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x86: Support XFD and AMX xsave data migration

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XFD(eXtended Feature Disable) allows to enable a
feature on xsave state while preventing specific
user threads from using the feature.

Support save and restore XFD MSRs if CPUID.D.1.EAX[4]
enumerate to be valid. Likewise migrate the MSRs and
related xsave state necessarily.

Signed-off-by: Zeng Guang <guang.zeng@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220217060434.52460-8-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Zeng Guang 2022-02-16 22:04:33 -08:00 • committed by Paolo Bonzini
parent e56dd3c70a
commit cdec2b753b
3 changed files with 73 additions and 0 deletions
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9
target/i386/cpu.h
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@ -507,6 +507,9 @@ typedef enum X86Seg {
#define MSR_VM_HSAVE_PA 0xc0010117
#define MSR_IA32_XFD 0x000001c4
#define MSR_IA32_XFD_ERR 0x000001c5
#define MSR_IA32_BNDCFGS 0x00000d90
#define MSR_IA32_XSS 0x00000da0
#define MSR_IA32_UMWAIT_CONTROL 0xe1
@ -872,6 +875,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS];
#define CPUID_7_1_EAX_AVX_VNNI (1U << 4)
/* AVX512 BFloat16 Instruction */
#define CPUID_7_1_EAX_AVX512_BF16 (1U << 5)
/* XFD Extend Feature Disabled */
#define CPUID_D_1_EAX_XFD (1U << 4)
/* Packets which contain IP payload have LIP values */
#define CPUID_14_0_ECX_LIP (1U << 31)
@ -1616,6 +1621,10 @@ typedef struct CPUArchState {
uint64_t msr_rtit_cr3_match;
uint64_t msr_rtit_addrs[MAX_RTIT_ADDRS];
/* Per-VCPU XFD MSRs */
uint64_t msr_xfd;
uint64_t msr_xfd_err;
/* exception/interrupt handling */
int error_code;
int exception_is_int;