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accel/tcg: Move TLB_WATCHPOINT to TLB_SLOW_FLAGS_MASK 

This frees up one bit of the primary tlb flags without
impacting the TLB_NOTDIRTY logic.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-02-22 23:09:43 -10:00
parent 58e8f1f616
commit 187ba69453
2 changed files with 18 additions and 8 deletions
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18
accel/tcg/cputlb.c
View File

@ -1981,7 +1981,7 @@ static void *atomic_mmu_lookup(CPUArchState *env, vaddr addr, MemOpIdx oi,
*/
goto stop_the_world;
}
/* Collect TLB_WATCHPOINT for read. */
/* Collect tlb flags for read. */
tlb_addr |= tlbe->addr_read;
/* Notice an IO access or a needs-MMU-lookup access */
@ -1998,9 +1998,19 @@ static void *atomic_mmu_lookup(CPUArchState *env, vaddr addr, MemOpIdx oi,
notdirty_write(env_cpu(env), addr, size, full, retaddr);
}
if (unlikely(tlb_addr & TLB_WATCHPOINT)) {
cpu_check_watchpoint(env_cpu(env), addr, size, full->attrs,
BP_MEM_READ | BP_MEM_WRITE, retaddr);
if (unlikely(tlb_addr & TLB_FORCE_SLOW)) {
int wp_flags = 0;
if (full->slow_flags[MMU_DATA_STORE] & TLB_WATCHPOINT) {
wp_flags |= BP_MEM_WRITE;
}
if (full->slow_flags[MMU_DATA_LOAD] & TLB_WATCHPOINT) {
wp_flags |= BP_MEM_READ;
}
if (wp_flags) {
cpu_check_watchpoint(env_cpu(env), addr, size,
full->attrs, wp_flags, retaddr);
}
}
return hostaddr;

8
include/exec/cpu-all.h
View File

@ -325,8 +325,6 @@ CPUArchState *cpu_copy(CPUArchState *env);
#define TLB_NOTDIRTY (1 << (TARGET_PAGE_BITS_MIN - 2))
/* Set if TLB entry is an IO callback. */
#define TLB_MMIO (1 << (TARGET_PAGE_BITS_MIN - 3))
/* Set if TLB entry contains a watchpoint. */
#define TLB_WATCHPOINT (1 << (TARGET_PAGE_BITS_MIN - 4))
/* Set if the slow path must be used; more flags in CPUTLBEntryFull. */
#define TLB_FORCE_SLOW (1 << (TARGET_PAGE_BITS_MIN - 5))
/* Set if TLB entry writes ignored. */
@ -338,7 +336,7 @@ CPUArchState *cpu_copy(CPUArchState *env);
*/
#define TLB_FLAGS_MASK \
(TLB_INVALID_MASK | TLB_NOTDIRTY | TLB_MMIO \
| TLB_WATCHPOINT | TLB_FORCE_SLOW | TLB_DISCARD_WRITE)
| TLB_FORCE_SLOW | TLB_DISCARD_WRITE)
/*
* Flags stored in CPUTLBEntryFull.slow_flags[x].
@ -346,8 +344,10 @@ CPUArchState *cpu_copy(CPUArchState *env);
*/
/* Set if TLB entry requires byte swap. */
#define TLB_BSWAP (1 << 0)
/* Set if TLB entry contains a watchpoint. */
#define TLB_WATCHPOINT (1 << 1)
#define TLB_SLOW_FLAGS_MASK TLB_BSWAP
#define TLB_SLOW_FLAGS_MASK (TLB_BSWAP | TLB_WATCHPOINT)
/* The two sets of flags must not overlap. */
QEMU_BUILD_BUG_ON(TLB_FLAGS_MASK & TLB_SLOW_FLAGS_MASK);