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| author | Tao Su <tao1.su@linux.intel.com> | 2023-07-06 13:49:45 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-07-07 12:52:27 +0200 |
| commit | 9dd8b71091f47bac395f543779269c14d8d93c60 (patch) | |
| tree | 4092cdbf609190e98d5dc1c175f699c42000c63f /qemu-io-cmds.c | |
| parent | 8731336e90dea3dd04948127e775c9f087f97a4c (diff) | |
target/i386: Add support for MCDT_NO in CPUID enumeration
CPUID.(EAX=7,ECX=2):EDX[bit 5] enumerates MCDT_NO. Processors enumerate
this bit as 1 do not exhibit MXCSR Configuration Dependent Timing (MCDT)
behavior and do not need to be mitigated to avoid data-dependent behavior
for certain instructions.
Since MCDT_NO is in a new sub-leaf, add a new CPUID feature word
FEAT_7_2_EDX. Also update cpuid_level_func7 by FEAT_7_2_EDX.
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-ID: <20230706054949.66556-3-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'qemu-io-cmds.c')
0 files changed, 0 insertions, 0 deletions