diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2019-08-24 09:51:09 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-09-03 08:30:39 -0700 |
| commit | 50b107c5d617eaf93301cef20221312e7a986701 (patch) | |
| tree | 8ff2f1b256e9847308d30c90fc431d91023e45d1 /include | |
| parent | 5787585d0406cfd54dda0c71ea1a603347ce6e71 (diff) | |
cputlb: Handle watchpoints via TLB_WATCHPOINT
The raising of exceptions from check_watchpoint, buried inside
of the I/O subsystem, is fundamentally broken. We do not have
the helper return address with which we can unwind guest state.
Replace PHYS_SECTION_WATCH and io_mem_watch with TLB_WATCHPOINT.
Move the call to cpu_check_watchpoint into the cputlb helpers
where we do have the helper return address.
This allows watchpoints on RAM to bypass the full i/o access path.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/cpu-all.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 8d07ae23a5..d2d443c4f9 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -329,11 +329,14 @@ CPUArchState *cpu_copy(CPUArchState *env); #define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS - 2)) /* Set if TLB entry is an IO callback. */ #define TLB_MMIO (1 << (TARGET_PAGE_BITS - 3)) +/* Set if TLB entry contains a watchpoint. */ +#define TLB_WATCHPOINT (1 << (TARGET_PAGE_BITS - 4)) /* Use this mask to check interception with an alignment mask * in a TCG backend. */ -#define TLB_FLAGS_MASK (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO) +#define TLB_FLAGS_MASK \ + (TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO | TLB_WATCHPOINT) /** * tlb_hit_page: return true if page aligned @addr is a hit against the |