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| author | Richard Henderson <richard.henderson@linaro.org> | 2023-05-17 21:16:05 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-05-23 16:49:33 -0700 |
| commit | a48b6afea4c6c7bbfa355eb732b9b97bf1d43d67 (patch) | |
| tree | cb1f70c6b946119bf89dda6ad5d8e126459e9b58 | |
| parent | 6bc12fd04243a5bfe28bc5d6ed8b0a7ed40f5de4 (diff) | |
| download | qemu-a48b6afea4c6c7bbfa355eb732b9b97bf1d43d67.zip qemu-a48b6afea4c6c7bbfa355eb732b9b97bf1d43d67.tar.gz qemu-a48b6afea4c6c7bbfa355eb732b9b97bf1d43d67.tar.bz2 | |
util: Add i386 CPUINFO_ATOMIC_VMOVDQU
Add a bit to indicate when VMOVDQU is also atomic if aligned.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
| -rw-r--r-- | host/include/i386/host/cpuinfo.h | 1 | ||||
| -rw-r--r-- | util/cpuinfo-i386.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/host/include/i386/host/cpuinfo.h b/host/include/i386/host/cpuinfo.h index e6f7461..a653712 100644 --- a/host/include/i386/host/cpuinfo.h +++ b/host/include/i386/host/cpuinfo.h @@ -25,6 +25,7 @@ #define CPUINFO_AVX512DQ (1u << 14) #define CPUINFO_AVX512VBMI2 (1u << 15) #define CPUINFO_ATOMIC_VMOVDQA (1u << 16) +#define CPUINFO_ATOMIC_VMOVDQU (1u << 17) /* Initialized with a constructor. */ extern unsigned cpuinfo; diff --git a/util/cpuinfo-i386.c b/util/cpuinfo-i386.c index 434319a..ab6143d 100644 --- a/util/cpuinfo-i386.c +++ b/util/cpuinfo-i386.c @@ -77,8 +77,10 @@ unsigned __attribute__((constructor)) cpuinfo_init(void) * See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104688 */ __cpuid(0, a, b, c, d); - if (c == signature_INTEL_ecx || c == signature_AMD_ecx) { + if (c == signature_INTEL_ecx) { info |= CPUINFO_ATOMIC_VMOVDQA; + } else if (c == signature_AMD_ecx) { + info |= CPUINFO_ATOMIC_VMOVDQA | CPUINFO_ATOMIC_VMOVDQU; } } } |