* [PATCH v3 00/18] target/arm: sve load/store improvements
@ 2020-04-22 4:32 Richard Henderson
2020-04-22 4:32 ` [PATCH v3 01/18] exec: Add block comments for watchpoint routines Richard Henderson
` (18 more replies)
0 siblings, 19 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Because there was a separate v2 of one of the patches,
avoid confusion and call the whole thing v3.
The goal here is to support MTE, but there's some cleanup to do.
Technically, we have sufficient interfaces in cputlb.c now, but it
requires multiple tlb lookups on different interfaces to do so.
Adding probe_access_flags() allows probing the tlb and getting out
some of the flags buried in the tlb comparator, such as TLB_MMIO
and TLB_WATCHPOINT. In addition, we get no-fault semantics,
which we don't have via probe_acccess().
Looking forward to MTE, we can examine the Tagged bit on a per-page
basis and avoid dozens of mte_check calls that must be Unchecked.
That comes later, in a new version of the MTE patch set, but I do
add comments for where the checks should be added.
Version 3 drops cpu_probe_watchpoint, because while adding new
documentation I found we already had cpu_watchpoint_address_matches
which could do the job.
r~
Richard Henderson (18):
exec: Add block comments for watchpoint routines
exec: Fix cpu_watchpoint_address_matches address length
accel/tcg: Add block comment for probe_access
accel/tcg: Add probe_access_flags
accel/tcg: Add endian-specific cpu_{ld,st}* operations
target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn
target/arm: Drop manual handling of set/clear_helper_retaddr
target/arm: Add sve infrastructure for page lookup
target/arm: Adjust interface of sve_ld1_host_fn
target/arm: Use SVEContLdSt in sve_ld1_r
target/arm: Handle watchpoints in sve_ld1_r
target/arm: Use SVEContLdSt for multi-register contiguous loads
target/arm: Update contiguous first-fault and no-fault loads
target/arm: Use SVEContLdSt for contiguous stores
target/arm: Reuse sve_probe_page for gather first-fault loads
target/arm: Reuse sve_probe_page for scatter stores
target/arm: Reuse sve_probe_page for gather loads
target/arm: Remove sve_memopidx
docs/devel/loads-stores.rst | 39 +-
include/exec/cpu-all.h | 13 +-
include/exec/cpu_ldst.h | 277 ++++-
include/exec/exec-all.h | 39 +
include/hw/core/cpu.h | 23 +
target/arm/internals.h | 5 -
accel/tcg/cputlb.c | 413 ++++---
accel/tcg/user-exec.c | 247 +++-
exec.c | 2 +-
target/arm/sve_helper.c | 2237 +++++++++++++++++++----------------
target/arm/translate-sve.c | 17 +-
11 files changed, 1985 insertions(+), 1327 deletions(-)
--
2.20.1
^ permalink raw reply [flat|nested] 34+ messages in thread
* [PATCH v3 01/18] exec: Add block comments for watchpoint routines
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 9:27 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length Richard Henderson
` (17 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/hw/core/cpu.h | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 5bf94d28cf..07f7698155 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -1100,8 +1100,31 @@ int cpu_watchpoint_remove(CPUState *cpu, vaddr addr,
vaddr len, int flags);
void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint);
void cpu_watchpoint_remove_all(CPUState *cpu, int mask);
+
+/**
+ * cpu_check_watchpoint:
+ * @cpu: cpu context
+ * @addr: guest virtual address
+ * @len: access length
+ * @attrs: memory access attributes
+ * @flags: watchpoint access type
+ * @ra: unwind return address
+ *
+ * Check for a watchpoint hit in [addr, addr+len) of the type
+ * specified by @flags. Exit via exception with a hit.
+ */
void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
MemTxAttrs attrs, int flags, uintptr_t ra);
+
+/**
+ * cpu_watchpoint_address_matches:
+ * @cpu: cpu context
+ * @addr: guest virtual address
+ * @len: access length
+ *
+ * Return the watchpoint flags that apply to [addr, addr+len).
+ * If no watchpoint is registered for the range, the result is 0.
+ */
int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len);
#endif
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
2020-04-22 4:32 ` [PATCH v3 01/18] exec: Add block comments for watchpoint routines Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 9:28 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 03/18] accel/tcg: Add block comment for probe_access Richard Henderson
` (16 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
The only caller of cpu_watchpoint_address_matches passes
TARGET_PAGE_SIZE, so the bug is not currently visible.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
exec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/exec.c b/exec.c
index 2874bb5088..5162f0d12f 100644
--- a/exec.c
+++ b/exec.c
@@ -1127,7 +1127,7 @@ int cpu_watchpoint_address_matches(CPUState *cpu, vaddr addr, vaddr len)
int ret = 0;
QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) {
- if (watchpoint_address_matches(wp, addr, TARGET_PAGE_SIZE)) {
+ if (watchpoint_address_matches(wp, addr, len)) {
ret |= wp->flags;
}
}
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 03/18] accel/tcg: Add block comment for probe_access
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
2020-04-22 4:32 ` [PATCH v3 01/18] exec: Add block comments for watchpoint routines Richard Henderson
2020-04-22 4:32 ` [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-22 4:32 ` [PATCH v3 04/18] accel/tcg: Add probe_access_flags Richard Henderson
` (15 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
include/exec/exec-all.h | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 350c4b451b..d656a1f05c 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -330,6 +330,23 @@ static inline void tlb_flush_by_mmuidx_all_cpus_synced(CPUState *cpu,
{
}
#endif
+/**
+ * probe_access:
+ * @env: CPUArchState
+ * @addr: guest virtual address to look up
+ * @size: size of the access
+ * @access_type: read, write or execute permission
+ * @mmu_idx: MMU index to use for lookup
+ * @retaddr: return address for unwinding
+ *
+ * Look up the guest virtual address @addr. Raise an exception if the
+ * page does not satisfy @access_type. Raise an exception if the
+ * access (@addr, @size) hits a watchpoint. For writes, mark a clean
+ * page as dirty.
+ *
+ * Finally, return the host address for a page that is backed by RAM,
+ * or NULL if the page requires I/O.
+ */
void *probe_access(CPUArchState *env, target_ulong addr, int size,
MMUAccessType access_type, int mmu_idx, uintptr_t retaddr);
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 04/18] accel/tcg: Add probe_access_flags
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (2 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 03/18] accel/tcg: Add block comment for probe_access Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 10:48 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations Richard Henderson
` (14 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
This new interface will allow targets to probe for a page
and then handle watchpoints themselves. This will be most
useful for vector predicated memory operations, where one
page lookup can be used for many operations, and one test
can avoid many watchpoint checks.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Fix return of host pointer in softmmu probe_access_flags.
---
include/exec/cpu-all.h | 13 ++-
include/exec/exec-all.h | 22 +++++
accel/tcg/cputlb.c | 177 ++++++++++++++++++++--------------------
accel/tcg/user-exec.c | 36 +++++---
4 files changed, 149 insertions(+), 99 deletions(-)
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
index 49384bb66a..43ddcf024c 100644
--- a/include/exec/cpu-all.h
+++ b/include/exec/cpu-all.h
@@ -328,7 +328,18 @@ CPUArchState *cpu_copy(CPUArchState *env);
| CPU_INTERRUPT_TGT_EXT_3 \
| CPU_INTERRUPT_TGT_EXT_4)
-#if !defined(CONFIG_USER_ONLY)
+#ifdef CONFIG_USER_ONLY
+
+/*
+ * Allow some level of source compatibility with softmmu. We do not
+ * support any of the more exotic features, so only invalid pages may
+ * be signaled by probe_access_flags().
+ */
+#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS_MIN - 1))
+#define TLB_MMIO 0
+#define TLB_WATCHPOINT 0
+
+#else
/*
* Flags stored in the low bits of the TLB virtual address.
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index d656a1f05c..8792bea07a 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -362,6 +362,28 @@ static inline void *probe_read(CPUArchState *env, target_ulong addr, int size,
return probe_access(env, addr, size, MMU_DATA_LOAD, mmu_idx, retaddr);
}
+/**
+ * probe_access_flags:
+ * @env: CPUArchState
+ * @addr: guest virtual address to look up
+ * @access_type: read, write or execute permission
+ * @mmu_idx: MMU index to use for lookup
+ * @nonfault: suppress the fault
+ * @phost: return value for host address
+ * @retaddr: return address for unwinding
+ *
+ * Similar to probe_access, loosely returning the TLB_FLAGS_MASK for
+ * the page, and storing the host address for RAM in @phost.
+ *
+ * If @nonfault is set, do not raise an exception but return TLB_INVALID_MASK.
+ * Do not handle watchpoints, but include TLB_WATCHPOINT in the returned flags.
+ * Do handle clean pages, so exclude TLB_NOTDIRY from the returned flags.
+ * For simplicity, all "mmio-like" flags are folded to TLB_MMIO.
+ */
+int probe_access_flags(CPUArchState *env, target_ulong addr,
+ MMUAccessType access_type, int mmu_idx,
+ bool nonfault, void **phost, uintptr_t retaddr);
+
#define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */
/* Estimated block size for TB allocation. */
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index e3b5750c3b..bbe265ce28 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -1231,86 +1231,16 @@ static void notdirty_write(CPUState *cpu, vaddr mem_vaddr, unsigned size,
}
}
-/*
- * Probe for whether the specified guest access is permitted. If it is not
- * permitted then an exception will be taken in the same way as if this
- * were a real access (and we will not return).
- * If the size is 0 or the page requires I/O access, returns NULL; otherwise,
- * returns the address of the host page similar to tlb_vaddr_to_host().
- */
-void *probe_access(CPUArchState *env, target_ulong addr, int size,
- MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+static int probe_access_internal(CPUArchState *env, target_ulong addr,
+ int fault_size, MMUAccessType access_type,
+ int mmu_idx, bool nonfault,
+ void **phost, uintptr_t retaddr)
{
uintptr_t index = tlb_index(env, mmu_idx, addr);
CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
- target_ulong tlb_addr;
- size_t elt_ofs;
- int wp_access;
-
- g_assert(-(addr | TARGET_PAGE_MASK) >= size);
-
- switch (access_type) {
- case MMU_DATA_LOAD:
- elt_ofs = offsetof(CPUTLBEntry, addr_read);
- wp_access = BP_MEM_READ;
- break;
- case MMU_DATA_STORE:
- elt_ofs = offsetof(CPUTLBEntry, addr_write);
- wp_access = BP_MEM_WRITE;
- break;
- case MMU_INST_FETCH:
- elt_ofs = offsetof(CPUTLBEntry, addr_code);
- wp_access = BP_MEM_READ;
- break;
- default:
- g_assert_not_reached();
- }
- tlb_addr = tlb_read_ofs(entry, elt_ofs);
-
- if (unlikely(!tlb_hit(tlb_addr, addr))) {
- if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs,
- addr & TARGET_PAGE_MASK)) {
- tlb_fill(env_cpu(env), addr, size, access_type, mmu_idx, retaddr);
- /* TLB resize via tlb_fill may have moved the entry. */
- index = tlb_index(env, mmu_idx, addr);
- entry = tlb_entry(env, mmu_idx, addr);
- }
- tlb_addr = tlb_read_ofs(entry, elt_ofs);
- }
-
- if (!size) {
- return NULL;
- }
-
- if (unlikely(tlb_addr & TLB_FLAGS_MASK)) {
- CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
-
- /* Reject I/O access, or other required slow-path. */
- if (tlb_addr & (TLB_MMIO | TLB_BSWAP | TLB_DISCARD_WRITE)) {
- return NULL;
- }
-
- /* Handle watchpoints. */
- if (tlb_addr & TLB_WATCHPOINT) {
- cpu_check_watchpoint(env_cpu(env), addr, size,
- iotlbentry->attrs, wp_access, retaddr);
- }
-
- /* Handle clean RAM pages. */
- if (tlb_addr & TLB_NOTDIRTY) {
- notdirty_write(env_cpu(env), addr, size, iotlbentry, retaddr);
- }
- }
-
- return (void *)((uintptr_t)addr + entry->addend);
-}
-
-void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
- MMUAccessType access_type, int mmu_idx)
-{
- CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
- target_ulong tlb_addr, page;
+ target_ulong tlb_addr, page_addr;
size_t elt_ofs;
+ int flags;
switch (access_type) {
case MMU_DATA_LOAD:
@@ -1325,20 +1255,19 @@ void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
default:
g_assert_not_reached();
}
-
- page = addr & TARGET_PAGE_MASK;
tlb_addr = tlb_read_ofs(entry, elt_ofs);
- if (!tlb_hit_page(tlb_addr, page)) {
- uintptr_t index = tlb_index(env, mmu_idx, addr);
-
- if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs, page)) {
+ page_addr = addr & TARGET_PAGE_MASK;
+ if (!tlb_hit_page(tlb_addr, page_addr)) {
+ if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs, page_addr)) {
CPUState *cs = env_cpu(env);
CPUClass *cc = CPU_GET_CLASS(cs);
- if (!cc->tlb_fill(cs, addr, 0, access_type, mmu_idx, true, 0)) {
+ if (!cc->tlb_fill(cs, addr, fault_size, access_type,
+ mmu_idx, nonfault, retaddr)) {
/* Non-faulting page table read failed. */
- return NULL;
+ *phost = NULL;
+ return TLB_INVALID_MASK;
}
/* TLB resize via tlb_fill may have moved the entry. */
@@ -1346,15 +1275,89 @@ void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
}
tlb_addr = tlb_read_ofs(entry, elt_ofs);
}
+ flags = tlb_addr & TLB_FLAGS_MASK;
- if (tlb_addr & ~TARGET_PAGE_MASK) {
- /* IO access */
+ /* Fold all "mmio-like" bits into TLB_MMIO. This is not RAM. */
+ if (unlikely(flags & ~(TLB_WATCHPOINT | TLB_NOTDIRTY))) {
+ *phost = NULL;
+ return TLB_MMIO;
+ }
+
+ /* Everything else is RAM. */
+ *phost = (void *)((uintptr_t)addr + entry->addend);
+ return flags;
+}
+
+int probe_access_flags(CPUArchState *env, target_ulong addr,
+ MMUAccessType access_type, int mmu_idx,
+ bool nonfault, void **phost, uintptr_t retaddr)
+{
+ int flags;
+
+ flags = probe_access_internal(env, addr, 0, access_type, mmu_idx,
+ nonfault, phost, retaddr);
+
+ /* Handle clean RAM pages. */
+ if (unlikely(flags & TLB_NOTDIRTY)) {
+ uintptr_t index = tlb_index(env, mmu_idx, addr);
+ CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
+
+ notdirty_write(env_cpu(env), addr, 1, iotlbentry, retaddr);
+ flags &= ~TLB_NOTDIRTY;
+ }
+
+ return flags;
+}
+
+void *probe_access(CPUArchState *env, target_ulong addr, int size,
+ MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+{
+ void *host;
+ int flags;
+
+ g_assert(-(addr | TARGET_PAGE_MASK) >= size);
+
+ flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
+ false, &host, retaddr);
+
+ /* Per the interface, size == 0 merely faults the access. */
+ if (size == 0) {
return NULL;
}
- return (void *)((uintptr_t)addr + entry->addend);
+ if (unlikely(flags & (TLB_NOTDIRTY | TLB_WATCHPOINT))) {
+ uintptr_t index = tlb_index(env, mmu_idx, addr);
+ CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
+
+ /* Handle clean RAM pages. */
+ if (flags & TLB_NOTDIRTY) {
+ notdirty_write(env_cpu(env), addr, 1, iotlbentry, retaddr);
+ }
+
+ /* Handle watchpoints. */
+ if (flags & TLB_WATCHPOINT) {
+ int wp_access = (access_type == MMU_DATA_STORE
+ ? BP_MEM_WRITE : BP_MEM_READ);
+ cpu_check_watchpoint(env_cpu(env), addr, size,
+ iotlbentry->attrs, wp_access, retaddr);
+ }
+ }
+
+ return host;
}
+void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
+ MMUAccessType access_type, int mmu_idx)
+{
+ void *host;
+ int flags;
+
+ flags = probe_access_internal(env, addr, 0, access_type,
+ mmu_idx, true, &host, 0);
+
+ /* No combination of flags are expected by the caller. */
+ return flags ? NULL : host;
+}
#ifdef CONFIG_PLUGIN
/*
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 4be78eb9b3..91c2dc46dd 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -190,13 +190,12 @@ static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info,
g_assert_not_reached();
}
-void *probe_access(CPUArchState *env, target_ulong addr, int size,
- MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+int probe_access_flags(CPUArchState *env, target_ulong addr,
+ MMUAccessType access_type, int mmu_idx,
+ bool nonfault, void **phost, uintptr_t ra)
{
int flags;
- g_assert(-(addr | TARGET_PAGE_MASK) >= size);
-
switch (access_type) {
case MMU_DATA_STORE:
flags = PAGE_WRITE;
@@ -211,15 +210,30 @@ void *probe_access(CPUArchState *env, target_ulong addr, int size,
g_assert_not_reached();
}
- if (!guest_addr_valid(addr) || page_check_range(addr, size, flags) < 0) {
- CPUState *cpu = env_cpu(env);
- CPUClass *cc = CPU_GET_CLASS(cpu);
- cc->tlb_fill(cpu, addr, size, access_type, MMU_USER_IDX, false,
- retaddr);
- g_assert_not_reached();
+ if (!guest_addr_valid(addr) || page_check_range(addr, 1, flags) < 0) {
+ if (nonfault) {
+ *phost = NULL;
+ return TLB_INVALID_MASK;
+ } else {
+ CPUState *cpu = env_cpu(env);
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+ cc->tlb_fill(cpu, addr, 0, access_type, MMU_USER_IDX, false, ra);
+ g_assert_not_reached();
+ }
}
- return size ? g2h(addr) : NULL;
+ *phost = g2h(addr);
+ return 0;
+}
+
+void *probe_access(CPUArchState *env, target_ulong addr, int size,
+ MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
+{
+ void *host;
+
+ g_assert(-(addr | TARGET_PAGE_MASK) >= size);
+ probe_access_flags(env, addr, access_type, mmu_idx, false, &host, retaddr);
+ return host;
}
#if defined(__i386__)
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (3 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 04/18] accel/tcg: Add probe_access_flags Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 9:46 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn Richard Henderson
` (13 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
We currently have target-endian versions of these operations,
but no easy way to force a specific endianness. This can be
helpful if the target has endian-specific operations, or a mode
that swaps endianness.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
docs/devel/loads-stores.rst | 39 +++--
include/exec/cpu_ldst.h | 277 +++++++++++++++++++++++++++---------
accel/tcg/cputlb.c | 236 ++++++++++++++++++++++--------
accel/tcg/user-exec.c | 211 ++++++++++++++++++++++-----
4 files changed, 587 insertions(+), 176 deletions(-)
diff --git a/docs/devel/loads-stores.rst b/docs/devel/loads-stores.rst
index 0d99eb24c1..9a944ef1af 100644
--- a/docs/devel/loads-stores.rst
+++ b/docs/devel/loads-stores.rst
@@ -97,9 +97,9 @@ function, which is a return address into the generated code.
Function names follow the pattern:
-load: ``cpu_ld{sign}{size}_mmuidx_ra(env, ptr, mmuidx, retaddr)``
+load: ``cpu_ld{sign}{size}{end}_mmuidx_ra(env, ptr, mmuidx, retaddr)``
-store: ``cpu_st{size}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
+store: ``cpu_st{size}{end}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
``sign``
- (empty) : for 32 or 64 bit sizes
@@ -112,9 +112,14 @@ store: ``cpu_st{size}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
- ``l`` : 32 bits
- ``q`` : 64 bits
+``end``
+ - (empty) : for target endian, or 8 bit sizes
+ - ``_be`` : big endian
+ - ``_le`` : little endian
+
Regexes for git grep:
- - ``\<cpu_ld[us]\?[bwlq]_mmuidx_ra\>``
- - ``\<cpu_st[bwlq]_mmuidx_ra\>``
+ - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_mmuidx_ra\>``
+ - ``\<cpu_st[bwlq](_[bl]e)\?_mmuidx_ra\>``
``cpu_{ld,st}*_data_ra``
~~~~~~~~~~~~~~~~~~~~~~~~
@@ -129,9 +134,9 @@ be performed with a context other than the default.
Function names follow the pattern:
-load: ``cpu_ld{sign}{size}_data_ra(env, ptr, ra)``
+load: ``cpu_ld{sign}{size}{end}_data_ra(env, ptr, ra)``
-store: ``cpu_st{size}_data_ra(env, ptr, val, ra)``
+store: ``cpu_st{size}{end}_data_ra(env, ptr, val, ra)``
``sign``
- (empty) : for 32 or 64 bit sizes
@@ -144,9 +149,14 @@ store: ``cpu_st{size}_data_ra(env, ptr, val, ra)``
- ``l`` : 32 bits
- ``q`` : 64 bits
+``end``
+ - (empty) : for target endian, or 8 bit sizes
+ - ``_be`` : big endian
+ - ``_le`` : little endian
+
Regexes for git grep:
- - ``\<cpu_ld[us]\?[bwlq]_data_ra\>``
- - ``\<cpu_st[bwlq]_data_ra\>``
+ - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_data_ra\>``
+ - ``\<cpu_st[bwlq](_[bl]e)\?_data_ra\>``
``cpu_{ld,st}*_data``
~~~~~~~~~~~~~~~~~~~~~
@@ -163,9 +173,9 @@ the CPU state anyway.
Function names follow the pattern:
-load: ``cpu_ld{sign}{size}_data(env, ptr)``
+load: ``cpu_ld{sign}{size}{end}_data(env, ptr)``
-store: ``cpu_st{size}_data(env, ptr, val)``
+store: ``cpu_st{size}{end}_data(env, ptr, val)``
``sign``
- (empty) : for 32 or 64 bit sizes
@@ -178,9 +188,14 @@ store: ``cpu_st{size}_data(env, ptr, val)``
- ``l`` : 32 bits
- ``q`` : 64 bits
+``end``
+ - (empty) : for target endian, or 8 bit sizes
+ - ``_be`` : big endian
+ - ``_le`` : little endian
+
Regexes for git grep
- - ``\<cpu_ld[us]\?[bwlq]_data\>``
- - ``\<cpu_st[bwlq]_data\+\>``
+ - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_data\>``
+ - ``\<cpu_st[bwlq](_[bl]e)\?_data\+\>``
``cpu_ld*_code``
~~~~~~~~~~~~~~~~
diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h
index 53de19753a..1ba515bfcc 100644
--- a/include/exec/cpu_ldst.h
+++ b/include/exec/cpu_ldst.h
@@ -26,12 +26,18 @@
* The syntax for the accessors is:
*
* load: cpu_ld{sign}{size}_{mmusuffix}(env, ptr)
+ * cpu_ld{sign}{size}{end}_{mmusuffix}(env, ptr)
* cpu_ld{sign}{size}_{mmusuffix}_ra(env, ptr, retaddr)
+ * cpu_ld{sign}{size}{end}_{mmusuffix}_ra(env, ptr, retaddr)
* cpu_ld{sign}{size}_mmuidx_ra(env, ptr, mmu_idx, retaddr)
+ * cpu_ld{sign}{size}{end}_mmuidx_ra(env, ptr, mmu_idx, retaddr)
*
* store: cpu_st{size}_{mmusuffix}(env, ptr, val)
+ * cpu_st{size}{end}_{mmusuffix}(env, ptr, val)
* cpu_st{size}_{mmusuffix}_ra(env, ptr, val, retaddr)
+ * cpu_st{size}{end}_{mmusuffix}_ra(env, ptr, val, retaddr)
* cpu_st{size}_mmuidx_ra(env, ptr, val, mmu_idx, retaddr)
+ * cpu_st{size}{end}_mmuidx_ra(env, ptr, val, mmu_idx, retaddr)
*
* sign is:
* (empty): for 32 and 64 bit sizes
@@ -44,6 +50,11 @@
* l: 32 bits
* q: 64 bits
*
+ * end is:
+ * (empty): for target native endian, or for 8 bit access
+ * _be: for forced big endian
+ * _le: for forced little endian
+ *
* mmusuffix is one of the generic suffixes "data" or "code", or "mmuidx".
* The "mmuidx" suffix carries an extra mmu_idx argument that specifies
* the index to use; the "data" and "code" suffixes take the index from
@@ -95,32 +106,57 @@ typedef target_ulong abi_ptr;
#endif
uint32_t cpu_ldub_data(CPUArchState *env, abi_ptr ptr);
-uint32_t cpu_lduw_data(CPUArchState *env, abi_ptr ptr);
-uint32_t cpu_ldl_data(CPUArchState *env, abi_ptr ptr);
-uint64_t cpu_ldq_data(CPUArchState *env, abi_ptr ptr);
int cpu_ldsb_data(CPUArchState *env, abi_ptr ptr);
-int cpu_ldsw_data(CPUArchState *env, abi_ptr ptr);
-uint32_t cpu_ldub_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
-uint32_t cpu_lduw_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
-uint32_t cpu_ldl_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
-uint64_t cpu_ldq_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
-int cpu_ldsb_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
-int cpu_ldsw_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr);
+uint32_t cpu_lduw_be_data(CPUArchState *env, abi_ptr ptr);
+int cpu_ldsw_be_data(CPUArchState *env, abi_ptr ptr);
+uint32_t cpu_ldl_be_data(CPUArchState *env, abi_ptr ptr);
+uint64_t cpu_ldq_be_data(CPUArchState *env, abi_ptr ptr);
+
+uint32_t cpu_lduw_le_data(CPUArchState *env, abi_ptr ptr);
+int cpu_ldsw_le_data(CPUArchState *env, abi_ptr ptr);
+uint32_t cpu_ldl_le_data(CPUArchState *env, abi_ptr ptr);
+uint64_t cpu_ldq_le_data(CPUArchState *env, abi_ptr ptr);
+
+uint32_t cpu_ldub_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+int cpu_ldsb_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+
+uint32_t cpu_lduw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+int cpu_ldsw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+uint32_t cpu_ldl_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+uint64_t cpu_ldq_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+
+uint32_t cpu_lduw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+int cpu_ldsw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+uint32_t cpu_ldl_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
+uint64_t cpu_ldq_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t ra);
void cpu_stb_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
-void cpu_stw_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
-void cpu_stl_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
-void cpu_stq_data(CPUArchState *env, abi_ptr ptr, uint64_t val);
+
+void cpu_stw_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
+void cpu_stl_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
+void cpu_stq_be_data(CPUArchState *env, abi_ptr ptr, uint64_t val);
+
+void cpu_stw_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
+void cpu_stl_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val);
+void cpu_stq_le_data(CPUArchState *env, abi_ptr ptr, uint64_t val);
void cpu_stb_data_ra(CPUArchState *env, abi_ptr ptr,
- uint32_t val, uintptr_t retaddr);
-void cpu_stw_data_ra(CPUArchState *env, abi_ptr ptr,
- uint32_t val, uintptr_t retaddr);
-void cpu_stl_data_ra(CPUArchState *env, abi_ptr ptr,
- uint32_t val, uintptr_t retaddr);
-void cpu_stq_data_ra(CPUArchState *env, abi_ptr ptr,
- uint64_t val, uintptr_t retaddr);
+ uint32_t val, uintptr_t ra);
+
+void cpu_stw_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t ra);
+void cpu_stl_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t ra);
+void cpu_stq_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint64_t val, uintptr_t ra);
+
+void cpu_stw_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t ra);
+void cpu_stl_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t ra);
+void cpu_stq_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint64_t val, uintptr_t ra);
#if defined(CONFIG_USER_ONLY)
@@ -157,34 +193,58 @@ static inline uint32_t cpu_ldub_mmuidx_ra(CPUArchState *env, abi_ptr addr,
return cpu_ldub_data_ra(env, addr, ra);
}
-static inline uint32_t cpu_lduw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
-{
- return cpu_lduw_data_ra(env, addr, ra);
-}
-
-static inline uint32_t cpu_ldl_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
-{
- return cpu_ldl_data_ra(env, addr, ra);
-}
-
-static inline uint64_t cpu_ldq_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
-{
- return cpu_ldq_data_ra(env, addr, ra);
-}
-
static inline int cpu_ldsb_mmuidx_ra(CPUArchState *env, abi_ptr addr,
int mmu_idx, uintptr_t ra)
{
return cpu_ldsb_data_ra(env, addr, ra);
}
-static inline int cpu_ldsw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
+static inline uint32_t cpu_lduw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
{
- return cpu_ldsw_data_ra(env, addr, ra);
+ return cpu_lduw_be_data_ra(env, addr, ra);
+}
+
+static inline int cpu_ldsw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldsw_be_data_ra(env, addr, ra);
+}
+
+static inline uint32_t cpu_ldl_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldl_be_data_ra(env, addr, ra);
+}
+
+static inline uint64_t cpu_ldq_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldq_be_data_ra(env, addr, ra);
+}
+
+static inline uint32_t cpu_lduw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_lduw_le_data_ra(env, addr, ra);
+}
+
+static inline int cpu_ldsw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldsw_le_data_ra(env, addr, ra);
+}
+
+static inline uint32_t cpu_ldl_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldl_le_data_ra(env, addr, ra);
+}
+
+static inline uint64_t cpu_ldq_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_ldq_le_data_ra(env, addr, ra);
}
static inline void cpu_stb_mmuidx_ra(CPUArchState *env, abi_ptr addr,
@@ -193,22 +253,46 @@ static inline void cpu_stb_mmuidx_ra(CPUArchState *env, abi_ptr addr,
cpu_stb_data_ra(env, addr, val, ra);
}
-static inline void cpu_stw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- uint32_t val, int mmu_idx, uintptr_t ra)
+static inline void cpu_stw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint32_t val, int mmu_idx,
+ uintptr_t ra)
{
- cpu_stw_data_ra(env, addr, val, ra);
+ cpu_stw_be_data_ra(env, addr, val, ra);
}
-static inline void cpu_stl_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- uint32_t val, int mmu_idx, uintptr_t ra)
+static inline void cpu_stl_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint32_t val, int mmu_idx,
+ uintptr_t ra)
{
- cpu_stl_data_ra(env, addr, val, ra);
+ cpu_stl_be_data_ra(env, addr, val, ra);
}
-static inline void cpu_stq_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- uint64_t val, int mmu_idx, uintptr_t ra)
+static inline void cpu_stq_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint64_t val, int mmu_idx,
+ uintptr_t ra)
{
- cpu_stq_data_ra(env, addr, val, ra);
+ cpu_stq_be_data_ra(env, addr, val, ra);
+}
+
+static inline void cpu_stw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint32_t val, int mmu_idx,
+ uintptr_t ra)
+{
+ cpu_stw_le_data_ra(env, addr, val, ra);
+}
+
+static inline void cpu_stl_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint32_t val, int mmu_idx,
+ uintptr_t ra)
+{
+ cpu_stl_le_data_ra(env, addr, val, ra);
+}
+
+static inline void cpu_stq_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ uint64_t val, int mmu_idx,
+ uintptr_t ra)
+{
+ cpu_stq_le_data_ra(env, addr, val, ra);
}
#else
@@ -243,29 +327,92 @@ static inline CPUTLBEntry *tlb_entry(CPUArchState *env, uintptr_t mmu_idx,
uint32_t cpu_ldub_mmuidx_ra(CPUArchState *env, abi_ptr addr,
int mmu_idx, uintptr_t ra);
-uint32_t cpu_lduw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra);
-uint32_t cpu_ldl_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra);
-uint64_t cpu_ldq_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra);
-
int cpu_ldsb_mmuidx_ra(CPUArchState *env, abi_ptr addr,
int mmu_idx, uintptr_t ra);
-int cpu_ldsw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra);
+
+uint32_t cpu_lduw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+int cpu_ldsw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+uint32_t cpu_ldl_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+uint64_t cpu_ldq_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+
+uint32_t cpu_lduw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+int cpu_ldsw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+uint32_t cpu_ldl_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
+uint64_t cpu_ldq_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra);
void cpu_stb_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
int mmu_idx, uintptr_t retaddr);
-void cpu_stw_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
- int mmu_idx, uintptr_t retaddr);
-void cpu_stl_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
- int mmu_idx, uintptr_t retaddr);
-void cpu_stq_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint64_t val,
- int mmu_idx, uintptr_t retaddr);
+
+void cpu_stw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr);
+void cpu_stl_be_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr);
+void cpu_stq_be_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint64_t val,
+ int mmu_idx, uintptr_t retaddr);
+
+void cpu_stw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr);
+void cpu_stl_le_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr);
+void cpu_stq_le_mmuidx_ra(CPUArchState *env, abi_ptr addr, uint64_t val,
+ int mmu_idx, uintptr_t retaddr);
#endif /* defined(CONFIG_USER_ONLY) */
+#ifdef TARGET_WORDS_BIGENDIAN
+# define cpu_lduw_data cpu_lduw_be_data
+# define cpu_ldsw_data cpu_ldsw_be_data
+# define cpu_ldl_data cpu_ldl_be_data
+# define cpu_ldq_data cpu_ldq_be_data
+# define cpu_lduw_data_ra cpu_lduw_be_data_ra
+# define cpu_ldsw_data_ra cpu_ldsw_be_data_ra
+# define cpu_ldl_data_ra cpu_ldl_be_data_ra
+# define cpu_ldq_data_ra cpu_ldq_be_data_ra
+# define cpu_lduw_mmuidx_ra cpu_lduw_be_mmuidx_ra
+# define cpu_ldsw_mmuidx_ra cpu_ldsw_be_mmuidx_ra
+# define cpu_ldl_mmuidx_ra cpu_ldl_be_mmuidx_ra
+# define cpu_ldq_mmuidx_ra cpu_ldq_be_mmuidx_ra
+# define cpu_stw_data cpu_stw_be_data
+# define cpu_stl_data cpu_stl_be_data
+# define cpu_stq_data cpu_stq_be_data
+# define cpu_stw_data_ra cpu_stw_be_data_ra
+# define cpu_stl_data_ra cpu_stl_be_data_ra
+# define cpu_stq_data_ra cpu_stq_be_data_ra
+# define cpu_stw_mmuidx_ra cpu_stw_be_mmuidx_ra
+# define cpu_stl_mmuidx_ra cpu_stl_be_mmuidx_ra
+# define cpu_stq_mmuidx_ra cpu_stq_be_mmuidx_ra
+#else
+# define cpu_lduw_data cpu_lduw_le_data
+# define cpu_ldsw_data cpu_ldsw_le_data
+# define cpu_ldl_data cpu_ldl_le_data
+# define cpu_ldq_data cpu_ldq_le_data
+# define cpu_lduw_data_ra cpu_lduw_le_data_ra
+# define cpu_ldsw_data_ra cpu_ldsw_le_data_ra
+# define cpu_ldl_data_ra cpu_ldl_le_data_ra
+# define cpu_ldq_data_ra cpu_ldq_le_data_ra
+# define cpu_lduw_mmuidx_ra cpu_lduw_le_mmuidx_ra
+# define cpu_ldsw_mmuidx_ra cpu_ldsw_le_mmuidx_ra
+# define cpu_ldl_mmuidx_ra cpu_ldl_le_mmuidx_ra
+# define cpu_ldq_mmuidx_ra cpu_ldq_le_mmuidx_ra
+# define cpu_stw_data cpu_stw_le_data
+# define cpu_stl_data cpu_stl_le_data
+# define cpu_stq_data cpu_stq_le_data
+# define cpu_stw_data_ra cpu_stw_le_data_ra
+# define cpu_stl_data_ra cpu_stl_le_data_ra
+# define cpu_stq_data_ra cpu_stq_le_data_ra
+# define cpu_stw_mmuidx_ra cpu_stw_le_mmuidx_ra
+# define cpu_stl_mmuidx_ra cpu_stl_le_mmuidx_ra
+# define cpu_stq_mmuidx_ra cpu_stq_le_mmuidx_ra
+#endif
+
uint32_t cpu_ldub_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_lduw_code(CPUArchState *env, abi_ptr addr);
uint32_t cpu_ldl_code(CPUArchState *env, abi_ptr addr);
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index bbe265ce28..ca18543463 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -1772,36 +1772,54 @@ int cpu_ldsb_mmuidx_ra(CPUArchState *env, abi_ptr addr,
full_ldub_mmu);
}
-uint32_t cpu_lduw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
+uint32_t cpu_lduw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
{
- return cpu_load_helper(env, addr, mmu_idx, ra, MO_TEUW,
- MO_TE == MO_LE
- ? full_le_lduw_mmu : full_be_lduw_mmu);
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_BEUW, full_be_lduw_mmu);
}
-int cpu_ldsw_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
+int cpu_ldsw_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
{
- return (int16_t)cpu_load_helper(env, addr, mmu_idx, ra, MO_TESW,
- MO_TE == MO_LE
- ? full_le_lduw_mmu : full_be_lduw_mmu);
+ return (int16_t)cpu_load_helper(env, addr, mmu_idx, ra, MO_BESW,
+ full_be_lduw_mmu);
}
-uint32_t cpu_ldl_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
+uint32_t cpu_ldl_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
{
- return cpu_load_helper(env, addr, mmu_idx, ra, MO_TEUL,
- MO_TE == MO_LE
- ? full_le_ldul_mmu : full_be_ldul_mmu);
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_BEUL, full_be_ldul_mmu);
}
-uint64_t cpu_ldq_mmuidx_ra(CPUArchState *env, abi_ptr addr,
- int mmu_idx, uintptr_t ra)
+uint64_t cpu_ldq_be_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
{
- return cpu_load_helper(env, addr, mmu_idx, ra, MO_TEQ,
- MO_TE == MO_LE
- ? helper_le_ldq_mmu : helper_be_ldq_mmu);
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_BEQ, helper_be_ldq_mmu);
+}
+
+uint32_t cpu_lduw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_LEUW, full_le_lduw_mmu);
+}
+
+int cpu_ldsw_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return (int16_t)cpu_load_helper(env, addr, mmu_idx, ra, MO_LESW,
+ full_le_lduw_mmu);
+}
+
+uint32_t cpu_ldl_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_LEUL, full_le_ldul_mmu);
+}
+
+uint64_t cpu_ldq_le_mmuidx_ra(CPUArchState *env, abi_ptr addr,
+ int mmu_idx, uintptr_t ra)
+{
+ return cpu_load_helper(env, addr, mmu_idx, ra, MO_LEQ, helper_le_ldq_mmu);
}
uint32_t cpu_ldub_data_ra(CPUArchState *env, target_ulong ptr,
@@ -1815,25 +1833,50 @@ int cpu_ldsb_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
return cpu_ldsb_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
}
-uint32_t cpu_lduw_data_ra(CPUArchState *env, target_ulong ptr,
- uintptr_t retaddr)
+uint32_t cpu_lduw_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
{
- return cpu_lduw_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+ return cpu_lduw_be_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
}
-int cpu_ldsw_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
+int cpu_ldsw_be_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
{
- return cpu_ldsw_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+ return cpu_ldsw_be_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
}
-uint32_t cpu_ldl_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
+uint32_t cpu_ldl_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
{
- return cpu_ldl_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+ return cpu_ldl_be_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
}
-uint64_t cpu_ldq_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
+uint64_t cpu_ldq_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
{
- return cpu_ldq_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+ return cpu_ldq_be_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+}
+
+uint32_t cpu_lduw_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
+{
+ return cpu_lduw_le_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+}
+
+int cpu_ldsw_le_data_ra(CPUArchState *env, target_ulong ptr, uintptr_t retaddr)
+{
+ return cpu_ldsw_le_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+}
+
+uint32_t cpu_ldl_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
+{
+ return cpu_ldl_le_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
+}
+
+uint64_t cpu_ldq_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uintptr_t retaddr)
+{
+ return cpu_ldq_le_mmuidx_ra(env, ptr, cpu_mmu_index(env, false), retaddr);
}
uint32_t cpu_ldub_data(CPUArchState *env, target_ulong ptr)
@@ -1846,24 +1889,44 @@ int cpu_ldsb_data(CPUArchState *env, target_ulong ptr)
return cpu_ldsb_data_ra(env, ptr, 0);
}
-uint32_t cpu_lduw_data(CPUArchState *env, target_ulong ptr)
+uint32_t cpu_lduw_be_data(CPUArchState *env, target_ulong ptr)
{
- return cpu_lduw_data_ra(env, ptr, 0);
+ return cpu_lduw_be_data_ra(env, ptr, 0);
}
-int cpu_ldsw_data(CPUArchState *env, target_ulong ptr)
+int cpu_ldsw_be_data(CPUArchState *env, target_ulong ptr)
{
- return cpu_ldsw_data_ra(env, ptr, 0);
+ return cpu_ldsw_be_data_ra(env, ptr, 0);
}
-uint32_t cpu_ldl_data(CPUArchState *env, target_ulong ptr)
+uint32_t cpu_ldl_be_data(CPUArchState *env, target_ulong ptr)
{
- return cpu_ldl_data_ra(env, ptr, 0);
+ return cpu_ldl_be_data_ra(env, ptr, 0);
}
-uint64_t cpu_ldq_data(CPUArchState *env, target_ulong ptr)
+uint64_t cpu_ldq_be_data(CPUArchState *env, target_ulong ptr)
{
- return cpu_ldq_data_ra(env, ptr, 0);
+ return cpu_ldq_be_data_ra(env, ptr, 0);
+}
+
+uint32_t cpu_lduw_le_data(CPUArchState *env, target_ulong ptr)
+{
+ return cpu_lduw_le_data_ra(env, ptr, 0);
+}
+
+int cpu_ldsw_le_data(CPUArchState *env, target_ulong ptr)
+{
+ return cpu_ldsw_le_data_ra(env, ptr, 0);
+}
+
+uint32_t cpu_ldl_le_data(CPUArchState *env, target_ulong ptr)
+{
+ return cpu_ldl_le_data_ra(env, ptr, 0);
+}
+
+uint64_t cpu_ldq_le_data(CPUArchState *env, target_ulong ptr)
+{
+ return cpu_ldq_le_data_ra(env, ptr, 0);
}
/*
@@ -2121,22 +2184,40 @@ void cpu_stb_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_UB);
}
-void cpu_stw_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
- int mmu_idx, uintptr_t retaddr)
+void cpu_stw_be_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr)
{
- cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_TEUW);
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_BEUW);
}
-void cpu_stl_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
- int mmu_idx, uintptr_t retaddr)
+void cpu_stl_be_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr)
{
- cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_TEUL);
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_BEUL);
}
-void cpu_stq_mmuidx_ra(CPUArchState *env, target_ulong addr, uint64_t val,
- int mmu_idx, uintptr_t retaddr)
+void cpu_stq_be_mmuidx_ra(CPUArchState *env, target_ulong addr, uint64_t val,
+ int mmu_idx, uintptr_t retaddr)
{
- cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_TEQ);
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_BEQ);
+}
+
+void cpu_stw_le_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr)
+{
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_LEUW);
+}
+
+void cpu_stl_le_mmuidx_ra(CPUArchState *env, target_ulong addr, uint32_t val,
+ int mmu_idx, uintptr_t retaddr)
+{
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_LEUL);
+}
+
+void cpu_stq_le_mmuidx_ra(CPUArchState *env, target_ulong addr, uint64_t val,
+ int mmu_idx, uintptr_t retaddr)
+{
+ cpu_store_helper(env, addr, val, mmu_idx, retaddr, MO_LEQ);
}
void cpu_stb_data_ra(CPUArchState *env, target_ulong ptr,
@@ -2145,22 +2226,40 @@ void cpu_stb_data_ra(CPUArchState *env, target_ulong ptr,
cpu_stb_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
}
-void cpu_stw_data_ra(CPUArchState *env, target_ulong ptr,
- uint32_t val, uintptr_t retaddr)
+void cpu_stw_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uint32_t val, uintptr_t retaddr)
{
- cpu_stw_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+ cpu_stw_be_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
}
-void cpu_stl_data_ra(CPUArchState *env, target_ulong ptr,
- uint32_t val, uintptr_t retaddr)
+void cpu_stl_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uint32_t val, uintptr_t retaddr)
{
- cpu_stl_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+ cpu_stl_be_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
}
-void cpu_stq_data_ra(CPUArchState *env, target_ulong ptr,
- uint64_t val, uintptr_t retaddr)
+void cpu_stq_be_data_ra(CPUArchState *env, target_ulong ptr,
+ uint64_t val, uintptr_t retaddr)
{
- cpu_stq_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+ cpu_stq_be_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+}
+
+void cpu_stw_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uint32_t val, uintptr_t retaddr)
+{
+ cpu_stw_le_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+}
+
+void cpu_stl_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uint32_t val, uintptr_t retaddr)
+{
+ cpu_stl_le_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
+}
+
+void cpu_stq_le_data_ra(CPUArchState *env, target_ulong ptr,
+ uint64_t val, uintptr_t retaddr)
+{
+ cpu_stq_le_mmuidx_ra(env, ptr, val, cpu_mmu_index(env, false), retaddr);
}
void cpu_stb_data(CPUArchState *env, target_ulong ptr, uint32_t val)
@@ -2168,19 +2267,34 @@ void cpu_stb_data(CPUArchState *env, target_ulong ptr, uint32_t val)
cpu_stb_data_ra(env, ptr, val, 0);
}
-void cpu_stw_data(CPUArchState *env, target_ulong ptr, uint32_t val)
+void cpu_stw_be_data(CPUArchState *env, target_ulong ptr, uint32_t val)
{
- cpu_stw_data_ra(env, ptr, val, 0);
+ cpu_stw_be_data_ra(env, ptr, val, 0);
}
-void cpu_stl_data(CPUArchState *env, target_ulong ptr, uint32_t val)
+void cpu_stl_be_data(CPUArchState *env, target_ulong ptr, uint32_t val)
{
- cpu_stl_data_ra(env, ptr, val, 0);
+ cpu_stl_be_data_ra(env, ptr, val, 0);
}
-void cpu_stq_data(CPUArchState *env, target_ulong ptr, uint64_t val)
+void cpu_stq_be_data(CPUArchState *env, target_ulong ptr, uint64_t val)
{
- cpu_stq_data_ra(env, ptr, val, 0);
+ cpu_stq_be_data_ra(env, ptr, val, 0);
+}
+
+void cpu_stw_le_data(CPUArchState *env, target_ulong ptr, uint32_t val)
+{
+ cpu_stw_le_data_ra(env, ptr, val, 0);
+}
+
+void cpu_stl_le_data(CPUArchState *env, target_ulong ptr, uint32_t val)
+{
+ cpu_stl_le_data_ra(env, ptr, val, 0);
+}
+
+void cpu_stq_le_data(CPUArchState *env, target_ulong ptr, uint64_t val)
+{
+ cpu_stq_le_data_ra(env, ptr, val, 0);
}
/* First set of helpers allows passing in of OI and RETADDR. This makes
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index 91c2dc46dd..ac45dd118e 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -772,46 +772,90 @@ int cpu_ldsb_data(CPUArchState *env, abi_ptr ptr)
return ret;
}
-uint32_t cpu_lduw_data(CPUArchState *env, abi_ptr ptr)
+uint32_t cpu_lduw_be_data(CPUArchState *env, abi_ptr ptr)
{
uint32_t ret;
- uint16_t meminfo = trace_mem_get_info(MO_TEUW, MMU_USER_IDX, false);
+ uint16_t meminfo = trace_mem_get_info(MO_BEUW, MMU_USER_IDX, false);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- ret = lduw_p(g2h(ptr));
+ ret = lduw_be_p(g2h(ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
return ret;
}
-int cpu_ldsw_data(CPUArchState *env, abi_ptr ptr)
+int cpu_ldsw_be_data(CPUArchState *env, abi_ptr ptr)
{
int ret;
- uint16_t meminfo = trace_mem_get_info(MO_TESW, MMU_USER_IDX, false);
+ uint16_t meminfo = trace_mem_get_info(MO_BESW, MMU_USER_IDX, false);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- ret = ldsw_p(g2h(ptr));
+ ret = ldsw_be_p(g2h(ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
return ret;
}
-uint32_t cpu_ldl_data(CPUArchState *env, abi_ptr ptr)
+uint32_t cpu_ldl_be_data(CPUArchState *env, abi_ptr ptr)
{
uint32_t ret;
- uint16_t meminfo = trace_mem_get_info(MO_TEUL, MMU_USER_IDX, false);
+ uint16_t meminfo = trace_mem_get_info(MO_BEUL, MMU_USER_IDX, false);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- ret = ldl_p(g2h(ptr));
+ ret = ldl_be_p(g2h(ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
return ret;
}
-uint64_t cpu_ldq_data(CPUArchState *env, abi_ptr ptr)
+uint64_t cpu_ldq_be_data(CPUArchState *env, abi_ptr ptr)
{
uint64_t ret;
- uint16_t meminfo = trace_mem_get_info(MO_TEQ, MMU_USER_IDX, false);
+ uint16_t meminfo = trace_mem_get_info(MO_BEQ, MMU_USER_IDX, false);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- ret = ldq_p(g2h(ptr));
+ ret = ldq_be_p(g2h(ptr));
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+ return ret;
+}
+
+uint32_t cpu_lduw_le_data(CPUArchState *env, abi_ptr ptr)
+{
+ uint32_t ret;
+ uint16_t meminfo = trace_mem_get_info(MO_LEUW, MMU_USER_IDX, false);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ ret = lduw_le_p(g2h(ptr));
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+ return ret;
+}
+
+int cpu_ldsw_le_data(CPUArchState *env, abi_ptr ptr)
+{
+ int ret;
+ uint16_t meminfo = trace_mem_get_info(MO_LESW, MMU_USER_IDX, false);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ ret = ldsw_le_p(g2h(ptr));
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+ return ret;
+}
+
+uint32_t cpu_ldl_le_data(CPUArchState *env, abi_ptr ptr)
+{
+ uint32_t ret;
+ uint16_t meminfo = trace_mem_get_info(MO_LEUL, MMU_USER_IDX, false);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ ret = ldl_le_p(g2h(ptr));
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+ return ret;
+}
+
+uint64_t cpu_ldq_le_data(CPUArchState *env, abi_ptr ptr)
+{
+ uint64_t ret;
+ uint16_t meminfo = trace_mem_get_info(MO_LEQ, MMU_USER_IDX, false);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ ret = ldq_le_p(g2h(ptr));
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
return ret;
}
@@ -836,42 +880,82 @@ int cpu_ldsb_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
return ret;
}
-uint32_t cpu_lduw_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+uint32_t cpu_lduw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
{
uint32_t ret;
set_helper_retaddr(retaddr);
- ret = cpu_lduw_data(env, ptr);
+ ret = cpu_lduw_be_data(env, ptr);
clear_helper_retaddr();
return ret;
}
-int cpu_ldsw_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+int cpu_ldsw_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
{
int ret;
set_helper_retaddr(retaddr);
- ret = cpu_ldsw_data(env, ptr);
+ ret = cpu_ldsw_be_data(env, ptr);
clear_helper_retaddr();
return ret;
}
-uint32_t cpu_ldl_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+uint32_t cpu_ldl_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
{
uint32_t ret;
set_helper_retaddr(retaddr);
- ret = cpu_ldl_data(env, ptr);
+ ret = cpu_ldl_be_data(env, ptr);
clear_helper_retaddr();
return ret;
}
-uint64_t cpu_ldq_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+uint64_t cpu_ldq_be_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
{
uint64_t ret;
set_helper_retaddr(retaddr);
- ret = cpu_ldq_data(env, ptr);
+ ret = cpu_ldq_be_data(env, ptr);
+ clear_helper_retaddr();
+ return ret;
+}
+
+uint32_t cpu_lduw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+{
+ uint32_t ret;
+
+ set_helper_retaddr(retaddr);
+ ret = cpu_lduw_le_data(env, ptr);
+ clear_helper_retaddr();
+ return ret;
+}
+
+int cpu_ldsw_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+{
+ int ret;
+
+ set_helper_retaddr(retaddr);
+ ret = cpu_ldsw_le_data(env, ptr);
+ clear_helper_retaddr();
+ return ret;
+}
+
+uint32_t cpu_ldl_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+{
+ uint32_t ret;
+
+ set_helper_retaddr(retaddr);
+ ret = cpu_ldl_le_data(env, ptr);
+ clear_helper_retaddr();
+ return ret;
+}
+
+uint64_t cpu_ldq_le_data_ra(CPUArchState *env, abi_ptr ptr, uintptr_t retaddr)
+{
+ uint64_t ret;
+
+ set_helper_retaddr(retaddr);
+ ret = cpu_ldq_le_data(env, ptr);
clear_helper_retaddr();
return ret;
}
@@ -885,30 +969,57 @@ void cpu_stb_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
}
-void cpu_stw_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
+void cpu_stw_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
{
- uint16_t meminfo = trace_mem_get_info(MO_TEUW, MMU_USER_IDX, true);
+ uint16_t meminfo = trace_mem_get_info(MO_BEUW, MMU_USER_IDX, true);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- stw_p(g2h(ptr), val);
+ stw_be_p(g2h(ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
}
-void cpu_stl_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
+void cpu_stl_be_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
{
- uint16_t meminfo = trace_mem_get_info(MO_TEUL, MMU_USER_IDX, true);
+ uint16_t meminfo = trace_mem_get_info(MO_BEUL, MMU_USER_IDX, true);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- stl_p(g2h(ptr), val);
+ stl_be_p(g2h(ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
}
-void cpu_stq_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
+void cpu_stq_be_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
{
- uint16_t meminfo = trace_mem_get_info(MO_TEQ, MMU_USER_IDX, true);
+ uint16_t meminfo = trace_mem_get_info(MO_BEQ, MMU_USER_IDX, true);
trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
- stq_p(g2h(ptr), val);
+ stq_be_p(g2h(ptr), val);
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+}
+
+void cpu_stw_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
+{
+ uint16_t meminfo = trace_mem_get_info(MO_LEUW, MMU_USER_IDX, true);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ stw_le_p(g2h(ptr), val);
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+}
+
+void cpu_stl_le_data(CPUArchState *env, abi_ptr ptr, uint32_t val)
+{
+ uint16_t meminfo = trace_mem_get_info(MO_LEUL, MMU_USER_IDX, true);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ stl_le_p(g2h(ptr), val);
+ qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
+}
+
+void cpu_stq_le_data(CPUArchState *env, abi_ptr ptr, uint64_t val)
+{
+ uint16_t meminfo = trace_mem_get_info(MO_LEQ, MMU_USER_IDX, true);
+
+ trace_guest_mem_before_exec(env_cpu(env), ptr, meminfo);
+ stq_le_p(g2h(ptr), val);
qemu_plugin_vcpu_mem_cb(env_cpu(env), ptr, meminfo);
}
@@ -920,27 +1031,51 @@ void cpu_stb_data_ra(CPUArchState *env, abi_ptr ptr,
clear_helper_retaddr();
}
-void cpu_stw_data_ra(CPUArchState *env, abi_ptr ptr,
- uint32_t val, uintptr_t retaddr)
+void cpu_stw_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t retaddr)
{
set_helper_retaddr(retaddr);
- cpu_stw_data(env, ptr, val);
+ cpu_stw_be_data(env, ptr, val);
clear_helper_retaddr();
}
-void cpu_stl_data_ra(CPUArchState *env, abi_ptr ptr,
- uint32_t val, uintptr_t retaddr)
+void cpu_stl_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t retaddr)
{
set_helper_retaddr(retaddr);
- cpu_stl_data(env, ptr, val);
+ cpu_stl_be_data(env, ptr, val);
clear_helper_retaddr();
}
-void cpu_stq_data_ra(CPUArchState *env, abi_ptr ptr,
- uint64_t val, uintptr_t retaddr)
+void cpu_stq_be_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint64_t val, uintptr_t retaddr)
{
set_helper_retaddr(retaddr);
- cpu_stq_data(env, ptr, val);
+ cpu_stq_be_data(env, ptr, val);
+ clear_helper_retaddr();
+}
+
+void cpu_stw_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t retaddr)
+{
+ set_helper_retaddr(retaddr);
+ cpu_stw_le_data(env, ptr, val);
+ clear_helper_retaddr();
+}
+
+void cpu_stl_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint32_t val, uintptr_t retaddr)
+{
+ set_helper_retaddr(retaddr);
+ cpu_stl_le_data(env, ptr, val);
+ clear_helper_retaddr();
+}
+
+void cpu_stq_le_data_ra(CPUArchState *env, abi_ptr ptr,
+ uint64_t val, uintptr_t retaddr)
+{
+ set_helper_retaddr(retaddr);
+ cpu_stq_le_data(env, ptr, val);
clear_helper_retaddr();
}
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (4 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 10:51 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 07/18] target/arm: Drop manual handling of set/clear_helper_retaddr Richard Henderson
` (12 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Use the "normal" memory access functions, rather than the
softmmu internal helper functions directly.
Since fb901c905dc3, cpu_mem_index is now a simple extract
from env->hflags and not a large computation. Which means
that it's now more work to pass around this value than it
is to recompute it.
This only adjusts the primitives, and does not clean up
all of the uses within sve_helper.c.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 221 ++++++++++++++++------------------------
1 file changed, 86 insertions(+), 135 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index fdfa652094..655bc9476f 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -3991,9 +3991,8 @@ typedef intptr_t sve_ld1_host_fn(void *vd, void *vg, void *host,
* Load one element into @vd + @reg_off from (@env, @vaddr, @ra).
* The controlling predicate is known to be true.
*/
-typedef void sve_ld1_tlb_fn(CPUARMState *env, void *vd, intptr_t reg_off,
- target_ulong vaddr, TCGMemOpIdx oi, uintptr_t ra);
-typedef sve_ld1_tlb_fn sve_st1_tlb_fn;
+typedef void sve_ldst1_tlb_fn(CPUARMState *env, void *vd, intptr_t reg_off,
+ target_ulong vaddr, uintptr_t retaddr);
/*
* Generate the above primitives.
@@ -4016,27 +4015,23 @@ static intptr_t sve_##NAME##_host(void *vd, void *vg, void *host, \
return mem_off; \
}
-#ifdef CONFIG_SOFTMMU
-#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, HOST, MOEND, TLB) \
+#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, TLB) \
static void sve_##NAME##_tlb(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, TCGMemOpIdx oi, uintptr_t ra) \
+ target_ulong addr, uintptr_t ra) \
{ \
- TYPEM val = TLB(env, addr, oi, ra); \
- *(TYPEE *)(vd + H(reg_off)) = val; \
+ *(TYPEE *)(vd + H(reg_off)) = (TYPEM)TLB(env, addr, ra); \
}
-#else
-#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, HOST, MOEND, TLB) \
+
+#define DO_ST_TLB(NAME, H, TYPEE, TYPEM, TLB) \
static void sve_##NAME##_tlb(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, TCGMemOpIdx oi, uintptr_t ra) \
+ target_ulong addr, uintptr_t ra) \
{ \
- TYPEM val = HOST(g2h(addr)); \
- *(TYPEE *)(vd + H(reg_off)) = val; \
+ TLB(env, addr, (TYPEM)*(TYPEE *)(vd + H(reg_off)), ra); \
}
-#endif
#define DO_LD_PRIM_1(NAME, H, TE, TM) \
DO_LD_HOST(NAME, H, TE, TM, ldub_p) \
- DO_LD_TLB(NAME, H, TE, TM, ldub_p, 0, helper_ret_ldub_mmu)
+ DO_LD_TLB(NAME, H, TE, TM, cpu_ldub_data_ra)
DO_LD_PRIM_1(ld1bb, H1, uint8_t, uint8_t)
DO_LD_PRIM_1(ld1bhu, H1_2, uint16_t, uint8_t)
@@ -4046,39 +4041,51 @@ DO_LD_PRIM_1(ld1bss, H1_4, uint32_t, int8_t)
DO_LD_PRIM_1(ld1bdu, , uint64_t, uint8_t)
DO_LD_PRIM_1(ld1bds, , uint64_t, int8_t)
-#define DO_LD_PRIM_2(NAME, end, MOEND, H, TE, TM, PH, PT) \
- DO_LD_HOST(NAME##_##end, H, TE, TM, PH##_##end##_p) \
- DO_LD_TLB(NAME##_##end, H, TE, TM, PH##_##end##_p, \
- MOEND, helper_##end##_##PT##_mmu)
+#define DO_ST_PRIM_1(NAME, H, TE, TM) \
+ DO_ST_TLB(st1##NAME, H, TE, TM, cpu_stb_data_ra)
-DO_LD_PRIM_2(ld1hh, le, MO_LE, H1_2, uint16_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hsu, le, MO_LE, H1_4, uint32_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hss, le, MO_LE, H1_4, uint32_t, int16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hdu, le, MO_LE, , uint64_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hds, le, MO_LE, , uint64_t, int16_t, lduw, lduw)
+DO_ST_PRIM_1(bb, H1, uint8_t, uint8_t)
+DO_ST_PRIM_1(bh, H1_2, uint16_t, uint8_t)
+DO_ST_PRIM_1(bs, H1_4, uint32_t, uint8_t)
+DO_ST_PRIM_1(bd, , uint64_t, uint8_t)
-DO_LD_PRIM_2(ld1ss, le, MO_LE, H1_4, uint32_t, uint32_t, ldl, ldul)
-DO_LD_PRIM_2(ld1sdu, le, MO_LE, , uint64_t, uint32_t, ldl, ldul)
-DO_LD_PRIM_2(ld1sds, le, MO_LE, , uint64_t, int32_t, ldl, ldul)
+#define DO_LD_PRIM_2(NAME, H, TE, TM, LD) \
+ DO_LD_HOST(ld1##NAME##_be, H, TE, TM, LD##_be_p) \
+ DO_LD_HOST(ld1##NAME##_le, H, TE, TM, LD##_le_p) \
+ DO_LD_TLB(ld1##NAME##_be, H, TE, TM, cpu_##LD##_be_data_ra) \
+ DO_LD_TLB(ld1##NAME##_le, H, TE, TM, cpu_##LD##_le_data_ra)
-DO_LD_PRIM_2(ld1dd, le, MO_LE, , uint64_t, uint64_t, ldq, ldq)
+#define DO_ST_PRIM_2(NAME, H, TE, TM, ST) \
+ DO_ST_TLB(st1##NAME##_be, H, TE, TM, cpu_##ST##_be_data_ra) \
+ DO_ST_TLB(st1##NAME##_le, H, TE, TM, cpu_##ST##_le_data_ra)
-DO_LD_PRIM_2(ld1hh, be, MO_BE, H1_2, uint16_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hsu, be, MO_BE, H1_4, uint32_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hss, be, MO_BE, H1_4, uint32_t, int16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hdu, be, MO_BE, , uint64_t, uint16_t, lduw, lduw)
-DO_LD_PRIM_2(ld1hds, be, MO_BE, , uint64_t, int16_t, lduw, lduw)
+DO_LD_PRIM_2(hh, H1_2, uint16_t, uint16_t, lduw)
+DO_LD_PRIM_2(hsu, H1_4, uint32_t, uint16_t, lduw)
+DO_LD_PRIM_2(hss, H1_4, uint32_t, int16_t, lduw)
+DO_LD_PRIM_2(hdu, , uint64_t, uint16_t, lduw)
+DO_LD_PRIM_2(hds, , uint64_t, int16_t, lduw)
-DO_LD_PRIM_2(ld1ss, be, MO_BE, H1_4, uint32_t, uint32_t, ldl, ldul)
-DO_LD_PRIM_2(ld1sdu, be, MO_BE, , uint64_t, uint32_t, ldl, ldul)
-DO_LD_PRIM_2(ld1sds, be, MO_BE, , uint64_t, int32_t, ldl, ldul)
+DO_ST_PRIM_2(hh, H1_2, uint16_t, uint16_t, stw)
+DO_ST_PRIM_2(hs, H1_4, uint32_t, uint16_t, stw)
+DO_ST_PRIM_2(hd, , uint64_t, uint16_t, stw)
-DO_LD_PRIM_2(ld1dd, be, MO_BE, , uint64_t, uint64_t, ldq, ldq)
+DO_LD_PRIM_2(ss, H1_4, uint32_t, uint32_t, ldl)
+DO_LD_PRIM_2(sdu, , uint64_t, uint32_t, ldl)
+DO_LD_PRIM_2(sds, , uint64_t, int32_t, ldl)
+
+DO_ST_PRIM_2(ss, H1_4, uint32_t, uint32_t, stl)
+DO_ST_PRIM_2(sd, , uint64_t, uint32_t, stl)
+
+DO_LD_PRIM_2(dd, , uint64_t, uint64_t, ldq)
+DO_ST_PRIM_2(dd, , uint64_t, uint64_t, stq)
#undef DO_LD_TLB
+#undef DO_ST_TLB
#undef DO_LD_HOST
#undef DO_LD_PRIM_1
+#undef DO_ST_PRIM_1
#undef DO_LD_PRIM_2
+#undef DO_ST_PRIM_2
/*
* Skip through a sequence of inactive elements in the guarding predicate @vg,
@@ -4152,7 +4159,7 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
uint32_t desc, const uintptr_t retaddr,
const int esz, const int msz,
sve_ld1_host_fn *host_fn,
- sve_ld1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int mmu_idx = get_mmuidx(oi);
@@ -4234,7 +4241,7 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
* on I/O memory, it may succeed but not bring in the TLB entry.
* But even then we have still made forward progress.
*/
- tlb_fn(env, &scratch, reg_off, addr + mem_off, oi, retaddr);
+ tlb_fn(env, &scratch, reg_off, addr + mem_off, retaddr);
reg_off += 1 << esz;
}
#endif
@@ -4293,9 +4300,8 @@ DO_LD1_2(ld1dd, 3, 3)
*/
static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, int size, uintptr_t ra,
- sve_ld1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[2] = { };
@@ -4305,8 +4311,8 @@ static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, oi, ra);
- tlb_fn(env, &scratch[1], i, addr + size, oi, ra);
+ tlb_fn(env, &scratch[0], i, addr, ra);
+ tlb_fn(env, &scratch[1], i, addr + size, ra);
}
i += size, pg >>= size;
addr += 2 * size;
@@ -4321,9 +4327,8 @@ static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, int size, uintptr_t ra,
- sve_ld1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[3] = { };
@@ -4333,9 +4338,9 @@ static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, oi, ra);
- tlb_fn(env, &scratch[1], i, addr + size, oi, ra);
- tlb_fn(env, &scratch[2], i, addr + 2 * size, oi, ra);
+ tlb_fn(env, &scratch[0], i, addr, ra);
+ tlb_fn(env, &scratch[1], i, addr + size, ra);
+ tlb_fn(env, &scratch[2], i, addr + 2 * size, ra);
}
i += size, pg >>= size;
addr += 3 * size;
@@ -4351,9 +4356,8 @@ static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
static void sve_ld4_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, int size, uintptr_t ra,
- sve_ld1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[4] = { };
@@ -4363,10 +4367,10 @@ static void sve_ld4_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, oi, ra);
- tlb_fn(env, &scratch[1], i, addr + size, oi, ra);
- tlb_fn(env, &scratch[2], i, addr + 2 * size, oi, ra);
- tlb_fn(env, &scratch[3], i, addr + 3 * size, oi, ra);
+ tlb_fn(env, &scratch[0], i, addr, ra);
+ tlb_fn(env, &scratch[1], i, addr + size, ra);
+ tlb_fn(env, &scratch[2], i, addr + 2 * size, ra);
+ tlb_fn(env, &scratch[3], i, addr + 3 * size, ra);
}
i += size, pg >>= size;
addr += 4 * size;
@@ -4459,7 +4463,7 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
uint32_t desc, const uintptr_t retaddr,
const int esz, const int msz,
sve_ld1_host_fn *host_fn,
- sve_ld1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int mmu_idx = get_mmuidx(oi);
@@ -4519,7 +4523,7 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
* Perform one normal read, which will fault or not.
* But it is likely to bring the page into the tlb.
*/
- tlb_fn(env, vd, reg_off, addr + mem_off, oi, retaddr);
+ tlb_fn(env, vd, reg_off, addr + mem_off, retaddr);
/* After any fault, zero any leading predicated false elts. */
swap_memzero(vd, reg_off);
@@ -4671,60 +4675,14 @@ DO_LDFF1_LDNF1_2(dd, 3, 3)
#undef DO_LDFF1_LDNF1_1
#undef DO_LDFF1_LDNF1_2
-/*
- * Store contiguous data, protected by a governing predicate.
- */
-
-#ifdef CONFIG_SOFTMMU
-#define DO_ST_TLB(NAME, H, TYPEM, HOST, MOEND, TLB) \
-static void sve_##NAME##_tlb(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, TCGMemOpIdx oi, uintptr_t ra) \
-{ \
- TLB(env, addr, *(TYPEM *)(vd + H(reg_off)), oi, ra); \
-}
-#else
-#define DO_ST_TLB(NAME, H, TYPEM, HOST, MOEND, TLB) \
-static void sve_##NAME##_tlb(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, TCGMemOpIdx oi, uintptr_t ra) \
-{ \
- HOST(g2h(addr), *(TYPEM *)(vd + H(reg_off))); \
-}
-#endif
-
-DO_ST_TLB(st1bb, H1, uint8_t, stb_p, 0, helper_ret_stb_mmu)
-DO_ST_TLB(st1bh, H1_2, uint16_t, stb_p, 0, helper_ret_stb_mmu)
-DO_ST_TLB(st1bs, H1_4, uint32_t, stb_p, 0, helper_ret_stb_mmu)
-DO_ST_TLB(st1bd, , uint64_t, stb_p, 0, helper_ret_stb_mmu)
-
-DO_ST_TLB(st1hh_le, H1_2, uint16_t, stw_le_p, MO_LE, helper_le_stw_mmu)
-DO_ST_TLB(st1hs_le, H1_4, uint32_t, stw_le_p, MO_LE, helper_le_stw_mmu)
-DO_ST_TLB(st1hd_le, , uint64_t, stw_le_p, MO_LE, helper_le_stw_mmu)
-
-DO_ST_TLB(st1ss_le, H1_4, uint32_t, stl_le_p, MO_LE, helper_le_stl_mmu)
-DO_ST_TLB(st1sd_le, , uint64_t, stl_le_p, MO_LE, helper_le_stl_mmu)
-
-DO_ST_TLB(st1dd_le, , uint64_t, stq_le_p, MO_LE, helper_le_stq_mmu)
-
-DO_ST_TLB(st1hh_be, H1_2, uint16_t, stw_be_p, MO_BE, helper_be_stw_mmu)
-DO_ST_TLB(st1hs_be, H1_4, uint32_t, stw_be_p, MO_BE, helper_be_stw_mmu)
-DO_ST_TLB(st1hd_be, , uint64_t, stw_be_p, MO_BE, helper_be_stw_mmu)
-
-DO_ST_TLB(st1ss_be, H1_4, uint32_t, stl_be_p, MO_BE, helper_be_stl_mmu)
-DO_ST_TLB(st1sd_be, , uint64_t, stl_be_p, MO_BE, helper_be_stl_mmu)
-
-DO_ST_TLB(st1dd_be, , uint64_t, stq_be_p, MO_BE, helper_be_stq_mmu)
-
-#undef DO_ST_TLB
-
/*
* Common helpers for all contiguous 1,2,3,4-register predicated stores.
*/
static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, const uintptr_t ra,
const int esize, const int msize,
- sve_st1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
void *vd = &env->vfp.zregs[rd];
@@ -4734,7 +4692,7 @@ static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, vd, i, addr, oi, ra);
+ tlb_fn(env, vd, i, addr, ra);
}
i += esize, pg >>= esize;
addr += msize;
@@ -4746,9 +4704,8 @@ static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, const uintptr_t ra,
const int esize, const int msize,
- sve_st1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
void *d1 = &env->vfp.zregs[rd];
@@ -4759,8 +4716,8 @@ static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, d1, i, addr, oi, ra);
- tlb_fn(env, d2, i, addr + msize, oi, ra);
+ tlb_fn(env, d1, i, addr, ra);
+ tlb_fn(env, d2, i, addr + msize, ra);
}
i += esize, pg >>= esize;
addr += 2 * msize;
@@ -4772,9 +4729,8 @@ static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, const uintptr_t ra,
const int esize, const int msize,
- sve_st1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
void *d1 = &env->vfp.zregs[rd];
@@ -4786,9 +4742,9 @@ static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, d1, i, addr, oi, ra);
- tlb_fn(env, d2, i, addr + msize, oi, ra);
- tlb_fn(env, d3, i, addr + 2 * msize, oi, ra);
+ tlb_fn(env, d1, i, addr, ra);
+ tlb_fn(env, d2, i, addr + msize, ra);
+ tlb_fn(env, d3, i, addr + 2 * msize, ra);
}
i += esize, pg >>= esize;
addr += 3 * msize;
@@ -4800,9 +4756,8 @@ static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
uint32_t desc, const uintptr_t ra,
const int esize, const int msize,
- sve_st1_tlb_fn *tlb_fn)
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
intptr_t i, oprsz = simd_oprsz(desc);
void *d1 = &env->vfp.zregs[rd];
@@ -4815,10 +4770,10 @@ static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
if (pg & 1) {
- tlb_fn(env, d1, i, addr, oi, ra);
- tlb_fn(env, d2, i, addr + msize, oi, ra);
- tlb_fn(env, d3, i, addr + 2 * msize, oi, ra);
- tlb_fn(env, d4, i, addr + 3 * msize, oi, ra);
+ tlb_fn(env, d1, i, addr, ra);
+ tlb_fn(env, d2, i, addr + msize, ra);
+ tlb_fn(env, d3, i, addr + 2 * msize, ra);
+ tlb_fn(env, d4, i, addr + 3 * msize, ra);
}
i += esize, pg >>= esize;
addr += 4 * msize;
@@ -4914,9 +4869,8 @@ static target_ulong off_zd_d(void *reg, intptr_t reg_ofs)
static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn)
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch = { };
@@ -4927,7 +4881,7 @@ static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
do {
if (likely(pg & 1)) {
target_ulong off = off_fn(vm, i);
- tlb_fn(env, &scratch, i, base + (off << scale), oi, ra);
+ tlb_fn(env, &scratch, i, base + (off << scale), ra);
}
i += 4, pg >>= 4;
} while (i & 15);
@@ -4940,9 +4894,8 @@ static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
static void sve_ld1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn)
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc) / 8;
ARMVectorReg scratch = { };
@@ -4952,7 +4905,7 @@ static void sve_ld1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
uint8_t pg = *(uint8_t *)(vg + H1(i));
if (likely(pg & 1)) {
target_ulong off = off_fn(vm, i * 8);
- tlb_fn(env, &scratch, i * 8, base + (off << scale), oi, ra);
+ tlb_fn(env, &scratch, i * 8, base + (off << scale), ra);
}
}
clear_helper_retaddr();
@@ -5114,7 +5067,7 @@ DO_LD_NF(dd_be, , uint64_t, uint64_t, ldq_be_p)
*/
static inline void sve_ldff1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn,
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn,
sve_ld1_nf_fn *nonfault_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
@@ -5130,7 +5083,7 @@ static inline void sve_ldff1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
set_helper_retaddr(ra);
addr = off_fn(vm, reg_off);
addr = base + (addr << scale);
- tlb_fn(env, vd, reg_off, addr, oi, ra);
+ tlb_fn(env, vd, reg_off, addr, ra);
/* The rest of the reads will be non-faulting. */
clear_helper_retaddr();
@@ -5156,7 +5109,7 @@ static inline void sve_ldff1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
static inline void sve_ldff1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn,
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn,
sve_ld1_nf_fn *nonfault_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
@@ -5172,7 +5125,7 @@ static inline void sve_ldff1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
set_helper_retaddr(ra);
addr = off_fn(vm, reg_off);
addr = base + (addr << scale);
- tlb_fn(env, vd, reg_off, addr, oi, ra);
+ tlb_fn(env, vd, reg_off, addr, ra);
/* The rest of the reads will be non-faulting. */
clear_helper_retaddr();
@@ -5282,9 +5235,8 @@ DO_LDFF1_ZPZ_D(dd_be, zd)
static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn)
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc);
@@ -5294,7 +5246,7 @@ static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
do {
if (likely(pg & 1)) {
target_ulong off = off_fn(vm, i);
- tlb_fn(env, vd, i, base + (off << scale), oi, ra);
+ tlb_fn(env, vd, i, base + (off << scale), ra);
}
i += 4, pg >>= 4;
} while (i & 15);
@@ -5304,9 +5256,8 @@ static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ld1_tlb_fn *tlb_fn)
+ zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc) / 8;
@@ -5315,7 +5266,7 @@ static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
uint8_t pg = *(uint8_t *)(vg + H1(i));
if (likely(pg & 1)) {
target_ulong off = off_fn(vm, i * 8);
- tlb_fn(env, vd, i * 8, base + (off << scale), oi, ra);
+ tlb_fn(env, vd, i * 8, base + (off << scale), ra);
}
}
clear_helper_retaddr();
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 07/18] target/arm: Drop manual handling of set/clear_helper_retaddr
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (5 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-22 4:32 ` [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup Richard Henderson
` (11 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Since we converted back to cpu_*_data_ra, we do not need to
do this ourselves.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 38 --------------------------------------
1 file changed, 38 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 655bc9476f..aad2c8c237 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4133,12 +4133,6 @@ static intptr_t max_for_page(target_ulong base, intptr_t mem_off,
return MIN(split, mem_max - mem_off) + mem_off;
}
-#ifndef CONFIG_USER_ONLY
-/* These are normally defined only for CONFIG_USER_ONLY in <exec/cpu_ldst.h> */
-static inline void set_helper_retaddr(uintptr_t ra) { }
-static inline void clear_helper_retaddr(void) { }
-#endif
-
/*
* The result of tlb_vaddr_to_host for user-only is just g2h(x),
* which is always non-null. Elide the useless test.
@@ -4180,7 +4174,6 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
return;
}
mem_off = reg_off >> diffsz;
- set_helper_retaddr(retaddr);
/*
* If the (remaining) load is entirely within a single page, then:
@@ -4195,7 +4188,6 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (test_host_page(host)) {
mem_off = host_fn(vd, vg, host - mem_off, mem_off, mem_max);
tcg_debug_assert(mem_off == mem_max);
- clear_helper_retaddr();
/* After having taken any fault, zero leading inactive elements. */
swap_memzero(vd, reg_off);
return;
@@ -4246,7 +4238,6 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
}
#endif
- clear_helper_retaddr();
memcpy(vd, &scratch, reg_max);
}
@@ -4306,7 +4297,6 @@ static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[2] = { };
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4318,7 +4308,6 @@ static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 2 * size;
} while (i & 15);
}
- clear_helper_retaddr();
/* Wait until all exceptions have been raised to write back. */
memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
@@ -4333,7 +4322,6 @@ static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[3] = { };
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4346,7 +4334,6 @@ static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 3 * size;
} while (i & 15);
}
- clear_helper_retaddr();
/* Wait until all exceptions have been raised to write back. */
memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
@@ -4362,7 +4349,6 @@ static void sve_ld4_r(CPUARMState *env, void *vg, target_ulong addr,
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch[4] = { };
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4376,7 +4362,6 @@ static void sve_ld4_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 4 * size;
} while (i & 15);
}
- clear_helper_retaddr();
/* Wait until all exceptions have been raised to write back. */
memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
@@ -4483,7 +4468,6 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
return;
}
mem_off = reg_off >> diffsz;
- set_helper_retaddr(retaddr);
/*
* If the (remaining) load is entirely within a single page, then:
@@ -4498,7 +4482,6 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (test_host_page(host)) {
mem_off = host_fn(vd, vg, host - mem_off, mem_off, mem_max);
tcg_debug_assert(mem_off == mem_max);
- clear_helper_retaddr();
/* After any fault, zero any leading inactive elements. */
swap_memzero(vd, reg_off);
return;
@@ -4541,7 +4524,6 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
}
#endif
- clear_helper_retaddr();
record_fault(env, reg_off, reg_max);
}
@@ -4687,7 +4669,6 @@ static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
intptr_t i, oprsz = simd_oprsz(desc);
void *vd = &env->vfp.zregs[rd];
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4698,7 +4679,6 @@ static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
addr += msize;
} while (i & 15);
}
- clear_helper_retaddr();
}
static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
@@ -4711,7 +4691,6 @@ static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
void *d1 = &env->vfp.zregs[rd];
void *d2 = &env->vfp.zregs[(rd + 1) & 31];
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4723,7 +4702,6 @@ static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 2 * msize;
} while (i & 15);
}
- clear_helper_retaddr();
}
static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
@@ -4737,7 +4715,6 @@ static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
void *d2 = &env->vfp.zregs[(rd + 1) & 31];
void *d3 = &env->vfp.zregs[(rd + 2) & 31];
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4750,7 +4727,6 @@ static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 3 * msize;
} while (i & 15);
}
- clear_helper_retaddr();
}
static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
@@ -4765,7 +4741,6 @@ static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
void *d3 = &env->vfp.zregs[(rd + 2) & 31];
void *d4 = &env->vfp.zregs[(rd + 3) & 31];
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4779,7 +4754,6 @@ static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
addr += 4 * msize;
} while (i & 15);
}
- clear_helper_retaddr();
}
#define DO_STN_1(N, NAME, ESIZE) \
@@ -4875,7 +4849,6 @@ static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
intptr_t i, oprsz = simd_oprsz(desc);
ARMVectorReg scratch = { };
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -4886,7 +4859,6 @@ static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
i += 4, pg >>= 4;
} while (i & 15);
}
- clear_helper_retaddr();
/* Wait until all exceptions have been raised to write back. */
memcpy(vd, &scratch, oprsz);
@@ -4900,7 +4872,6 @@ static void sve_ld1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
intptr_t i, oprsz = simd_oprsz(desc) / 8;
ARMVectorReg scratch = { };
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; i++) {
uint8_t pg = *(uint8_t *)(vg + H1(i));
if (likely(pg & 1)) {
@@ -4908,7 +4879,6 @@ static void sve_ld1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
tlb_fn(env, &scratch, i * 8, base + (off << scale), ra);
}
}
- clear_helper_retaddr();
/* Wait until all exceptions have been raised to write back. */
memcpy(vd, &scratch, oprsz * 8);
@@ -5080,13 +5050,11 @@ static inline void sve_ldff1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
reg_off = find_next_active(vg, 0, reg_max, MO_32);
if (likely(reg_off < reg_max)) {
/* Perform one normal read, which will fault or not. */
- set_helper_retaddr(ra);
addr = off_fn(vm, reg_off);
addr = base + (addr << scale);
tlb_fn(env, vd, reg_off, addr, ra);
/* The rest of the reads will be non-faulting. */
- clear_helper_retaddr();
}
/* After any fault, zero the leading predicated false elements. */
@@ -5122,13 +5090,11 @@ static inline void sve_ldff1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
reg_off = find_next_active(vg, 0, reg_max, MO_64);
if (likely(reg_off < reg_max)) {
/* Perform one normal read, which will fault or not. */
- set_helper_retaddr(ra);
addr = off_fn(vm, reg_off);
addr = base + (addr << scale);
tlb_fn(env, vd, reg_off, addr, ra);
/* The rest of the reads will be non-faulting. */
- clear_helper_retaddr();
}
/* After any fault, zero the leading predicated false elements. */
@@ -5240,7 +5206,6 @@ static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc);
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; ) {
uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
do {
@@ -5251,7 +5216,6 @@ static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
i += 4, pg >>= 4;
} while (i & 15);
}
- clear_helper_retaddr();
}
static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
@@ -5261,7 +5225,6 @@ static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
intptr_t i, oprsz = simd_oprsz(desc) / 8;
- set_helper_retaddr(ra);
for (i = 0; i < oprsz; i++) {
uint8_t pg = *(uint8_t *)(vg + H1(i));
if (likely(pg & 1)) {
@@ -5269,7 +5232,6 @@ static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
tlb_fn(env, vd, i * 8, base + (off << scale), ra);
}
}
- clear_helper_retaddr();
}
#define DO_ST1_ZPZ_S(MEM, OFS) \
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (6 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 07/18] target/arm: Drop manual handling of set/clear_helper_retaddr Richard Henderson
@ 2020-04-22 4:32 ` Richard Henderson
2020-04-27 11:00 ` Peter Maydell
2020-04-22 4:33 ` [PATCH v3 09/18] target/arm: Adjust interface of sve_ld1_host_fn Richard Henderson
` (10 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:32 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
For contiguous predicated memory operations, we want to
minimize the number of tlb lookups performed. We have
open-coded this for sve_ld1_r, but for correctness with
MTE we will need this for all of the memory operations.
Create a structure that holds the bounds of active elements,
and metadata for two pages. Add routines to find those
active elements, lookup the pages, and run watchpoints
for those pages.
Temporarily mark the functions unused to avoid Werror.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 263 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 261 insertions(+), 2 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index aad2c8c237..2f053a9152 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -1630,7 +1630,7 @@ void HELPER(sve_cpy_z_d)(void *vd, void *vg, uint64_t val, uint32_t desc)
}
}
-/* Big-endian hosts need to frob the byte indicies. If the copy
+/* Big-endian hosts need to frob the byte indices. If the copy
* happens to be 8-byte aligned, then no frobbing necessary.
*/
static void swap_memmove(void *vd, void *vs, size_t n)
@@ -3974,7 +3974,7 @@ void HELPER(sve_fcmla_zpzzz_d)(CPUARMState *env, void *vg, uint32_t desc)
/*
* Load elements into @vd, controlled by @vg, from @host + @mem_ofs.
* Memory is valid through @host + @mem_max. The register element
- * indicies are inferred from @mem_ofs, as modified by the types for
+ * indices are inferred from @mem_ofs, as modified by the types for
* which the helper is built. Return the @mem_ofs of the first element
* not loaded (which is @mem_max if they are all loaded).
*
@@ -4133,6 +4133,265 @@ static intptr_t max_for_page(target_ulong base, intptr_t mem_off,
return MIN(split, mem_max - mem_off) + mem_off;
}
+/*
+ * Resolve the guest virtual address to info->host and info->flags.
+ * If @nofault, return false if the page is invalid, otherwise
+ * exit via page fault exception.
+ */
+
+typedef struct {
+ void *host;
+ int flags;
+ MemTxAttrs attrs;
+} SVEHostPage;
+
+static bool sve_probe_page(SVEHostPage *info, bool nofault,
+ CPUARMState *env, target_ulong addr,
+ int mem_off, MMUAccessType access_type,
+ int mmu_idx, uintptr_t retaddr)
+{
+ int flags;
+
+ addr += mem_off;
+ flags = probe_access_flags(env, addr, access_type, mmu_idx, nofault,
+ &info->host, retaddr);
+ info->flags = flags;
+
+ if (flags & TLB_INVALID_MASK) {
+ g_assert(nofault);
+ return false;
+ }
+
+ /* Ensure that info->host[] is relative to addr, not addr + mem_off. */
+ info->host -= mem_off;
+
+#ifdef CONFIG_USER_ONLY
+ memset(&info->attrs, 0, sizeof(info->attrs));
+#else
+ /*
+ * Find the iotlbentry for addr and return the transaction attributes.
+ * This *must* be present in the TLB because we just found the mapping.
+ */
+ {
+ uintptr_t index = tlb_index(env, mmu_idx, addr);
+
+# ifdef CONFIG_DEBUG_TCG
+ CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
+ target_ulong comparator = (access_type == MMU_DATA_LOAD
+ ? entry->addr_read
+ : tlb_addr_write(entry));
+ g_assert(tlb_hit(comparator, addr));
+# endif
+
+ CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
+ info->attrs = iotlbentry->attrs;
+ }
+#endif
+
+ return true;
+}
+
+
+/*
+ * Analyse contiguous data, protected by a governing predicate.
+ */
+
+typedef enum {
+ FAULT_NO,
+ FAULT_FIRST,
+ FAULT_ALL,
+} SVEContFault;
+
+typedef struct {
+ /*
+ * First and last element wholly contained within the two pages.
+ * mem_off_first[0] and reg_off_first[0] are always set >= 0.
+ * reg_off_last[0] may be < 0 if the first element crosses pages.
+ * All of mem_off_first[1], reg_off_first[1] and reg_off_last[1]
+ * are set >= 0 only if there are complete elements on a second page.
+ *
+ * The reg_off_* offsets are relative to the internal vector register.
+ * The mem_off_first offset is relative to the memory address; the
+ * two offsets are different when a load operation extends, a store
+ * operation truncates, or for multi-register operations.
+ */
+ int16_t mem_off_first[2];
+ int16_t reg_off_first[2];
+ int16_t reg_off_last[2];
+
+ /*
+ * One element that is misaligned and spans both pages,
+ * or -1 if there is no such active element.
+ */
+ int16_t mem_off_split;
+ int16_t reg_off_split;
+
+ /*
+ * The byte offset at which the entire operation crosses a page boundary.
+ * Set >= 0 if and only if the entire operation spans two pages.
+ */
+ int16_t page_split;
+
+ /* TLB data for the two pages. */
+ SVEHostPage page[2];
+} SVEContLdSt;
+
+/*
+ * Find first active element on each page, and a loose bound for the
+ * final element on each page. Identify any single element that spans
+ * the page boundary. Return true if there are any active elements.
+ */
+static bool __attribute__((unused))
+sve_cont_ldst_elements(SVEContLdSt *info, target_ulong addr, uint64_t *vg,
+ intptr_t reg_max, int esz, int msize)
+{
+ const int esize = 1 << esz;
+ const uint64_t pg_mask = pred_esz_masks[esz];
+ intptr_t reg_off_first = -1, reg_off_last = -1, reg_off_split;
+ intptr_t mem_off_last, mem_off_split;
+ intptr_t page_split, elt_split;
+ intptr_t i;
+
+ /* Set all of the element indices to -1, and the TLB data to 0. */
+ memset(info, -1, offsetof(SVEContLdSt, page));
+ memset(info->page, 0, sizeof(info->page));
+
+ /* Gross scan over the entire predicate to find bounds. */
+ i = 0;
+ do {
+ uint64_t pg = vg[i] & pg_mask;
+ if (pg) {
+ reg_off_last = i * 64 + 63 - clz64(pg);
+ if (reg_off_first < 0) {
+ reg_off_first = i * 64 + ctz64(pg);
+ }
+ }
+ } while (++i * 64 < reg_max);
+
+ if (unlikely(reg_off_first < 0)) {
+ /* No active elements, no pages touched. */
+ return false;
+ }
+ tcg_debug_assert(reg_off_last >= 0 && reg_off_last < reg_max);
+
+ info->reg_off_first[0] = reg_off_first;
+ info->mem_off_first[0] = (reg_off_first >> esz) * msize;
+ mem_off_last = (reg_off_last >> esz) * msize;
+
+ page_split = -(addr | TARGET_PAGE_MASK);
+ if (likely(mem_off_last + msize <= page_split)) {
+ /* The entire operation fits within a single page. */
+ info->reg_off_last[0] = reg_off_last;
+ return true;
+ }
+
+ info->page_split = page_split;
+ elt_split = page_split / msize;
+ reg_off_split = elt_split << esz;
+ mem_off_split = elt_split * msize;
+
+ /*
+ * This is the last full element on the first page, but it is not
+ * necessarily active. If there is no full element, i.e. the first
+ * active element is the one that's split, this value remains -1.
+ * It is useful as iteration bounds.
+ */
+ if (elt_split != 0) {
+ info->reg_off_last[0] = reg_off_split - esize;
+ }
+
+ /* Determine if an unaligned element spans the pages. */
+ if (page_split % msize != 0) {
+ /* It is helpful to know if the split element is active. */
+ if ((vg[reg_off_split >> 6] >> (reg_off_split & 63)) & 1) {
+ info->reg_off_split = reg_off_split;
+ info->mem_off_split = mem_off_split;
+
+ if (reg_off_split == reg_off_last) {
+ /* The page crossing element is last. */
+ return true;
+ }
+ }
+ reg_off_split += esize;
+ mem_off_split += msize;
+ }
+
+ /*
+ * We do want the first active element on the second page, because
+ * this may affect the address reported in an exception.
+ */
+ reg_off_split = find_next_active(vg, reg_off_split, reg_max, esz);
+ tcg_debug_assert(reg_off_split <= reg_off_last);
+ info->reg_off_first[1] = reg_off_split;
+ info->mem_off_first[1] = (reg_off_split >> esz) * msize;
+ info->reg_off_last[1] = reg_off_last;
+ return true;
+}
+
+/*
+ * Resolve the guest virtual addresses to info->page[].
+ * Control the generation of page faults with @fault. Return false if
+ * there is no work to do, which can only happen with @fault == FAULT_NO.
+ */
+static bool __attribute__((unused))
+sve_cont_ldst_pages(SVEContLdSt *info, SVEContFault fault, CPUARMState *env,
+ target_ulong addr, MMUAccessType access_type,
+ uintptr_t retaddr)
+{
+ int mmu_idx = cpu_mmu_index(env, false);
+ int mem_off = info->mem_off_first[0];
+ bool nofault = fault == FAULT_NO;
+ bool have_work = true;
+
+ if (!sve_probe_page(&info->page[0], nofault, env, addr, mem_off,
+ access_type, mmu_idx, retaddr)) {
+ /* No work to be done. */
+ return false;
+ }
+
+ if (likely(info->page_split < 0)) {
+ /* The entire operation was on the one page. */
+ return true;
+ }
+
+ /*
+ * If the second page is invalid, then we want the fault address to be
+ * the first byte on that page which is accessed.
+ */
+ if (info->mem_off_split >= 0) {
+ /*
+ * There is an element split across the pages. The fault address
+ * should be the first byte of the second page.
+ */
+ mem_off = info->page_split;
+ /*
+ * If the split element is also the first active element
+ * of the vector, then: For first-fault we should continue
+ * to generate faults for the second page. For no-fault,
+ * we have work only if the second page is valid.
+ */
+ if (info->mem_off_first[0] < info->mem_off_split) {
+ nofault = FAULT_FIRST;
+ have_work = false;
+ }
+ } else {
+ /*
+ * There is no element split across the pages. The fault address
+ * should be the first active element on the second page.
+ */
+ mem_off = info->mem_off_first[1];
+ /*
+ * There must have been one active element on the first page,
+ * so we're out of first-fault territory.
+ */
+ nofault = fault != FAULT_ALL;
+ }
+
+ have_work |= sve_probe_page(&info->page[1], nofault, env, addr, mem_off,
+ access_type, mmu_idx, retaddr);
+ return have_work;
+}
+
/*
* The result of tlb_vaddr_to_host for user-only is just g2h(x),
* which is always non-null. Elide the useless test.
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 09/18] target/arm: Adjust interface of sve_ld1_host_fn
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (7 preceding siblings ...)
2020-04-22 4:32 ` [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 10/18] target/arm: Use SVEContLdSt in sve_ld1_r Richard Henderson
` (9 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
The current interface includes a loop; change it to load a
single element. We will then be able to use the function
for ld{2,3,4} where individual vector elements are not adjacent.
Replace each call with the simplest possible loop over active
elements.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 124 ++++++++++++++++++++--------------------
1 file changed, 63 insertions(+), 61 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 2f053a9152..d007137735 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -3972,20 +3972,10 @@ void HELPER(sve_fcmla_zpzzz_d)(CPUARMState *env, void *vg, uint32_t desc)
*/
/*
- * Load elements into @vd, controlled by @vg, from @host + @mem_ofs.
- * Memory is valid through @host + @mem_max. The register element
- * indices are inferred from @mem_ofs, as modified by the types for
- * which the helper is built. Return the @mem_ofs of the first element
- * not loaded (which is @mem_max if they are all loaded).
- *
- * For softmmu, we have fully validated the guest page. For user-only,
- * we cannot fully validate without taking the mmap lock, but since we
- * know the access is within one host page, if any access is valid they
- * all must be valid. However, when @vg is all false, it may be that
- * no access is valid.
+ * Load one element into @vd + @reg_off from @host.
+ * The controlling predicate is known to be true.
*/
-typedef intptr_t sve_ld1_host_fn(void *vd, void *vg, void *host,
- intptr_t mem_ofs, intptr_t mem_max);
+typedef void sve_ldst1_host_fn(void *vd, intptr_t reg_off, void *host);
/*
* Load one element into @vd + @reg_off from (@env, @vaddr, @ra).
@@ -3999,20 +3989,10 @@ typedef void sve_ldst1_tlb_fn(CPUARMState *env, void *vd, intptr_t reg_off,
*/
#define DO_LD_HOST(NAME, H, TYPEE, TYPEM, HOST) \
-static intptr_t sve_##NAME##_host(void *vd, void *vg, void *host, \
- intptr_t mem_off, const intptr_t mem_max) \
-{ \
- intptr_t reg_off = mem_off * (sizeof(TYPEE) / sizeof(TYPEM)); \
- uint64_t *pg = vg; \
- while (mem_off + sizeof(TYPEM) <= mem_max) { \
- TYPEM val = 0; \
- if (likely((pg[reg_off >> 6] >> (reg_off & 63)) & 1)) { \
- val = HOST(host + mem_off); \
- } \
- *(TYPEE *)(vd + H(reg_off)) = val; \
- mem_off += sizeof(TYPEM), reg_off += sizeof(TYPEE); \
- } \
- return mem_off; \
+static void sve_##NAME##_host(void *vd, intptr_t reg_off, void *host) \
+{ \
+ TYPEM val = HOST(host); \
+ *(TYPEE *)(vd + H(reg_off)) = val; \
}
#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, TLB) \
@@ -4411,7 +4391,7 @@ static inline bool test_host_page(void *host)
static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
uint32_t desc, const uintptr_t retaddr,
const int esz, const int msz,
- sve_ld1_host_fn *host_fn,
+ sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
@@ -4445,8 +4425,12 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (likely(split == mem_max)) {
host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
if (test_host_page(host)) {
- mem_off = host_fn(vd, vg, host - mem_off, mem_off, mem_max);
- tcg_debug_assert(mem_off == mem_max);
+ intptr_t i = reg_off;
+ host -= mem_off;
+ do {
+ host_fn(vd, i, host + (i >> diffsz));
+ i = find_next_active(vg, i + (1 << esz), reg_max, esz);
+ } while (i < reg_max);
/* After having taken any fault, zero leading inactive elements. */
swap_memzero(vd, reg_off);
return;
@@ -4459,7 +4443,12 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
*/
#ifdef CONFIG_USER_ONLY
swap_memzero(&scratch, reg_off);
- host_fn(&scratch, vg, g2h(addr), mem_off, mem_max);
+ host = g2h(addr);
+ do {
+ host_fn(&scratch, reg_off, host + (reg_off >> diffsz));
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ } while (reg_off < reg_max);
#else
memset(&scratch, 0, reg_max);
goto start;
@@ -4477,9 +4466,13 @@ static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
host = tlb_vaddr_to_host(env, addr + mem_off,
MMU_DATA_LOAD, mmu_idx);
if (host) {
- mem_off = host_fn(&scratch, vg, host - mem_off,
- mem_off, split);
- reg_off = mem_off << diffsz;
+ host -= mem_off;
+ do {
+ host_fn(&scratch, reg_off, host + mem_off);
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ mem_off = reg_off >> diffsz;
+ } while (split - mem_off >= (1 << msz));
continue;
}
}
@@ -4706,7 +4699,7 @@ static void record_fault(CPUARMState *env, uintptr_t i, uintptr_t oprsz)
static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
uint32_t desc, const uintptr_t retaddr,
const int esz, const int msz,
- sve_ld1_host_fn *host_fn,
+ sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
@@ -4716,7 +4709,7 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
const int diffsz = esz - msz;
const intptr_t reg_max = simd_oprsz(desc);
const intptr_t mem_max = reg_max >> diffsz;
- intptr_t split, reg_off, mem_off;
+ intptr_t split, reg_off, mem_off, i;
void *host;
/* Skip to the first active element. */
@@ -4739,28 +4732,18 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (likely(split == mem_max)) {
host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
if (test_host_page(host)) {
- mem_off = host_fn(vd, vg, host - mem_off, mem_off, mem_max);
- tcg_debug_assert(mem_off == mem_max);
+ i = reg_off;
+ host -= mem_off;
+ do {
+ host_fn(vd, i, host + (i >> diffsz));
+ i = find_next_active(vg, i + (1 << esz), reg_max, esz);
+ } while (i < reg_max);
/* After any fault, zero any leading inactive elements. */
swap_memzero(vd, reg_off);
return;
}
}
-#ifdef CONFIG_USER_ONLY
- /*
- * The page(s) containing this first element at ADDR+MEM_OFF must
- * be valid. Considering that this first element may be misaligned
- * and cross a page boundary itself, take the rest of the page from
- * the last byte of the element.
- */
- split = max_for_page(addr, mem_off + (1 << msz) - 1, mem_max);
- mem_off = host_fn(vd, vg, g2h(addr), mem_off, split);
-
- /* After any fault, zero any leading inactive elements. */
- swap_memzero(vd, reg_off);
- reg_off = mem_off << diffsz;
-#else
/*
* Perform one normal read, which will fault or not.
* But it is likely to bring the page into the tlb.
@@ -4777,11 +4760,15 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (split >= (1 << msz)) {
host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
if (host) {
- mem_off = host_fn(vd, vg, host - mem_off, mem_off, split);
- reg_off = mem_off << diffsz;
+ host -= mem_off;
+ do {
+ host_fn(vd, reg_off, host + mem_off);
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ mem_off = reg_off >> diffsz;
+ } while (split - mem_off >= (1 << msz));
}
}
-#endif
record_fault(env, reg_off, reg_max);
}
@@ -4791,7 +4778,7 @@ static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
*/
static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
uint32_t desc, const int esz, const int msz,
- sve_ld1_host_fn *host_fn)
+ sve_ldst1_host_fn *host_fn)
{
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
void *vd = &env->vfp.zregs[rd];
@@ -4806,7 +4793,13 @@ static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
host = tlb_vaddr_to_host(env, addr, MMU_DATA_LOAD, mmu_idx);
if (likely(page_check_range(addr, mem_max, PAGE_READ) == 0)) {
/* The entire operation is valid and will not fault. */
- host_fn(vd, vg, host, 0, mem_max);
+ reg_off = 0;
+ do {
+ mem_off = reg_off >> diffsz;
+ host_fn(vd, reg_off, host + mem_off);
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ } while (reg_off < reg_max);
return;
}
#endif
@@ -4826,8 +4819,12 @@ static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
if (page_check_range(addr + mem_off, 1 << msz, PAGE_READ) == 0) {
/* At least one load is valid; take the rest of the page. */
split = max_for_page(addr, mem_off + (1 << msz) - 1, mem_max);
- mem_off = host_fn(vd, vg, host, mem_off, split);
- reg_off = mem_off << diffsz;
+ do {
+ host_fn(vd, reg_off, host + mem_off);
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ mem_off = reg_off >> diffsz;
+ } while (split - mem_off >= (1 << msz));
}
#else
/*
@@ -4848,8 +4845,13 @@ static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
split = max_for_page(addr, mem_off, mem_max);
if (host && split >= (1 << msz)) {
- mem_off = host_fn(vd, vg, host - mem_off, mem_off, split);
- reg_off = mem_off << diffsz;
+ host -= mem_off;
+ do {
+ host_fn(vd, reg_off, host + mem_off);
+ reg_off += 1 << esz;
+ reg_off = find_next_active(vg, reg_off, reg_max, esz);
+ mem_off = reg_off >> diffsz;
+ } while (split - mem_off >= (1 << msz));
}
#endif
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 10/18] target/arm: Use SVEContLdSt in sve_ld1_r
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (8 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 09/18] target/arm: Adjust interface of sve_ld1_host_fn Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 11/18] target/arm: Handle watchpoints " Richard Henderson
` (8 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
First use of the new helper functions, so we can remove the
unused markup. No longer need a scratch for user-only, as
we completely probe the page set before reading; system mode
still requires a scratch for MMIO.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 188 +++++++++++++++++++++-------------------
1 file changed, 97 insertions(+), 91 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index d007137735..6bae342a17 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4221,9 +4221,9 @@ typedef struct {
* final element on each page. Identify any single element that spans
* the page boundary. Return true if there are any active elements.
*/
-static bool __attribute__((unused))
-sve_cont_ldst_elements(SVEContLdSt *info, target_ulong addr, uint64_t *vg,
- intptr_t reg_max, int esz, int msize)
+static bool sve_cont_ldst_elements(SVEContLdSt *info, target_ulong addr,
+ uint64_t *vg, intptr_t reg_max,
+ int esz, int msize)
{
const int esize = 1 << esz;
const uint64_t pg_mask = pred_esz_masks[esz];
@@ -4313,10 +4313,9 @@ sve_cont_ldst_elements(SVEContLdSt *info, target_ulong addr, uint64_t *vg,
* Control the generation of page faults with @fault. Return false if
* there is no work to do, which can only happen with @fault == FAULT_NO.
*/
-static bool __attribute__((unused))
-sve_cont_ldst_pages(SVEContLdSt *info, SVEContFault fault, CPUARMState *env,
- target_ulong addr, MMUAccessType access_type,
- uintptr_t retaddr)
+static bool sve_cont_ldst_pages(SVEContLdSt *info, SVEContFault fault,
+ CPUARMState *env, target_ulong addr,
+ MMUAccessType access_type, uintptr_t retaddr)
{
int mmu_idx = cpu_mmu_index(env, false);
int mem_off = info->mem_off_first[0];
@@ -4388,109 +4387,116 @@ static inline bool test_host_page(void *host)
/*
* Common helper for all contiguous one-register predicated loads.
*/
-static void sve_ld1_r(CPUARMState *env, void *vg, const target_ulong addr,
- uint32_t desc, const uintptr_t retaddr,
- const int esz, const int msz,
- sve_ldst1_host_fn *host_fn,
- sve_ldst1_tlb_fn *tlb_fn)
+static inline QEMU_ALWAYS_INLINE
+void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
+ uint32_t desc, const uintptr_t retaddr,
+ const int esz, const int msz,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
- const int mmu_idx = get_mmuidx(oi);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
void *vd = &env->vfp.zregs[rd];
- const int diffsz = esz - msz;
const intptr_t reg_max = simd_oprsz(desc);
- const intptr_t mem_max = reg_max >> diffsz;
- ARMVectorReg scratch;
+ intptr_t reg_off, reg_last, mem_off;
+ SVEContLdSt info;
void *host;
- intptr_t split, reg_off, mem_off;
+ int flags;
- /* Find the first active element. */
- reg_off = find_next_active(vg, 0, reg_max, esz);
- if (unlikely(reg_off == reg_max)) {
+ /* Find the active elements. */
+ if (!sve_cont_ldst_elements(&info, addr, vg, reg_max, esz, 1 << msz)) {
/* The entire predicate was false; no load occurs. */
memset(vd, 0, reg_max);
return;
}
- mem_off = reg_off >> diffsz;
- /*
- * If the (remaining) load is entirely within a single page, then:
- * For softmmu, and the tlb hits, then no faults will occur;
- * For user-only, either the first load will fault or none will.
- * We can thus perform the load directly to the destination and
- * Vd will be unmodified on any exception path.
- */
- split = max_for_page(addr, mem_off, mem_max);
- if (likely(split == mem_max)) {
- host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
- if (test_host_page(host)) {
- intptr_t i = reg_off;
- host -= mem_off;
- do {
- host_fn(vd, i, host + (i >> diffsz));
- i = find_next_active(vg, i + (1 << esz), reg_max, esz);
- } while (i < reg_max);
- /* After having taken any fault, zero leading inactive elements. */
- swap_memzero(vd, reg_off);
- return;
- }
- }
+ /* Probe the page(s). Exit with exception for any invalid page. */
+ sve_cont_ldst_pages(&info, FAULT_ALL, env, addr, MMU_DATA_LOAD, retaddr);
- /*
- * Perform the predicated read into a temporary, thus ensuring
- * if the load of the last element faults, Vd is not modified.
- */
+ flags = info.page[0].flags | info.page[1].flags;
+ if (unlikely(flags != 0)) {
#ifdef CONFIG_USER_ONLY
- swap_memzero(&scratch, reg_off);
- host = g2h(addr);
- do {
- host_fn(&scratch, reg_off, host + (reg_off >> diffsz));
- reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- } while (reg_off < reg_max);
+ g_assert_not_reached();
#else
- memset(&scratch, 0, reg_max);
- goto start;
- while (1) {
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- if (reg_off >= reg_max) {
- break;
- }
- mem_off = reg_off >> diffsz;
- split = max_for_page(addr, mem_off, mem_max);
+ /*
+ * At least one page includes MMIO (or watchpoints).
+ * Any bus operation can fail with cpu_transaction_failed,
+ * which for ARM will raise SyncExternal. Perform the load
+ * into scratch memory to preserve register state until the end.
+ */
+ ARMVectorReg scratch;
- start:
- if (split - mem_off >= (1 << msz)) {
- /* At least one whole element on this page. */
- host = tlb_vaddr_to_host(env, addr + mem_off,
- MMU_DATA_LOAD, mmu_idx);
- if (host) {
- host -= mem_off;
- do {
- host_fn(&scratch, reg_off, host + mem_off);
- reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- mem_off = reg_off >> diffsz;
- } while (split - mem_off >= (1 << msz));
- continue;
+ memset(&scratch, 0, reg_max);
+ mem_off = info.mem_off_first[0];
+ reg_off = info.reg_off_first[0];
+ reg_last = info.reg_off_last[1];
+ if (reg_last < 0) {
+ reg_last = info.reg_off_split;
+ if (reg_last < 0) {
+ reg_last = info.reg_off_last[0];
}
}
- /*
- * Perform one normal read. This may fault, longjmping out to the
- * main loop in order to raise an exception. It may succeed, and
- * as a side-effect load the TLB entry for the next round. Finally,
- * in the extremely unlikely case we're performing this operation
- * on I/O memory, it may succeed but not bring in the TLB entry.
- * But even then we have still made forward progress.
- */
- tlb_fn(env, &scratch, reg_off, addr + mem_off, retaddr);
- reg_off += 1 << esz;
- }
-#endif
+ do {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ tlb_fn(env, &scratch, reg_off, addr + mem_off, retaddr);
+ }
+ reg_off += 1 << esz;
+ mem_off += 1 << msz;
+ } while (reg_off & 63);
+ } while (reg_off <= reg_last);
- memcpy(vd, &scratch, reg_max);
+ memcpy(vd, &scratch, reg_max);
+ return;
+#endif
+ }
+
+ /* The entire operation is in RAM, on valid pages. */
+
+ memset(vd, 0, reg_max);
+ mem_off = info.mem_off_first[0];
+ reg_off = info.reg_off_first[0];
+ reg_last = info.reg_off_last[0];
+ host = info.page[0].host;
+
+ while (reg_off <= reg_last) {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ host_fn(vd, reg_off, host + mem_off);
+ }
+ reg_off += 1 << esz;
+ mem_off += 1 << msz;
+ } while (reg_off <= reg_last && (reg_off & 63));
+ }
+
+ /*
+ * Use the slow path to manage the cross-page misalignment.
+ * But we know this is RAM and cannot trap.
+ */
+ mem_off = info.mem_off_split;
+ if (unlikely(mem_off >= 0)) {
+ tlb_fn(env, vd, info.reg_off_split, addr + mem_off, retaddr);
+ }
+
+ mem_off = info.mem_off_first[1];
+ if (unlikely(mem_off >= 0)) {
+ reg_off = info.reg_off_first[1];
+ reg_last = info.reg_off_last[1];
+ host = info.page[1].host;
+
+ do {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ host_fn(vd, reg_off, host + mem_off);
+ }
+ reg_off += 1 << esz;
+ mem_off += 1 << msz;
+ } while (reg_off & 63);
+ } while (reg_off <= reg_last);
+ }
}
#define DO_LD1_1(NAME, ESZ) \
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 11/18] target/arm: Handle watchpoints in sve_ld1_r
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (9 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 10/18] target/arm: Use SVEContLdSt in sve_ld1_r Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 12/18] target/arm: Use SVEContLdSt for multi-register contiguous loads Richard Henderson
` (7 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Handle all of the watchpoints for active elements all at once,
before we've modified the vector register. This removes the
TLB_WATCHPOINT bit from page[].flags, which means that we can
use the normal fast path via RAM.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 72 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 71 insertions(+), 1 deletion(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 6bae342a17..7992a569b0 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4371,6 +4371,70 @@ static bool sve_cont_ldst_pages(SVEContLdSt *info, SVEContFault fault,
return have_work;
}
+static void sve_cont_ldst_watchpoints(SVEContLdSt *info, CPUARMState *env,
+ uint64_t *vg, target_ulong addr,
+ int esize, int msize, int wp_access,
+ uintptr_t retaddr)
+{
+#ifndef CONFIG_USER_ONLY
+ intptr_t mem_off, reg_off, reg_last;
+ int flags0 = info->page[0].flags;
+ int flags1 = info->page[1].flags;
+
+ if (likely(!((flags0 | flags1) & TLB_WATCHPOINT))) {
+ return;
+ }
+
+ /* Indicate that watchpoints are handled. */
+ info->page[0].flags = flags0 & ~TLB_WATCHPOINT;
+ info->page[1].flags = flags1 & ~TLB_WATCHPOINT;
+
+ if (flags0 & TLB_WATCHPOINT) {
+ mem_off = info->mem_off_first[0];
+ reg_off = info->reg_off_first[0];
+ reg_last = info->reg_off_last[0];
+
+ while (reg_off <= reg_last) {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ cpu_check_watchpoint(env_cpu(env), addr + mem_off,
+ msize, info->page[0].attrs,
+ wp_access, retaddr);
+ }
+ reg_off += esize;
+ mem_off += msize;
+ } while (reg_off <= reg_last && (reg_off & 63));
+ }
+ }
+
+ mem_off = info->mem_off_split;
+ if (mem_off >= 0) {
+ cpu_check_watchpoint(env_cpu(env), addr + mem_off, msize,
+ info->page[0].attrs, wp_access, retaddr);
+ }
+
+ mem_off = info->mem_off_first[1];
+ if ((flags1 & TLB_WATCHPOINT) && mem_off >= 0) {
+ reg_off = info->reg_off_first[1];
+ reg_last = info->reg_off_last[1];
+
+ do {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ cpu_check_watchpoint(env_cpu(env), addr + mem_off,
+ msize, info->page[1].attrs,
+ wp_access, retaddr);
+ }
+ reg_off += esize;
+ mem_off += msize;
+ } while (reg_off & 63);
+ } while (reg_off <= reg_last);
+ }
+#endif
+}
+
/*
* The result of tlb_vaddr_to_host for user-only is just g2h(x),
* which is always non-null. Elide the useless test.
@@ -4412,13 +4476,19 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
/* Probe the page(s). Exit with exception for any invalid page. */
sve_cont_ldst_pages(&info, FAULT_ALL, env, addr, MMU_DATA_LOAD, retaddr);
+ /* Handle watchpoints for all active elements. */
+ sve_cont_ldst_watchpoints(&info, env, vg, addr, 1 << esz, 1 << msz,
+ BP_MEM_READ, retaddr);
+
+ /* TODO: MTE check. */
+
flags = info.page[0].flags | info.page[1].flags;
if (unlikely(flags != 0)) {
#ifdef CONFIG_USER_ONLY
g_assert_not_reached();
#else
/*
- * At least one page includes MMIO (or watchpoints).
+ * At least one page includes MMIO.
* Any bus operation can fail with cpu_transaction_failed,
* which for ARM will raise SyncExternal. Perform the load
* into scratch memory to preserve register state until the end.
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 12/18] target/arm: Use SVEContLdSt for multi-register contiguous loads
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (10 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 11/18] target/arm: Handle watchpoints " Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads Richard Henderson
` (6 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 223 ++++++++++++++--------------------------
1 file changed, 79 insertions(+), 144 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 7992a569b0..9365e32646 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4449,27 +4449,28 @@ static inline bool test_host_page(void *host)
}
/*
- * Common helper for all contiguous one-register predicated loads.
+ * Common helper for all contiguous 1,2,3,4-register predicated stores.
*/
static inline QEMU_ALWAYS_INLINE
-void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
+void sve_ldN_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
uint32_t desc, const uintptr_t retaddr,
- const int esz, const int msz,
+ const int esz, const int msz, const int N,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- void *vd = &env->vfp.zregs[rd];
const intptr_t reg_max = simd_oprsz(desc);
intptr_t reg_off, reg_last, mem_off;
SVEContLdSt info;
void *host;
- int flags;
+ int flags, i;
/* Find the active elements. */
- if (!sve_cont_ldst_elements(&info, addr, vg, reg_max, esz, 1 << msz)) {
+ if (!sve_cont_ldst_elements(&info, addr, vg, reg_max, esz, N << msz)) {
/* The entire predicate was false; no load occurs. */
- memset(vd, 0, reg_max);
+ for (i = 0; i < N; ++i) {
+ memset(&env->vfp.zregs[(rd + i) & 31], 0, reg_max);
+ }
return;
}
@@ -4477,7 +4478,7 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
sve_cont_ldst_pages(&info, FAULT_ALL, env, addr, MMU_DATA_LOAD, retaddr);
/* Handle watchpoints for all active elements. */
- sve_cont_ldst_watchpoints(&info, env, vg, addr, 1 << esz, 1 << msz,
+ sve_cont_ldst_watchpoints(&info, env, vg, addr, 1 << esz, N << msz,
BP_MEM_READ, retaddr);
/* TODO: MTE check. */
@@ -4493,9 +4494,8 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
* which for ARM will raise SyncExternal. Perform the load
* into scratch memory to preserve register state until the end.
*/
- ARMVectorReg scratch;
+ ARMVectorReg scratch[4] = { };
- memset(&scratch, 0, reg_max);
mem_off = info.mem_off_first[0];
reg_off = info.reg_off_first[0];
reg_last = info.reg_off_last[1];
@@ -4510,21 +4510,29 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
uint64_t pg = vg[reg_off >> 6];
do {
if ((pg >> (reg_off & 63)) & 1) {
- tlb_fn(env, &scratch, reg_off, addr + mem_off, retaddr);
+ for (i = 0; i < N; ++i) {
+ tlb_fn(env, &scratch[i], reg_off,
+ addr + mem_off + (i << msz), retaddr);
+ }
}
reg_off += 1 << esz;
- mem_off += 1 << msz;
+ mem_off += N << msz;
} while (reg_off & 63);
} while (reg_off <= reg_last);
- memcpy(vd, &scratch, reg_max);
+ for (i = 0; i < N; ++i) {
+ memcpy(&env->vfp.zregs[(rd + i) & 31], &scratch[i], reg_max);
+ }
return;
#endif
}
/* The entire operation is in RAM, on valid pages. */
- memset(vd, 0, reg_max);
+ for (i = 0; i < N; ++i) {
+ memset(&env->vfp.zregs[(rd + i) & 31], 0, reg_max);
+ }
+
mem_off = info.mem_off_first[0];
reg_off = info.reg_off_first[0];
reg_last = info.reg_off_last[0];
@@ -4534,10 +4542,13 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
uint64_t pg = vg[reg_off >> 6];
do {
if ((pg >> (reg_off & 63)) & 1) {
- host_fn(vd, reg_off, host + mem_off);
+ for (i = 0; i < N; ++i) {
+ host_fn(&env->vfp.zregs[(rd + i) & 31], reg_off,
+ host + mem_off + (i << msz));
+ }
}
reg_off += 1 << esz;
- mem_off += 1 << msz;
+ mem_off += N << msz;
} while (reg_off <= reg_last && (reg_off & 63));
}
@@ -4547,7 +4558,11 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
*/
mem_off = info.mem_off_split;
if (unlikely(mem_off >= 0)) {
- tlb_fn(env, vd, info.reg_off_split, addr + mem_off, retaddr);
+ reg_off = info.reg_off_split;
+ for (i = 0; i < N; ++i) {
+ tlb_fn(env, &env->vfp.zregs[(rd + i) & 31], reg_off,
+ addr + mem_off + (i << msz), retaddr);
+ }
}
mem_off = info.mem_off_first[1];
@@ -4560,10 +4575,13 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
uint64_t pg = vg[reg_off >> 6];
do {
if ((pg >> (reg_off & 63)) & 1) {
- host_fn(vd, reg_off, host + mem_off);
+ for (i = 0; i < N; ++i) {
+ host_fn(&env->vfp.zregs[(rd + i) & 31], reg_off,
+ host + mem_off + (i << msz));
+ }
}
reg_off += 1 << esz;
- mem_off += 1 << msz;
+ mem_off += N << msz;
} while (reg_off & 63);
} while (reg_off <= reg_last);
}
@@ -4573,7 +4591,7 @@ void sve_ld1_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
void HELPER(sve_##NAME##_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ld1_r(env, vg, addr, desc, GETPC(), ESZ, 0, \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), ESZ, MO_8, 1, \
sve_##NAME##_host, sve_##NAME##_tlb); \
}
@@ -4581,159 +4599,76 @@ void HELPER(sve_##NAME##_r)(CPUARMState *env, void *vg, \
void HELPER(sve_##NAME##_le_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ld1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, 1, \
sve_##NAME##_le_host, sve_##NAME##_le_tlb); \
} \
void HELPER(sve_##NAME##_be_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ld1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, 1, \
sve_##NAME##_be_host, sve_##NAME##_be_tlb); \
}
-DO_LD1_1(ld1bb, 0)
-DO_LD1_1(ld1bhu, 1)
-DO_LD1_1(ld1bhs, 1)
-DO_LD1_1(ld1bsu, 2)
-DO_LD1_1(ld1bss, 2)
-DO_LD1_1(ld1bdu, 3)
-DO_LD1_1(ld1bds, 3)
+DO_LD1_1(ld1bb, MO_8)
+DO_LD1_1(ld1bhu, MO_16)
+DO_LD1_1(ld1bhs, MO_16)
+DO_LD1_1(ld1bsu, MO_32)
+DO_LD1_1(ld1bss, MO_32)
+DO_LD1_1(ld1bdu, MO_64)
+DO_LD1_1(ld1bds, MO_64)
-DO_LD1_2(ld1hh, 1, 1)
-DO_LD1_2(ld1hsu, 2, 1)
-DO_LD1_2(ld1hss, 2, 1)
-DO_LD1_2(ld1hdu, 3, 1)
-DO_LD1_2(ld1hds, 3, 1)
+DO_LD1_2(ld1hh, MO_16, MO_16)
+DO_LD1_2(ld1hsu, MO_32, MO_16)
+DO_LD1_2(ld1hss, MO_32, MO_16)
+DO_LD1_2(ld1hdu, MO_64, MO_16)
+DO_LD1_2(ld1hds, MO_64, MO_16)
-DO_LD1_2(ld1ss, 2, 2)
-DO_LD1_2(ld1sdu, 3, 2)
-DO_LD1_2(ld1sds, 3, 2)
+DO_LD1_2(ld1ss, MO_32, MO_32)
+DO_LD1_2(ld1sdu, MO_64, MO_32)
+DO_LD1_2(ld1sds, MO_64, MO_32)
-DO_LD1_2(ld1dd, 3, 3)
+DO_LD1_2(ld1dd, MO_64, MO_64)
#undef DO_LD1_1
#undef DO_LD1_2
-/*
- * Common helpers for all contiguous 2,3,4-register predicated loads.
- */
-static void sve_ld2_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, int size, uintptr_t ra,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- ARMVectorReg scratch[2] = { };
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, ra);
- tlb_fn(env, &scratch[1], i, addr + size, ra);
- }
- i += size, pg >>= size;
- addr += 2 * size;
- } while (i & 15);
- }
-
- /* Wait until all exceptions have been raised to write back. */
- memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
- memcpy(&env->vfp.zregs[(rd + 1) & 31], &scratch[1], oprsz);
-}
-
-static void sve_ld3_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, int size, uintptr_t ra,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- ARMVectorReg scratch[3] = { };
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, ra);
- tlb_fn(env, &scratch[1], i, addr + size, ra);
- tlb_fn(env, &scratch[2], i, addr + 2 * size, ra);
- }
- i += size, pg >>= size;
- addr += 3 * size;
- } while (i & 15);
- }
-
- /* Wait until all exceptions have been raised to write back. */
- memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
- memcpy(&env->vfp.zregs[(rd + 1) & 31], &scratch[1], oprsz);
- memcpy(&env->vfp.zregs[(rd + 2) & 31], &scratch[2], oprsz);
-}
-
-static void sve_ld4_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, int size, uintptr_t ra,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- ARMVectorReg scratch[4] = { };
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, &scratch[0], i, addr, ra);
- tlb_fn(env, &scratch[1], i, addr + size, ra);
- tlb_fn(env, &scratch[2], i, addr + 2 * size, ra);
- tlb_fn(env, &scratch[3], i, addr + 3 * size, ra);
- }
- i += size, pg >>= size;
- addr += 4 * size;
- } while (i & 15);
- }
-
- /* Wait until all exceptions have been raised to write back. */
- memcpy(&env->vfp.zregs[rd], &scratch[0], oprsz);
- memcpy(&env->vfp.zregs[(rd + 1) & 31], &scratch[1], oprsz);
- memcpy(&env->vfp.zregs[(rd + 2) & 31], &scratch[2], oprsz);
- memcpy(&env->vfp.zregs[(rd + 3) & 31], &scratch[3], oprsz);
-}
-
#define DO_LDN_1(N) \
-void QEMU_FLATTEN HELPER(sve_ld##N##bb_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
-{ \
- sve_ld##N##_r(env, vg, addr, desc, 1, GETPC(), sve_ld1bb_tlb); \
+void HELPER(sve_ld##N##bb_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
+{ \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), MO_8, MO_8, N, \
+ sve_ld1bb_host, sve_ld1bb_tlb); \
}
-#define DO_LDN_2(N, SUFF, SIZE) \
-void QEMU_FLATTEN HELPER(sve_ld##N##SUFF##_le_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
+#define DO_LDN_2(N, SUFF, ESZ) \
+void HELPER(sve_ld##N##SUFF##_le_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
{ \
- sve_ld##N##_r(env, vg, addr, desc, SIZE, GETPC(), \
- sve_ld1##SUFF##_le_tlb); \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), ESZ, ESZ, N, \
+ sve_ld1##SUFF##_le_host, sve_ld1##SUFF##_le_tlb); \
} \
-void QEMU_FLATTEN HELPER(sve_ld##N##SUFF##_be_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
+void HELPER(sve_ld##N##SUFF##_be_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
{ \
- sve_ld##N##_r(env, vg, addr, desc, SIZE, GETPC(), \
- sve_ld1##SUFF##_be_tlb); \
+ sve_ldN_r(env, vg, addr, desc, GETPC(), ESZ, ESZ, N, \
+ sve_ld1##SUFF##_be_host, sve_ld1##SUFF##_be_tlb); \
}
DO_LDN_1(2)
DO_LDN_1(3)
DO_LDN_1(4)
-DO_LDN_2(2, hh, 2)
-DO_LDN_2(3, hh, 2)
-DO_LDN_2(4, hh, 2)
+DO_LDN_2(2, hh, MO_16)
+DO_LDN_2(3, hh, MO_16)
+DO_LDN_2(4, hh, MO_16)
-DO_LDN_2(2, ss, 4)
-DO_LDN_2(3, ss, 4)
-DO_LDN_2(4, ss, 4)
+DO_LDN_2(2, ss, MO_32)
+DO_LDN_2(3, ss, MO_32)
+DO_LDN_2(4, ss, MO_32)
-DO_LDN_2(2, dd, 8)
-DO_LDN_2(3, dd, 8)
-DO_LDN_2(4, dd, 8)
+DO_LDN_2(2, dd, MO_64)
+DO_LDN_2(3, dd, MO_64)
+DO_LDN_2(4, dd, MO_64)
#undef DO_LDN_1
#undef DO_LDN_2
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (11 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 12/18] target/arm: Use SVEContLdSt for multi-register contiguous loads Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-27 11:03 ` Peter Maydell
2020-04-22 4:33 ` [PATCH v3 14/18] target/arm: Use SVEContLdSt for contiguous stores Richard Henderson
` (5 subsequent siblings)
18 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
With sve_cont_ldst_pages, the differences between first-fault and no-fault
are minimal, so unify the routines. With cpu_probe_watchpoint, we are able
to make progress through pages with TLB_WATCHPOINT set when the watchpoint
does not actually fire.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 342 +++++++++++++++++++---------------------
1 file changed, 158 insertions(+), 184 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 9365e32646..3473b53928 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4101,18 +4101,6 @@ static intptr_t find_next_active(uint64_t *vg, intptr_t reg_off,
return reg_off;
}
-/*
- * Return the maximum offset <= @mem_max which is still within the page
- * referenced by @base + @mem_off.
- */
-static intptr_t max_for_page(target_ulong base, intptr_t mem_off,
- intptr_t mem_max)
-{
- target_ulong addr = base + mem_off;
- intptr_t split = -(intptr_t)(addr | TARGET_PAGE_MASK);
- return MIN(split, mem_max - mem_off) + mem_off;
-}
-
/*
* Resolve the guest virtual address to info->host and info->flags.
* If @nofault, return false if the page is invalid, otherwise
@@ -4435,19 +4423,6 @@ static void sve_cont_ldst_watchpoints(SVEContLdSt *info, CPUARMState *env,
#endif
}
-/*
- * The result of tlb_vaddr_to_host for user-only is just g2h(x),
- * which is always non-null. Elide the useless test.
- */
-static inline bool test_host_page(void *host)
-{
-#ifdef CONFIG_USER_ONLY
- return true;
-#else
- return likely(host != NULL);
-#endif
-}
-
/*
* Common helper for all contiguous 1,2,3,4-register predicated stores.
*/
@@ -4705,167 +4680,163 @@ static void record_fault(CPUARMState *env, uintptr_t i, uintptr_t oprsz)
}
/*
- * Common helper for all contiguous first-fault loads.
+ * Common helper for all contiguous no-fault and first-fault loads.
*/
-static void sve_ldff1_r(CPUARMState *env, void *vg, const target_ulong addr,
- uint32_t desc, const uintptr_t retaddr,
- const int esz, const int msz,
- sve_ldst1_host_fn *host_fn,
- sve_ldst1_tlb_fn *tlb_fn)
+static inline QEMU_ALWAYS_INLINE
+void sve_ldnfff1_r(CPUARMState *env, void *vg, const target_ulong addr,
+ uint32_t desc, const uintptr_t retaddr,
+ const int esz, const int msz, const SVEContFault fault,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
- const int mmu_idx = get_mmuidx(oi);
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
void *vd = &env->vfp.zregs[rd];
- const int diffsz = esz - msz;
const intptr_t reg_max = simd_oprsz(desc);
- const intptr_t mem_max = reg_max >> diffsz;
- intptr_t split, reg_off, mem_off, i;
+ intptr_t reg_off, mem_off, reg_last;
+ SVEContLdSt info;
+ int flags;
void *host;
- /* Skip to the first active element. */
- reg_off = find_next_active(vg, 0, reg_max, esz);
- if (unlikely(reg_off == reg_max)) {
+ /* Find the active elements. */
+ if (!sve_cont_ldst_elements(&info, addr, vg, reg_max, esz, 1 << msz)) {
/* The entire predicate was false; no load occurs. */
memset(vd, 0, reg_max);
return;
}
- mem_off = reg_off >> diffsz;
+ reg_off = info.reg_off_first[0];
- /*
- * If the (remaining) load is entirely within a single page, then:
- * For softmmu, and the tlb hits, then no faults will occur;
- * For user-only, either the first load will fault or none will.
- * We can thus perform the load directly to the destination and
- * Vd will be unmodified on any exception path.
- */
- split = max_for_page(addr, mem_off, mem_max);
- if (likely(split == mem_max)) {
- host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
- if (test_host_page(host)) {
- i = reg_off;
- host -= mem_off;
- do {
- host_fn(vd, i, host + (i >> diffsz));
- i = find_next_active(vg, i + (1 << esz), reg_max, esz);
- } while (i < reg_max);
- /* After any fault, zero any leading inactive elements. */
+ /* Probe the page(s). */
+ if (!sve_cont_ldst_pages(&info, fault, env, addr, MMU_DATA_LOAD, retaddr)) {
+ /* Fault on first element. */
+ tcg_debug_assert(fault == FAULT_NO);
+ memset(vd, 0, reg_max);
+ goto do_fault;
+ }
+
+ mem_off = info.mem_off_first[0];
+ flags = info.page[0].flags;
+
+ if (fault == FAULT_FIRST) {
+ /*
+ * Special handling of the first active element,
+ * if it crosses a page boundary or is MMIO.
+ */
+ bool is_split = mem_off == info.mem_off_split;
+ /* TODO: MTE check. */
+ if (unlikely(flags != 0) || unlikely(is_split)) {
+ /*
+ * Use the slow path for cross-page handling.
+ * Might trap for MMIO or watchpoints.
+ */
+ tlb_fn(env, vd, reg_off, addr + mem_off, retaddr);
+
+ /* After any fault, zero the other elements. */
swap_memzero(vd, reg_off);
- return;
+ reg_off += 1 << esz;
+ mem_off += 1 << msz;
+ swap_memzero(vd + reg_off, reg_max - reg_off);
+
+ if (is_split) {
+ goto second_page;
+ }
+ } else {
+ memset(vd, 0, reg_max);
+ }
+ } else {
+ memset(vd, 0, reg_max);
+ if (unlikely(mem_off == info.mem_off_split)) {
+ /* The first active element crosses a page boundary. */
+ flags |= info.page[1].flags;
+ if (unlikely(flags & TLB_MMIO)) {
+ /* Some page is MMIO, see below. */
+ goto do_fault;
+ }
+ if (unlikely(flags & TLB_WATCHPOINT) &&
+ (cpu_watchpoint_address_matches
+ (env_cpu(env), addr + mem_off, 1 << msz)
+ & BP_MEM_READ)) {
+ /* Watchpoint hit, see below. */
+ goto do_fault;
+ }
+ /* TODO: MTE check. */
+ /*
+ * Use the slow path for cross-page handling.
+ * This is RAM, without a watchpoint, and will not trap.
+ */
+ tlb_fn(env, vd, reg_off, addr + mem_off, retaddr);
+ goto second_page;
}
}
/*
- * Perform one normal read, which will fault or not.
- * But it is likely to bring the page into the tlb.
+ * From this point on, all memory operations are MemSingleNF.
+ *
+ * Per the MemSingleNF pseudocode, a no-fault load from Device memory
+ * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
+ * If you map non-RAM with Normal memory attributes and do a NF
+ * load then it should access the bus -- but doing so is illegal.
+ *
+ * While we do not have access to the memory attributes from the PTE
+ * to tell Device memory from Normal memory, we can validly assume that
+ * non-RAM has been mapped as Device memory. Thus we indicate fault
+ * on all MMIO.
+ *
+ * Similarly, CPU_BP breakpoints would raise exceptions, and so
+ * return (UNKNOWN, FAULT). For simplicity, we consider gdb and
+ * architectural breakpoints the same.
*/
- tlb_fn(env, vd, reg_off, addr + mem_off, retaddr);
+ if (unlikely(flags & TLB_MMIO)) {
+ goto do_fault;
+ }
- /* After any fault, zero any leading predicated false elts. */
- swap_memzero(vd, reg_off);
- mem_off += 1 << msz;
- reg_off += 1 << esz;
+ reg_last = info.reg_off_last[0];
+ host = info.page[0].host;
- /* Try again to read the balance of the page. */
- split = max_for_page(addr, mem_off - 1, mem_max);
- if (split >= (1 << msz)) {
- host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
- if (host) {
- host -= mem_off;
- do {
+ do {
+ uint64_t pg = *(uint64_t *)(vg + (reg_off >> 3));
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ if (unlikely(flags & TLB_WATCHPOINT) &&
+ (cpu_watchpoint_address_matches
+ (env_cpu(env), addr + mem_off, 1 << msz)
+ & BP_MEM_READ)) {
+ goto do_fault;
+ }
+ /* TODO: MTE check. */
host_fn(vd, reg_off, host + mem_off);
- reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- mem_off = reg_off >> diffsz;
- } while (split - mem_off >= (1 << msz));
- }
- }
-
- record_fault(env, reg_off, reg_max);
-}
-
-/*
- * Common helper for all contiguous no-fault loads.
- */
-static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
- uint32_t desc, const int esz, const int msz,
- sve_ldst1_host_fn *host_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- void *vd = &env->vfp.zregs[rd];
- const int diffsz = esz - msz;
- const intptr_t reg_max = simd_oprsz(desc);
- const intptr_t mem_max = reg_max >> diffsz;
- const int mmu_idx = cpu_mmu_index(env, false);
- intptr_t split, reg_off, mem_off;
- void *host;
-
-#ifdef CONFIG_USER_ONLY
- host = tlb_vaddr_to_host(env, addr, MMU_DATA_LOAD, mmu_idx);
- if (likely(page_check_range(addr, mem_max, PAGE_READ) == 0)) {
- /* The entire operation is valid and will not fault. */
- reg_off = 0;
- do {
- mem_off = reg_off >> diffsz;
- host_fn(vd, reg_off, host + mem_off);
+ }
reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- } while (reg_off < reg_max);
- return;
- }
-#endif
+ mem_off += 1 << msz;
+ } while (reg_off <= reg_last && (reg_off & 63));
+ } while (reg_off <= reg_last);
- /* There will be no fault, so we may modify in advance. */
- memset(vd, 0, reg_max);
-
- /* Skip to the first active element. */
- reg_off = find_next_active(vg, 0, reg_max, esz);
- if (unlikely(reg_off == reg_max)) {
- /* The entire predicate was false; no load occurs. */
- return;
- }
- mem_off = reg_off >> diffsz;
-
-#ifdef CONFIG_USER_ONLY
- if (page_check_range(addr + mem_off, 1 << msz, PAGE_READ) == 0) {
- /* At least one load is valid; take the rest of the page. */
- split = max_for_page(addr, mem_off + (1 << msz) - 1, mem_max);
- do {
- host_fn(vd, reg_off, host + mem_off);
- reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- mem_off = reg_off >> diffsz;
- } while (split - mem_off >= (1 << msz));
- }
-#else
/*
- * If the address is not in the TLB, we have no way to bring the
- * entry into the TLB without also risking a fault. Note that
- * the corollary is that we never load from an address not in RAM.
- *
- * This last is out of spec, in a weird corner case.
- * Per the MemNF/MemSingleNF pseudocode, a NF load from Device memory
- * must not actually hit the bus -- it returns UNKNOWN data instead.
- * But if you map non-RAM with Normal memory attributes and do a NF
- * load then it should access the bus. (Nobody ought actually do this
- * in the real world, obviously.)
- *
- * Then there are the annoying special cases with watchpoints...
- * TODO: Add a form of non-faulting loads using cc->tlb_fill(probe=true).
+ * MemSingleNF is allowed to fail for any reason. We have special
+ * code above to handle the first element crossing a page boundary.
+ * As an implementation choice, decline to handle a cross-page element
+ * in any other position.
*/
- host = tlb_vaddr_to_host(env, addr + mem_off, MMU_DATA_LOAD, mmu_idx);
- split = max_for_page(addr, mem_off, mem_max);
- if (host && split >= (1 << msz)) {
- host -= mem_off;
- do {
- host_fn(vd, reg_off, host + mem_off);
- reg_off += 1 << esz;
- reg_off = find_next_active(vg, reg_off, reg_max, esz);
- mem_off = reg_off >> diffsz;
- } while (split - mem_off >= (1 << msz));
+ reg_off = info.reg_off_split;
+ if (reg_off >= 0) {
+ goto do_fault;
}
-#endif
+ second_page:
+ reg_off = info.reg_off_first[1];
+ if (likely(reg_off < 0)) {
+ /* No active elements on the second page. All done. */
+ return;
+ }
+
+ /*
+ * MemSingleNF is allowed to fail for any reason. As an implementation
+ * choice, decline to handle elements on the second page. This should
+ * be low frequency as the guest walks through memory -- the next
+ * iteration of the guest's loop should be aligned on the page boundary,
+ * and then all following iterations will stay aligned.
+ */
+
+ do_fault:
record_fault(env, reg_off, reg_max);
}
@@ -4873,58 +4844,61 @@ static void sve_ldnf1_r(CPUARMState *env, void *vg, const target_ulong addr,
void HELPER(sve_ldff1##PART##_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldff1_r(env, vg, addr, desc, GETPC(), ESZ, 0, \
- sve_ld1##PART##_host, sve_ld1##PART##_tlb); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MO_8, FAULT_FIRST, \
+ sve_ld1##PART##_host, sve_ld1##PART##_tlb); \
} \
void HELPER(sve_ldnf1##PART##_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldnf1_r(env, vg, addr, desc, ESZ, 0, sve_ld1##PART##_host); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MO_8, FAULT_NO, \
+ sve_ld1##PART##_host, sve_ld1##PART##_tlb); \
}
#define DO_LDFF1_LDNF1_2(PART, ESZ, MSZ) \
void HELPER(sve_ldff1##PART##_le_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, \
- sve_ld1##PART##_le_host, sve_ld1##PART##_le_tlb); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, FAULT_FIRST, \
+ sve_ld1##PART##_le_host, sve_ld1##PART##_le_tlb); \
} \
void HELPER(sve_ldnf1##PART##_le_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldnf1_r(env, vg, addr, desc, ESZ, MSZ, sve_ld1##PART##_le_host); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, FAULT_NO, \
+ sve_ld1##PART##_le_host, sve_ld1##PART##_le_tlb); \
} \
void HELPER(sve_ldff1##PART##_be_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, \
- sve_ld1##PART##_be_host, sve_ld1##PART##_be_tlb); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, FAULT_FIRST, \
+ sve_ld1##PART##_be_host, sve_ld1##PART##_be_tlb); \
} \
void HELPER(sve_ldnf1##PART##_be_r)(CPUARMState *env, void *vg, \
target_ulong addr, uint32_t desc) \
{ \
- sve_ldnf1_r(env, vg, addr, desc, ESZ, MSZ, sve_ld1##PART##_be_host); \
+ sve_ldnfff1_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, FAULT_NO, \
+ sve_ld1##PART##_be_host, sve_ld1##PART##_be_tlb); \
}
-DO_LDFF1_LDNF1_1(bb, 0)
-DO_LDFF1_LDNF1_1(bhu, 1)
-DO_LDFF1_LDNF1_1(bhs, 1)
-DO_LDFF1_LDNF1_1(bsu, 2)
-DO_LDFF1_LDNF1_1(bss, 2)
-DO_LDFF1_LDNF1_1(bdu, 3)
-DO_LDFF1_LDNF1_1(bds, 3)
+DO_LDFF1_LDNF1_1(bb, MO_8)
+DO_LDFF1_LDNF1_1(bhu, MO_16)
+DO_LDFF1_LDNF1_1(bhs, MO_16)
+DO_LDFF1_LDNF1_1(bsu, MO_32)
+DO_LDFF1_LDNF1_1(bss, MO_32)
+DO_LDFF1_LDNF1_1(bdu, MO_64)
+DO_LDFF1_LDNF1_1(bds, MO_64)
-DO_LDFF1_LDNF1_2(hh, 1, 1)
-DO_LDFF1_LDNF1_2(hsu, 2, 1)
-DO_LDFF1_LDNF1_2(hss, 2, 1)
-DO_LDFF1_LDNF1_2(hdu, 3, 1)
-DO_LDFF1_LDNF1_2(hds, 3, 1)
+DO_LDFF1_LDNF1_2(hh, MO_16, MO_16)
+DO_LDFF1_LDNF1_2(hsu, MO_32, MO_16)
+DO_LDFF1_LDNF1_2(hss, MO_32, MO_16)
+DO_LDFF1_LDNF1_2(hdu, MO_64, MO_16)
+DO_LDFF1_LDNF1_2(hds, MO_64, MO_16)
-DO_LDFF1_LDNF1_2(ss, 2, 2)
-DO_LDFF1_LDNF1_2(sdu, 3, 2)
-DO_LDFF1_LDNF1_2(sds, 3, 2)
+DO_LDFF1_LDNF1_2(ss, MO_32, MO_32)
+DO_LDFF1_LDNF1_2(sdu, MO_64, MO_32)
+DO_LDFF1_LDNF1_2(sds, MO_64, MO_32)
-DO_LDFF1_LDNF1_2(dd, 3, 3)
+DO_LDFF1_LDNF1_2(dd, MO_64, MO_64)
#undef DO_LDFF1_LDNF1_1
#undef DO_LDFF1_LDNF1_2
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 14/18] target/arm: Use SVEContLdSt for contiguous stores
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (12 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 15/18] target/arm: Reuse sve_probe_page for gather first-fault loads Richard Henderson
` (4 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Follow the model set up for contiguous loads. This handles
watchpoints correctly for contiguous stores, recognizing the
exception before any changes to memory.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 285 ++++++++++++++++++++++------------------
1 file changed, 159 insertions(+), 126 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 3473b53928..9389c7c76d 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -3995,6 +3995,10 @@ static void sve_##NAME##_host(void *vd, intptr_t reg_off, void *host) \
*(TYPEE *)(vd + H(reg_off)) = val; \
}
+#define DO_ST_HOST(NAME, H, TYPEE, TYPEM, HOST) \
+static void sve_##NAME##_host(void *vd, intptr_t reg_off, void *host) \
+{ HOST(host, (TYPEM)*(TYPEE *)(vd + H(reg_off))); }
+
#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, TLB) \
static void sve_##NAME##_tlb(CPUARMState *env, void *vd, intptr_t reg_off, \
target_ulong addr, uintptr_t ra) \
@@ -4022,6 +4026,7 @@ DO_LD_PRIM_1(ld1bdu, , uint64_t, uint8_t)
DO_LD_PRIM_1(ld1bds, , uint64_t, int8_t)
#define DO_ST_PRIM_1(NAME, H, TE, TM) \
+ DO_ST_HOST(st1##NAME, H, TE, TM, stb_p) \
DO_ST_TLB(st1##NAME, H, TE, TM, cpu_stb_data_ra)
DO_ST_PRIM_1(bb, H1, uint8_t, uint8_t)
@@ -4036,6 +4041,8 @@ DO_ST_PRIM_1(bd, , uint64_t, uint8_t)
DO_LD_TLB(ld1##NAME##_le, H, TE, TM, cpu_##LD##_le_data_ra)
#define DO_ST_PRIM_2(NAME, H, TE, TM, ST) \
+ DO_ST_HOST(st1##NAME##_be, H, TE, TM, ST##_be_p) \
+ DO_ST_HOST(st1##NAME##_le, H, TE, TM, ST##_le_p) \
DO_ST_TLB(st1##NAME##_be, H, TE, TM, cpu_##ST##_be_data_ra) \
DO_ST_TLB(st1##NAME##_le, H, TE, TM, cpu_##ST##_le_data_ra)
@@ -4904,151 +4911,177 @@ DO_LDFF1_LDNF1_2(dd, MO_64, MO_64)
#undef DO_LDFF1_LDNF1_2
/*
- * Common helpers for all contiguous 1,2,3,4-register predicated stores.
+ * Common helper for all contiguous 1,2,3,4-register predicated stores.
*/
-static void sve_st1_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, const uintptr_t ra,
- const int esize, const int msize,
- sve_ldst1_tlb_fn *tlb_fn)
+
+static inline QEMU_ALWAYS_INLINE
+void sve_stN_r(CPUARMState *env, uint64_t *vg, target_ulong addr, uint32_t desc,
+ const uintptr_t retaddr, const int esz,
+ const int msz, const int N,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- void *vd = &env->vfp.zregs[rd];
+ const intptr_t reg_max = simd_oprsz(desc);
+ intptr_t reg_off, reg_last, mem_off;
+ SVEContLdSt info;
+ void *host;
+ int i, flags;
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, vd, i, addr, ra);
+ /* Find the active elements. */
+ if (!sve_cont_ldst_elements(&info, addr, vg, reg_max, esz, N << msz)) {
+ /* The entire predicate was false; no store occurs. */
+ return;
+ }
+
+ /* Probe the page(s). Exit with exception for any invalid page. */
+ sve_cont_ldst_pages(&info, FAULT_ALL, env, addr, MMU_DATA_STORE, retaddr);
+
+ /* Handle watchpoints for all active elements. */
+ sve_cont_ldst_watchpoints(&info, env, vg, addr, 1 << esz, N << msz,
+ BP_MEM_WRITE, retaddr);
+
+ /* TODO: MTE check. */
+
+ flags = info.page[0].flags | info.page[1].flags;
+ if (unlikely(flags != 0)) {
+#ifdef CONFIG_USER_ONLY
+ g_assert_not_reached();
+#else
+ /*
+ * At least one page includes MMIO.
+ * Any bus operation can fail with cpu_transaction_failed,
+ * which for ARM will raise SyncExternal. We cannot avoid
+ * this fault and will leave with the store incomplete.
+ */
+ mem_off = info.mem_off_first[0];
+ reg_off = info.reg_off_first[0];
+ reg_last = info.reg_off_last[1];
+ if (reg_last < 0) {
+ reg_last = info.reg_off_split;
+ if (reg_last < 0) {
+ reg_last = info.reg_off_last[0];
}
- i += esize, pg >>= esize;
- addr += msize;
- } while (i & 15);
+ }
+
+ do {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ for (i = 0; i < N; ++i) {
+ tlb_fn(env, &env->vfp.zregs[(rd + i) & 31], reg_off,
+ addr + mem_off + (i << msz), retaddr);
+ }
+ }
+ reg_off += 1 << esz;
+ mem_off += N << msz;
+ } while (reg_off & 63);
+ } while (reg_off <= reg_last);
+ return;
+#endif
+ }
+
+ mem_off = info.mem_off_first[0];
+ reg_off = info.reg_off_first[0];
+ reg_last = info.reg_off_last[0];
+ host = info.page[0].host;
+
+ while (reg_off <= reg_last) {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ for (i = 0; i < N; ++i) {
+ host_fn(&env->vfp.zregs[(rd + i) & 31], reg_off,
+ host + mem_off + (i << msz));
+ }
+ }
+ reg_off += 1 << esz;
+ mem_off += N << msz;
+ } while (reg_off <= reg_last && (reg_off & 63));
+ }
+
+ /*
+ * Use the slow path to manage the cross-page misalignment.
+ * But we know this is RAM and cannot trap.
+ */
+ mem_off = info.mem_off_split;
+ if (unlikely(mem_off >= 0)) {
+ reg_off = info.reg_off_split;
+ for (i = 0; i < N; ++i) {
+ tlb_fn(env, &env->vfp.zregs[(rd + i) & 31], reg_off,
+ addr + mem_off + (i << msz), retaddr);
+ }
+ }
+
+ mem_off = info.mem_off_first[1];
+ if (unlikely(mem_off >= 0)) {
+ reg_off = info.reg_off_first[1];
+ reg_last = info.reg_off_last[1];
+ host = info.page[1].host;
+
+ do {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if ((pg >> (reg_off & 63)) & 1) {
+ for (i = 0; i < N; ++i) {
+ host_fn(&env->vfp.zregs[(rd + i) & 31], reg_off,
+ host + mem_off + (i << msz));
+ }
+ }
+ reg_off += 1 << esz;
+ mem_off += N << msz;
+ } while (reg_off & 63);
+ } while (reg_off <= reg_last);
}
}
-static void sve_st2_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, const uintptr_t ra,
- const int esize, const int msize,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- void *d1 = &env->vfp.zregs[rd];
- void *d2 = &env->vfp.zregs[(rd + 1) & 31];
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, d1, i, addr, ra);
- tlb_fn(env, d2, i, addr + msize, ra);
- }
- i += esize, pg >>= esize;
- addr += 2 * msize;
- } while (i & 15);
- }
-}
-
-static void sve_st3_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, const uintptr_t ra,
- const int esize, const int msize,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- void *d1 = &env->vfp.zregs[rd];
- void *d2 = &env->vfp.zregs[(rd + 1) & 31];
- void *d3 = &env->vfp.zregs[(rd + 2) & 31];
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, d1, i, addr, ra);
- tlb_fn(env, d2, i, addr + msize, ra);
- tlb_fn(env, d3, i, addr + 2 * msize, ra);
- }
- i += esize, pg >>= esize;
- addr += 3 * msize;
- } while (i & 15);
- }
-}
-
-static void sve_st4_r(CPUARMState *env, void *vg, target_ulong addr,
- uint32_t desc, const uintptr_t ra,
- const int esize, const int msize,
- sve_ldst1_tlb_fn *tlb_fn)
-{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
- intptr_t i, oprsz = simd_oprsz(desc);
- void *d1 = &env->vfp.zregs[rd];
- void *d2 = &env->vfp.zregs[(rd + 1) & 31];
- void *d3 = &env->vfp.zregs[(rd + 2) & 31];
- void *d4 = &env->vfp.zregs[(rd + 3) & 31];
-
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
- do {
- if (pg & 1) {
- tlb_fn(env, d1, i, addr, ra);
- tlb_fn(env, d2, i, addr + msize, ra);
- tlb_fn(env, d3, i, addr + 2 * msize, ra);
- tlb_fn(env, d4, i, addr + 3 * msize, ra);
- }
- i += esize, pg >>= esize;
- addr += 4 * msize;
- } while (i & 15);
- }
-}
-
-#define DO_STN_1(N, NAME, ESIZE) \
-void QEMU_FLATTEN HELPER(sve_st##N##NAME##_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
+#define DO_STN_1(N, NAME, ESZ) \
+void HELPER(sve_st##N##NAME##_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
{ \
- sve_st##N##_r(env, vg, addr, desc, GETPC(), ESIZE, 1, \
- sve_st1##NAME##_tlb); \
+ sve_stN_r(env, vg, addr, desc, GETPC(), ESZ, MO_8, N, \
+ sve_st1##NAME##_host, sve_st1##NAME##_tlb); \
}
-#define DO_STN_2(N, NAME, ESIZE, MSIZE) \
-void QEMU_FLATTEN HELPER(sve_st##N##NAME##_le_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
+#define DO_STN_2(N, NAME, ESZ, MSZ) \
+void HELPER(sve_st##N##NAME##_le_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
{ \
- sve_st##N##_r(env, vg, addr, desc, GETPC(), ESIZE, MSIZE, \
- sve_st1##NAME##_le_tlb); \
+ sve_stN_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, N, \
+ sve_st1##NAME##_le_host, sve_st1##NAME##_le_tlb); \
} \
-void QEMU_FLATTEN HELPER(sve_st##N##NAME##_be_r) \
- (CPUARMState *env, void *vg, target_ulong addr, uint32_t desc) \
+void HELPER(sve_st##N##NAME##_be_r)(CPUARMState *env, void *vg, \
+ target_ulong addr, uint32_t desc) \
{ \
- sve_st##N##_r(env, vg, addr, desc, GETPC(), ESIZE, MSIZE, \
- sve_st1##NAME##_be_tlb); \
+ sve_stN_r(env, vg, addr, desc, GETPC(), ESZ, MSZ, N, \
+ sve_st1##NAME##_be_host, sve_st1##NAME##_be_tlb); \
}
-DO_STN_1(1, bb, 1)
-DO_STN_1(1, bh, 2)
-DO_STN_1(1, bs, 4)
-DO_STN_1(1, bd, 8)
-DO_STN_1(2, bb, 1)
-DO_STN_1(3, bb, 1)
-DO_STN_1(4, bb, 1)
+DO_STN_1(1, bb, MO_8)
+DO_STN_1(1, bh, MO_16)
+DO_STN_1(1, bs, MO_32)
+DO_STN_1(1, bd, MO_64)
+DO_STN_1(2, bb, MO_8)
+DO_STN_1(3, bb, MO_8)
+DO_STN_1(4, bb, MO_8)
-DO_STN_2(1, hh, 2, 2)
-DO_STN_2(1, hs, 4, 2)
-DO_STN_2(1, hd, 8, 2)
-DO_STN_2(2, hh, 2, 2)
-DO_STN_2(3, hh, 2, 2)
-DO_STN_2(4, hh, 2, 2)
+DO_STN_2(1, hh, MO_16, MO_16)
+DO_STN_2(1, hs, MO_32, MO_16)
+DO_STN_2(1, hd, MO_64, MO_16)
+DO_STN_2(2, hh, MO_16, MO_16)
+DO_STN_2(3, hh, MO_16, MO_16)
+DO_STN_2(4, hh, MO_16, MO_16)
-DO_STN_2(1, ss, 4, 4)
-DO_STN_2(1, sd, 8, 4)
-DO_STN_2(2, ss, 4, 4)
-DO_STN_2(3, ss, 4, 4)
-DO_STN_2(4, ss, 4, 4)
+DO_STN_2(1, ss, MO_32, MO_32)
+DO_STN_2(1, sd, MO_64, MO_32)
+DO_STN_2(2, ss, MO_32, MO_32)
+DO_STN_2(3, ss, MO_32, MO_32)
+DO_STN_2(4, ss, MO_32, MO_32)
-DO_STN_2(1, dd, 8, 8)
-DO_STN_2(2, dd, 8, 8)
-DO_STN_2(3, dd, 8, 8)
-DO_STN_2(4, dd, 8, 8)
+DO_STN_2(1, dd, MO_64, MO_64)
+DO_STN_2(2, dd, MO_64, MO_64)
+DO_STN_2(3, dd, MO_64, MO_64)
+DO_STN_2(4, dd, MO_64, MO_64)
#undef DO_STN_1
#undef DO_STN_2
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 15/18] target/arm: Reuse sve_probe_page for gather first-fault loads
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (13 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 14/18] target/arm: Use SVEContLdSt for contiguous stores Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 16/18] target/arm: Reuse sve_probe_page for scatter stores Richard Henderson
` (3 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
This avoids the need for a separate set of helpers to implement
no-fault semantics, and will enable MTE in the future.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 323 ++++++++++++++++------------------------
1 file changed, 127 insertions(+), 196 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 9389c7c76d..6229ea65c0 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -5250,231 +5250,162 @@ DO_LD1_ZPZ_D(dd_be, zd)
/* First fault loads with a vector index. */
-/* Load one element into VD+REG_OFF from (ENV,VADDR) without faulting.
- * The controlling predicate is known to be true. Return true if the
- * load was successful.
- */
-typedef bool sve_ld1_nf_fn(CPUARMState *env, void *vd, intptr_t reg_off,
- target_ulong vaddr, int mmu_idx);
-
-#ifdef CONFIG_SOFTMMU
-#define DO_LD_NF(NAME, H, TYPEE, TYPEM, HOST) \
-static bool sve_ld##NAME##_nf(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, int mmu_idx) \
-{ \
- target_ulong next_page = -(addr | TARGET_PAGE_MASK); \
- if (likely(next_page - addr >= sizeof(TYPEM))) { \
- void *host = tlb_vaddr_to_host(env, addr, MMU_DATA_LOAD, mmu_idx); \
- if (likely(host)) { \
- TYPEM val = HOST(host); \
- *(TYPEE *)(vd + H(reg_off)) = val; \
- return true; \
- } \
- } \
- return false; \
-}
-#else
-#define DO_LD_NF(NAME, H, TYPEE, TYPEM, HOST) \
-static bool sve_ld##NAME##_nf(CPUARMState *env, void *vd, intptr_t reg_off, \
- target_ulong addr, int mmu_idx) \
-{ \
- if (likely(page_check_range(addr, sizeof(TYPEM), PAGE_READ))) { \
- TYPEM val = HOST(g2h(addr)); \
- *(TYPEE *)(vd + H(reg_off)) = val; \
- return true; \
- } \
- return false; \
-}
-#endif
-
-DO_LD_NF(bsu, H1_4, uint32_t, uint8_t, ldub_p)
-DO_LD_NF(bss, H1_4, uint32_t, int8_t, ldsb_p)
-DO_LD_NF(bdu, , uint64_t, uint8_t, ldub_p)
-DO_LD_NF(bds, , uint64_t, int8_t, ldsb_p)
-
-DO_LD_NF(hsu_le, H1_4, uint32_t, uint16_t, lduw_le_p)
-DO_LD_NF(hss_le, H1_4, uint32_t, int16_t, ldsw_le_p)
-DO_LD_NF(hsu_be, H1_4, uint32_t, uint16_t, lduw_be_p)
-DO_LD_NF(hss_be, H1_4, uint32_t, int16_t, ldsw_be_p)
-DO_LD_NF(hdu_le, , uint64_t, uint16_t, lduw_le_p)
-DO_LD_NF(hds_le, , uint64_t, int16_t, ldsw_le_p)
-DO_LD_NF(hdu_be, , uint64_t, uint16_t, lduw_be_p)
-DO_LD_NF(hds_be, , uint64_t, int16_t, ldsw_be_p)
-
-DO_LD_NF(ss_le, H1_4, uint32_t, uint32_t, ldl_le_p)
-DO_LD_NF(ss_be, H1_4, uint32_t, uint32_t, ldl_be_p)
-DO_LD_NF(sdu_le, , uint64_t, uint32_t, ldl_le_p)
-DO_LD_NF(sds_le, , uint64_t, int32_t, ldl_le_p)
-DO_LD_NF(sdu_be, , uint64_t, uint32_t, ldl_be_p)
-DO_LD_NF(sds_be, , uint64_t, int32_t, ldl_be_p)
-
-DO_LD_NF(dd_le, , uint64_t, uint64_t, ldq_le_p)
-DO_LD_NF(dd_be, , uint64_t, uint64_t, ldq_be_p)
-
/*
- * Common helper for all gather first-faulting loads.
+ * Common helpers for all gather first-faulting loads.
*/
-static inline void sve_ldff1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn,
- sve_ld1_nf_fn *nonfault_fn)
+
+static inline QEMU_ALWAYS_INLINE
+void sve_ldff1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
+ target_ulong base, uint32_t desc, uintptr_t retaddr,
+ const int esz, const int msz, zreg_off_fn *off_fn,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
- const int mmu_idx = get_mmuidx(oi);
+ const int mmu_idx = cpu_mmu_index(env, false);
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t reg_off, reg_max = simd_oprsz(desc);
- target_ulong addr;
+ const int esize = 1 << esz;
+ const int msize = 1 << msz;
+ const intptr_t reg_max = simd_oprsz(desc);
+ intptr_t reg_off;
+ SVEHostPage info;
+ target_ulong addr, in_page;
/* Skip to the first true predicate. */
- reg_off = find_next_active(vg, 0, reg_max, MO_32);
- if (likely(reg_off < reg_max)) {
- /* Perform one normal read, which will fault or not. */
- addr = off_fn(vm, reg_off);
- addr = base + (addr << scale);
- tlb_fn(env, vd, reg_off, addr, ra);
-
- /* The rest of the reads will be non-faulting. */
+ reg_off = find_next_active(vg, 0, reg_max, esz);
+ if (unlikely(reg_off >= reg_max)) {
+ /* The entire predicate was false; no load occurs. */
+ memset(vd, 0, reg_max);
+ return;
}
- /* After any fault, zero the leading predicated false elements. */
+ /*
+ * Probe the first element, allowing faults.
+ */
+ addr = base + (off_fn(vm, reg_off) << scale);
+ tlb_fn(env, vd, reg_off, addr, retaddr);
+
+ /* After any fault, zero the other elements. */
swap_memzero(vd, reg_off);
+ reg_off += esize;
+ swap_memzero(vd + reg_off, reg_max - reg_off);
- while (likely((reg_off += 4) < reg_max)) {
- uint64_t pg = *(uint64_t *)(vg + (reg_off >> 6) * 8);
- if (likely((pg >> (reg_off & 63)) & 1)) {
- addr = off_fn(vm, reg_off);
- addr = base + (addr << scale);
- if (!nonfault_fn(env, vd, reg_off, addr, mmu_idx)) {
- record_fault(env, reg_off, reg_max);
- break;
+ /*
+ * Probe the remaining elements, not allowing faults.
+ */
+ while (reg_off < reg_max) {
+ uint64_t pg = vg[reg_off >> 6];
+ do {
+ if (likely((pg >> (reg_off & 63)) & 1)) {
+ addr = base + (off_fn(vm, reg_off) << scale);
+ in_page = -(addr | TARGET_PAGE_MASK);
+
+ if (unlikely(in_page < msize)) {
+ /* Stop if the element crosses a page boundary. */
+ goto fault;
+ }
+
+ sve_probe_page(&info, true, env, addr, 0, MMU_DATA_LOAD,
+ mmu_idx, retaddr);
+ if (unlikely(info.flags & (TLB_INVALID_MASK | TLB_MMIO))) {
+ goto fault;
+ }
+ if (unlikely(info.flags & TLB_WATCHPOINT) &&
+ (cpu_watchpoint_address_matches
+ (env_cpu(env), addr, msize) & BP_MEM_READ)) {
+ goto fault;
+ }
+ /* TODO: MTE check. */
+
+ host_fn(vd, reg_off, info.host);
}
- } else {
- *(uint32_t *)(vd + H1_4(reg_off)) = 0;
- }
+ reg_off += esize;
+ } while (reg_off & 63);
}
+ return;
+
+ fault:
+ record_fault(env, reg_off, reg_max);
}
-static inline void sve_ldff1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn,
- sve_ld1_nf_fn *nonfault_fn)
-{
- const TCGMemOpIdx oi = extract32(desc, SIMD_DATA_SHIFT, MEMOPIDX_SHIFT);
- const int mmu_idx = get_mmuidx(oi);
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t reg_off, reg_max = simd_oprsz(desc);
- target_ulong addr;
-
- /* Skip to the first true predicate. */
- reg_off = find_next_active(vg, 0, reg_max, MO_64);
- if (likely(reg_off < reg_max)) {
- /* Perform one normal read, which will fault or not. */
- addr = off_fn(vm, reg_off);
- addr = base + (addr << scale);
- tlb_fn(env, vd, reg_off, addr, ra);
-
- /* The rest of the reads will be non-faulting. */
- }
-
- /* After any fault, zero the leading predicated false elements. */
- swap_memzero(vd, reg_off);
-
- while (likely((reg_off += 8) < reg_max)) {
- uint8_t pg = *(uint8_t *)(vg + H1(reg_off >> 3));
- if (likely(pg & 1)) {
- addr = off_fn(vm, reg_off);
- addr = base + (addr << scale);
- if (!nonfault_fn(env, vd, reg_off, addr, mmu_idx)) {
- record_fault(env, reg_off, reg_max);
- break;
- }
- } else {
- *(uint64_t *)(vd + reg_off) = 0;
- }
- }
+#define DO_LDFF1_ZPZ_S(MEM, OFS, MSZ) \
+void HELPER(sve_ldff##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_ldff1_z(env, vd, vg, vm, base, desc, GETPC(), MO_32, MSZ, \
+ off_##OFS##_s, sve_ld1##MEM##_host, sve_ld1##MEM##_tlb); \
}
-#define DO_LDFF1_ZPZ_S(MEM, OFS) \
-void HELPER(sve_ldff##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_ldff1_zs(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_s, sve_ld1##MEM##_tlb, sve_ld##MEM##_nf); \
+#define DO_LDFF1_ZPZ_D(MEM, OFS, MSZ) \
+void HELPER(sve_ldff##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_ldff1_z(env, vd, vg, vm, base, desc, GETPC(), MO_64, MSZ, \
+ off_##OFS##_d, sve_ld1##MEM##_host, sve_ld1##MEM##_tlb); \
}
-#define DO_LDFF1_ZPZ_D(MEM, OFS) \
-void HELPER(sve_ldff##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_ldff1_zd(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_d, sve_ld1##MEM##_tlb, sve_ld##MEM##_nf); \
-}
+DO_LDFF1_ZPZ_S(bsu, zsu, MO_8)
+DO_LDFF1_ZPZ_S(bsu, zss, MO_8)
+DO_LDFF1_ZPZ_D(bdu, zsu, MO_8)
+DO_LDFF1_ZPZ_D(bdu, zss, MO_8)
+DO_LDFF1_ZPZ_D(bdu, zd, MO_8)
-DO_LDFF1_ZPZ_S(bsu, zsu)
-DO_LDFF1_ZPZ_S(bsu, zss)
-DO_LDFF1_ZPZ_D(bdu, zsu)
-DO_LDFF1_ZPZ_D(bdu, zss)
-DO_LDFF1_ZPZ_D(bdu, zd)
+DO_LDFF1_ZPZ_S(bss, zsu, MO_8)
+DO_LDFF1_ZPZ_S(bss, zss, MO_8)
+DO_LDFF1_ZPZ_D(bds, zsu, MO_8)
+DO_LDFF1_ZPZ_D(bds, zss, MO_8)
+DO_LDFF1_ZPZ_D(bds, zd, MO_8)
-DO_LDFF1_ZPZ_S(bss, zsu)
-DO_LDFF1_ZPZ_S(bss, zss)
-DO_LDFF1_ZPZ_D(bds, zsu)
-DO_LDFF1_ZPZ_D(bds, zss)
-DO_LDFF1_ZPZ_D(bds, zd)
+DO_LDFF1_ZPZ_S(hsu_le, zsu, MO_16)
+DO_LDFF1_ZPZ_S(hsu_le, zss, MO_16)
+DO_LDFF1_ZPZ_D(hdu_le, zsu, MO_16)
+DO_LDFF1_ZPZ_D(hdu_le, zss, MO_16)
+DO_LDFF1_ZPZ_D(hdu_le, zd, MO_16)
-DO_LDFF1_ZPZ_S(hsu_le, zsu)
-DO_LDFF1_ZPZ_S(hsu_le, zss)
-DO_LDFF1_ZPZ_D(hdu_le, zsu)
-DO_LDFF1_ZPZ_D(hdu_le, zss)
-DO_LDFF1_ZPZ_D(hdu_le, zd)
+DO_LDFF1_ZPZ_S(hsu_be, zsu, MO_16)
+DO_LDFF1_ZPZ_S(hsu_be, zss, MO_16)
+DO_LDFF1_ZPZ_D(hdu_be, zsu, MO_16)
+DO_LDFF1_ZPZ_D(hdu_be, zss, MO_16)
+DO_LDFF1_ZPZ_D(hdu_be, zd, MO_16)
-DO_LDFF1_ZPZ_S(hsu_be, zsu)
-DO_LDFF1_ZPZ_S(hsu_be, zss)
-DO_LDFF1_ZPZ_D(hdu_be, zsu)
-DO_LDFF1_ZPZ_D(hdu_be, zss)
-DO_LDFF1_ZPZ_D(hdu_be, zd)
+DO_LDFF1_ZPZ_S(hss_le, zsu, MO_16)
+DO_LDFF1_ZPZ_S(hss_le, zss, MO_16)
+DO_LDFF1_ZPZ_D(hds_le, zsu, MO_16)
+DO_LDFF1_ZPZ_D(hds_le, zss, MO_16)
+DO_LDFF1_ZPZ_D(hds_le, zd, MO_16)
-DO_LDFF1_ZPZ_S(hss_le, zsu)
-DO_LDFF1_ZPZ_S(hss_le, zss)
-DO_LDFF1_ZPZ_D(hds_le, zsu)
-DO_LDFF1_ZPZ_D(hds_le, zss)
-DO_LDFF1_ZPZ_D(hds_le, zd)
+DO_LDFF1_ZPZ_S(hss_be, zsu, MO_16)
+DO_LDFF1_ZPZ_S(hss_be, zss, MO_16)
+DO_LDFF1_ZPZ_D(hds_be, zsu, MO_16)
+DO_LDFF1_ZPZ_D(hds_be, zss, MO_16)
+DO_LDFF1_ZPZ_D(hds_be, zd, MO_16)
-DO_LDFF1_ZPZ_S(hss_be, zsu)
-DO_LDFF1_ZPZ_S(hss_be, zss)
-DO_LDFF1_ZPZ_D(hds_be, zsu)
-DO_LDFF1_ZPZ_D(hds_be, zss)
-DO_LDFF1_ZPZ_D(hds_be, zd)
+DO_LDFF1_ZPZ_S(ss_le, zsu, MO_32)
+DO_LDFF1_ZPZ_S(ss_le, zss, MO_32)
+DO_LDFF1_ZPZ_D(sdu_le, zsu, MO_32)
+DO_LDFF1_ZPZ_D(sdu_le, zss, MO_32)
+DO_LDFF1_ZPZ_D(sdu_le, zd, MO_32)
-DO_LDFF1_ZPZ_S(ss_le, zsu)
-DO_LDFF1_ZPZ_S(ss_le, zss)
-DO_LDFF1_ZPZ_D(sdu_le, zsu)
-DO_LDFF1_ZPZ_D(sdu_le, zss)
-DO_LDFF1_ZPZ_D(sdu_le, zd)
+DO_LDFF1_ZPZ_S(ss_be, zsu, MO_32)
+DO_LDFF1_ZPZ_S(ss_be, zss, MO_32)
+DO_LDFF1_ZPZ_D(sdu_be, zsu, MO_32)
+DO_LDFF1_ZPZ_D(sdu_be, zss, MO_32)
+DO_LDFF1_ZPZ_D(sdu_be, zd, MO_32)
-DO_LDFF1_ZPZ_S(ss_be, zsu)
-DO_LDFF1_ZPZ_S(ss_be, zss)
-DO_LDFF1_ZPZ_D(sdu_be, zsu)
-DO_LDFF1_ZPZ_D(sdu_be, zss)
-DO_LDFF1_ZPZ_D(sdu_be, zd)
+DO_LDFF1_ZPZ_D(sds_le, zsu, MO_32)
+DO_LDFF1_ZPZ_D(sds_le, zss, MO_32)
+DO_LDFF1_ZPZ_D(sds_le, zd, MO_32)
-DO_LDFF1_ZPZ_D(sds_le, zsu)
-DO_LDFF1_ZPZ_D(sds_le, zss)
-DO_LDFF1_ZPZ_D(sds_le, zd)
+DO_LDFF1_ZPZ_D(sds_be, zsu, MO_32)
+DO_LDFF1_ZPZ_D(sds_be, zss, MO_32)
+DO_LDFF1_ZPZ_D(sds_be, zd, MO_32)
-DO_LDFF1_ZPZ_D(sds_be, zsu)
-DO_LDFF1_ZPZ_D(sds_be, zss)
-DO_LDFF1_ZPZ_D(sds_be, zd)
+DO_LDFF1_ZPZ_D(dd_le, zsu, MO_64)
+DO_LDFF1_ZPZ_D(dd_le, zss, MO_64)
+DO_LDFF1_ZPZ_D(dd_le, zd, MO_64)
-DO_LDFF1_ZPZ_D(dd_le, zsu)
-DO_LDFF1_ZPZ_D(dd_le, zss)
-DO_LDFF1_ZPZ_D(dd_le, zd)
-
-DO_LDFF1_ZPZ_D(dd_be, zsu)
-DO_LDFF1_ZPZ_D(dd_be, zss)
-DO_LDFF1_ZPZ_D(dd_be, zd)
+DO_LDFF1_ZPZ_D(dd_be, zsu, MO_64)
+DO_LDFF1_ZPZ_D(dd_be, zss, MO_64)
+DO_LDFF1_ZPZ_D(dd_be, zd, MO_64)
/* Stores with a vector index. */
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 16/18] target/arm: Reuse sve_probe_page for scatter stores
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (14 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 15/18] target/arm: Reuse sve_probe_page for gather first-fault loads Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 17/18] target/arm: Reuse sve_probe_page for gather loads Richard Henderson
` (2 subsequent siblings)
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 182 ++++++++++++++++++++++++----------------
1 file changed, 111 insertions(+), 71 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index 6229ea65c0..f4cdeecdcb 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -5409,94 +5409,134 @@ DO_LDFF1_ZPZ_D(dd_be, zd, MO_64)
/* Stores with a vector index. */
-static void sve_st1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
+static inline QEMU_ALWAYS_INLINE
+void sve_st1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
+ target_ulong base, uint32_t desc, uintptr_t retaddr,
+ int esize, int msize, zreg_off_fn *off_fn,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t i, oprsz = simd_oprsz(desc);
+ const int mmu_idx = cpu_mmu_index(env, false);
+ const intptr_t reg_max = simd_oprsz(desc);
+ void *host[ARM_MAX_VQ * 4];
+ intptr_t reg_off, i;
+ SVEHostPage info, info2;
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
+ /*
+ * Probe all of the elements for host addresses and flags.
+ */
+ i = reg_off = 0;
+ do {
+ uint64_t pg = vg[reg_off >> 6];
do {
- if (likely(pg & 1)) {
- target_ulong off = off_fn(vm, i);
- tlb_fn(env, vd, i, base + (off << scale), ra);
+ target_ulong addr = base + (off_fn(vm, reg_off) << scale);
+ target_ulong in_page = -(addr | TARGET_PAGE_MASK);
+
+ host[i] = NULL;
+ if (likely((pg >> (reg_off & 63)) & 1)) {
+ if (likely(in_page >= msize)) {
+ sve_probe_page(&info, false, env, addr, 0, MMU_DATA_STORE,
+ mmu_idx, retaddr);
+ host[i] = info.host;
+ } else {
+ /*
+ * Element crosses the page boundary.
+ * Probe both pages, but do not record the host address,
+ * so that we use the slow path.
+ */
+ sve_probe_page(&info, false, env, addr, 0,
+ MMU_DATA_STORE, mmu_idx, retaddr);
+ sve_probe_page(&info2, false, env, addr + in_page, 0,
+ MMU_DATA_STORE, mmu_idx, retaddr);
+ info.flags |= info2.flags;
+ }
+
+ if (unlikely(info.flags & TLB_WATCHPOINT)) {
+ cpu_check_watchpoint(env_cpu(env), addr, msize,
+ info.attrs, BP_MEM_WRITE, retaddr);
+ }
+ /* TODO: MTE check. */
}
- i += 4, pg >>= 4;
- } while (i & 15);
- }
-}
+ i += 1;
+ reg_off += esize;
+ } while (reg_off & 63);
+ } while (reg_off < reg_max);
-static void sve_st1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
-{
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t i, oprsz = simd_oprsz(desc) / 8;
-
- for (i = 0; i < oprsz; i++) {
- uint8_t pg = *(uint8_t *)(vg + H1(i));
- if (likely(pg & 1)) {
- target_ulong off = off_fn(vm, i * 8);
- tlb_fn(env, vd, i * 8, base + (off << scale), ra);
+ /*
+ * Now that we have recognized all exceptions except SyncExternal
+ * (from TLB_MMIO), which we cannot avoid, perform all of the stores.
+ *
+ * Note for the common case of an element in RAM, not crossing a page
+ * boundary, we have stored the host address in host[]. This doubles
+ * as a first-level check against the predicate, since only enabled
+ * elements have non-null host addresses.
+ */
+ i = reg_off = 0;
+ do {
+ void *h = host[i];
+ if (likely(h != NULL)) {
+ host_fn(vd, reg_off, h);
+ } else if ((vg[reg_off >> 6] >> (reg_off & 63)) & 1) {
+ target_ulong addr = base + (off_fn(vm, reg_off) << scale);
+ tlb_fn(env, vd, reg_off, addr, retaddr);
}
- }
+ i += 1;
+ reg_off += esize;
+ } while (reg_off < reg_max);
}
-#define DO_ST1_ZPZ_S(MEM, OFS) \
-void QEMU_FLATTEN HELPER(sve_st##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_st1_zs(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_s, sve_st1##MEM##_tlb); \
+#define DO_ST1_ZPZ_S(MEM, OFS, MSZ) \
+void HELPER(sve_st##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_st1_z(env, vd, vg, vm, base, desc, GETPC(), 4, 1 << MSZ, \
+ off_##OFS##_s, sve_st1##MEM##_host, sve_st1##MEM##_tlb); \
}
-#define DO_ST1_ZPZ_D(MEM, OFS) \
-void QEMU_FLATTEN HELPER(sve_st##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_st1_zd(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_d, sve_st1##MEM##_tlb); \
+#define DO_ST1_ZPZ_D(MEM, OFS, MSZ) \
+void HELPER(sve_st##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_st1_z(env, vd, vg, vm, base, desc, GETPC(), 8, 1 << MSZ, \
+ off_##OFS##_d, sve_st1##MEM##_host, sve_st1##MEM##_tlb); \
}
-DO_ST1_ZPZ_S(bs, zsu)
-DO_ST1_ZPZ_S(hs_le, zsu)
-DO_ST1_ZPZ_S(hs_be, zsu)
-DO_ST1_ZPZ_S(ss_le, zsu)
-DO_ST1_ZPZ_S(ss_be, zsu)
+DO_ST1_ZPZ_S(bs, zsu, MO_8)
+DO_ST1_ZPZ_S(hs_le, zsu, MO_16)
+DO_ST1_ZPZ_S(hs_be, zsu, MO_16)
+DO_ST1_ZPZ_S(ss_le, zsu, MO_32)
+DO_ST1_ZPZ_S(ss_be, zsu, MO_32)
-DO_ST1_ZPZ_S(bs, zss)
-DO_ST1_ZPZ_S(hs_le, zss)
-DO_ST1_ZPZ_S(hs_be, zss)
-DO_ST1_ZPZ_S(ss_le, zss)
-DO_ST1_ZPZ_S(ss_be, zss)
+DO_ST1_ZPZ_S(bs, zss, MO_8)
+DO_ST1_ZPZ_S(hs_le, zss, MO_16)
+DO_ST1_ZPZ_S(hs_be, zss, MO_16)
+DO_ST1_ZPZ_S(ss_le, zss, MO_32)
+DO_ST1_ZPZ_S(ss_be, zss, MO_32)
-DO_ST1_ZPZ_D(bd, zsu)
-DO_ST1_ZPZ_D(hd_le, zsu)
-DO_ST1_ZPZ_D(hd_be, zsu)
-DO_ST1_ZPZ_D(sd_le, zsu)
-DO_ST1_ZPZ_D(sd_be, zsu)
-DO_ST1_ZPZ_D(dd_le, zsu)
-DO_ST1_ZPZ_D(dd_be, zsu)
+DO_ST1_ZPZ_D(bd, zsu, MO_8)
+DO_ST1_ZPZ_D(hd_le, zsu, MO_16)
+DO_ST1_ZPZ_D(hd_be, zsu, MO_16)
+DO_ST1_ZPZ_D(sd_le, zsu, MO_32)
+DO_ST1_ZPZ_D(sd_be, zsu, MO_32)
+DO_ST1_ZPZ_D(dd_le, zsu, MO_64)
+DO_ST1_ZPZ_D(dd_be, zsu, MO_64)
-DO_ST1_ZPZ_D(bd, zss)
-DO_ST1_ZPZ_D(hd_le, zss)
-DO_ST1_ZPZ_D(hd_be, zss)
-DO_ST1_ZPZ_D(sd_le, zss)
-DO_ST1_ZPZ_D(sd_be, zss)
-DO_ST1_ZPZ_D(dd_le, zss)
-DO_ST1_ZPZ_D(dd_be, zss)
+DO_ST1_ZPZ_D(bd, zss, MO_8)
+DO_ST1_ZPZ_D(hd_le, zss, MO_16)
+DO_ST1_ZPZ_D(hd_be, zss, MO_16)
+DO_ST1_ZPZ_D(sd_le, zss, MO_32)
+DO_ST1_ZPZ_D(sd_be, zss, MO_32)
+DO_ST1_ZPZ_D(dd_le, zss, MO_64)
+DO_ST1_ZPZ_D(dd_be, zss, MO_64)
-DO_ST1_ZPZ_D(bd, zd)
-DO_ST1_ZPZ_D(hd_le, zd)
-DO_ST1_ZPZ_D(hd_be, zd)
-DO_ST1_ZPZ_D(sd_le, zd)
-DO_ST1_ZPZ_D(sd_be, zd)
-DO_ST1_ZPZ_D(dd_le, zd)
-DO_ST1_ZPZ_D(dd_be, zd)
+DO_ST1_ZPZ_D(bd, zd, MO_8)
+DO_ST1_ZPZ_D(hd_le, zd, MO_16)
+DO_ST1_ZPZ_D(hd_be, zd, MO_16)
+DO_ST1_ZPZ_D(sd_le, zd, MO_32)
+DO_ST1_ZPZ_D(sd_be, zd, MO_32)
+DO_ST1_ZPZ_D(dd_le, zd, MO_64)
+DO_ST1_ZPZ_D(dd_be, zd, MO_64)
#undef DO_ST1_ZPZ_S
#undef DO_ST1_ZPZ_D
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 17/18] target/arm: Reuse sve_probe_page for gather loads
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (15 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 16/18] target/arm: Reuse sve_probe_page for scatter stores Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 18/18] target/arm: Remove sve_memopidx Richard Henderson
2020-04-22 5:37 ` [PATCH v3 00/18] target/arm: sve load/store improvements no-reply
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/sve_helper.c | 208 +++++++++++++++++++++-------------------
1 file changed, 109 insertions(+), 99 deletions(-)
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index f4cdeecdcb..fffde4b6ec 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -5120,130 +5120,140 @@ static target_ulong off_zd_d(void *reg, intptr_t reg_ofs)
return *(uint64_t *)(reg + reg_ofs);
}
-static void sve_ld1_zs(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
+static inline QEMU_ALWAYS_INLINE
+void sve_ld1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
+ target_ulong base, uint32_t desc, uintptr_t retaddr,
+ int esize, int msize, zreg_off_fn *off_fn,
+ sve_ldst1_host_fn *host_fn,
+ sve_ldst1_tlb_fn *tlb_fn)
{
const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t i, oprsz = simd_oprsz(desc);
- ARMVectorReg scratch = { };
+ const int mmu_idx = cpu_mmu_index(env, false);
+ const intptr_t reg_max = simd_oprsz(desc);
+ ARMVectorReg scratch;
+ intptr_t reg_off;
+ SVEHostPage info, info2;
- for (i = 0; i < oprsz; ) {
- uint16_t pg = *(uint16_t *)(vg + H1_2(i >> 3));
+ memset(&scratch, 0, reg_max);
+ reg_off = 0;
+ do {
+ uint64_t pg = vg[reg_off >> 6];
do {
if (likely(pg & 1)) {
- target_ulong off = off_fn(vm, i);
- tlb_fn(env, &scratch, i, base + (off << scale), ra);
+ target_ulong addr = base + (off_fn(vm, reg_off) << scale);
+ target_ulong in_page = -(addr | TARGET_PAGE_MASK);
+
+ sve_probe_page(&info, false, env, addr, 0, MMU_DATA_LOAD,
+ mmu_idx, retaddr);
+
+ if (likely(in_page >= msize)) {
+ if (unlikely(info.flags & TLB_WATCHPOINT)) {
+ cpu_check_watchpoint(env_cpu(env), addr, msize,
+ info.attrs, BP_MEM_READ, retaddr);
+ }
+ /* TODO: MTE check */
+ host_fn(&scratch, reg_off, info.host);
+ } else {
+ /* Element crosses the page boundary. */
+ sve_probe_page(&info2, false, env, addr + in_page, 0,
+ MMU_DATA_LOAD, mmu_idx, retaddr);
+ if (unlikely((info.flags | info2.flags) & TLB_WATCHPOINT)) {
+ cpu_check_watchpoint(env_cpu(env), addr,
+ msize, info.attrs,
+ BP_MEM_READ, retaddr);
+ }
+ /* TODO: MTE check */
+ tlb_fn(env, &scratch, reg_off, addr, retaddr);
+ }
}
- i += 4, pg >>= 4;
- } while (i & 15);
- }
+ reg_off += esize;
+ pg >>= esize;
+ } while (reg_off & 63);
+ } while (reg_off < reg_max);
/* Wait until all exceptions have been raised to write back. */
- memcpy(vd, &scratch, oprsz);
+ memcpy(vd, &scratch, reg_max);
}
-static void sve_ld1_zd(CPUARMState *env, void *vd, void *vg, void *vm,
- target_ulong base, uint32_t desc, uintptr_t ra,
- zreg_off_fn *off_fn, sve_ldst1_tlb_fn *tlb_fn)
-{
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
- intptr_t i, oprsz = simd_oprsz(desc) / 8;
- ARMVectorReg scratch = { };
-
- for (i = 0; i < oprsz; i++) {
- uint8_t pg = *(uint8_t *)(vg + H1(i));
- if (likely(pg & 1)) {
- target_ulong off = off_fn(vm, i * 8);
- tlb_fn(env, &scratch, i * 8, base + (off << scale), ra);
- }
- }
-
- /* Wait until all exceptions have been raised to write back. */
- memcpy(vd, &scratch, oprsz * 8);
+#define DO_LD1_ZPZ_S(MEM, OFS, MSZ) \
+void HELPER(sve_ld##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_ld1_z(env, vd, vg, vm, base, desc, GETPC(), 4, 1 << MSZ, \
+ off_##OFS##_s, sve_ld1##MEM##_host, sve_ld1##MEM##_tlb); \
}
-#define DO_LD1_ZPZ_S(MEM, OFS) \
-void QEMU_FLATTEN HELPER(sve_ld##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_ld1_zs(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_s, sve_ld1##MEM##_tlb); \
+#define DO_LD1_ZPZ_D(MEM, OFS, MSZ) \
+void HELPER(sve_ld##MEM##_##OFS)(CPUARMState *env, void *vd, void *vg, \
+ void *vm, target_ulong base, uint32_t desc) \
+{ \
+ sve_ld1_z(env, vd, vg, vm, base, desc, GETPC(), 8, 1 << MSZ, \
+ off_##OFS##_d, sve_ld1##MEM##_host, sve_ld1##MEM##_tlb); \
}
-#define DO_LD1_ZPZ_D(MEM, OFS) \
-void QEMU_FLATTEN HELPER(sve_ld##MEM##_##OFS) \
- (CPUARMState *env, void *vd, void *vg, void *vm, \
- target_ulong base, uint32_t desc) \
-{ \
- sve_ld1_zd(env, vd, vg, vm, base, desc, GETPC(), \
- off_##OFS##_d, sve_ld1##MEM##_tlb); \
-}
+DO_LD1_ZPZ_S(bsu, zsu, MO_8)
+DO_LD1_ZPZ_S(bsu, zss, MO_8)
+DO_LD1_ZPZ_D(bdu, zsu, MO_8)
+DO_LD1_ZPZ_D(bdu, zss, MO_8)
+DO_LD1_ZPZ_D(bdu, zd, MO_8)
-DO_LD1_ZPZ_S(bsu, zsu)
-DO_LD1_ZPZ_S(bsu, zss)
-DO_LD1_ZPZ_D(bdu, zsu)
-DO_LD1_ZPZ_D(bdu, zss)
-DO_LD1_ZPZ_D(bdu, zd)
+DO_LD1_ZPZ_S(bss, zsu, MO_8)
+DO_LD1_ZPZ_S(bss, zss, MO_8)
+DO_LD1_ZPZ_D(bds, zsu, MO_8)
+DO_LD1_ZPZ_D(bds, zss, MO_8)
+DO_LD1_ZPZ_D(bds, zd, MO_8)
-DO_LD1_ZPZ_S(bss, zsu)
-DO_LD1_ZPZ_S(bss, zss)
-DO_LD1_ZPZ_D(bds, zsu)
-DO_LD1_ZPZ_D(bds, zss)
-DO_LD1_ZPZ_D(bds, zd)
+DO_LD1_ZPZ_S(hsu_le, zsu, MO_16)
+DO_LD1_ZPZ_S(hsu_le, zss, MO_16)
+DO_LD1_ZPZ_D(hdu_le, zsu, MO_16)
+DO_LD1_ZPZ_D(hdu_le, zss, MO_16)
+DO_LD1_ZPZ_D(hdu_le, zd, MO_16)
-DO_LD1_ZPZ_S(hsu_le, zsu)
-DO_LD1_ZPZ_S(hsu_le, zss)
-DO_LD1_ZPZ_D(hdu_le, zsu)
-DO_LD1_ZPZ_D(hdu_le, zss)
-DO_LD1_ZPZ_D(hdu_le, zd)
+DO_LD1_ZPZ_S(hsu_be, zsu, MO_16)
+DO_LD1_ZPZ_S(hsu_be, zss, MO_16)
+DO_LD1_ZPZ_D(hdu_be, zsu, MO_16)
+DO_LD1_ZPZ_D(hdu_be, zss, MO_16)
+DO_LD1_ZPZ_D(hdu_be, zd, MO_16)
-DO_LD1_ZPZ_S(hsu_be, zsu)
-DO_LD1_ZPZ_S(hsu_be, zss)
-DO_LD1_ZPZ_D(hdu_be, zsu)
-DO_LD1_ZPZ_D(hdu_be, zss)
-DO_LD1_ZPZ_D(hdu_be, zd)
+DO_LD1_ZPZ_S(hss_le, zsu, MO_16)
+DO_LD1_ZPZ_S(hss_le, zss, MO_16)
+DO_LD1_ZPZ_D(hds_le, zsu, MO_16)
+DO_LD1_ZPZ_D(hds_le, zss, MO_16)
+DO_LD1_ZPZ_D(hds_le, zd, MO_16)
-DO_LD1_ZPZ_S(hss_le, zsu)
-DO_LD1_ZPZ_S(hss_le, zss)
-DO_LD1_ZPZ_D(hds_le, zsu)
-DO_LD1_ZPZ_D(hds_le, zss)
-DO_LD1_ZPZ_D(hds_le, zd)
+DO_LD1_ZPZ_S(hss_be, zsu, MO_16)
+DO_LD1_ZPZ_S(hss_be, zss, MO_16)
+DO_LD1_ZPZ_D(hds_be, zsu, MO_16)
+DO_LD1_ZPZ_D(hds_be, zss, MO_16)
+DO_LD1_ZPZ_D(hds_be, zd, MO_16)
-DO_LD1_ZPZ_S(hss_be, zsu)
-DO_LD1_ZPZ_S(hss_be, zss)
-DO_LD1_ZPZ_D(hds_be, zsu)
-DO_LD1_ZPZ_D(hds_be, zss)
-DO_LD1_ZPZ_D(hds_be, zd)
+DO_LD1_ZPZ_S(ss_le, zsu, MO_32)
+DO_LD1_ZPZ_S(ss_le, zss, MO_32)
+DO_LD1_ZPZ_D(sdu_le, zsu, MO_32)
+DO_LD1_ZPZ_D(sdu_le, zss, MO_32)
+DO_LD1_ZPZ_D(sdu_le, zd, MO_32)
-DO_LD1_ZPZ_S(ss_le, zsu)
-DO_LD1_ZPZ_S(ss_le, zss)
-DO_LD1_ZPZ_D(sdu_le, zsu)
-DO_LD1_ZPZ_D(sdu_le, zss)
-DO_LD1_ZPZ_D(sdu_le, zd)
+DO_LD1_ZPZ_S(ss_be, zsu, MO_32)
+DO_LD1_ZPZ_S(ss_be, zss, MO_32)
+DO_LD1_ZPZ_D(sdu_be, zsu, MO_32)
+DO_LD1_ZPZ_D(sdu_be, zss, MO_32)
+DO_LD1_ZPZ_D(sdu_be, zd, MO_32)
-DO_LD1_ZPZ_S(ss_be, zsu)
-DO_LD1_ZPZ_S(ss_be, zss)
-DO_LD1_ZPZ_D(sdu_be, zsu)
-DO_LD1_ZPZ_D(sdu_be, zss)
-DO_LD1_ZPZ_D(sdu_be, zd)
+DO_LD1_ZPZ_D(sds_le, zsu, MO_32)
+DO_LD1_ZPZ_D(sds_le, zss, MO_32)
+DO_LD1_ZPZ_D(sds_le, zd, MO_32)
-DO_LD1_ZPZ_D(sds_le, zsu)
-DO_LD1_ZPZ_D(sds_le, zss)
-DO_LD1_ZPZ_D(sds_le, zd)
+DO_LD1_ZPZ_D(sds_be, zsu, MO_32)
+DO_LD1_ZPZ_D(sds_be, zss, MO_32)
+DO_LD1_ZPZ_D(sds_be, zd, MO_32)
-DO_LD1_ZPZ_D(sds_be, zsu)
-DO_LD1_ZPZ_D(sds_be, zss)
-DO_LD1_ZPZ_D(sds_be, zd)
+DO_LD1_ZPZ_D(dd_le, zsu, MO_64)
+DO_LD1_ZPZ_D(dd_le, zss, MO_64)
+DO_LD1_ZPZ_D(dd_le, zd, MO_64)
-DO_LD1_ZPZ_D(dd_le, zsu)
-DO_LD1_ZPZ_D(dd_le, zss)
-DO_LD1_ZPZ_D(dd_le, zd)
-
-DO_LD1_ZPZ_D(dd_be, zsu)
-DO_LD1_ZPZ_D(dd_be, zss)
-DO_LD1_ZPZ_D(dd_be, zd)
+DO_LD1_ZPZ_D(dd_be, zsu, MO_64)
+DO_LD1_ZPZ_D(dd_be, zss, MO_64)
+DO_LD1_ZPZ_D(dd_be, zd, MO_64)
#undef DO_LD1_ZPZ_S
#undef DO_LD1_ZPZ_D
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* [PATCH v3 18/18] target/arm: Remove sve_memopidx
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (16 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 17/18] target/arm: Reuse sve_probe_page for gather loads Richard Henderson
@ 2020-04-22 4:33 ` Richard Henderson
2020-04-22 5:37 ` [PATCH v3 00/18] target/arm: sve load/store improvements no-reply
18 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-22 4:33 UTC (permalink / raw)
To: qemu-devel; +Cc: peter.maydell, qemu-arm
None of the sve helpers use TCGMemOpIdx any longer, so we can
stop passing it.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/internals.h | 5 -----
target/arm/sve_helper.c | 14 +++++++-------
target/arm/translate-sve.c | 17 +++--------------
3 files changed, 10 insertions(+), 26 deletions(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index e633aff36e..a833e3941d 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -979,11 +979,6 @@ static inline int arm_num_ctx_cmps(ARMCPU *cpu)
}
}
-/* Note make_memop_idx reserves 4 bits for mmu_idx, and MO_BSWAP is bit 3.
- * Thus a TCGMemOpIdx, without any MO_ALIGN bits, fits in 8 bits.
- */
-#define MEMOPIDX_SHIFT 8
-
/**
* v7m_using_psp: Return true if using process stack pointer
* Return true if the CPU is currently using the process stack
diff --git a/target/arm/sve_helper.c b/target/arm/sve_helper.c
index fffde4b6ec..f482fdd285 100644
--- a/target/arm/sve_helper.c
+++ b/target/arm/sve_helper.c
@@ -4440,7 +4440,7 @@ void sve_ldN_r(CPUARMState *env, uint64_t *vg, const target_ulong addr,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
+ const unsigned rd = simd_data(desc);
const intptr_t reg_max = simd_oprsz(desc);
intptr_t reg_off, reg_last, mem_off;
SVEContLdSt info;
@@ -4696,7 +4696,7 @@ void sve_ldnfff1_r(CPUARMState *env, void *vg, const target_ulong addr,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
+ const unsigned rd = simd_data(desc);
void *vd = &env->vfp.zregs[rd];
const intptr_t reg_max = simd_oprsz(desc);
intptr_t reg_off, mem_off, reg_last;
@@ -4921,7 +4921,7 @@ void sve_stN_r(CPUARMState *env, uint64_t *vg, target_ulong addr, uint32_t desc,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
- const unsigned rd = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 5);
+ const unsigned rd = simd_data(desc);
const intptr_t reg_max = simd_oprsz(desc);
intptr_t reg_off, reg_last, mem_off;
SVEContLdSt info;
@@ -5127,9 +5127,9 @@ void sve_ld1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
const int mmu_idx = cpu_mmu_index(env, false);
const intptr_t reg_max = simd_oprsz(desc);
+ const int scale = simd_data(desc);
ARMVectorReg scratch;
intptr_t reg_off;
SVEHostPage info, info2;
@@ -5272,10 +5272,10 @@ void sve_ldff1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
sve_ldst1_tlb_fn *tlb_fn)
{
const int mmu_idx = cpu_mmu_index(env, false);
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
+ const intptr_t reg_max = simd_oprsz(desc);
+ const int scale = simd_data(desc);
const int esize = 1 << esz;
const int msize = 1 << msz;
- const intptr_t reg_max = simd_oprsz(desc);
intptr_t reg_off;
SVEHostPage info;
target_ulong addr, in_page;
@@ -5426,9 +5426,9 @@ void sve_st1_z(CPUARMState *env, void *vd, uint64_t *vg, void *vm,
sve_ldst1_host_fn *host_fn,
sve_ldst1_tlb_fn *tlb_fn)
{
- const int scale = extract32(desc, SIMD_DATA_SHIFT + MEMOPIDX_SHIFT, 2);
const int mmu_idx = cpu_mmu_index(env, false);
const intptr_t reg_max = simd_oprsz(desc);
+ const int scale = simd_data(desc);
void *host[ARM_MAX_VQ * 4];
intptr_t reg_off, i;
SVEHostPage info, info2;
diff --git a/target/arm/translate-sve.c b/target/arm/translate-sve.c
index b35bad245e..7bd7de80e6 100644
--- a/target/arm/translate-sve.c
+++ b/target/arm/translate-sve.c
@@ -4584,11 +4584,6 @@ static const uint8_t dtype_esz[16] = {
3, 2, 1, 3
};
-static TCGMemOpIdx sve_memopidx(DisasContext *s, int dtype)
-{
- return make_memop_idx(s->be_data | dtype_mop[dtype], get_mem_index(s));
-}
-
static void do_mem_zpa(DisasContext *s, int zt, int pg, TCGv_i64 addr,
int dtype, gen_helper_gvec_mem *fn)
{
@@ -4601,9 +4596,7 @@ static void do_mem_zpa(DisasContext *s, int zt, int pg, TCGv_i64 addr,
* registers as pointers, so encode the regno into the data field.
* For consistency, do this even for LD1.
*/
- desc = sve_memopidx(s, dtype);
- desc |= zt << MEMOPIDX_SHIFT;
- desc = simd_desc(vsz, vsz, desc);
+ desc = simd_desc(vsz, vsz, zt);
t_desc = tcg_const_i32(desc);
t_pg = tcg_temp_new_ptr();
@@ -4835,9 +4828,7 @@ static void do_ldrq(DisasContext *s, int zt, int pg, TCGv_i64 addr, int msz)
int desc, poff;
/* Load the first quadword using the normal predicated load helpers. */
- desc = sve_memopidx(s, msz_dtype(s, msz));
- desc |= zt << MEMOPIDX_SHIFT;
- desc = simd_desc(16, 16, desc);
+ desc = simd_desc(16, 16, zt);
t_desc = tcg_const_i32(desc);
poff = pred_full_reg_offset(s, pg);
@@ -5066,9 +5057,7 @@ static void do_mem_zpz(DisasContext *s, int zt, int pg, int zm,
TCGv_i32 t_desc;
int desc;
- desc = sve_memopidx(s, msz_dtype(s, msz));
- desc |= scale << MEMOPIDX_SHIFT;
- desc = simd_desc(vsz, vsz, desc);
+ desc = simd_desc(vsz, vsz, scale);
t_desc = tcg_const_i32(desc);
tcg_gen_addi_ptr(t_pg, cpu_env, pred_full_reg_offset(s, pg));
--
2.20.1
^ permalink raw reply related [flat|nested] 34+ messages in thread
* Re: [PATCH v3 00/18] target/arm: sve load/store improvements
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
` (17 preceding siblings ...)
2020-04-22 4:33 ` [PATCH v3 18/18] target/arm: Remove sve_memopidx Richard Henderson
@ 2020-04-22 5:37 ` no-reply
18 siblings, 0 replies; 34+ messages in thread
From: no-reply @ 2020-04-22 5:37 UTC (permalink / raw)
To: richard.henderson; +Cc: peter.maydell, qemu-arm, qemu-devel
Patchew URL: https://patchew.org/QEMU/20200422043309.18430-1-richard.henderson@linaro.org/
Hi,
This series seems to have some coding style problems. See output below for
more information:
Subject: [PATCH v3 00/18] target/arm: sve load/store improvements
Message-id: 20200422043309.18430-1-richard.henderson@linaro.org
Type: series
=== TEST SCRIPT BEGIN ===
#!/bin/bash
git rev-parse base > /dev/null || exit 0
git config --local diff.renamelimit 0
git config --local diff.renames True
git config --local diff.algorithm histogram
./scripts/checkpatch.pl --mailback base..
=== TEST SCRIPT END ===
Switched to a new branch 'test'
4cc449f target/arm: Remove sve_memopidx
cecb8e8 target/arm: Reuse sve_probe_page for gather loads
9c2bbf3 target/arm: Reuse sve_probe_page for scatter stores
1f230e5 target/arm: Reuse sve_probe_page for gather first-fault loads
072e665 target/arm: Use SVEContLdSt for contiguous stores
64dc8bd target/arm: Update contiguous first-fault and no-fault loads
fa5a242 target/arm: Use SVEContLdSt for multi-register contiguous loads
b0e22ec target/arm: Handle watchpoints in sve_ld1_r
336353e target/arm: Use SVEContLdSt in sve_ld1_r
5d103ea target/arm: Adjust interface of sve_ld1_host_fn
cf5a541 target/arm: Add sve infrastructure for page lookup
67e550d target/arm: Drop manual handling of set/clear_helper_retaddr
c1428bf target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn
e625d1a accel/tcg: Add endian-specific cpu_{ld, st}* operations
c4a1a7c accel/tcg: Add probe_access_flags
7f333bf accel/tcg: Add block comment for probe_access
c43405b exec: Fix cpu_watchpoint_address_matches address length
543daa3 exec: Add block comments for watchpoint routines
=== OUTPUT BEGIN ===
1/18 Checking commit 543daa3e504d (exec: Add block comments for watchpoint routines)
2/18 Checking commit c43405b82eea (exec: Fix cpu_watchpoint_address_matches address length)
3/18 Checking commit 7f333bf1a998 (accel/tcg: Add block comment for probe_access)
4/18 Checking commit c4a1a7c041e7 (accel/tcg: Add probe_access_flags)
5/18 Checking commit e625d1af4070 (accel/tcg: Add endian-specific cpu_{ld, st}* operations)
6/18 Checking commit c1428bfc6ba8 (target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn)
ERROR: spaces required around that '*' (ctx:VxV)
#62: FILE: target/arm/sve_helper.c:4029:
+ TLB(env, addr, (TYPEM)*(TYPEE *)(vd + H(reg_off)), ra); \
^
ERROR: spaces required around that '*' (ctx:WxV)
#152: FILE: target/arm/sve_helper.c:4162:
+ sve_ldst1_tlb_fn *tlb_fn)
^
total: 2 errors, 0 warnings, 455 lines checked
Patch 6/18 has style problems, please review. If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
7/18 Checking commit 67e550dfef24 (target/arm: Drop manual handling of set/clear_helper_retaddr)
8/18 Checking commit cf5a541132ca (target/arm: Add sve infrastructure for page lookup)
WARNING: Block comments use a leading /* on a separate line
#31: FILE: target/arm/sve_helper.c:1633:
+/* Big-endian hosts need to frob the byte indices. If the copy
total: 0 errors, 1 warnings, 281 lines checked
Patch 8/18 has style problems, please review. If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.
9/18 Checking commit 5d103ea6bb5f (target/arm: Adjust interface of sve_ld1_host_fn)
10/18 Checking commit 336353e1eeae (target/arm: Use SVEContLdSt in sve_ld1_r)
11/18 Checking commit b0e22ec2e54e (target/arm: Handle watchpoints in sve_ld1_r)
12/18 Checking commit fa5a242e25d2 (target/arm: Use SVEContLdSt for multi-register contiguous loads)
13/18 Checking commit 64dc8bd8c13d (target/arm: Update contiguous first-fault and no-fault loads)
14/18 Checking commit 072e665663b5 (target/arm: Use SVEContLdSt for contiguous stores)
15/18 Checking commit 1f230e521a1d (target/arm: Reuse sve_probe_page for gather first-fault loads)
16/18 Checking commit 9c2bbf312f6c (target/arm: Reuse sve_probe_page for scatter stores)
17/18 Checking commit cecb8e871485 (target/arm: Reuse sve_probe_page for gather loads)
18/18 Checking commit 4cc449fa07c0 (target/arm: Remove sve_memopidx)
=== OUTPUT END ===
Test command exited with code: 1
The full log is available at
http://patchew.org/logs/20200422043309.18430-1-richard.henderson@linaro.org/testing.checkpatch/?type=message.
---
Email generated automatically by Patchew [https://patchew.org/].
Please send your feedback to patchew-devel@redhat.com
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 01/18] exec: Add block comments for watchpoint routines
2020-04-22 4:32 ` [PATCH v3 01/18] exec: Add block comments for watchpoint routines Richard Henderson
@ 2020-04-27 9:27 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 9:27 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> include/hw/core/cpu.h | 23 +++++++++++++++++++++++
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length
2020-04-22 4:32 ` [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length Richard Henderson
@ 2020-04-27 9:28 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 9:28 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> The only caller of cpu_watchpoint_address_matches passes
> TARGET_PAGE_SIZE, so the bug is not currently visible.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> exec.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations
2020-04-22 4:32 ` [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations Richard Henderson
@ 2020-04-27 9:46 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 9:46 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> We currently have target-endian versions of these operations,
> but no easy way to force a specific endianness. This can be
> helpful if the target has endian-specific operations, or a mode
> that swaps endianness.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> docs/devel/loads-stores.rst | 39 +++--
> include/exec/cpu_ldst.h | 277 +++++++++++++++++++++++++++---------
> accel/tcg/cputlb.c | 236 ++++++++++++++++++++++--------
> accel/tcg/user-exec.c | 211 ++++++++++++++++++++++-----
> 4 files changed, 587 insertions(+), 176 deletions(-)
>
> diff --git a/docs/devel/loads-stores.rst b/docs/devel/loads-stores.rst
> index 0d99eb24c1..9a944ef1af 100644
> --- a/docs/devel/loads-stores.rst
> +++ b/docs/devel/loads-stores.rst
> @@ -97,9 +97,9 @@ function, which is a return address into the generated code.
>
> Function names follow the pattern:
>
> -load: ``cpu_ld{sign}{size}_mmuidx_ra(env, ptr, mmuidx, retaddr)``
> +load: ``cpu_ld{sign}{size}{end}_mmuidx_ra(env, ptr, mmuidx, retaddr)``
>
> -store: ``cpu_st{size}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
> +store: ``cpu_st{size}{end}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
>
> ``sign``
> - (empty) : for 32 or 64 bit sizes
> @@ -112,9 +112,14 @@ store: ``cpu_st{size}_mmuidx_ra(env, ptr, val, mmuidx, retaddr)``
> - ``l`` : 32 bits
> - ``q`` : 64 bits
>
> +``end``
> + - (empty) : for target endian, or 8 bit sizes
> + - ``_be`` : big endian
> + - ``_le`` : little endian
> +
> Regexes for git grep:
> - - ``\<cpu_ld[us]\?[bwlq]_mmuidx_ra\>``
> - - ``\<cpu_st[bwlq]_mmuidx_ra\>``
> + - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_mmuidx_ra\>``
> + - ``\<cpu_st[bwlq](_[bl]e)\?_mmuidx_ra\>``
>
> ``cpu_{ld,st}*_data_ra``
> ~~~~~~~~~~~~~~~~~~~~~~~~
> @@ -129,9 +134,9 @@ be performed with a context other than the default.
>
> Function names follow the pattern:
>
> -load: ``cpu_ld{sign}{size}_data_ra(env, ptr, ra)``
> +load: ``cpu_ld{sign}{size}{end}_data_ra(env, ptr, ra)``
>
> -store: ``cpu_st{size}_data_ra(env, ptr, val, ra)``
> +store: ``cpu_st{size}{end}_data_ra(env, ptr, val, ra)``
>
> ``sign``
> - (empty) : for 32 or 64 bit sizes
> @@ -144,9 +149,14 @@ store: ``cpu_st{size}_data_ra(env, ptr, val, ra)``
> - ``l`` : 32 bits
> - ``q`` : 64 bits
>
> +``end``
> + - (empty) : for target endian, or 8 bit sizes
> + - ``_be`` : big endian
> + - ``_le`` : little endian
> +
> Regexes for git grep:
> - - ``\<cpu_ld[us]\?[bwlq]_data_ra\>``
> - - ``\<cpu_st[bwlq]_data_ra\>``
> + - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_data_ra\>``
> + - ``\<cpu_st[bwlq](_[bl]e)\?_data_ra\>``
>
> ``cpu_{ld,st}*_data``
> ~~~~~~~~~~~~~~~~~~~~~
> @@ -163,9 +173,9 @@ the CPU state anyway.
>
> Function names follow the pattern:
>
> -load: ``cpu_ld{sign}{size}_data(env, ptr)``
> +load: ``cpu_ld{sign}{size}{end}_data(env, ptr)``
>
> -store: ``cpu_st{size}_data(env, ptr, val)``
> +store: ``cpu_st{size}{end}_data(env, ptr, val)``
>
> ``sign``
> - (empty) : for 32 or 64 bit sizes
> @@ -178,9 +188,14 @@ store: ``cpu_st{size}_data(env, ptr, val)``
> - ``l`` : 32 bits
> - ``q`` : 64 bits
>
> +``end``
> + - (empty) : for target endian, or 8 bit sizes
> + - ``_be`` : big endian
> + - ``_le`` : little endian
> +
> Regexes for git grep
> - - ``\<cpu_ld[us]\?[bwlq]_data\>``
> - - ``\<cpu_st[bwlq]_data\+\>``
> + - ``\<cpu_ld[us]\?[bwlq](_[bl]e)\?_data\>``
> + - ``\<cpu_st[bwlq](_[bl]e)\?_data\+\>``
>
> ``cpu_ld*_code``
> ~~~~~~~~~~~~~~~~
> diff --git a/include/exec/cpu_ldst.h b/include/exec/cpu_ldst.h
> index 53de19753a..1ba515bfcc 100644
> --- a/include/exec/cpu_ldst.h
> +++ b/include/exec/cpu_ldst.h
> @@ -26,12 +26,18 @@
> * The syntax for the accessors is:
> *
> * load: cpu_ld{sign}{size}_{mmusuffix}(env, ptr)
> + * cpu_ld{sign}{size}{end}_{mmusuffix}(env, ptr)
> * cpu_ld{sign}{size}_{mmusuffix}_ra(env, ptr, retaddr)
> + * cpu_ld{sign}{size}{end}_{mmusuffix}_ra(env, ptr, retaddr)
> * cpu_ld{sign}{size}_mmuidx_ra(env, ptr, mmu_idx, retaddr)
> + * cpu_ld{sign}{size}{end}_mmuidx_ra(env, ptr, mmu_idx, retaddr)
> *
> * store: cpu_st{size}_{mmusuffix}(env, ptr, val)
> + * cpu_st{size}{end}_{mmusuffix}(env, ptr, val)
> * cpu_st{size}_{mmusuffix}_ra(env, ptr, val, retaddr)
> + * cpu_st{size}{end}_{mmusuffix}_ra(env, ptr, val, retaddr)
> * cpu_st{size}_mmuidx_ra(env, ptr, val, mmu_idx, retaddr)
> + * cpu_st{size}{end}_mmuidx_ra(env, ptr, val, mmu_idx, retaddr)
Since '{end}' can be the empty string, these new lines should
replace the old ones, not just be added. (The other changes
in this doc do the right thing.)
> *
> * sign is:
> * (empty): for 32 and 64 bit sizes
> @@ -44,6 +50,11 @@
> * l: 32 bits
> * q: 64 bits
> *
> + * end is:
> + * (empty): for target native endian, or for 8 bit access
> + * _be: for forced big endian
> + * _le: for forced little endian
> + *
> * mmusuffix is one of the generic suffixes "data" or "code", or "mmuidx".
> * The "mmuidx" suffix carries an extra mmu_idx argument that specifies
> * the index to use; the "data" and "code" suffixes take the index from
Otherwise
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 04/18] accel/tcg: Add probe_access_flags
2020-04-22 4:32 ` [PATCH v3 04/18] accel/tcg: Add probe_access_flags Richard Henderson
@ 2020-04-27 10:48 ` Peter Maydell
2020-04-27 16:00 ` Richard Henderson
0 siblings, 1 reply; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 10:48 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> This new interface will allow targets to probe for a page
> and then handle watchpoints themselves. This will be most
> useful for vector predicated memory operations, where one
> page lookup can be used for many operations, and one test
> can avoid many watchpoint checks.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v2: Fix return of host pointer in softmmu probe_access_flags.
> ---
> include/exec/cpu-all.h | 13 ++-
> include/exec/exec-all.h | 22 +++++
> accel/tcg/cputlb.c | 177 ++++++++++++++++++++--------------------
> accel/tcg/user-exec.c | 36 +++++---
> 4 files changed, 149 insertions(+), 99 deletions(-)
>
> diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h
> index 49384bb66a..43ddcf024c 100644
> --- a/include/exec/cpu-all.h
> +++ b/include/exec/cpu-all.h
> @@ -328,7 +328,18 @@ CPUArchState *cpu_copy(CPUArchState *env);
> | CPU_INTERRUPT_TGT_EXT_3 \
> | CPU_INTERRUPT_TGT_EXT_4)
>
> -#if !defined(CONFIG_USER_ONLY)
> +#ifdef CONFIG_USER_ONLY
> +
> +/*
> + * Allow some level of source compatibility with softmmu. We do not
> + * support any of the more exotic features, so only invalid pages may
> + * be signaled by probe_access_flags().
> + */
> +#define TLB_INVALID_MASK (1 << (TARGET_PAGE_BITS_MIN - 1))
> +#define TLB_MMIO 0
> +#define TLB_WATCHPOINT 0
> +
> +#else
>
> /*
> * Flags stored in the low bits of the TLB virtual address.
> diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
> index d656a1f05c..8792bea07a 100644
> --- a/include/exec/exec-all.h
> +++ b/include/exec/exec-all.h
> @@ -362,6 +362,28 @@ static inline void *probe_read(CPUArchState *env, target_ulong addr, int size,
> return probe_access(env, addr, size, MMU_DATA_LOAD, mmu_idx, retaddr);
> }
>
> +/**
> + * probe_access_flags:
> + * @env: CPUArchState
> + * @addr: guest virtual address to look up
> + * @access_type: read, write or execute permission
> + * @mmu_idx: MMU index to use for lookup
> + * @nonfault: suppress the fault
> + * @phost: return value for host address
> + * @retaddr: return address for unwinding
> + *
> + * Similar to probe_access, loosely returning the TLB_FLAGS_MASK for
> + * the page, and storing the host address for RAM in @phost.
> + *
> + * If @nonfault is set, do not raise an exception but return TLB_INVALID_MASK.
> + * Do not handle watchpoints, but include TLB_WATCHPOINT in the returned flags.
> + * Do handle clean pages, so exclude TLB_NOTDIRY from the returned flags.
"TLB_NOTDIRTY"
> + * For simplicity, all "mmio-like" flags are folded to TLB_MMIO.
> + */
> +int probe_access_flags(CPUArchState *env, target_ulong addr,
> + MMUAccessType access_type, int mmu_idx,
> + bool nonfault, void **phost, uintptr_t retaddr);
> +
> #define CODE_GEN_ALIGN 16 /* must be >= of the size of a icache line */
>
> /* Estimated block size for TB allocation. */
> diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
> index e3b5750c3b..bbe265ce28 100644
> --- a/accel/tcg/cputlb.c
> +++ b/accel/tcg/cputlb.c
> @@ -1231,86 +1231,16 @@ static void notdirty_write(CPUState *cpu, vaddr mem_vaddr, unsigned size,
> }
> }
>
> -/*
> - * Probe for whether the specified guest access is permitted. If it is not
> - * permitted then an exception will be taken in the same way as if this
> - * were a real access (and we will not return).
> - * If the size is 0 or the page requires I/O access, returns NULL; otherwise,
> - * returns the address of the host page similar to tlb_vaddr_to_host().
> - */
> -void *probe_access(CPUArchState *env, target_ulong addr, int size,
> - MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
> +static int probe_access_internal(CPUArchState *env, target_ulong addr,
> + int fault_size, MMUAccessType access_type,
> + int mmu_idx, bool nonfault,
> + void **phost, uintptr_t retaddr)
> {
> uintptr_t index = tlb_index(env, mmu_idx, addr);
> CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
> - target_ulong tlb_addr;
> - size_t elt_ofs;
> - int wp_access;
> -
> - g_assert(-(addr | TARGET_PAGE_MASK) >= size);
> -
> - switch (access_type) {
> - case MMU_DATA_LOAD:
> - elt_ofs = offsetof(CPUTLBEntry, addr_read);
> - wp_access = BP_MEM_READ;
> - break;
> - case MMU_DATA_STORE:
> - elt_ofs = offsetof(CPUTLBEntry, addr_write);
> - wp_access = BP_MEM_WRITE;
> - break;
> - case MMU_INST_FETCH:
> - elt_ofs = offsetof(CPUTLBEntry, addr_code);
> - wp_access = BP_MEM_READ;
> - break;
> - default:
> - g_assert_not_reached();
> - }
> - tlb_addr = tlb_read_ofs(entry, elt_ofs);
> -
> - if (unlikely(!tlb_hit(tlb_addr, addr))) {
> - if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs,
> - addr & TARGET_PAGE_MASK)) {
> - tlb_fill(env_cpu(env), addr, size, access_type, mmu_idx, retaddr);
> - /* TLB resize via tlb_fill may have moved the entry. */
> - index = tlb_index(env, mmu_idx, addr);
> - entry = tlb_entry(env, mmu_idx, addr);
> - }
> - tlb_addr = tlb_read_ofs(entry, elt_ofs);
> - }
> -
> - if (!size) {
> - return NULL;
> - }
> -
> - if (unlikely(tlb_addr & TLB_FLAGS_MASK)) {
> - CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
> -
> - /* Reject I/O access, or other required slow-path. */
> - if (tlb_addr & (TLB_MMIO | TLB_BSWAP | TLB_DISCARD_WRITE)) {
> - return NULL;
> - }
> -
> - /* Handle watchpoints. */
> - if (tlb_addr & TLB_WATCHPOINT) {
> - cpu_check_watchpoint(env_cpu(env), addr, size,
> - iotlbentry->attrs, wp_access, retaddr);
> - }
> -
> - /* Handle clean RAM pages. */
> - if (tlb_addr & TLB_NOTDIRTY) {
> - notdirty_write(env_cpu(env), addr, size, iotlbentry, retaddr);
> - }
> - }
> -
> - return (void *)((uintptr_t)addr + entry->addend);
> -}
> -
> -void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
> - MMUAccessType access_type, int mmu_idx)
> -{
> - CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
> - target_ulong tlb_addr, page;
> + target_ulong tlb_addr, page_addr;
> size_t elt_ofs;
> + int flags;
>
> switch (access_type) {
> case MMU_DATA_LOAD:
> @@ -1325,20 +1255,19 @@ void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
> default:
> g_assert_not_reached();
> }
> -
> - page = addr & TARGET_PAGE_MASK;
> tlb_addr = tlb_read_ofs(entry, elt_ofs);
>
> - if (!tlb_hit_page(tlb_addr, page)) {
> - uintptr_t index = tlb_index(env, mmu_idx, addr);
> -
> - if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs, page)) {
> + page_addr = addr & TARGET_PAGE_MASK;
> + if (!tlb_hit_page(tlb_addr, page_addr)) {
> + if (!victim_tlb_hit(env, mmu_idx, index, elt_ofs, page_addr)) {
> CPUState *cs = env_cpu(env);
> CPUClass *cc = CPU_GET_CLASS(cs);
>
> - if (!cc->tlb_fill(cs, addr, 0, access_type, mmu_idx, true, 0)) {
> + if (!cc->tlb_fill(cs, addr, fault_size, access_type,
> + mmu_idx, nonfault, retaddr)) {
> /* Non-faulting page table read failed. */
> - return NULL;
> + *phost = NULL;
> + return TLB_INVALID_MASK;
> }
>
> /* TLB resize via tlb_fill may have moved the entry. */
> @@ -1346,15 +1275,89 @@ void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
> }
> tlb_addr = tlb_read_ofs(entry, elt_ofs);
> }
> + flags = tlb_addr & TLB_FLAGS_MASK;
>
> - if (tlb_addr & ~TARGET_PAGE_MASK) {
> - /* IO access */
> + /* Fold all "mmio-like" bits into TLB_MMIO. This is not RAM. */
> + if (unlikely(flags & ~(TLB_WATCHPOINT | TLB_NOTDIRTY))) {
> + *phost = NULL;
> + return TLB_MMIO;
> + }
> +
> + /* Everything else is RAM. */
> + *phost = (void *)((uintptr_t)addr + entry->addend);
> + return flags;
> +}
> +
> +int probe_access_flags(CPUArchState *env, target_ulong addr,
> + MMUAccessType access_type, int mmu_idx,
> + bool nonfault, void **phost, uintptr_t retaddr)
> +{
> + int flags;
> +
> + flags = probe_access_internal(env, addr, 0, access_type, mmu_idx,
> + nonfault, phost, retaddr);
> +
> + /* Handle clean RAM pages. */
> + if (unlikely(flags & TLB_NOTDIRTY)) {
> + uintptr_t index = tlb_index(env, mmu_idx, addr);
> + CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
> +
> + notdirty_write(env_cpu(env), addr, 1, iotlbentry, retaddr);
> + flags &= ~TLB_NOTDIRTY;
> + }
probe_access() handles watchpoints. Why doesn't probe_access_flags()
have to do that?
> +
> + return flags;
> +}
> +
> +void *probe_access(CPUArchState *env, target_ulong addr, int size,
> + MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
> +{
> + void *host;
> + int flags;
> +
> + g_assert(-(addr | TARGET_PAGE_MASK) >= size);
> +
> + flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
> + false, &host, retaddr);
> +
> + /* Per the interface, size == 0 merely faults the access. */
> + if (size == 0) {
> return NULL;
> }
>
> - return (void *)((uintptr_t)addr + entry->addend);
> + if (unlikely(flags & (TLB_NOTDIRTY | TLB_WATCHPOINT))) {
> + uintptr_t index = tlb_index(env, mmu_idx, addr);
> + CPUIOTLBEntry *iotlbentry = &env_tlb(env)->d[mmu_idx].iotlb[index];
> +
> + /* Handle clean RAM pages. */
> + if (flags & TLB_NOTDIRTY) {
> + notdirty_write(env_cpu(env), addr, 1, iotlbentry, retaddr);
> + }
> +
> + /* Handle watchpoints. */
> + if (flags & TLB_WATCHPOINT) {
> + int wp_access = (access_type == MMU_DATA_STORE
> + ? BP_MEM_WRITE : BP_MEM_READ);
> + cpu_check_watchpoint(env_cpu(env), addr, size,
> + iotlbentry->attrs, wp_access, retaddr);
> + }
The old code checked for watchpoints first, and then handled notdirty-writes,
which seems like the more correct order. Why has the new
version switched them around?
(Incidentally notdirty_write() is rather misleadingly named,
since it doesn't actually do a write, it just marks a notdirty
page as dirty.)
> + }
> +
> + return host;
The probe_access_internal() doc comment doesn't say that it
guarantees to set host to NULL for the TLB_MMIO/TLB_INVALID_MASK
cases, but we implicitly rely on it here.
> }
>
> +void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
> + MMUAccessType access_type, int mmu_idx)
> +{
> + void *host;
> + int flags;
> +
> + flags = probe_access_internal(env, addr, 0, access_type,
> + mmu_idx, true, &host, 0);
> +
> + /* No combination of flags are expected by the caller. */
> + return flags ? NULL : host;
> +}
>
> #ifdef CONFIG_PLUGIN
> /*
> diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
> index 4be78eb9b3..91c2dc46dd 100644
> --- a/accel/tcg/user-exec.c
> +++ b/accel/tcg/user-exec.c
> @@ -190,13 +190,12 @@ static inline int handle_cpu_signal(uintptr_t pc, siginfo_t *info,
> g_assert_not_reached();
> }
>
> -void *probe_access(CPUArchState *env, target_ulong addr, int size,
> - MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
> +int probe_access_flags(CPUArchState *env, target_ulong addr,
> + MMUAccessType access_type, int mmu_idx,
> + bool nonfault, void **phost, uintptr_t ra)
> {
> int flags;
>
> - g_assert(-(addr | TARGET_PAGE_MASK) >= size);
> -
> switch (access_type) {
> case MMU_DATA_STORE:
> flags = PAGE_WRITE;
> @@ -211,15 +210,30 @@ void *probe_access(CPUArchState *env, target_ulong addr, int size,
> g_assert_not_reached();
> }
>
> - if (!guest_addr_valid(addr) || page_check_range(addr, size, flags) < 0) {
> - CPUState *cpu = env_cpu(env);
> - CPUClass *cc = CPU_GET_CLASS(cpu);
> - cc->tlb_fill(cpu, addr, size, access_type, MMU_USER_IDX, false,
> - retaddr);
> - g_assert_not_reached();
> + if (!guest_addr_valid(addr) || page_check_range(addr, 1, flags) < 0) {
> + if (nonfault) {
> + *phost = NULL;
> + return TLB_INVALID_MASK;
> + } else {
> + CPUState *cpu = env_cpu(env);
> + CPUClass *cc = CPU_GET_CLASS(cpu);
> + cc->tlb_fill(cpu, addr, 0, access_type, MMU_USER_IDX, false, ra);
> + g_assert_not_reached();
> + }
> }
>
> - return size ? g2h(addr) : NULL;
> + *phost = g2h(addr);
> + return 0;
> +}
> +
> +void *probe_access(CPUArchState *env, target_ulong addr, int size,
> + MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
> +{
> + void *host;
> +
> + g_assert(-(addr | TARGET_PAGE_MASK) >= size);
> + probe_access_flags(env, addr, access_type, mmu_idx, false, &host, retaddr);
> + return host;
The old code returned NULL for a zero size; the new version does not.
The old code passed size into cc->tlb_fill; the new version does not.
The old code passed size into page_check_range(); the new version does not.
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn
2020-04-22 4:32 ` [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn Richard Henderson
@ 2020-04-27 10:51 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 10:51 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Use the "normal" memory access functions, rather than the
> softmmu internal helper functions directly.
>
> Since fb901c905dc3, cpu_mem_index is now a simple extract
> from env->hflags and not a large computation. Which means
> that it's now more work to pass around this value than it
> is to recompute it.
>
> This only adjusts the primitives, and does not clean up
> all of the uses within sve_helper.c.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup
2020-04-22 4:32 ` [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup Richard Henderson
@ 2020-04-27 11:00 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 11:00 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> For contiguous predicated memory operations, we want to
> minimize the number of tlb lookups performed. We have
> open-coded this for sve_ld1_r, but for correctness with
> MTE we will need this for all of the memory operations.
>
> Create a structure that holds the bounds of active elements,
> and metadata for two pages. Add routines to find those
> active elements, lookup the pages, and run watchpoints
> for those pages.
>
> Temporarily mark the functions unused to avoid Werror.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-22 4:33 ` [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads Richard Henderson
@ 2020-04-27 11:03 ` Peter Maydell
2020-04-27 16:16 ` Richard Henderson
0 siblings, 1 reply; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 11:03 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Wed, 22 Apr 2020 at 05:33, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> With sve_cont_ldst_pages, the differences between first-fault and no-fault
> are minimal, so unify the routines. With cpu_probe_watchpoint, we are able
> to make progress through pages with TLB_WATCHPOINT set when the watchpoint
> does not actually fire.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> /*
> - * Perform one normal read, which will fault or not.
> - * But it is likely to bring the page into the tlb.
> + * From this point on, all memory operations are MemSingleNF.
> + *
> + * Per the MemSingleNF pseudocode, a no-fault load from Device memory
> + * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
> + * If you map non-RAM with Normal memory attributes and do a NF
> + * load then it should access the bus -- but doing so is illegal.
> + *
> + * While we do not have access to the memory attributes from the PTE
> + * to tell Device memory from Normal memory, we can validly assume that
> + * non-RAM has been mapped as Device memory. Thus we indicate fault
> + * on all MMIO.
I still don't understand why this is right. All non-RAM is MMIO
but not all MMIO is non-RAM; so you might have something that's
MMIO (at least for the moment) and has been mapped Normal. That
shouldn't fault.
> + *
> + * Similarly, CPU_BP breakpoints would raise exceptions, and so
> + * return (UNKNOWN, FAULT). For simplicity, we consider gdb and
> + * architectural breakpoints the same.
> */
> - tlb_fn(env, vd, reg_off, addr + mem_off, retaddr);
> + if (unlikely(flags & TLB_MMIO)) {
> + goto do_fault;
> + }
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 04/18] accel/tcg: Add probe_access_flags
2020-04-27 10:48 ` Peter Maydell
@ 2020-04-27 16:00 ` Richard Henderson
2020-05-04 9:39 ` Peter Maydell
0 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-27 16:00 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-arm, QEMU Developers
On 4/27/20 3:48 AM, Peter Maydell wrote:
> probe_access() handles watchpoints. Why doesn't probe_access_flags()
> have to do that?
Because we are explicitly deferring that work to the caller. That's a good
fraction of the point of the new interface.
>> + /* Handle clean RAM pages. */
>> + if (flags & TLB_NOTDIRTY) {
>> + notdirty_write(env_cpu(env), addr, 1, iotlbentry, retaddr);
>> + }
>> +
>> + /* Handle watchpoints. */
>> + if (flags & TLB_WATCHPOINT) {
>> + int wp_access = (access_type == MMU_DATA_STORE
>> + ? BP_MEM_WRITE : BP_MEM_READ);
>> + cpu_check_watchpoint(env_cpu(env), addr, size,
>> + iotlbentry->attrs, wp_access, retaddr);
>> + }
>
> The old code checked for watchpoints first, and then handled notdirty-writes,
> which seems like the more correct order. Why has the new
> version switched them around?
Not an intentional change, but I shouldn't think it would matter in the end.
> The probe_access_internal() doc comment doesn't say that it
> guarantees to set host to NULL for the TLB_MMIO/TLB_INVALID_MASK
> cases, but we implicitly rely on it here.
Eh? probe_access_internal doesn't have a doc comment. Call that a bug if you
like, but you seem to be talking about something else.
>> +void *probe_access(CPUArchState *env, target_ulong addr, int size,
>> + MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
>> +{
>> + void *host;
>> +
>> + g_assert(-(addr | TARGET_PAGE_MASK) >= size);
>> + probe_access_flags(env, addr, access_type, mmu_idx, false, &host, retaddr);
>> + return host;
>
> The old code returned NULL for a zero size; the new version does not.
Granted.
> The old code passed size into cc->tlb_fill; the new version does not.
> The old code passed size into page_check_range(); the new version does not.
This is the user-only version, and size is not used for tlb_fill. It is only
trivially used in page_change_range; we have just verified that addr+size does
not cross a page boundary.
r~
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-27 11:03 ` Peter Maydell
@ 2020-04-27 16:16 ` Richard Henderson
2020-04-27 16:32 ` Peter Maydell
0 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-27 16:16 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-arm, QEMU Developers
On 4/27/20 4:03 AM, Peter Maydell wrote:
> On Wed, 22 Apr 2020 at 05:33, Richard Henderson
> <richard.henderson@linaro.org> wrote:
>>
>> With sve_cont_ldst_pages, the differences between first-fault and no-fault
>> are minimal, so unify the routines. With cpu_probe_watchpoint, we are able
>> to make progress through pages with TLB_WATCHPOINT set when the watchpoint
>> does not actually fire.
>>
>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
>
>
>> /*
>> - * Perform one normal read, which will fault or not.
>> - * But it is likely to bring the page into the tlb.
>> + * From this point on, all memory operations are MemSingleNF.
>> + *
>> + * Per the MemSingleNF pseudocode, a no-fault load from Device memory
>> + * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
>> + * If you map non-RAM with Normal memory attributes and do a NF
>> + * load then it should access the bus -- but doing so is illegal.
>> + *
>> + * While we do not have access to the memory attributes from the PTE
>> + * to tell Device memory from Normal memory, we can validly assume that
>> + * non-RAM has been mapped as Device memory. Thus we indicate fault
>> + * on all MMIO.
>
> I still don't understand why this is right. All non-RAM is MMIO
> but not all MMIO is non-RAM; so you might have something that's
> MMIO (at least for the moment) and has been mapped Normal. That
> shouldn't fault.
Everything that must go through the slow path has TLB_MMIO set.
What you're thinking of, romd, has TLB_MMIO set on the write comparator but not
the read comparator.
Have another browse through tlb_set_page_with_attrs, lines 859-893, and the
uses of is_romd.
r~
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-27 16:16 ` Richard Henderson
@ 2020-04-27 16:32 ` Peter Maydell
2020-04-27 16:45 ` Richard Henderson
0 siblings, 1 reply; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 16:32 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Mon, 27 Apr 2020 at 17:16, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 4/27/20 4:03 AM, Peter Maydell wrote:
> > On Wed, 22 Apr 2020 at 05:33, Richard Henderson
> > <richard.henderson@linaro.org> wrote:
> >>
> >> With sve_cont_ldst_pages, the differences between first-fault and no-fault
> >> are minimal, so unify the routines. With cpu_probe_watchpoint, we are able
> >> to make progress through pages with TLB_WATCHPOINT set when the watchpoint
> >> does not actually fire.
> >>
> >> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> >
> >
> >> /*
> >> - * Perform one normal read, which will fault or not.
> >> - * But it is likely to bring the page into the tlb.
> >> + * From this point on, all memory operations are MemSingleNF.
> >> + *
> >> + * Per the MemSingleNF pseudocode, a no-fault load from Device memory
> >> + * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
> >> + * If you map non-RAM with Normal memory attributes and do a NF
> >> + * load then it should access the bus -- but doing so is illegal.
> >> + *
> >> + * While we do not have access to the memory attributes from the PTE
> >> + * to tell Device memory from Normal memory, we can validly assume that
> >> + * non-RAM has been mapped as Device memory. Thus we indicate fault
> >> + * on all MMIO.
> >
> > I still don't understand why this is right. All non-RAM is MMIO
> > but not all MMIO is non-RAM; so you might have something that's
> > MMIO (at least for the moment) and has been mapped Normal. That
> > shouldn't fault.
>
> Everything that must go through the slow path has TLB_MMIO set.
Yes. But not everything that goes through the slow path is Device memory.
We can (should) fault on all accesses to Device memory, but we can't
fault on all accesses that are slow-pathed, because some of them could
be entirely valid Normal memory.
> What you're thinking of, romd, has TLB_MMIO set on the write comparator but not
> the read comparator.
True when the romd device is in 'romd mode', ie mr->romd_mode is
true. Otherwise memory_region_is_romd() returns false and
tlb_set_page_with_attrs() treats it like normal MMIO, because
both read and write must take the slow path. (For flash this
happens when it is put into programming mode and reads from
the memory region are no longer simple reads from the backing
host RAM.)
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-27 16:32 ` Peter Maydell
@ 2020-04-27 16:45 ` Richard Henderson
2020-04-27 18:38 ` Peter Maydell
0 siblings, 1 reply; 34+ messages in thread
From: Richard Henderson @ 2020-04-27 16:45 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-arm, QEMU Developers
On 4/27/20 9:32 AM, Peter Maydell wrote:
>>>> + * From this point on, all memory operations are MemSingleNF.
>>>> + *
>>>> + * Per the MemSingleNF pseudocode, a no-fault load from Device memory
>>>> + * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
>>>> + * If you map non-RAM with Normal memory attributes and do a NF
>>>> + * load then it should access the bus -- but doing so is illegal.
>>>> + *
>>>> + * While we do not have access to the memory attributes from the PTE
>>>> + * to tell Device memory from Normal memory, we can validly assume that
>>>> + * non-RAM has been mapped as Device memory. Thus we indicate fault
>>>> + * on all MMIO.
>>>
>>> I still don't understand why this is right. All non-RAM is MMIO
>>> but not all MMIO is non-RAM; so you might have something that's
>>> MMIO (at least for the moment) and has been mapped Normal. That
>>> shouldn't fault.
>>
>> Everything that must go through the slow path has TLB_MMIO set.
>
> Yes. But not everything that goes through the slow path is Device memory.
> We can (should) fault on all accesses to Device memory, but we can't
> fault on all accesses that are slow-pathed, because some of them could
> be entirely valid Normal memory.
We *can* indicate fault from MemSingleNF for any reason whatsoever, or no
reason whatsoever.
> // Implementation may suppress NF load for any reason
> if ConstrainUnpredictableBool(Unpredictable_NONFAULT) then
> return (bits(8*size) UNKNOWN, TRUE);
What I'm trying to talk about above, is the third statement in MemSingleNF,
> // Non-fault load from Device memory must not be performed externally
> if memaddrdesc.memattrs.memtype == MemType_Device then
> return (bits(8*size) UNKNOWN, TRUE);
and the reason we can't actually test MemType_Device here.
If you have better wording for that, I'm all ears. But I don't think there's
an actual bug here.
r~
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-27 16:45 ` Richard Henderson
@ 2020-04-27 18:38 ` Peter Maydell
2020-04-28 15:02 ` Richard Henderson
0 siblings, 1 reply; 34+ messages in thread
From: Peter Maydell @ 2020-04-27 18:38 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Mon, 27 Apr 2020 at 17:45, Richard Henderson
<richard.henderson@linaro.org> wrote:
> We *can* indicate fault from MemSingleNF for any reason whatsoever, or no
> reason whatsoever.
>
> > // Implementation may suppress NF load for any reason
> > if ConstrainUnpredictableBool(Unpredictable_NONFAULT) then
> > return (bits(8*size) UNKNOWN, TRUE);
>
> What I'm trying to talk about above, is the third statement in MemSingleNF,
>
> > // Non-fault load from Device memory must not be performed externally
> > if memaddrdesc.memattrs.memtype == MemType_Device then
> > return (bits(8*size) UNKNOWN, TRUE);
>
> and the reason we can't actually test MemType_Device here.
>
> If you have better wording for that, I'm all ears. But I don't think there's
> an actual bug here.
Oh, the comment didn't say you were relying on the operation being
allowed to return 'fail' for any reason; in particular the line about
"Normal memory [...] should access the bus" implies the opposite.
(I also missed the distinction here between "indicate fault" and "fault".)
But in that case you have the opposite problem, I think -- just because
something's backed by host memory doesn't mean the guest didn't
map it as Device: that case the architecture says must be indicated
as 'fault' but this code won't do it.
I would suggest something like:
+ * From this point on, all memory operations are MemSingleNF.
+ *
+ * Per the MemSingleNF pseudocode, a no-fault load from Device memory
+ * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
+ *
+ * Unfortuately we do not have access to the memory attributes from the PTE
+ * to tell Device memory from Normal memory. So we make a mostly
+ * correct check, and indicate (UNKNOWN, FAULT) for any MMIO.
+ * This gives the right answer for the common cases of "Normal memory,
+ * backed by host RAM" and "Device memory, backed by MMIO".
+ * The architecture allows us to suppress an NF load and return
+ * (UNKNOWN, FAULT) for any reason), so our behaviour (indicate
+ * fault) for the corner case of "Normal memory, backed by MMIO" is
+ * permitted. The case we get wrong is "Device memory, backed by
+ * host RAM", which we should return (UNKNOWN, FAULT) for but do not.
+ *
+ * Similarly, CPU_BP breakpoints would raise exceptions, and so
+ * return (UNKNOWN, FAULT). For simplicity, we consider gdb and
+ * architectural breakpoints the same.
assuming my understanding is correct...
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads
2020-04-27 18:38 ` Peter Maydell
@ 2020-04-28 15:02 ` Richard Henderson
0 siblings, 0 replies; 34+ messages in thread
From: Richard Henderson @ 2020-04-28 15:02 UTC (permalink / raw)
To: Peter Maydell; +Cc: qemu-arm, QEMU Developers
On 4/27/20 11:38 AM, Peter Maydell wrote:
> I would suggest something like:
>
> + * From this point on, all memory operations are MemSingleNF.
> + *
> + * Per the MemSingleNF pseudocode, a no-fault load from Device memory
> + * must not actually hit the bus -- it returns (UNKNOWN, FAULT) instead.
> + *
> + * Unfortuately we do not have access to the memory attributes from the PTE
> + * to tell Device memory from Normal memory. So we make a mostly
> + * correct check, and indicate (UNKNOWN, FAULT) for any MMIO.
> + * This gives the right answer for the common cases of "Normal memory,
> + * backed by host RAM" and "Device memory, backed by MMIO".
> + * The architecture allows us to suppress an NF load and return
> + * (UNKNOWN, FAULT) for any reason), so our behaviour (indicate
> + * fault) for the corner case of "Normal memory, backed by MMIO" is
> + * permitted. The case we get wrong is "Device memory, backed by
> + * host RAM", which we should return (UNKNOWN, FAULT) for but do not.
> + *
> + * Similarly, CPU_BP breakpoints would raise exceptions, and so
> + * return (UNKNOWN, FAULT). For simplicity, we consider gdb and
> + * architectural breakpoints the same.
>
> assuming my understanding is correct...
Yep, thanks. I'll merge this text.
r~
^ permalink raw reply [flat|nested] 34+ messages in thread
* Re: [PATCH v3 04/18] accel/tcg: Add probe_access_flags
2020-04-27 16:00 ` Richard Henderson
@ 2020-05-04 9:39 ` Peter Maydell
0 siblings, 0 replies; 34+ messages in thread
From: Peter Maydell @ 2020-05-04 9:39 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-arm, QEMU Developers
On Mon, 27 Apr 2020 at 17:00, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 4/27/20 3:48 AM, Peter Maydell wrote:
> > The old code passed size into cc->tlb_fill; the new version does not.
> > The old code passed size into page_check_range(); the new version does not.
>
> This is the user-only version, and size is not used for tlb_fill. It is only
> trivially used in page_change_range; we have just verified that addr+size does
> not cross a page boundary.
Yes, but:
* they're APIs which take sizes
* we have the size in hand so it's not difficult to pass it
* in future maybe those functions will change to make more use
of the size value, since they're being passed it
* this change ought to be a refactoring that does the same thing
the old code does
What's the reason for deliberately *not* passing the size and instead
using a constant 1 ?
thanks
-- PMM
^ permalink raw reply [flat|nested] 34+ messages in thread
end of thread, other threads:[~2020-05-04 9:40 UTC | newest]
Thread overview: 34+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-22 4:32 [PATCH v3 00/18] target/arm: sve load/store improvements Richard Henderson
2020-04-22 4:32 ` [PATCH v3 01/18] exec: Add block comments for watchpoint routines Richard Henderson
2020-04-27 9:27 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 02/18] exec: Fix cpu_watchpoint_address_matches address length Richard Henderson
2020-04-27 9:28 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 03/18] accel/tcg: Add block comment for probe_access Richard Henderson
2020-04-22 4:32 ` [PATCH v3 04/18] accel/tcg: Add probe_access_flags Richard Henderson
2020-04-27 10:48 ` Peter Maydell
2020-04-27 16:00 ` Richard Henderson
2020-05-04 9:39 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 05/18] accel/tcg: Add endian-specific cpu_{ld, st}* operations Richard Henderson
2020-04-27 9:46 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 06/18] target/arm: Use cpu_*_data_ra for sve_ldst_tlb_fn Richard Henderson
2020-04-27 10:51 ` Peter Maydell
2020-04-22 4:32 ` [PATCH v3 07/18] target/arm: Drop manual handling of set/clear_helper_retaddr Richard Henderson
2020-04-22 4:32 ` [PATCH v3 08/18] target/arm: Add sve infrastructure for page lookup Richard Henderson
2020-04-27 11:00 ` Peter Maydell
2020-04-22 4:33 ` [PATCH v3 09/18] target/arm: Adjust interface of sve_ld1_host_fn Richard Henderson
2020-04-22 4:33 ` [PATCH v3 10/18] target/arm: Use SVEContLdSt in sve_ld1_r Richard Henderson
2020-04-22 4:33 ` [PATCH v3 11/18] target/arm: Handle watchpoints " Richard Henderson
2020-04-22 4:33 ` [PATCH v3 12/18] target/arm: Use SVEContLdSt for multi-register contiguous loads Richard Henderson
2020-04-22 4:33 ` [PATCH v3 13/18] target/arm: Update contiguous first-fault and no-fault loads Richard Henderson
2020-04-27 11:03 ` Peter Maydell
2020-04-27 16:16 ` Richard Henderson
2020-04-27 16:32 ` Peter Maydell
2020-04-27 16:45 ` Richard Henderson
2020-04-27 18:38 ` Peter Maydell
2020-04-28 15:02 ` Richard Henderson
2020-04-22 4:33 ` [PATCH v3 14/18] target/arm: Use SVEContLdSt for contiguous stores Richard Henderson
2020-04-22 4:33 ` [PATCH v3 15/18] target/arm: Reuse sve_probe_page for gather first-fault loads Richard Henderson
2020-04-22 4:33 ` [PATCH v3 16/18] target/arm: Reuse sve_probe_page for scatter stores Richard Henderson
2020-04-22 4:33 ` [PATCH v3 17/18] target/arm: Reuse sve_probe_page for gather loads Richard Henderson
2020-04-22 4:33 ` [PATCH v3 18/18] target/arm: Remove sve_memopidx Richard Henderson
2020-04-22 5:37 ` [PATCH v3 00/18] target/arm: sve load/store improvements no-reply
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