
- vm_stop(VMSTOP_DEBUG);
+ qemu_notify_event();
}
void qemu_system_vmstop_request(int reason)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
To prepare splitting up KVM and TCG CPU entry/exit, move the debug
exception into cpus.c and invoke cpu_handle_debug_exception on return
from qemu_cpu_exec.
This also allows to clean up the debug request signaling: We can assign
the job of informing main-loop to qemu_system_debug_request and stop the
calling cpu directly in cpu_handle_debug_exception. That means a debug
stop will now only be signaled via debug_requested and not additionally
via vmstop_requested.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-exec.c | 24 ------------------------
cpus.c | 35 ++++++++++++++++++++++++++++++-----
vl.c | 2 +-
3 files changed, 31 insertions(+), 30 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 8c9fb8b..9c0b10d 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -196,28 +196,6 @@ static inline TranslationBlock *tb_find_fast(void)
return tb;
}
-static CPUDebugExcpHandler *debug_excp_handler;
-
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
-{
- CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
- debug_excp_handler = handler;
- return old_handler;
-}
-
-static void cpu_handle_debug_exception(CPUState *env)
-{
- CPUWatchpoint *wp;
-
- if (!env->watchpoint_hit)
- QTAILQ_FOREACH(wp, &env->watchpoints, entry)
- wp->flags &= ~BP_WATCHPOINT_HIT;
-
- if (debug_excp_handler)
- debug_excp_handler(env);
-}
-
/* main execution loop */
volatile sig_atomic_t exit_request;
@@ -287,8 +265,6 @@ int cpu_exec(CPUState *env1)
if (env->exception_index >= EXCP_INTERRUPT) {
/* exit request from the cpu execution loop */
ret = env->exception_index;
- if (ret == EXCP_DEBUG)
- cpu_handle_debug_exception(env);
break;
} else {
#if defined(CONFIG_USER_ONLY)
diff --git a/cpus.c b/cpus.c
index 97a6d4f..c7e86c2 100644
--- a/cpus.c
+++ b/cpus.c
@@ -165,10 +165,34 @@ static bool all_cpu_threads_idle(void)
return true;
}
-static void cpu_debug_handler(CPUState *env)
+static CPUDebugExcpHandler *debug_excp_handler;
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+{
+ CPUDebugExcpHandler *old_handler = debug_excp_handler;
+
+ debug_excp_handler = handler;
+ return old_handler;
+}
+
+static void cpu_handle_debug_exception(CPUState *env)
{
+ CPUWatchpoint *wp;
+
+ if (!env->watchpoint_hit) {
+ QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
+ wp->flags &= ~BP_WATCHPOINT_HIT;
+ }
+ }
+ if (debug_excp_handler) {
+ debug_excp_handler(env);
+ }
+
gdb_set_stop_cpu(env);
qemu_system_debug_request();
+#ifdef CONFIG_IOTHREAD
+ env->stopped = 1;
+#endif
}
#ifdef CONFIG_LINUX
@@ -479,7 +503,6 @@ int qemu_init_main_loop(void)
return ret;
}
#endif
- cpu_set_debug_excp_handler(cpu_debug_handler);
qemu_init_sigbus();
@@ -653,8 +676,6 @@ int qemu_init_main_loop(void)
int ret;
sigset_t blocked_signals;
- cpu_set_debug_excp_handler(cpu_debug_handler);
-
qemu_init_sigbus();
blocked_signals = block_io_signals();
@@ -808,7 +829,10 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
while (1) {
if (cpu_can_run(env)) {
- qemu_cpu_exec(env);
+ r = qemu_cpu_exec(env);
+ if (r == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
+ }
}
qemu_kvm_wait_io_event(env);
}
@@ -1076,6 +1100,7 @@ bool cpu_exec_all(void)
qemu_kvm_eat_signals(env);
}
if (r == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
break;
}
} else if (env->stop) {
diff --git a/vl.c b/vl.c
index eebe684..b436952 100644
--- a/vl.c
+++ b/vl.c
@@ -1315,7 +1315,7 @@ void qemu_system_powerdown_request(void)
void qemu_system_debug_request(void)
{
debug_requested = 1;
- vm_stop(VMSTOP_DEBUG);
+ qemu_notify_event();
}
void qemu_system_vmstop_request(int reason)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-03-07 1:52 ` TeLeMan
-1 siblings, 0 replies; 85+ messages in thread
From: TeLeMan @ 2011-03-07 1:52 UTC (permalink / raw)
To: Jan Kiszka; +Cc: Marcelo Tosatti, Anthony Liguori, qemu-devel, kvm
This patch breaks the support for x86 hardware breakpoints because
cpu_resume_from_signal() and raise_exception_env() are used in
breakpoint_handler().
^ permalink raw reply [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
@ 2011-03-07 1:52 ` TeLeMan
0 siblings, 0 replies; 85+ messages in thread
From: TeLeMan @ 2011-03-07 1:52 UTC (permalink / raw)
To: Jan Kiszka; +Cc: Anthony Liguori, Marcelo Tosatti, qemu-devel, kvm
This patch breaks the support for x86 hardware breakpoints because
cpu_resume_from_signal() and raise_exception_env() are used in
breakpoint_handler().
^ permalink raw reply [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
2011-03-07 1:52 ` TeLeMan
@ 2011-03-07 8:26 ` Jan Kiszka
-1 siblings, 0 replies; 85+ messages in thread
From: Jan Kiszka @ 2011-03-07 8:26 UTC (permalink / raw)
To: TeLeMan; +Cc: Marcelo Tosatti, Anthony Liguori, qemu-devel, kvm
[-- Attachment #1: Type: text/plain, Size: 312 bytes --]
On 2011-03-07 02:52, TeLeMan wrote:
> This patch breaks the support for x86 hardware breakpoints because
> cpu_resume_from_signal() and raise_exception_env() are used in
> breakpoint_handler().
Yeah, unfortunately true. The TCG bits of this refactoring have to be
moved back. Will fix.
Thanks,
Jan
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 259 bytes --]
^ permalink raw reply [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
@ 2011-03-07 8:26 ` Jan Kiszka
0 siblings, 0 replies; 85+ messages in thread
From: Jan Kiszka @ 2011-03-07 8:26 UTC (permalink / raw)
To: TeLeMan; +Cc: Anthony Liguori, Marcelo Tosatti, qemu-devel, kvm
[-- Attachment #1: Type: text/plain, Size: 312 bytes --]
On 2011-03-07 02:52, TeLeMan wrote:
> This patch breaks the support for x86 hardware breakpoints because
> cpu_resume_from_signal() and raise_exception_env() are used in
> breakpoint_handler().
Yeah, unfortunately true. The TCG bits of this refactoring have to be
moved back. Will fix.
Thanks,
Jan
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^ permalink raw reply [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
2011-03-07 8:26 ` Jan Kiszka
@ 2011-03-07 8:54 ` Jan Kiszka
-1 siblings, 0 replies; 85+ messages in thread
From: Jan Kiszka @ 2011-03-07 8:54 UTC (permalink / raw)
To: TeLeMan; +Cc: Marcelo Tosatti, Anthony Liguori, qemu-devel, kvm
[-- Attachment #1: Type: text/plain, Size: 3348 bytes --]
On 2011-03-07 09:26, Jan Kiszka wrote:
> On 2011-03-07 02:52, TeLeMan wrote:
>> This patch breaks the support for x86 hardware breakpoints because
>> cpu_resume_from_signal() and raise_exception_env() are used in
>> breakpoint_handler().
>
> Yeah, unfortunately true. The TCG bits of this refactoring have to be
> moved back. Will fix.
This seems to do the trick, but I haven't tested all scenarios yet.
Jan
---
diff --git a/cpu-exec.c b/cpu-exec.c
index b03b3a7..0333617 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -196,6 +196,30 @@ static inline TranslationBlock *tb_find_fast(void)
return tb;
}
+static CPUDebugExcpHandler *debug_excp_handler;
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+{
+ CPUDebugExcpHandler *old_handler = debug_excp_handler;
+
+ debug_excp_handler = handler;
+ return old_handler;
+}
+
+static void cpu_handle_debug_exception(CPUState *env)
+{
+ CPUWatchpoint *wp;
+
+ if (!env->watchpoint_hit) {
+ QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
+ wp->flags &= ~BP_WATCHPOINT_HIT;
+ }
+ }
+ if (debug_excp_handler) {
+ debug_excp_handler(env);
+ }
+}
+
/* main execution loop */
volatile sig_atomic_t exit_request;
@@ -263,6 +287,9 @@ int cpu_exec(CPUState *env1)
if (env->exception_index >= EXCP_INTERRUPT) {
/* exit request from the cpu execution loop */
ret = env->exception_index;
+ if (ret == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
+ }
break;
} else {
#if defined(CONFIG_USER_ONLY)
diff --git a/cpus.c b/cpus.c
index 0f1ae50..d41a0ce 100644
--- a/cpus.c
+++ b/cpus.c
@@ -166,29 +166,8 @@ static bool all_cpu_threads_idle(void)
return true;
}
-static CPUDebugExcpHandler *debug_excp_handler;
-
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
-{
- CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
- debug_excp_handler = handler;
- return old_handler;
-}
-
-static void cpu_handle_debug_exception(CPUState *env)
+static void cpu_handle_guest_debug(CPUState *env)
{
- CPUWatchpoint *wp;
-
- if (!env->watchpoint_hit) {
- QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
- wp->flags &= ~BP_WATCHPOINT_HIT;
- }
- }
- if (debug_excp_handler) {
- debug_excp_handler(env);
- }
-
gdb_set_stop_cpu(env);
qemu_system_debug_request();
#ifdef CONFIG_IOTHREAD
@@ -836,7 +815,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
if (cpu_can_run(env)) {
r = kvm_cpu_exec(env);
if (r == EXCP_DEBUG) {
- cpu_handle_debug_exception(env);
+ cpu_handle_guest_debug(env);
}
}
qemu_kvm_wait_io_event(env);
@@ -1106,7 +1085,7 @@ bool cpu_exec_all(void)
r = tcg_cpu_exec(env);
}
if (r == EXCP_DEBUG) {
- cpu_handle_debug_exception(env);
+ cpu_handle_guest_debug(env);
break;
}
} else if (env->stop || env->stopped) {
--
1.7.1
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^ permalink raw reply related [flat|nested] 85+ messages in thread* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
@ 2011-03-07 8:54 ` Jan Kiszka
0 siblings, 0 replies; 85+ messages in thread
From: Jan Kiszka @ 2011-03-07 8:54 UTC (permalink / raw)
To: TeLeMan; +Cc: Anthony Liguori, Marcelo Tosatti, qemu-devel, kvm
[-- Attachment #1: Type: text/plain, Size: 3348 bytes --]
On 2011-03-07 09:26, Jan Kiszka wrote:
> On 2011-03-07 02:52, TeLeMan wrote:
>> This patch breaks the support for x86 hardware breakpoints because
>> cpu_resume_from_signal() and raise_exception_env() are used in
>> breakpoint_handler().
>
> Yeah, unfortunately true. The TCG bits of this refactoring have to be
> moved back. Will fix.
This seems to do the trick, but I haven't tested all scenarios yet.
Jan
---
diff --git a/cpu-exec.c b/cpu-exec.c
index b03b3a7..0333617 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -196,6 +196,30 @@ static inline TranslationBlock *tb_find_fast(void)
return tb;
}
+static CPUDebugExcpHandler *debug_excp_handler;
+
+CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+{
+ CPUDebugExcpHandler *old_handler = debug_excp_handler;
+
+ debug_excp_handler = handler;
+ return old_handler;
+}
+
+static void cpu_handle_debug_exception(CPUState *env)
+{
+ CPUWatchpoint *wp;
+
+ if (!env->watchpoint_hit) {
+ QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
+ wp->flags &= ~BP_WATCHPOINT_HIT;
+ }
+ }
+ if (debug_excp_handler) {
+ debug_excp_handler(env);
+ }
+}
+
/* main execution loop */
volatile sig_atomic_t exit_request;
@@ -263,6 +287,9 @@ int cpu_exec(CPUState *env1)
if (env->exception_index >= EXCP_INTERRUPT) {
/* exit request from the cpu execution loop */
ret = env->exception_index;
+ if (ret == EXCP_DEBUG) {
+ cpu_handle_debug_exception(env);
+ }
break;
} else {
#if defined(CONFIG_USER_ONLY)
diff --git a/cpus.c b/cpus.c
index 0f1ae50..d41a0ce 100644
--- a/cpus.c
+++ b/cpus.c
@@ -166,29 +166,8 @@ static bool all_cpu_threads_idle(void)
return true;
}
-static CPUDebugExcpHandler *debug_excp_handler;
-
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
-{
- CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
- debug_excp_handler = handler;
- return old_handler;
-}
-
-static void cpu_handle_debug_exception(CPUState *env)
+static void cpu_handle_guest_debug(CPUState *env)
{
- CPUWatchpoint *wp;
-
- if (!env->watchpoint_hit) {
- QTAILQ_FOREACH(wp, &env->watchpoints, entry) {
- wp->flags &= ~BP_WATCHPOINT_HIT;
- }
- }
- if (debug_excp_handler) {
- debug_excp_handler(env);
- }
-
gdb_set_stop_cpu(env);
qemu_system_debug_request();
#ifdef CONFIG_IOTHREAD
@@ -836,7 +815,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
if (cpu_can_run(env)) {
r = kvm_cpu_exec(env);
if (r == EXCP_DEBUG) {
- cpu_handle_debug_exception(env);
+ cpu_handle_guest_debug(env);
}
}
qemu_kvm_wait_io_event(env);
@@ -1106,7 +1085,7 @@ bool cpu_exec_all(void)
r = tcg_cpu_exec(env);
}
if (r == EXCP_DEBUG) {
- cpu_handle_debug_exception(env);
+ cpu_handle_guest_debug(env);
break;
}
} else if (env->stop || env->stopped) {
--
1.7.1
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^ permalink raw reply related [flat|nested] 85+ messages in thread* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
2011-03-07 8:54 ` Jan Kiszka
@ 2011-03-07 10:12 ` TeLeMan
-1 siblings, 0 replies; 85+ messages in thread
From: TeLeMan @ 2011-03-07 10:12 UTC (permalink / raw)
To: Jan Kiszka; +Cc: Marcelo Tosatti, Anthony Liguori, qemu-devel, kvm
On Mon, Mar 7, 2011 at 16:54, Jan Kiszka <jan.kiszka@web.de> wrote:
> On 2011-03-07 09:26, Jan Kiszka wrote:
>> On 2011-03-07 02:52, TeLeMan wrote:
>>> This patch breaks the support for x86 hardware breakpoints because
>>> cpu_resume_from_signal() and raise_exception_env() are used in
>>> breakpoint_handler().
>>
>> Yeah, unfortunately true. The TCG bits of this refactoring have to be
>> moved back. Will fix.
>
> This seems to do the trick, but I haven't tested all scenarios yet.
Tested, x86 hardware breakpoints become working.
^ permalink raw reply [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 28/37] Move debug exception handling out of cpu_exec
@ 2011-03-07 10:12 ` TeLeMan
0 siblings, 0 replies; 85+ messages in thread
From: TeLeMan @ 2011-03-07 10:12 UTC (permalink / raw)
To: Jan Kiszka; +Cc: Anthony Liguori, Marcelo Tosatti, qemu-devel, kvm
On Mon, Mar 7, 2011 at 16:54, Jan Kiszka <jan.kiszka@web.de> wrote:
> On 2011-03-07 09:26, Jan Kiszka wrote:
>> On 2011-03-07 02:52, TeLeMan wrote:
>>> This patch breaks the support for x86 hardware breakpoints because
>>> cpu_resume_from_signal() and raise_exception_env() are used in
>>> breakpoint_handler().
>>
>> Yeah, unfortunately true. The TCG bits of this refactoring have to be
>> moved back. Will fix.
>
> This seems to do the trick, but I haven't tested all scenarios yet.
Tested, x86 hardware breakpoints become working.
^ permalink raw reply [flat|nested] 85+ messages in thread
* [PATCH 29/37] kvm: Separate TCG from KVM cpu execution
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Mixing up TCG bits with KVM already led to problems around eflags
emulation on x86. Moreover, quite some code that TCG requires on cpu
enty/exit is useless for KVM. So dispatch between tcg_cpu_exec and
kvm_cpu_exec as early as possible.
The core logic of cpu_halted from cpu_exec is added to
kvm_arch_process_irqchip_events. Moving away from cpu_exec makes
exception_index meaningless for KVM, we can simply pass the exit reason
directly (only "EXCP_DEBUG vs. rest" is relevant).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-exec.c | 19 ++++++-------------
cpus.c | 10 +++++-----
kvm-all.c | 19 +++++++++----------
target-i386/kvm.c | 6 +++---
4 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 9c0b10d..b03b3a7 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -226,13 +226,11 @@ int cpu_exec(CPUState *env1)
}
#if defined(TARGET_I386)
- if (!kvm_enabled()) {
- /* put eflags in CPU temporary format */
- CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- DF = 1 - (2 * ((env->eflags >> 10) & 1));
- CC_OP = CC_OP_EFLAGS;
- env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- }
+ /* put eflags in CPU temporary format */
+ CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+ DF = 1 - (2 * ((env->eflags >> 10) & 1));
+ CC_OP = CC_OP_EFLAGS;
+ env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
#elif defined(TARGET_SPARC)
#elif defined(TARGET_M68K)
env->cc_op = CC_OP_FLAGS;
@@ -257,7 +255,7 @@ int cpu_exec(CPUState *env1)
if (setjmp(env->jmp_env) == 0) {
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
#undef env
- env = cpu_single_env;
+ env = cpu_single_env;
#define env cpu_single_env
#endif
/* if an exception is pending, we execute it here */
@@ -316,11 +314,6 @@ int cpu_exec(CPUState *env1)
}
}
- if (kvm_enabled()) {
- kvm_cpu_exec(env);
- longjmp(env->jmp_env, 1);
- }
-
next_tb = 0; /* force lookup of first TB */
for(;;) {
interrupt_request = env->interrupt_request;
diff --git a/cpus.c b/cpus.c
index c7e86c2..468544c 100644
--- a/cpus.c
+++ b/cpus.c
@@ -800,8 +800,6 @@ static void qemu_kvm_wait_io_event(CPUState *env)
qemu_wait_io_event_common(env);
}
-static int qemu_cpu_exec(CPUState *env);
-
static void *qemu_kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
@@ -829,7 +827,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
while (1) {
if (cpu_can_run(env)) {
- r = qemu_cpu_exec(env);
+ r = kvm_cpu_exec(env);
if (r == EXCP_DEBUG) {
cpu_handle_debug_exception(env);
}
@@ -1040,7 +1038,7 @@ void vm_stop(int reason)
#endif
-static int qemu_cpu_exec(CPUState *env)
+static int tcg_cpu_exec(CPUState *env)
{
int ret;
#ifdef CONFIG_PROFILER
@@ -1095,9 +1093,11 @@ bool cpu_exec_all(void)
break;
}
if (cpu_can_run(env)) {
- r = qemu_cpu_exec(env);
if (kvm_enabled()) {
+ r = kvm_cpu_exec(env);
qemu_kvm_eat_signals(env);
+ } else {
+ r = tcg_cpu_exec(env);
}
if (r == EXCP_DEBUG) {
cpu_handle_debug_exception(env);
diff --git a/kvm-all.c b/kvm-all.c
index 19cf188..802c6b8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -895,10 +895,11 @@ int kvm_cpu_exec(CPUState *env)
if (kvm_arch_process_irqchip_events(env)) {
env->exit_request = 0;
- env->exception_index = EXCP_HLT;
- return 0;
+ return EXCP_HLT;
}
+ cpu_single_env = env;
+
do {
if (env->kvm_vcpu_dirty) {
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
@@ -927,7 +928,6 @@ int kvm_cpu_exec(CPUState *env)
kvm_flush_coalesced_mmio_buffer();
if (ret == -EINTR || ret == -EAGAIN) {
- cpu_exit(env);
DPRINTF("io window exit\n");
ret = 0;
break;
@@ -978,8 +978,8 @@ int kvm_cpu_exec(CPUState *env)
DPRINTF("kvm_exit_debug\n");
#ifdef KVM_CAP_SET_GUEST_DEBUG
if (kvm_arch_debug(&run->debug.arch)) {
- env->exception_index = EXCP_DEBUG;
- return 0;
+ ret = EXCP_DEBUG;
+ goto out;
}
/* re-enter, this exception was guest-internal */
ret = 1;
@@ -995,13 +995,12 @@ int kvm_cpu_exec(CPUState *env)
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
vm_stop(VMSTOP_PANIC);
- env->exit_request = 1;
- }
- if (env->exit_request) {
- env->exit_request = 0;
- env->exception_index = EXCP_INTERRUPT;
}
+ ret = EXCP_INTERRUPT;
+out:
+ env->exit_request = 0;
+ cpu_single_env = NULL;
return ret;
}
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index ba183c4..377a0a3 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1502,12 +1502,13 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
int kvm_arch_process_irqchip_events(CPUState *env)
{
+ if (env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI)) {
+ env->halted = 0;
+ }
if (env->interrupt_request & CPU_INTERRUPT_INIT) {
kvm_cpu_synchronize_state(env);
do_cpu_init(env);
- env->exception_index = EXCP_HALTED;
}
-
if (env->interrupt_request & CPU_INTERRUPT_SIPI) {
kvm_cpu_synchronize_state(env);
do_cpu_sipi(env);
@@ -1522,7 +1523,6 @@ static int kvm_handle_halt(CPUState *env)
(env->eflags & IF_MASK)) &&
!(env->interrupt_request & CPU_INTERRUPT_NMI)) {
env->halted = 1;
- env->exception_index = EXCP_HLT;
return 0;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 29/37] kvm: Separate TCG from KVM cpu execution
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Mixing up TCG bits with KVM already led to problems around eflags
emulation on x86. Moreover, quite some code that TCG requires on cpu
enty/exit is useless for KVM. So dispatch between tcg_cpu_exec and
kvm_cpu_exec as early as possible.
The core logic of cpu_halted from cpu_exec is added to
kvm_arch_process_irqchip_events. Moving away from cpu_exec makes
exception_index meaningless for KVM, we can simply pass the exit reason
directly (only "EXCP_DEBUG vs. rest" is relevant).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-exec.c | 19 ++++++-------------
cpus.c | 10 +++++-----
kvm-all.c | 19 +++++++++----------
target-i386/kvm.c | 6 +++---
4 files changed, 23 insertions(+), 31 deletions(-)
diff --git a/cpu-exec.c b/cpu-exec.c
index 9c0b10d..b03b3a7 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -226,13 +226,11 @@ int cpu_exec(CPUState *env1)
}
#if defined(TARGET_I386)
- if (!kvm_enabled()) {
- /* put eflags in CPU temporary format */
- CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- DF = 1 - (2 * ((env->eflags >> 10) & 1));
- CC_OP = CC_OP_EFLAGS;
- env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- }
+ /* put eflags in CPU temporary format */
+ CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+ DF = 1 - (2 * ((env->eflags >> 10) & 1));
+ CC_OP = CC_OP_EFLAGS;
+ env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
#elif defined(TARGET_SPARC)
#elif defined(TARGET_M68K)
env->cc_op = CC_OP_FLAGS;
@@ -257,7 +255,7 @@ int cpu_exec(CPUState *env1)
if (setjmp(env->jmp_env) == 0) {
#if defined(__sparc__) && !defined(CONFIG_SOLARIS)
#undef env
- env = cpu_single_env;
+ env = cpu_single_env;
#define env cpu_single_env
#endif
/* if an exception is pending, we execute it here */
@@ -316,11 +314,6 @@ int cpu_exec(CPUState *env1)
}
}
- if (kvm_enabled()) {
- kvm_cpu_exec(env);
- longjmp(env->jmp_env, 1);
- }
-
next_tb = 0; /* force lookup of first TB */
for(;;) {
interrupt_request = env->interrupt_request;
diff --git a/cpus.c b/cpus.c
index c7e86c2..468544c 100644
--- a/cpus.c
+++ b/cpus.c
@@ -800,8 +800,6 @@ static void qemu_kvm_wait_io_event(CPUState *env)
qemu_wait_io_event_common(env);
}
-static int qemu_cpu_exec(CPUState *env);
-
static void *qemu_kvm_cpu_thread_fn(void *arg)
{
CPUState *env = arg;
@@ -829,7 +827,7 @@ static void *qemu_kvm_cpu_thread_fn(void *arg)
while (1) {
if (cpu_can_run(env)) {
- r = qemu_cpu_exec(env);
+ r = kvm_cpu_exec(env);
if (r == EXCP_DEBUG) {
cpu_handle_debug_exception(env);
}
@@ -1040,7 +1038,7 @@ void vm_stop(int reason)
#endif
-static int qemu_cpu_exec(CPUState *env)
+static int tcg_cpu_exec(CPUState *env)
{
int ret;
#ifdef CONFIG_PROFILER
@@ -1095,9 +1093,11 @@ bool cpu_exec_all(void)
break;
}
if (cpu_can_run(env)) {
- r = qemu_cpu_exec(env);
if (kvm_enabled()) {
+ r = kvm_cpu_exec(env);
qemu_kvm_eat_signals(env);
+ } else {
+ r = tcg_cpu_exec(env);
}
if (r == EXCP_DEBUG) {
cpu_handle_debug_exception(env);
diff --git a/kvm-all.c b/kvm-all.c
index 19cf188..802c6b8 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -895,10 +895,11 @@ int kvm_cpu_exec(CPUState *env)
if (kvm_arch_process_irqchip_events(env)) {
env->exit_request = 0;
- env->exception_index = EXCP_HLT;
- return 0;
+ return EXCP_HLT;
}
+ cpu_single_env = env;
+
do {
if (env->kvm_vcpu_dirty) {
kvm_arch_put_registers(env, KVM_PUT_RUNTIME_STATE);
@@ -927,7 +928,6 @@ int kvm_cpu_exec(CPUState *env)
kvm_flush_coalesced_mmio_buffer();
if (ret == -EINTR || ret == -EAGAIN) {
- cpu_exit(env);
DPRINTF("io window exit\n");
ret = 0;
break;
@@ -978,8 +978,8 @@ int kvm_cpu_exec(CPUState *env)
DPRINTF("kvm_exit_debug\n");
#ifdef KVM_CAP_SET_GUEST_DEBUG
if (kvm_arch_debug(&run->debug.arch)) {
- env->exception_index = EXCP_DEBUG;
- return 0;
+ ret = EXCP_DEBUG;
+ goto out;
}
/* re-enter, this exception was guest-internal */
ret = 1;
@@ -995,13 +995,12 @@ int kvm_cpu_exec(CPUState *env)
if (ret < 0) {
cpu_dump_state(env, stderr, fprintf, CPU_DUMP_CODE);
vm_stop(VMSTOP_PANIC);
- env->exit_request = 1;
- }
- if (env->exit_request) {
- env->exit_request = 0;
- env->exception_index = EXCP_INTERRUPT;
}
+ ret = EXCP_INTERRUPT;
+out:
+ env->exit_request = 0;
+ cpu_single_env = NULL;
return ret;
}
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index ba183c4..377a0a3 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1502,12 +1502,13 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
int kvm_arch_process_irqchip_events(CPUState *env)
{
+ if (env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI)) {
+ env->halted = 0;
+ }
if (env->interrupt_request & CPU_INTERRUPT_INIT) {
kvm_cpu_synchronize_state(env);
do_cpu_init(env);
- env->exception_index = EXCP_HALTED;
}
-
if (env->interrupt_request & CPU_INTERRUPT_SIPI) {
kvm_cpu_synchronize_state(env);
do_cpu_sipi(env);
@@ -1522,7 +1523,6 @@ static int kvm_handle_halt(CPUState *env)
(env->eflags & IF_MASK)) &&
!(env->interrupt_request & CPU_INTERRUPT_NMI)) {
env->halted = 1;
- env->exception_index = EXCP_HLT;
return 0;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 30/37] kvm: x86: Prepare VCPU loop for in-kernel irqchip
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:22 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Effectively no functional change yet as kvm_irqchip_in_kernel still only
returns 0, but this patch will allow qemu-kvm to adopt the VCPU loop of
upsteam KVM.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/kvm.c | 69 +++++++++++++++++++++++++++++-----------------------
1 files changed, 38 insertions(+), 31 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 377a0a3..f02f478 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1442,11 +1442,6 @@ int kvm_arch_get_registers(CPUState *env)
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
- /* Force the VCPU out of its inner loop to process the INIT request */
- if (env->interrupt_request & CPU_INTERRUPT_INIT) {
- env->exit_request = 1;
- }
-
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
@@ -1454,35 +1449,43 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
kvm_vcpu_ioctl(env, KVM_NMI);
}
- /* Try to inject an interrupt if the guest can accept it */
- if (run->ready_for_interrupt_injection &&
- (env->interrupt_request & CPU_INTERRUPT_HARD) &&
- (env->eflags & IF_MASK)) {
- int irq;
-
- env->interrupt_request &= ~CPU_INTERRUPT_HARD;
- irq = cpu_get_pic_interrupt(env);
- if (irq >= 0) {
- struct kvm_interrupt intr;
- intr.irq = irq;
- /* FIXME: errors */
- DPRINTF("injected interrupt %d\n", irq);
- kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ if (!kvm_irqchip_in_kernel()) {
+ /* Force the VCPU out of its inner loop to process the INIT request */
+ if (env->interrupt_request & CPU_INTERRUPT_INIT) {
+ env->exit_request = 1;
}
- }
- /* If we have an interrupt but the guest is not ready to receive an
- * interrupt, request an interrupt window exit. This will
- * cause a return to userspace as soon as the guest is ready to
- * receive interrupts. */
- if ((env->interrupt_request & CPU_INTERRUPT_HARD)) {
- run->request_interrupt_window = 1;
- } else {
- run->request_interrupt_window = 0;
- }
+ /* Try to inject an interrupt if the guest can accept it */
+ if (run->ready_for_interrupt_injection &&
+ (env->interrupt_request & CPU_INTERRUPT_HARD) &&
+ (env->eflags & IF_MASK)) {
+ int irq;
+
+ env->interrupt_request &= ~CPU_INTERRUPT_HARD;
+ irq = cpu_get_pic_interrupt(env);
+ if (irq >= 0) {
+ struct kvm_interrupt intr;
+
+ intr.irq = irq;
+ /* FIXME: errors */
+ DPRINTF("injected interrupt %d\n", irq);
+ kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ }
+ }
- DPRINTF("setting tpr\n");
- run->cr8 = cpu_get_apic_tpr(env->apic_state);
+ /* If we have an interrupt but the guest is not ready to receive an
+ * interrupt, request an interrupt window exit. This will
+ * cause a return to userspace as soon as the guest is ready to
+ * receive interrupts. */
+ if ((env->interrupt_request & CPU_INTERRUPT_HARD)) {
+ run->request_interrupt_window = 1;
+ } else {
+ run->request_interrupt_window = 0;
+ }
+
+ DPRINTF("setting tpr\n");
+ run->cr8 = cpu_get_apic_tpr(env->apic_state);
+ }
return 0;
}
@@ -1502,6 +1505,10 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
int kvm_arch_process_irqchip_events(CPUState *env)
{
+ if (kvm_irqchip_in_kernel()) {
+ return 0;
+ }
+
if (env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI)) {
env->halted = 0;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 30/37] kvm: x86: Prepare VCPU loop for in-kernel irqchip
@ 2011-02-14 15:22 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:22 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Effectively no functional change yet as kvm_irqchip_in_kernel still only
returns 0, but this patch will allow qemu-kvm to adopt the VCPU loop of
upsteam KVM.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/kvm.c | 69 +++++++++++++++++++++++++++++-----------------------
1 files changed, 38 insertions(+), 31 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 377a0a3..f02f478 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1442,11 +1442,6 @@ int kvm_arch_get_registers(CPUState *env)
int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
- /* Force the VCPU out of its inner loop to process the INIT request */
- if (env->interrupt_request & CPU_INTERRUPT_INIT) {
- env->exit_request = 1;
- }
-
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
@@ -1454,35 +1449,43 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
kvm_vcpu_ioctl(env, KVM_NMI);
}
- /* Try to inject an interrupt if the guest can accept it */
- if (run->ready_for_interrupt_injection &&
- (env->interrupt_request & CPU_INTERRUPT_HARD) &&
- (env->eflags & IF_MASK)) {
- int irq;
-
- env->interrupt_request &= ~CPU_INTERRUPT_HARD;
- irq = cpu_get_pic_interrupt(env);
- if (irq >= 0) {
- struct kvm_interrupt intr;
- intr.irq = irq;
- /* FIXME: errors */
- DPRINTF("injected interrupt %d\n", irq);
- kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ if (!kvm_irqchip_in_kernel()) {
+ /* Force the VCPU out of its inner loop to process the INIT request */
+ if (env->interrupt_request & CPU_INTERRUPT_INIT) {
+ env->exit_request = 1;
}
- }
- /* If we have an interrupt but the guest is not ready to receive an
- * interrupt, request an interrupt window exit. This will
- * cause a return to userspace as soon as the guest is ready to
- * receive interrupts. */
- if ((env->interrupt_request & CPU_INTERRUPT_HARD)) {
- run->request_interrupt_window = 1;
- } else {
- run->request_interrupt_window = 0;
- }
+ /* Try to inject an interrupt if the guest can accept it */
+ if (run->ready_for_interrupt_injection &&
+ (env->interrupt_request & CPU_INTERRUPT_HARD) &&
+ (env->eflags & IF_MASK)) {
+ int irq;
+
+ env->interrupt_request &= ~CPU_INTERRUPT_HARD;
+ irq = cpu_get_pic_interrupt(env);
+ if (irq >= 0) {
+ struct kvm_interrupt intr;
+
+ intr.irq = irq;
+ /* FIXME: errors */
+ DPRINTF("injected interrupt %d\n", irq);
+ kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ }
+ }
- DPRINTF("setting tpr\n");
- run->cr8 = cpu_get_apic_tpr(env->apic_state);
+ /* If we have an interrupt but the guest is not ready to receive an
+ * interrupt, request an interrupt window exit. This will
+ * cause a return to userspace as soon as the guest is ready to
+ * receive interrupts. */
+ if ((env->interrupt_request & CPU_INTERRUPT_HARD)) {
+ run->request_interrupt_window = 1;
+ } else {
+ run->request_interrupt_window = 0;
+ }
+
+ DPRINTF("setting tpr\n");
+ run->cr8 = cpu_get_apic_tpr(env->apic_state);
+ }
return 0;
}
@@ -1502,6 +1505,10 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
int kvm_arch_process_irqchip_events(CPUState *env)
{
+ if (kvm_irqchip_in_kernel()) {
+ return 0;
+ }
+
if (env->interrupt_request & (CPU_INTERRUPT_HARD | CPU_INTERRUPT_NMI)) {
env->halted = 0;
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 31/37] kvm: Drop return values from kvm_arch_pre/post_run
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Alexander Graf, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not check them, and the only arch with non-empty implementations
always returns 0 (this is also true for qemu-kvm).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm.h | 5 ++---
target-i386/kvm.c | 8 ++------
target-ppc/kvm.c | 6 ++----
target-s390x/kvm.c | 6 ++----
4 files changed, 8 insertions(+), 17 deletions(-)
diff --git a/kvm.h b/kvm.h
index b2fb5c6..7a4d550 100644
--- a/kvm.h
+++ b/kvm.h
@@ -99,12 +99,11 @@ int kvm_vcpu_ioctl(CPUState *env, int type, ...);
extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run);
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run);
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run);
int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run);
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run);
-
int kvm_arch_process_irqchip_events(CPUState *env);
int kvm_arch_get_registers(CPUState *env);
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index f02f478..8668cb3 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1440,7 +1440,7 @@ int kvm_arch_get_registers(CPUState *env)
return 0;
}
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
@@ -1486,11 +1486,9 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
DPRINTF("setting tpr\n");
run->cr8 = cpu_get_apic_tpr(env->apic_state);
}
-
- return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
if (run->if_flag) {
env->eflags |= IF_MASK;
@@ -1499,8 +1497,6 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
}
cpu_set_apic_tpr(env->apic_state, run->cr8);
cpu_set_apic_base(env->apic_state, run->apic_base);
-
- return 0;
}
int kvm_arch_process_irqchip_events(CPUState *env)
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 93ecc57..bd4012a 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -256,14 +256,12 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
-int kvm_arch_process_irqchip_events(CPUState *env)
+void kvm_arch_process_irqchip_events(CPUState *env)
{
- return 0;
}
static int kvmppc_handle_halt(CPUState *env)
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 1702c46..b349812 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -169,14 +169,12 @@ int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
return 0;
}
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
int kvm_arch_process_irqchip_events(CPUState *env)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 31/37] kvm: Drop return values from kvm_arch_pre/post_run
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm, Alexander Graf
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not check them, and the only arch with non-empty implementations
always returns 0 (this is also true for qemu-kvm).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Alexander Graf <agraf@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm.h | 5 ++---
target-i386/kvm.c | 8 ++------
target-ppc/kvm.c | 6 ++----
target-s390x/kvm.c | 6 ++----
4 files changed, 8 insertions(+), 17 deletions(-)
diff --git a/kvm.h b/kvm.h
index b2fb5c6..7a4d550 100644
--- a/kvm.h
+++ b/kvm.h
@@ -99,12 +99,11 @@ int kvm_vcpu_ioctl(CPUState *env, int type, ...);
extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run);
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run);
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run);
int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run);
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run);
-
int kvm_arch_process_irqchip_events(CPUState *env);
int kvm_arch_get_registers(CPUState *env);
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index f02f478..8668cb3 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1440,7 +1440,7 @@ int kvm_arch_get_registers(CPUState *env)
return 0;
}
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
@@ -1486,11 +1486,9 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
DPRINTF("setting tpr\n");
run->cr8 = cpu_get_apic_tpr(env->apic_state);
}
-
- return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
if (run->if_flag) {
env->eflags |= IF_MASK;
@@ -1499,8 +1497,6 @@ int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
}
cpu_set_apic_tpr(env->apic_state, run->cr8);
cpu_set_apic_base(env->apic_state, run->apic_base);
-
- return 0;
}
int kvm_arch_process_irqchip_events(CPUState *env)
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 93ecc57..bd4012a 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -256,14 +256,12 @@ int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
-int kvm_arch_process_irqchip_events(CPUState *env)
+void kvm_arch_process_irqchip_events(CPUState *env)
{
- return 0;
}
static int kvmppc_handle_halt(CPUState *env)
diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index 1702c46..b349812 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -169,14 +169,12 @@ int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp)
return 0;
}
-int kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
-int kvm_arch_post_run(CPUState *env, struct kvm_run *run)
+void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
{
- return 0;
}
int kvm_arch_process_irqchip_events(CPUState *env)
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 32/37] kvm: x86: Catch and report failing IRQ and NMI injections
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not need to abort, but the user should be notified that weird
things go on.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/kvm.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8668cb3..0aa0a41 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1442,11 +1442,17 @@ int kvm_arch_get_registers(CPUState *env)
void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
+ int ret;
+
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
DPRINTF("injected NMI\n");
- kvm_vcpu_ioctl(env, KVM_NMI);
+ ret = kvm_vcpu_ioctl(env, KVM_NMI);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
+ strerror(-ret));
+ }
}
if (!kvm_irqchip_in_kernel()) {
@@ -1467,9 +1473,13 @@ void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
struct kvm_interrupt intr;
intr.irq = irq;
- /* FIXME: errors */
DPRINTF("injected interrupt %d\n", irq);
- kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ ret = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ if (ret < 0) {
+ fprintf(stderr,
+ "KVM: injection failed, interrupt lost (%s)\n",
+ strerror(-ret));
+ }
}
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 32/37] kvm: x86: Catch and report failing IRQ and NMI injections
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
We do not need to abort, but the user should be notified that weird
things go on.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
target-i386/kvm.c | 16 +++++++++++++---
1 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 8668cb3..0aa0a41 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1442,11 +1442,17 @@ int kvm_arch_get_registers(CPUState *env)
void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
{
+ int ret;
+
/* Inject NMI */
if (env->interrupt_request & CPU_INTERRUPT_NMI) {
env->interrupt_request &= ~CPU_INTERRUPT_NMI;
DPRINTF("injected NMI\n");
- kvm_vcpu_ioctl(env, KVM_NMI);
+ ret = kvm_vcpu_ioctl(env, KVM_NMI);
+ if (ret < 0) {
+ fprintf(stderr, "KVM: injection failed, NMI lost (%s)\n",
+ strerror(-ret));
+ }
}
if (!kvm_irqchip_in_kernel()) {
@@ -1467,9 +1473,13 @@ void kvm_arch_pre_run(CPUState *env, struct kvm_run *run)
struct kvm_interrupt intr;
intr.irq = irq;
- /* FIXME: errors */
DPRINTF("injected interrupt %d\n", irq);
- kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ ret = kvm_vcpu_ioctl(env, KVM_INTERRUPT, &intr);
+ if (ret < 0) {
+ fprintf(stderr,
+ "KVM: injection failed, interrupt lost (%s)\n",
+ strerror(-ret));
+ }
}
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 33/37] kvm: Remove unneeded memory slot reservation
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Alex Williamson, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
The number of slots and the location of private ones changed several
times in KVM's early days. However, it's stable since 2.6.29 (our
required baseline), and slots 8..11 are no longer reserved since then.
So remove this unneeded restriction.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 4 ----
1 files changed, 0 insertions(+), 4 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 802c6b8..14b6c1e 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -91,10 +91,6 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
int i;
for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
- /* KVM private memory slots */
- if (i >= 8 && i < 12) {
- continue;
- }
if (s->slots[i].memory_size == 0) {
return &s->slots[i];
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 33/37] kvm: Remove unneeded memory slot reservation
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: Jan Kiszka, Alex Williamson, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
The number of slots and the location of private ones changed several
times in KVM's early days. However, it's stable since 2.6.29 (our
required baseline), and slots 8..11 are no longer reserved since then.
So remove this unneeded restriction.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 4 ----
1 files changed, 0 insertions(+), 4 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index 802c6b8..14b6c1e 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -91,10 +91,6 @@ static KVMSlot *kvm_alloc_slot(KVMState *s)
int i;
for (i = 0; i < ARRAY_SIZE(s->slots); i++) {
- /* KVM private memory slots */
- if (i >= 8 && i < 12) {
- continue;
- }
if (s->slots[i].memory_size == 0) {
return &s->slots[i];
}
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 34/37] Introduce log_start/log_stop in CPUPhysMemoryClient
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Anthony PERARD, Jan Kiszka, Marcelo Tosatti
From: Anthony PERARD <anthony.perard@citrix.com>
In order to use log_start/log_stop with Xen as well in the vga code,
this two operations have been put in CPUPhysMemoryClient.
The two new functions cpu_physical_log_start,cpu_physical_log_stop are
used in hw/vga.c and replace the kvm_log_start/stop. With this, vga does
no longer depends on kvm header.
[ Jan: rebasing and style fixlets ]
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-all.h | 6 ++++++
cpu-common.h | 4 ++++
exec.c | 30 ++++++++++++++++++++++++++++++
hw/vga.c | 31 ++++++++++++++++---------------
hw/vhost.c | 2 ++
kvm-all.c | 8 ++++++--
kvm-stub.c | 10 ----------
kvm.h | 3 ---
8 files changed, 64 insertions(+), 30 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index ffbd6a4..87b0f86 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -959,6 +959,12 @@ int cpu_physical_memory_get_dirty_tracking(void);
int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
target_phys_addr_t end_addr);
+int cpu_physical_log_start(target_phys_addr_t start_addr,
+ ram_addr_t size);
+
+int cpu_physical_log_stop(target_phys_addr_t start_addr,
+ ram_addr_t size);
+
void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
#endif /* !CONFIG_USER_ONLY */
diff --git a/cpu-common.h b/cpu-common.h
index 6d4a898..54d21d4 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -96,6 +96,10 @@ struct CPUPhysMemoryClient {
target_phys_addr_t end_addr);
int (*migration_log)(struct CPUPhysMemoryClient *client,
int enable);
+ int (*log_start)(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size);
+ int (*log_stop)(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size);
QLIST_ENTRY(CPUPhysMemoryClient) list;
};
diff --git a/exec.c b/exec.c
index 1b70dc1..d611100 100644
--- a/exec.c
+++ b/exec.c
@@ -2078,6 +2078,36 @@ int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
return ret;
}
+int cpu_physical_log_start(target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ CPUPhysMemoryClient *client;
+ QLIST_FOREACH(client, &memory_client_list, list) {
+ if (client->log_start) {
+ int r = client->log_start(client, start_addr, size);
+ if (r < 0) {
+ return r;
+ }
+ }
+ }
+ return 0;
+}
+
+int cpu_physical_log_stop(target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ CPUPhysMemoryClient *client;
+ QLIST_FOREACH(client, &memory_client_list, list) {
+ if (client->log_stop) {
+ int r = client->log_stop(client, start_addr, size);
+ if (r < 0) {
+ return r;
+ }
+ }
+ }
+ return 0;
+}
+
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
{
ram_addr_t ram_addr;
diff --git a/hw/vga.c b/hw/vga.c
index e2151a2..c22b8af 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -28,7 +28,6 @@
#include "vga_int.h"
#include "pixel_ops.h"
#include "qemu-timer.h"
-#include "kvm.h"
//#define DEBUG_VGA
//#define DEBUG_VGA_MEM
@@ -1573,34 +1572,36 @@ static void vga_sync_dirty_bitmap(VGACommonState *s)
void vga_dirty_log_start(VGACommonState *s)
{
- if (kvm_enabled() && s->map_addr)
- kvm_log_start(s->map_addr, s->map_end - s->map_addr);
+ if (s->map_addr) {
+ cpu_physical_log_start(s->map_addr, s->map_end - s->map_addr);
+ }
- if (kvm_enabled() && s->lfb_vram_mapped) {
- kvm_log_start(isa_mem_base + 0xa0000, 0x8000);
- kvm_log_start(isa_mem_base + 0xa8000, 0x8000);
+ if (s->lfb_vram_mapped) {
+ cpu_physical_log_start(isa_mem_base + 0xa0000, 0x8000);
+ cpu_physical_log_start(isa_mem_base + 0xa8000, 0x8000);
}
#ifdef CONFIG_BOCHS_VBE
- if (kvm_enabled() && s->vbe_mapped) {
- kvm_log_start(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
+ if (s->vbe_mapped) {
+ cpu_physical_log_start(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
}
#endif
}
void vga_dirty_log_stop(VGACommonState *s)
{
- if (kvm_enabled() && s->map_addr)
- kvm_log_stop(s->map_addr, s->map_end - s->map_addr);
+ if (s->map_addr) {
+ cpu_physical_log_stop(s->map_addr, s->map_end - s->map_addr);
+ }
- if (kvm_enabled() && s->lfb_vram_mapped) {
- kvm_log_stop(isa_mem_base + 0xa0000, 0x8000);
- kvm_log_stop(isa_mem_base + 0xa8000, 0x8000);
+ if (s->lfb_vram_mapped) {
+ cpu_physical_log_stop(isa_mem_base + 0xa0000, 0x8000);
+ cpu_physical_log_stop(isa_mem_base + 0xa8000, 0x8000);
}
#ifdef CONFIG_BOCHS_VBE
- if (kvm_enabled() && s->vbe_mapped) {
- kvm_log_stop(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
+ if (s->vbe_mapped) {
+ cpu_physical_log_stop(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
}
#endif
}
diff --git a/hw/vhost.c b/hw/vhost.c
index 38cc3b3..0ca3507 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -607,6 +607,8 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
hdev->client.set_memory = vhost_client_set_memory;
hdev->client.sync_dirty_bitmap = vhost_client_sync_dirty_bitmap;
hdev->client.migration_log = vhost_client_migration_log;
+ hdev->client.log_start = NULL;
+ hdev->client.log_stop = NULL;
hdev->mem = qemu_mallocz(offsetof(struct vhost_memory, regions));
hdev->log = NULL;
hdev->log_size = 0;
diff --git a/kvm-all.c b/kvm-all.c
index 14b6c1e..ecac0b3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -274,13 +274,15 @@ static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr,
return kvm_set_user_memory_region(s, mem);
}
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
+static int kvm_log_start(CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size)
{
return kvm_dirty_pages_log_change(phys_addr, size, KVM_MEM_LOG_DIRTY_PAGES,
KVM_MEM_LOG_DIRTY_PAGES);
}
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
+static int kvm_log_stop(CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size)
{
return kvm_dirty_pages_log_change(phys_addr, size, 0,
KVM_MEM_LOG_DIRTY_PAGES);
@@ -644,6 +646,8 @@ static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
.set_memory = kvm_client_set_memory,
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap,
.migration_log = kvm_client_migration_log,
+ .log_start = kvm_log_start,
+ .log_stop = kvm_log_stop,
};
int kvm_init(void)
diff --git a/kvm-stub.c b/kvm-stub.c
index d6b6c8e..30f6ec3 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -33,16 +33,6 @@ int kvm_init_vcpu(CPUState *env)
return -ENOSYS;
}
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
-{
- return -ENOSYS;
-}
-
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
-{
- return -ENOSYS;
-}
-
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
{
return -ENOSYS;
diff --git a/kvm.h b/kvm.h
index 7a4d550..4caa6ec 100644
--- a/kvm.h
+++ b/kvm.h
@@ -58,9 +58,6 @@ int kvm_init_vcpu(CPUState *env);
int kvm_cpu_exec(CPUState *env);
#if !defined(CONFIG_USER_ONLY)
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size);
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size);
-
void kvm_setup_guest_memory(void *start, size_t size);
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 34/37] Introduce log_start/log_stop in CPUPhysMemoryClient
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: Anthony PERARD, Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Anthony PERARD <anthony.perard@citrix.com>
In order to use log_start/log_stop with Xen as well in the vga code,
this two operations have been put in CPUPhysMemoryClient.
The two new functions cpu_physical_log_start,cpu_physical_log_stop are
used in hw/vga.c and replace the kvm_log_start/stop. With this, vga does
no longer depends on kvm header.
[ Jan: rebasing and style fixlets ]
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
cpu-all.h | 6 ++++++
cpu-common.h | 4 ++++
exec.c | 30 ++++++++++++++++++++++++++++++
hw/vga.c | 31 ++++++++++++++++---------------
hw/vhost.c | 2 ++
kvm-all.c | 8 ++++++--
kvm-stub.c | 10 ----------
kvm.h | 3 ---
8 files changed, 64 insertions(+), 30 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index ffbd6a4..87b0f86 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -959,6 +959,12 @@ int cpu_physical_memory_get_dirty_tracking(void);
int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
target_phys_addr_t end_addr);
+int cpu_physical_log_start(target_phys_addr_t start_addr,
+ ram_addr_t size);
+
+int cpu_physical_log_stop(target_phys_addr_t start_addr,
+ ram_addr_t size);
+
void dump_exec_info(FILE *f, fprintf_function cpu_fprintf);
#endif /* !CONFIG_USER_ONLY */
diff --git a/cpu-common.h b/cpu-common.h
index 6d4a898..54d21d4 100644
--- a/cpu-common.h
+++ b/cpu-common.h
@@ -96,6 +96,10 @@ struct CPUPhysMemoryClient {
target_phys_addr_t end_addr);
int (*migration_log)(struct CPUPhysMemoryClient *client,
int enable);
+ int (*log_start)(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size);
+ int (*log_stop)(struct CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size);
QLIST_ENTRY(CPUPhysMemoryClient) list;
};
diff --git a/exec.c b/exec.c
index 1b70dc1..d611100 100644
--- a/exec.c
+++ b/exec.c
@@ -2078,6 +2078,36 @@ int cpu_physical_sync_dirty_bitmap(target_phys_addr_t start_addr,
return ret;
}
+int cpu_physical_log_start(target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ CPUPhysMemoryClient *client;
+ QLIST_FOREACH(client, &memory_client_list, list) {
+ if (client->log_start) {
+ int r = client->log_start(client, start_addr, size);
+ if (r < 0) {
+ return r;
+ }
+ }
+ }
+ return 0;
+}
+
+int cpu_physical_log_stop(target_phys_addr_t start_addr,
+ ram_addr_t size)
+{
+ CPUPhysMemoryClient *client;
+ QLIST_FOREACH(client, &memory_client_list, list) {
+ if (client->log_stop) {
+ int r = client->log_stop(client, start_addr, size);
+ if (r < 0) {
+ return r;
+ }
+ }
+ }
+ return 0;
+}
+
static inline void tlb_update_dirty(CPUTLBEntry *tlb_entry)
{
ram_addr_t ram_addr;
diff --git a/hw/vga.c b/hw/vga.c
index e2151a2..c22b8af 100644
--- a/hw/vga.c
+++ b/hw/vga.c
@@ -28,7 +28,6 @@
#include "vga_int.h"
#include "pixel_ops.h"
#include "qemu-timer.h"
-#include "kvm.h"
//#define DEBUG_VGA
//#define DEBUG_VGA_MEM
@@ -1573,34 +1572,36 @@ static void vga_sync_dirty_bitmap(VGACommonState *s)
void vga_dirty_log_start(VGACommonState *s)
{
- if (kvm_enabled() && s->map_addr)
- kvm_log_start(s->map_addr, s->map_end - s->map_addr);
+ if (s->map_addr) {
+ cpu_physical_log_start(s->map_addr, s->map_end - s->map_addr);
+ }
- if (kvm_enabled() && s->lfb_vram_mapped) {
- kvm_log_start(isa_mem_base + 0xa0000, 0x8000);
- kvm_log_start(isa_mem_base + 0xa8000, 0x8000);
+ if (s->lfb_vram_mapped) {
+ cpu_physical_log_start(isa_mem_base + 0xa0000, 0x8000);
+ cpu_physical_log_start(isa_mem_base + 0xa8000, 0x8000);
}
#ifdef CONFIG_BOCHS_VBE
- if (kvm_enabled() && s->vbe_mapped) {
- kvm_log_start(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
+ if (s->vbe_mapped) {
+ cpu_physical_log_start(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
}
#endif
}
void vga_dirty_log_stop(VGACommonState *s)
{
- if (kvm_enabled() && s->map_addr)
- kvm_log_stop(s->map_addr, s->map_end - s->map_addr);
+ if (s->map_addr) {
+ cpu_physical_log_stop(s->map_addr, s->map_end - s->map_addr);
+ }
- if (kvm_enabled() && s->lfb_vram_mapped) {
- kvm_log_stop(isa_mem_base + 0xa0000, 0x8000);
- kvm_log_stop(isa_mem_base + 0xa8000, 0x8000);
+ if (s->lfb_vram_mapped) {
+ cpu_physical_log_stop(isa_mem_base + 0xa0000, 0x8000);
+ cpu_physical_log_stop(isa_mem_base + 0xa8000, 0x8000);
}
#ifdef CONFIG_BOCHS_VBE
- if (kvm_enabled() && s->vbe_mapped) {
- kvm_log_stop(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
+ if (s->vbe_mapped) {
+ cpu_physical_log_stop(VBE_DISPI_LFB_PHYSICAL_ADDRESS, s->vram_size);
}
#endif
}
diff --git a/hw/vhost.c b/hw/vhost.c
index 38cc3b3..0ca3507 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -607,6 +607,8 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
hdev->client.set_memory = vhost_client_set_memory;
hdev->client.sync_dirty_bitmap = vhost_client_sync_dirty_bitmap;
hdev->client.migration_log = vhost_client_migration_log;
+ hdev->client.log_start = NULL;
+ hdev->client.log_stop = NULL;
hdev->mem = qemu_mallocz(offsetof(struct vhost_memory, regions));
hdev->log = NULL;
hdev->log_size = 0;
diff --git a/kvm-all.c b/kvm-all.c
index 14b6c1e..ecac0b3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -274,13 +274,15 @@ static int kvm_dirty_pages_log_change(target_phys_addr_t phys_addr,
return kvm_set_user_memory_region(s, mem);
}
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
+static int kvm_log_start(CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size)
{
return kvm_dirty_pages_log_change(phys_addr, size, KVM_MEM_LOG_DIRTY_PAGES,
KVM_MEM_LOG_DIRTY_PAGES);
}
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
+static int kvm_log_stop(CPUPhysMemoryClient *client,
+ target_phys_addr_t phys_addr, ram_addr_t size)
{
return kvm_dirty_pages_log_change(phys_addr, size, 0,
KVM_MEM_LOG_DIRTY_PAGES);
@@ -644,6 +646,8 @@ static CPUPhysMemoryClient kvm_cpu_phys_memory_client = {
.set_memory = kvm_client_set_memory,
.sync_dirty_bitmap = kvm_client_sync_dirty_bitmap,
.migration_log = kvm_client_migration_log,
+ .log_start = kvm_log_start,
+ .log_stop = kvm_log_stop,
};
int kvm_init(void)
diff --git a/kvm-stub.c b/kvm-stub.c
index d6b6c8e..30f6ec3 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -33,16 +33,6 @@ int kvm_init_vcpu(CPUState *env)
return -ENOSYS;
}
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size)
-{
- return -ENOSYS;
-}
-
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size)
-{
- return -ENOSYS;
-}
-
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size)
{
return -ENOSYS;
diff --git a/kvm.h b/kvm.h
index 7a4d550..4caa6ec 100644
--- a/kvm.h
+++ b/kvm.h
@@ -58,9 +58,6 @@ int kvm_init_vcpu(CPUState *env);
int kvm_cpu_exec(CPUState *env);
#if !defined(CONFIG_USER_ONLY)
-int kvm_log_start(target_phys_addr_t phys_addr, ram_addr_t size);
-int kvm_log_stop(target_phys_addr_t phys_addr, ram_addr_t size);
-
void kvm_setup_guest_memory(void *start, size_t size);
int kvm_coalesce_mmio_region(target_phys_addr_t start, ram_addr_t size);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 35/37] cirrus: Remove obsolete kvm.h include
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
hw/cirrus_vga.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index 5f45b5d..2724f7b 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -31,7 +31,6 @@
#include "pci.h"
#include "console.h"
#include "vga_int.h"
-#include "kvm.h"
#include "loader.h"
/*
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [Qemu-devel] [PATCH 35/37] cirrus: Remove obsolete kvm.h include
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
hw/cirrus_vga.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
index 5f45b5d..2724f7b 100644
--- a/hw/cirrus_vga.c
+++ b/hw/cirrus_vga.c
@@ -31,7 +31,6 @@
#include "pci.h"
#include "console.h"
#include "vga_int.h"
-#include "kvm.h"
#include "loader.h"
/*
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 36/37] kvm: Make kvm_state globally available
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: qemu-devel, kvm, Jan Kiszka, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
KVM-assisted devices need access to it but we have no clean channel to
distribute a reference. As a workaround until there is a better
solution, export kvm_state for global use, though use should remain
restricted to the mentioned scenario.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 2 +-
kvm.h | 1 +
2 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index ecac0b3..e6a7de4 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -78,7 +78,7 @@ struct KVMState
int many_ioeventfds;
};
-static KVMState *kvm_state;
+KVMState *kvm_state;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
diff --git a/kvm.h b/kvm.h
index 4caa6ec..59b2c29 100644
--- a/kvm.h
+++ b/kvm.h
@@ -85,6 +85,7 @@ int kvm_on_sigbus(int code, void *addr);
struct KVMState;
typedef struct KVMState KVMState;
+extern KVMState *kvm_state;
int kvm_ioctl(KVMState *s, int type, ...);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 36/37] kvm: Make kvm_state globally available
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori; +Cc: Jan Kiszka, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
KVM-assisted devices need access to it but we have no clean channel to
distribute a reference. As a workaround until there is a better
solution, export kvm_state for global use, though use should remain
restricted to the mentioned scenario.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
kvm-all.c | 2 +-
kvm.h | 1 +
2 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/kvm-all.c b/kvm-all.c
index ecac0b3..e6a7de4 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -78,7 +78,7 @@ struct KVMState
int many_ioeventfds;
};
-static KVMState *kvm_state;
+KVMState *kvm_state;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
diff --git a/kvm.h b/kvm.h
index 4caa6ec..59b2c29 100644
--- a/kvm.h
+++ b/kvm.h
@@ -85,6 +85,7 @@ int kvm_on_sigbus(int code, void *addr);
struct KVMState;
typedef struct KVMState KVMState;
+extern KVMState *kvm_state;
int kvm_ioctl(KVMState *s, int type, ...);
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* [PATCH 37/37] kvm: x86: Introduce kvmclock device to save/restore its state
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
@ 2011-02-14 15:23 ` Marcelo Tosatti
-1 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: qemu-devel, kvm, Jan Kiszka, Glauber Costa, Marcelo Tosatti
From: Jan Kiszka <jan.kiszka@siemens.com>
If kvmclock is used, which implies the kernel supports it, register a
kvmclock device with the sysbus. Its main purpose is to save and restore
the kernel state on migration, but this will also allow to visualize it
one day.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Glauber Costa <glommer@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
Makefile.target | 4 +-
hw/kvmclock.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/kvmclock.h | 14 ++++++
hw/pc_piix.c | 32 +++++++++++---
4 files changed, 166 insertions(+), 9 deletions(-)
create mode 100644 hw/kvmclock.c
create mode 100644 hw/kvmclock.h
diff --git a/Makefile.target b/Makefile.target
index a6c30dd..5a0fd40 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -37,7 +37,7 @@ ifndef CONFIG_HAIKU
LIBS+=-lm
endif
-kvm.o kvm-all.o vhost.o vhost_net.o: QEMU_CFLAGS+=$(KVM_CFLAGS)
+kvm.o kvm-all.o vhost.o vhost_net.o kvmclock.o: QEMU_CFLAGS+=$(KVM_CFLAGS)
config-target.h: config-target.h-timestamp
config-target.h-timestamp: config-target.mak
@@ -218,7 +218,7 @@ obj-i386-y += cirrus_vga.o apic.o ioapic.o piix_pci.o
obj-i386-y += vmport.o applesmc.o
obj-i386-y += device-hotplug.o pci-hotplug.o smbios.o wdt_ib700.o
obj-i386-y += debugcon.o multiboot.o
-obj-i386-y += pc_piix.o
+obj-i386-y += pc_piix.o kvmclock.o
obj-i386-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
# shared objects
diff --git a/hw/kvmclock.c b/hw/kvmclock.c
new file mode 100644
index 0000000..b6ceddf
--- /dev/null
+++ b/hw/kvmclock.c
@@ -0,0 +1,125 @@
+/*
+ * QEMU KVM support, paravirtual clock device
+ *
+ * Copyright (C) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "sysbus.h"
+#include "kvm.h"
+#include "kvmclock.h"
+
+#if defined(CONFIG_KVM_PARA) && defined(KVM_CAP_ADJUST_CLOCK)
+
+#include <linux/kvm.h>
+#include <linux/kvm_para.h>
+
+typedef struct KVMClockState {
+ SysBusDevice busdev;
+ uint64_t clock;
+ bool clock_valid;
+} KVMClockState;
+
+static void kvmclock_pre_save(void *opaque)
+{
+ KVMClockState *s = opaque;
+ struct kvm_clock_data data;
+ int ret;
+
+ if (s->clock_valid) {
+ return;
+ }
+ ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));
+ data.clock = 0;
+ }
+ s->clock = data.clock;
+ /*
+ * If the VM is stopped, declare the clock state valid to avoid re-reading
+ * it on next vmsave (which would return a different value). Will be reset
+ * when the VM is continued.
+ */
+ s->clock_valid = !vm_running;
+}
+
+static int kvmclock_post_load(void *opaque, int version_id)
+{
+ KVMClockState *s = opaque;
+ struct kvm_clock_data data;
+
+ data.clock = s->clock;
+ data.flags = 0;
+ return kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, &data);
+}
+
+static void kvmclock_vm_state_change(void *opaque, int running, int reason)
+{
+ KVMClockState *s = opaque;
+
+ if (running) {
+ s->clock_valid = false;
+ }
+}
+
+static int kvmclock_init(SysBusDevice *dev)
+{
+ KVMClockState *s = FROM_SYSBUS(KVMClockState, dev);
+
+ qemu_add_vm_change_state_handler(kvmclock_vm_state_change, s);
+ return 0;
+}
+
+static const VMStateDescription kvmclock_vmsd = {
+ .name = "kvmclock",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .pre_save = kvmclock_pre_save,
+ .post_load = kvmclock_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(clock, KVMClockState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static SysBusDeviceInfo kvmclock_info = {
+ .qdev.name = "kvmclock",
+ .qdev.size = sizeof(KVMClockState),
+ .qdev.vmsd = &kvmclock_vmsd,
+ .qdev.no_user = 1,
+ .init = kvmclock_init,
+};
+
+/* Note: Must be called after VCPU initialization. */
+void kvmclock_create(void)
+{
+ if (kvm_enabled() &&
+ first_cpu->cpuid_kvm_features & (1ULL << KVM_FEATURE_CLOCKSOURCE)) {
+ sysbus_create_simple("kvmclock", -1, NULL);
+ }
+}
+
+static void kvmclock_register_device(void)
+{
+ if (kvm_enabled()) {
+ sysbus_register_withprop(&kvmclock_info);
+ }
+}
+
+device_init(kvmclock_register_device);
+
+#else /* !(CONFIG_KVM_PARA && KVM_CAP_ADJUST_CLOCK) */
+
+void kvmclock_create(void)
+{
+}
+#endif /* !(CONFIG_KVM_PARA && KVM_CAP_ADJUST_CLOCK) */
diff --git a/hw/kvmclock.h b/hw/kvmclock.h
new file mode 100644
index 0000000..7a83cbe
--- /dev/null
+++ b/hw/kvmclock.h
@@ -0,0 +1,14 @@
+/*
+ * QEMU KVM support, paravirtual clock device
+ *
+ * Copyright (C) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+void kvmclock_create(void);
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index d0bd0cd..2918454 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -32,6 +32,7 @@
#include "boards.h"
#include "ide.h"
#include "kvm.h"
+#include "kvmclock.h"
#include "sysemu.h"
#include "sysbus.h"
#include "arch_init.h"
@@ -66,7 +67,8 @@ static void pc_init1(ram_addr_t ram_size,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model,
- int pci_enabled)
+ int pci_enabled,
+ int kvmclock_enabled)
{
int i;
ram_addr_t below_4g_mem_size, above_4g_mem_size;
@@ -86,6 +88,10 @@ static void pc_init1(ram_addr_t ram_size,
pc_cpus_init(cpu_model);
+ if (kvmclock_enabled) {
+ kvmclock_create();
+ }
+
/* allocate ram and load rom/bios */
pc_memory_init(ram_size, kernel_filename, kernel_cmdline, initrd_filename,
&below_4g_mem_size, &above_4g_mem_size);
@@ -193,7 +199,19 @@ static void pc_init_pci(ram_addr_t ram_size,
{
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
- initrd_filename, cpu_model, 1);
+ initrd_filename, cpu_model, 1, 1);
+}
+
+static void pc_init_pci_no_kvmclock(ram_addr_t ram_size,
+ const char *boot_device,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename,
+ const char *cpu_model)
+{
+ pc_init1(ram_size, boot_device,
+ kernel_filename, kernel_cmdline,
+ initrd_filename, cpu_model, 1, 0);
}
static void pc_init_isa(ram_addr_t ram_size,
@@ -207,7 +225,7 @@ static void pc_init_isa(ram_addr_t ram_size,
cpu_model = "486";
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
- initrd_filename, cpu_model, 0);
+ initrd_filename, cpu_model, 0, 1);
}
static QEMUMachine pc_machine = {
@@ -222,7 +240,7 @@ static QEMUMachine pc_machine = {
static QEMUMachine pc_machine_v0_13 = {
.name = "pc-0.13",
.desc = "Standard PC",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -249,7 +267,7 @@ static QEMUMachine pc_machine_v0_13 = {
static QEMUMachine pc_machine_v0_12 = {
.name = "pc-0.12",
.desc = "Standard PC",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -280,7 +298,7 @@ static QEMUMachine pc_machine_v0_12 = {
static QEMUMachine pc_machine_v0_11 = {
.name = "pc-0.11",
.desc = "Standard PC, qemu 0.11",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -319,7 +337,7 @@ static QEMUMachine pc_machine_v0_11 = {
static QEMUMachine pc_machine_v0_10 = {
.name = "pc-0.10",
.desc = "Standard PC, qemu 0.10",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread* [Qemu-devel] [PATCH 37/37] kvm: x86: Introduce kvmclock device to save/restore its state
@ 2011-02-14 15:23 ` Marcelo Tosatti
0 siblings, 0 replies; 85+ messages in thread
From: Marcelo Tosatti @ 2011-02-14 15:23 UTC (permalink / raw)
To: Anthony Liguori
Cc: Jan Kiszka, Glauber Costa, Marcelo Tosatti, qemu-devel, kvm
From: Jan Kiszka <jan.kiszka@siemens.com>
If kvmclock is used, which implies the kernel supports it, register a
kvmclock device with the sysbus. Its main purpose is to save and restore
the kernel state on migration, but this will also allow to visualize it
one day.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
CC: Glauber Costa <glommer@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
Makefile.target | 4 +-
hw/kvmclock.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
hw/kvmclock.h | 14 ++++++
hw/pc_piix.c | 32 +++++++++++---
4 files changed, 166 insertions(+), 9 deletions(-)
create mode 100644 hw/kvmclock.c
create mode 100644 hw/kvmclock.h
diff --git a/Makefile.target b/Makefile.target
index a6c30dd..5a0fd40 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -37,7 +37,7 @@ ifndef CONFIG_HAIKU
LIBS+=-lm
endif
-kvm.o kvm-all.o vhost.o vhost_net.o: QEMU_CFLAGS+=$(KVM_CFLAGS)
+kvm.o kvm-all.o vhost.o vhost_net.o kvmclock.o: QEMU_CFLAGS+=$(KVM_CFLAGS)
config-target.h: config-target.h-timestamp
config-target.h-timestamp: config-target.mak
@@ -218,7 +218,7 @@ obj-i386-y += cirrus_vga.o apic.o ioapic.o piix_pci.o
obj-i386-y += vmport.o applesmc.o
obj-i386-y += device-hotplug.o pci-hotplug.o smbios.o wdt_ib700.o
obj-i386-y += debugcon.o multiboot.o
-obj-i386-y += pc_piix.o
+obj-i386-y += pc_piix.o kvmclock.o
obj-i386-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
# shared objects
diff --git a/hw/kvmclock.c b/hw/kvmclock.c
new file mode 100644
index 0000000..b6ceddf
--- /dev/null
+++ b/hw/kvmclock.c
@@ -0,0 +1,125 @@
+/*
+ * QEMU KVM support, paravirtual clock device
+ *
+ * Copyright (C) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "sysbus.h"
+#include "kvm.h"
+#include "kvmclock.h"
+
+#if defined(CONFIG_KVM_PARA) && defined(KVM_CAP_ADJUST_CLOCK)
+
+#include <linux/kvm.h>
+#include <linux/kvm_para.h>
+
+typedef struct KVMClockState {
+ SysBusDevice busdev;
+ uint64_t clock;
+ bool clock_valid;
+} KVMClockState;
+
+static void kvmclock_pre_save(void *opaque)
+{
+ KVMClockState *s = opaque;
+ struct kvm_clock_data data;
+ int ret;
+
+ if (s->clock_valid) {
+ return;
+ }
+ ret = kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, &data);
+ if (ret < 0) {
+ fprintf(stderr, "KVM_GET_CLOCK failed: %s\n", strerror(ret));
+ data.clock = 0;
+ }
+ s->clock = data.clock;
+ /*
+ * If the VM is stopped, declare the clock state valid to avoid re-reading
+ * it on next vmsave (which would return a different value). Will be reset
+ * when the VM is continued.
+ */
+ s->clock_valid = !vm_running;
+}
+
+static int kvmclock_post_load(void *opaque, int version_id)
+{
+ KVMClockState *s = opaque;
+ struct kvm_clock_data data;
+
+ data.clock = s->clock;
+ data.flags = 0;
+ return kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, &data);
+}
+
+static void kvmclock_vm_state_change(void *opaque, int running, int reason)
+{
+ KVMClockState *s = opaque;
+
+ if (running) {
+ s->clock_valid = false;
+ }
+}
+
+static int kvmclock_init(SysBusDevice *dev)
+{
+ KVMClockState *s = FROM_SYSBUS(KVMClockState, dev);
+
+ qemu_add_vm_change_state_handler(kvmclock_vm_state_change, s);
+ return 0;
+}
+
+static const VMStateDescription kvmclock_vmsd = {
+ .name = "kvmclock",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .pre_save = kvmclock_pre_save,
+ .post_load = kvmclock_post_load,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT64(clock, KVMClockState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static SysBusDeviceInfo kvmclock_info = {
+ .qdev.name = "kvmclock",
+ .qdev.size = sizeof(KVMClockState),
+ .qdev.vmsd = &kvmclock_vmsd,
+ .qdev.no_user = 1,
+ .init = kvmclock_init,
+};
+
+/* Note: Must be called after VCPU initialization. */
+void kvmclock_create(void)
+{
+ if (kvm_enabled() &&
+ first_cpu->cpuid_kvm_features & (1ULL << KVM_FEATURE_CLOCKSOURCE)) {
+ sysbus_create_simple("kvmclock", -1, NULL);
+ }
+}
+
+static void kvmclock_register_device(void)
+{
+ if (kvm_enabled()) {
+ sysbus_register_withprop(&kvmclock_info);
+ }
+}
+
+device_init(kvmclock_register_device);
+
+#else /* !(CONFIG_KVM_PARA && KVM_CAP_ADJUST_CLOCK) */
+
+void kvmclock_create(void)
+{
+}
+#endif /* !(CONFIG_KVM_PARA && KVM_CAP_ADJUST_CLOCK) */
diff --git a/hw/kvmclock.h b/hw/kvmclock.h
new file mode 100644
index 0000000..7a83cbe
--- /dev/null
+++ b/hw/kvmclock.h
@@ -0,0 +1,14 @@
+/*
+ * QEMU KVM support, paravirtual clock device
+ *
+ * Copyright (C) 2011 Siemens AG
+ *
+ * Authors:
+ * Jan Kiszka <jan.kiszka@siemens.com>
+ *
+ * This work is licensed under the terms of the GNU GPL version 2.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+void kvmclock_create(void);
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index d0bd0cd..2918454 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -32,6 +32,7 @@
#include "boards.h"
#include "ide.h"
#include "kvm.h"
+#include "kvmclock.h"
#include "sysemu.h"
#include "sysbus.h"
#include "arch_init.h"
@@ -66,7 +67,8 @@ static void pc_init1(ram_addr_t ram_size,
const char *kernel_cmdline,
const char *initrd_filename,
const char *cpu_model,
- int pci_enabled)
+ int pci_enabled,
+ int kvmclock_enabled)
{
int i;
ram_addr_t below_4g_mem_size, above_4g_mem_size;
@@ -86,6 +88,10 @@ static void pc_init1(ram_addr_t ram_size,
pc_cpus_init(cpu_model);
+ if (kvmclock_enabled) {
+ kvmclock_create();
+ }
+
/* allocate ram and load rom/bios */
pc_memory_init(ram_size, kernel_filename, kernel_cmdline, initrd_filename,
&below_4g_mem_size, &above_4g_mem_size);
@@ -193,7 +199,19 @@ static void pc_init_pci(ram_addr_t ram_size,
{
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
- initrd_filename, cpu_model, 1);
+ initrd_filename, cpu_model, 1, 1);
+}
+
+static void pc_init_pci_no_kvmclock(ram_addr_t ram_size,
+ const char *boot_device,
+ const char *kernel_filename,
+ const char *kernel_cmdline,
+ const char *initrd_filename,
+ const char *cpu_model)
+{
+ pc_init1(ram_size, boot_device,
+ kernel_filename, kernel_cmdline,
+ initrd_filename, cpu_model, 1, 0);
}
static void pc_init_isa(ram_addr_t ram_size,
@@ -207,7 +225,7 @@ static void pc_init_isa(ram_addr_t ram_size,
cpu_model = "486";
pc_init1(ram_size, boot_device,
kernel_filename, kernel_cmdline,
- initrd_filename, cpu_model, 0);
+ initrd_filename, cpu_model, 0, 1);
}
static QEMUMachine pc_machine = {
@@ -222,7 +240,7 @@ static QEMUMachine pc_machine = {
static QEMUMachine pc_machine_v0_13 = {
.name = "pc-0.13",
.desc = "Standard PC",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -249,7 +267,7 @@ static QEMUMachine pc_machine_v0_13 = {
static QEMUMachine pc_machine_v0_12 = {
.name = "pc-0.12",
.desc = "Standard PC",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -280,7 +298,7 @@ static QEMUMachine pc_machine_v0_12 = {
static QEMUMachine pc_machine_v0_11 = {
.name = "pc-0.11",
.desc = "Standard PC, qemu 0.11",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
@@ -319,7 +337,7 @@ static QEMUMachine pc_machine_v0_11 = {
static QEMUMachine pc_machine_v0_10 = {
.name = "pc-0.10",
.desc = "Standard PC, qemu 0.10",
- .init = pc_init_pci,
+ .init = pc_init_pci_no_kvmclock,
.max_cpus = 255,
.compat_props = (GlobalProperty[]) {
{
--
1.7.4
^ permalink raw reply related [flat|nested] 85+ messages in thread
* Re: [Qemu-devel] [PATCH 00/37] [PULL] qemu-kvm.git uq/master queue
2011-02-14 15:22 ` [Qemu-devel] " Marcelo Tosatti
` (37 preceding siblings ...)
(?)
@ 2011-02-14 20:17 ` Anthony Liguori
-1 siblings, 0 replies; 85+ messages in thread
From: Anthony Liguori @ 2011-02-14 20:17 UTC (permalink / raw)
To: Marcelo Tosatti; +Cc: Anthony Liguori, qemu-devel, kvm
On 02/14/2011 09:22 AM, Marcelo Tosatti wrote:
> The following changes since commit 8668f61d20eac971d116ebbe8436b4ae963884a8:
>
> vmmouse: fix queue_size field initialization (2011-02-12 17:44:11 +0000)
>
> are available in the git repository at:
> git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git uq/master
>
Pulled. Thanks.
Regards,
Anthony Liguori
> Anthony PERARD (1):
> Introduce log_start/log_stop in CPUPhysMemoryClient
>
> Glauber Costa (1):
> kvm: make tsc stable over migration and machine start
>
> Jan Kiszka (35):
> Prevent abortion on multiple VCPU kicks
> Stop current VCPU on synchronous reset requests
> Process vmstop requests in IO thread
> Trigger exit from cpu_exec_all on pending IO events
> Leave inner main_loop faster on pending requests
> Flatten the main loop
> kvm: Report proper error on GET_VCPU_MMAP_SIZE failures
> kvm: Drop redundant kvm_enabled from kvm_cpu_thread_fn
> kvm: Handle kvm_init_vcpu errors
> kvm: Provide sigbus services arch-independently
> Refactor signal setup functions in cpus.c
> kvm: Set up signal mask also for !CONFIG_IOTHREAD
> kvm: Refactor qemu_kvm_eat_signals
> kvm: Call qemu_kvm_eat_signals also under !CONFIG_IOTHREAD
> Set up signalfd under !CONFIG_IOTHREAD
> kvm: Fix race between timer signals and vcpu entry under !IOTHREAD
> kvm: Add MCE signal support for !CONFIG_IOTHREAD
> Introduce VCPU self-signaling service
> kvm: Unconditionally reenter kernel after IO exits
> kvm: Remove static return code of kvm_handle_io
> kvm: Leave kvm_cpu_exec directly after KVM_EXIT_SHUTDOWN
> Refactor kvm&tcg function names in cpus.c
> Refactor cpu_has_work/any_cpu_has_work in cpus.c
> Fix a few coding style violations in cpus.c
> Improve vm_stop reason declarations
> Refactor debug and vmstop request interface
> Move debug exception handling out of cpu_exec
> kvm: Separate TCG from KVM cpu execution
> kvm: x86: Prepare VCPU loop for in-kernel irqchip
> kvm: Drop return values from kvm_arch_pre/post_run
> kvm: x86: Catch and report failing IRQ and NMI injections
> kvm: Remove unneeded memory slot reservation
> cirrus: Remove obsolete kvm.h include
> kvm: Make kvm_state globally available
> kvm: x86: Introduce kvmclock device to save/restore its state
>
> Makefile.objs | 2 +-
> Makefile.target | 4 +-
> configure | 6 +
> cpu-all.h | 6 +
> cpu-common.h | 4 +
> cpu-defs.h | 1 +
> cpu-exec.c | 43 +---
> cpus.c | 725 ++++++++++++++++++++++++++++++++--------------------
> cpus.h | 3 +-
> exec.c | 30 +++
> gdbstub.c | 19 +-
> hw/cirrus_vga.c | 1 -
> hw/ide/core.c | 2 +-
> hw/kvmclock.c | 125 +++++++++
> hw/kvmclock.h | 14 +
> hw/pc_piix.c | 32 ++-
> hw/scsi-disk.c | 2 +-
> hw/vga.c | 31 ++-
> hw/vhost.c | 2 +
> hw/virtio-blk.c | 2 +-
> hw/watchdog.c | 2 +-
> kvm-all.c | 89 ++++---
> kvm-stub.c | 15 +-
> kvm.h | 16 +-
> migration.c | 2 +-
> monitor.c | 4 +-
> qemu-common.h | 1 +
> savevm.c | 4 +-
> sysemu.h | 12 +
> target-i386/cpu.h | 1 +
> target-i386/kvm.c | 112 ++++++---
> target-ppc/kvm.c | 16 +-
> target-s390x/kvm.c | 16 +-
> vl.c | 62 +++--
> 34 files changed, 921 insertions(+), 485 deletions(-)
> create mode 100644 hw/kvmclock.c
> create mode 100644 hw/kvmclock.h
>
>
>
^ permalink raw reply [flat|nested] 85+ messages in thread