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| author | Xin Li (Intel) <xin@zytor.com> | 2025-01-03 00:48:26 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2025-06-03 22:42:46 +0200 |
| commit | 99216748fd4e2b25dc0a7609e8a4fecea4c3eaf4 (patch) | |
| tree | a3c6a0b0bfacd3534cac8c1dd3d8f8886452e484 | |
| parent | 0b901459a87a7fdbed36e574aae33e0635a3e9af (diff) | |
| download | qemu-99216748fd4e2b25dc0a7609e8a4fecea4c3eaf4.zip qemu-99216748fd4e2b25dc0a7609e8a4fecea4c3eaf4.tar.gz qemu-99216748fd4e2b25dc0a7609e8a4fecea4c3eaf4.tar.bz2 | |
target/i386: Add a new CPU feature word for CPUID.7.1.ECX
The immediate form of MSR access instructions will use this new CPU
feature word.
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
Link: https://lore.kernel.org/r/20250103084827.1820007-3-xin@zytor.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | target/i386/cpu.c | 23 | ||||
| -rw-r--r-- | target/i386/cpu.h | 1 |
2 files changed, 23 insertions, 1 deletions
diff --git a/target/i386/cpu.c b/target/i386/cpu.c index 7340350..b05f465 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -900,6 +900,7 @@ void x86_cpu_vendor_words2str(char *dst, uint32_t vendor1, #define TCG_7_1_EAX_FEATURES (CPUID_7_1_EAX_FZRM | CPUID_7_1_EAX_FSRS | \ CPUID_7_1_EAX_FSRC | CPUID_7_1_EAX_CMPCCXADD) +#define TCG_7_1_ECX_FEATURES 0 #define TCG_7_1_EDX_FEATURES 0 #define TCG_7_2_EDX_FEATURES 0 #define TCG_APM_FEATURES 0 @@ -1150,6 +1151,25 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = { }, .tcg_features = TCG_7_1_EAX_FEATURES, }, + [FEAT_7_1_ECX] = { + .type = CPUID_FEATURE_WORD, + .feat_names = { + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + NULL, NULL, NULL, NULL, + }, + .cpuid = { + .eax = 7, + .needs_ecx = true, .ecx = 1, + .reg = R_ECX, + }, + .tcg_features = TCG_7_1_ECX_FEATURES, + }, [FEAT_7_1_EDX] = { .type = CPUID_FEATURE_WORD, .feat_names = { @@ -7442,9 +7462,9 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count, *edx = env->features[FEAT_7_0_EDX]; /* Feature flags */ } else if (count == 1) { *eax = env->features[FEAT_7_1_EAX]; + *ecx = env->features[FEAT_7_1_ECX]; *edx = env->features[FEAT_7_1_EDX]; *ebx = 0; - *ecx = 0; } else if (count == 2) { *edx = env->features[FEAT_7_2_EDX]; *eax = 0; @@ -8349,6 +8369,7 @@ void x86_cpu_expand_features(X86CPU *cpu, Error **errp) x86_cpu_adjust_feat_level(cpu, FEAT_6_EAX); x86_cpu_adjust_feat_level(cpu, FEAT_7_0_ECX); x86_cpu_adjust_feat_level(cpu, FEAT_7_1_EAX); + x86_cpu_adjust_feat_level(cpu, FEAT_7_1_ECX); x86_cpu_adjust_feat_level(cpu, FEAT_7_1_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_7_2_EDX); x86_cpu_adjust_feat_level(cpu, FEAT_8000_0001_EDX); diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 1146465..0ec1cbd 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -668,6 +668,7 @@ typedef enum FeatureWord { FEAT_SGX_12_1_EAX, /* CPUID[EAX=0x12,ECX=1].EAX (SGX ATTRIBUTES[31:0]) */ FEAT_XSAVE_XSS_LO, /* CPUID[EAX=0xd,ECX=1].ECX */ FEAT_XSAVE_XSS_HI, /* CPUID[EAX=0xd,ECX=1].EDX */ + FEAT_7_1_ECX, /* CPUID[EAX=7,ECX=1].ECX */ FEAT_7_1_EDX, /* CPUID[EAX=7,ECX=1].EDX */ FEAT_7_2_EDX, /* CPUID[EAX=7,ECX=2].EDX */ FEAT_24_0_EBX, /* CPUID[EAX=0x24,ECX=0].EBX */ |