[v4] Move rom and notdirty handling to cputlb

[PATCH v4 16/16] cputlb: Pass retaddr to tb_check_watchpoint

Posted by Richard Henderson 6 years, 4 months ago

Fixes the previous TLB_WATCHPOINT patches because we are currently
failing to set cpu->mem_io_pc with the call to cpu_check_watchpoint.
Pass down the retaddr directly because it's readily available.

Fixes: 50b107c5d61
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 accel/tcg/translate-all.h | 2 +-
 accel/tcg/translate-all.c | 6 +++---
 exec.c                    | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/accel/tcg/translate-all.h b/accel/tcg/translate-all.h
index 135c1ea96a..a557b4e2bb 100644
--- a/accel/tcg/translate-all.h
+++ b/accel/tcg/translate-all.h
@@ -30,7 +30,7 @@ void tb_invalidate_phys_page_fast(struct page_collection *pages,
                                   tb_page_addr_t start, int len,
                                   uintptr_t retaddr);
 void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end);
-void tb_check_watchpoint(CPUState *cpu);
+void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr);
 
 #ifdef CONFIG_USER_ONLY
 int page_unprotect(target_ulong address, uintptr_t pc);
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index db77fb221b..66d4bc4341 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -2142,16 +2142,16 @@ static bool tb_invalidate_phys_page(tb_page_addr_t addr, uintptr_t pc)
 #endif
 
 /* user-mode: call with mmap_lock held */
-void tb_check_watchpoint(CPUState *cpu)
+void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr)
 {
     TranslationBlock *tb;
 
     assert_memory_lock();
 
-    tb = tcg_tb_lookup(cpu->mem_io_pc);
+    tb = tcg_tb_lookup(retaddr);
     if (tb) {
         /* We can use retranslation to find the PC.  */
-        cpu_restore_state_from_tb(cpu, tb, cpu->mem_io_pc, true);
+        cpu_restore_state_from_tb(cpu, tb, retaddr, true);
         tb_phys_invalidate(tb, -1);
     } else {
         /* The exception probably happened in a helper.  The CPU state should
diff --git a/exec.c b/exec.c
index b3df826039..8a0a6613b1 100644
--- a/exec.c
+++ b/exec.c
@@ -2758,7 +2758,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
                 cpu->watchpoint_hit = wp;
 
                 mmap_lock();
-                tb_check_watchpoint(cpu);
+                tb_check_watchpoint(cpu, ra);
                 if (wp->flags & BP_STOP_BEFORE_ACCESS) {
                     cpu->exception_index = EXCP_DEBUG;
                     mmap_unlock();
-- 
2.17.1

Re: [PATCH v4 16/16] cputlb: Pass retaddr to tb_check_watchpoint

Posted by Alex Bennée 6 years, 4 months ago

Richard Henderson <richard.henderson@linaro.org> writes:

> Fixes the previous TLB_WATCHPOINT patches because we are currently
> failing to set cpu->mem_io_pc with the call to cpu_check_watchpoint.
> Pass down the retaddr directly because it's readily available.
>
> Fixes: 50b107c5d61
> Reviewed-by: David Hildenbrand <david@redhat.com>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

> ---
>  accel/tcg/translate-all.h | 2 +-
>  accel/tcg/translate-all.c | 6 +++---
>  exec.c                    | 2 +-
>  3 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/accel/tcg/translate-all.h b/accel/tcg/translate-all.h
> index 135c1ea96a..a557b4e2bb 100644
> --- a/accel/tcg/translate-all.h
> +++ b/accel/tcg/translate-all.h
> @@ -30,7 +30,7 @@ void tb_invalidate_phys_page_fast(struct page_collection *pages,
>                                    tb_page_addr_t start, int len,
>                                    uintptr_t retaddr);
>  void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end);
> -void tb_check_watchpoint(CPUState *cpu);
> +void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr);
>
>  #ifdef CONFIG_USER_ONLY
>  int page_unprotect(target_ulong address, uintptr_t pc);
> diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
> index db77fb221b..66d4bc4341 100644
> --- a/accel/tcg/translate-all.c
> +++ b/accel/tcg/translate-all.c
> @@ -2142,16 +2142,16 @@ static bool tb_invalidate_phys_page(tb_page_addr_t addr, uintptr_t pc)
>  #endif
>
>  /* user-mode: call with mmap_lock held */
> -void tb_check_watchpoint(CPUState *cpu)
> +void tb_check_watchpoint(CPUState *cpu, uintptr_t retaddr)
>  {
>      TranslationBlock *tb;
>
>      assert_memory_lock();
>
> -    tb = tcg_tb_lookup(cpu->mem_io_pc);
> +    tb = tcg_tb_lookup(retaddr);
>      if (tb) {
>          /* We can use retranslation to find the PC.  */
> -        cpu_restore_state_from_tb(cpu, tb, cpu->mem_io_pc, true);
> +        cpu_restore_state_from_tb(cpu, tb, retaddr, true);
>          tb_phys_invalidate(tb, -1);
>      } else {
>          /* The exception probably happened in a helper.  The CPU state should
> diff --git a/exec.c b/exec.c
> index b3df826039..8a0a6613b1 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -2758,7 +2758,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
>                  cpu->watchpoint_hit = wp;
>
>                  mmap_lock();
> -                tb_check_watchpoint(cpu);
> +                tb_check_watchpoint(cpu, ra);
>                  if (wp->flags & BP_STOP_BEFORE_ACCESS) {
>                      cpu->exception_index = EXCP_DEBUG;
>                      mmap_unlock();


--
Alex Bennée