mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

target/i386: Adjust feature level according to FEAT_7_1_EDX

Browse Source 
If FEAT_7_1_EAX is 0 and FEAT_7_1_EDX is non-zero, as is the case
with a Granite Rapids host and
'-cpu host,-avx-vnni,-avx512-bf16,-fzrm,-fsrs,-fsrc,-amx-fp16', we can't
get CPUID_7_1 leaf even though CPUID_7_1_EDX has non-zero value.

Update cpuid_level_func7 according to CPUID_7_1_EDX, otherwise
guest may report wrong maximum number sub-leaves in leaf 07H.

Fixes: eaaa197d5b ("target/i386: Add support for AVX-VNNI-INT8 in CPUID enumeration")
Cc: qemu-stable@nongnu.org
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-ID: <20230706054949.66556-2-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Tao Su 2023-07-06 13:49:44 +08:00 committed by Paolo Bonzini
parent ca2a5e630d
commit 8731336e90
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
target/i386/cpu.c
View File

@ -6880,6 +6880,7 @@ 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_EDX);
x86_cpu_adjust_feat_level(cpu, FEAT_8000_0001_EDX);
x86_cpu_adjust_feat_level(cpu, FEAT_8000_0001_ECX);
x86_cpu_adjust_feat_level(cpu, FEAT_8000_0007_EDX);