diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2019-11-20 13:19:22 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-11-21 16:35:05 +0100 |
| commit | 2a9758c51e2c2d13fc3845c3d603c11df98b8823 (patch) | |
| tree | 4cb8e2cf0dc975329d1447552b57c8c3fc4e9160 /target/i386/cpu.h | |
| parent | 0723cc8a5558c94388db75ae1f4991314914edd3 (diff) | |
target/i386: add support for MSR_IA32_TSX_CTRL
The MSR_IA32_TSX_CTRL MSR can be used to hide TSX (also known as the
Trusty Side-channel Extension). By virtualizing the MSR, KVM guests
can disable TSX and avoid paying the price of mitigating TSX-based
attacks on microarchitectural side channels.
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/cpu.h')
| -rw-r--r-- | target/i386/cpu.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 5352c9ff55..cde2a16b94 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -349,7 +349,11 @@ typedef enum X86Seg { #define MSR_VIRT_SSBD 0xc001011f #define MSR_IA32_PRED_CMD 0x49 #define MSR_IA32_CORE_CAPABILITY 0xcf + #define MSR_IA32_ARCH_CAPABILITIES 0x10a +#define ARCH_CAP_TSX_CTRL_MSR (1<<7) + +#define MSR_IA32_TSX_CTRL 0x122 #define MSR_IA32_TSCDEADLINE 0x6e0 #define FEATURE_CONTROL_LOCKED (1<<0) @@ -1449,6 +1453,7 @@ typedef struct CPUX86State { uint64_t msr_smi_count; uint32_t pkru; + uint32_t tsx_ctrl; uint64_t spec_ctrl; uint64_t virt_ssbd; |