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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-02-22 19:17:52 -1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-06-26 17:33:00 +0200 |
| commit | 58e8f1f616d117aed6283690419dc16f53b7a202 (patch) | |
| tree | 51c033440c2b72c4ca9d72fc868371257909063c /include/exec/cpu-all.h | |
| parent | 97e1576957c28a5fbcc810f92643e52069cc49b7 (diff) | |
| download | focaccia-qemu-58e8f1f616d117aed6283690419dc16f53b7a202.tar.gz focaccia-qemu-58e8f1f616d117aed6283690419dc16f53b7a202.zip | |
accel/tcg: Store some tlb flags in CPUTLBEntryFull
We have run out of bits we can use within the CPUTLBEntry comparators, as TLB_FLAGS_MASK cannot overlap alignment. Store slow_flags[] in CPUTLBEntryFull, and merge with the flags from the comparator. A new TLB_FORCE_SLOW bit is set within the comparator as an indication that the slow path must be used. Move TLB_BSWAP to TLB_SLOW_FLAGS_MASK. Since we are out of bits, we cannot create a new bit without moving an old one. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'include/exec/cpu-all.h')
| -rw-r--r-- | include/exec/cpu-all.h | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/include/exec/cpu-all.h b/include/exec/cpu-all.h index 09bf4c0cc6..4422f4bb07 100644 --- a/include/exec/cpu-all.h +++ b/include/exec/cpu-all.h @@ -327,17 +327,30 @@ CPUArchState *cpu_copy(CPUArchState *env); #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 TLB entry requires byte swap. */ -#define TLB_BSWAP (1 << (TARGET_PAGE_BITS_MIN - 5)) +/* 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. */ #define TLB_DISCARD_WRITE (1 << (TARGET_PAGE_BITS_MIN - 6)) -/* Use this mask to check interception with an alignment mask +/* + * 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 \ - | TLB_WATCHPOINT | TLB_BSWAP | TLB_DISCARD_WRITE) + | TLB_WATCHPOINT | TLB_FORCE_SLOW | TLB_DISCARD_WRITE) + +/* + * Flags stored in CPUTLBEntryFull.slow_flags[x]. + * TLB_FORCE_SLOW must be set in CPUTLBEntry.addr_idx[x]. + */ +/* Set if TLB entry requires byte swap. */ +#define TLB_BSWAP (1 << 0) + +#define TLB_SLOW_FLAGS_MASK TLB_BSWAP + +/* The two sets of flags must not overlap. */ +QEMU_BUILD_BUG_ON(TLB_FLAGS_MASK & TLB_SLOW_FLAGS_MASK); /** * tlb_hit_page: return true if page aligned @addr is a hit against the |