diff options
| author | Cathy Zhang <cathy.zhang@intel.com> | 2020-07-06 07:17:16 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-07-10 19:26:55 -0400 |
| commit | b3c7344e338b04be9feaf7ac6693c2f7fc951b89 (patch) | |
| tree | 59c4411f3e118aaf5e20eea3044cb8af752f921f /target | |
| parent | 5dd13f2a5b4d7335b2b0924e6fb28b63b34e70fe (diff) | |
target/i386: Enable TSX Suspend Load Address Tracking feature
This instruction aims to give a way to choose which memory accesses
do not need to be tracked in the TSX read set, which is defined as
CPUID.(EAX=7,ECX=0):EDX[bit 16].
The release spec link is as follows:
https://software.intel.com/content/dam/develop/public/us/en/documents/\
architecture-instruction-set-extensions-programming-reference.pdf
The associated kvm patch link is as follows:
https://lore.kernel.org/patchwork/patch/1268026/
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Message-Id: <1593991036-12183-3-git-send-email-cathy.zhang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/i386/cpu.c | 2 | ||||
| -rw-r--r-- | target/i386/cpu.h | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index a05d3a641b..1e5123251d 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -987,7 +987,7 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = { NULL, NULL, NULL, NULL, "avx512-vp2intersect", NULL, "md-clear", NULL, NULL, NULL, "serialize", NULL, - NULL, NULL, NULL /* pconfig */, NULL, + "tsx-ldtrk", NULL, NULL /* pconfig */, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "spec-ctrl", "stibp", NULL, "arch-capabilities", "core-capability", "ssbd", diff --git a/target/i386/cpu.h b/target/i386/cpu.h index bd71fe3ef2..37fffa5cac 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -779,6 +779,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; #define CPUID_7_0_EDX_AVX512_VP2INTERSECT (1U << 8) /* SERIALIZE instruction */ #define CPUID_7_0_EDX_SERIALIZE (1U << 14) +/* TSX Suspend Load Address Tracking instruction */ +#define CPUID_7_0_EDX_TSX_LDTRK (1U << 16) /* Speculation Control */ #define CPUID_7_0_EDX_SPEC_CTRL (1U << 26) /* Single Thread Indirect Branch Predictors */ |