diff options
| -rw-r--r-- | arch/x86/include/asm/fpu/types.h | 11 | ||||
| -rw-r--r-- | arch/x86/include/asm/fpu/xstate.h | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 7 |
3 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h index aad3181c9b7b..36b90bbfc69f 100644 --- a/arch/x86/include/asm/fpu/types.h +++ b/arch/x86/include/asm/fpu/types.h @@ -109,6 +109,7 @@ enum xfeature { XFEATURE_ZMM_Hi256, XFEATURE_Hi16_ZMM, XFEATURE_PT_UNIMPLEMENTED_SO_FAR, + XFEATURE_PKRU, XFEATURE_MAX, }; @@ -121,6 +122,7 @@ enum xfeature { #define XFEATURE_MASK_OPMASK (1 << XFEATURE_OPMASK) #define XFEATURE_MASK_ZMM_Hi256 (1 << XFEATURE_ZMM_Hi256) #define XFEATURE_MASK_Hi16_ZMM (1 << XFEATURE_Hi16_ZMM) +#define XFEATURE_MASK_PKRU (1 << XFEATURE_PKRU) #define XFEATURE_MASK_FPSSE (XFEATURE_MASK_FP | XFEATURE_MASK_SSE) #define XFEATURE_MASK_AVX512 (XFEATURE_MASK_OPMASK \ @@ -213,6 +215,15 @@ struct avx_512_hi16_state { struct reg_512_bit hi16_zmm[16]; } __packed; +/* + * State component 9: 32-bit PKRU register. The state is + * 8 bytes long but only 4 bytes is used currently. + */ +struct pkru_state { + u32 pkru; + u32 pad; +} __packed; + struct xstate_header { u64 xfeatures; u64 xcomp_bv; diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index af30fdeb140d..9994d4229002 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -28,7 +28,8 @@ XFEATURE_MASK_YMM | \ XFEATURE_MASK_OPMASK | \ XFEATURE_MASK_ZMM_Hi256 | \ - XFEATURE_MASK_Hi16_ZMM) + XFEATURE_MASK_Hi16_ZMM | \ + XFEATURE_MASK_PKRU) /* All currently supported features */ #define XCNTXT_MASK (XFEATURE_MASK_LAZY | XFEATURE_MASK_EAGER) diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index c2e2349dbcfe..a63ca80fa723 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -29,6 +29,8 @@ static const char *xfeature_names[] = "AVX-512 Hi256" , "AVX-512 ZMM_Hi256" , "Processor Trace (unused)" , + "Protection Keys User registers", + "unknown xstate feature" , }; /* @@ -58,6 +60,7 @@ void fpu__xstate_clear_all_cpu_caps(void) setup_clear_cpu_cap(X86_FEATURE_AVX512CD); setup_clear_cpu_cap(X86_FEATURE_MPX); setup_clear_cpu_cap(X86_FEATURE_XGETBV1); + setup_clear_cpu_cap(X86_FEATURE_PKU); } /* @@ -236,7 +239,7 @@ static void __init print_xstate_feature(u64 xstate_mask) const char *feature_name; if (cpu_has_xfeatures(xstate_mask, &feature_name)) - pr_info("x86/fpu: Supporting XSAVE feature 0x%02Lx: '%s'\n", xstate_mask, feature_name); + pr_info("x86/fpu: Supporting XSAVE feature 0x%03Lx: '%s'\n", xstate_mask, feature_name); } /* @@ -252,6 +255,7 @@ static void __init print_xstate_features(void) print_xstate_feature(XFEATURE_MASK_OPMASK); print_xstate_feature(XFEATURE_MASK_ZMM_Hi256); print_xstate_feature(XFEATURE_MASK_Hi16_ZMM); + print_xstate_feature(XFEATURE_MASK_PKRU); } /* @@ -468,6 +472,7 @@ static void check_xstate_against_struct(int nr) XCHECK_SZ(sz, nr, XFEATURE_OPMASK, struct avx_512_opmask_state); XCHECK_SZ(sz, nr, XFEATURE_ZMM_Hi256, struct avx_512_zmm_uppers_state); XCHECK_SZ(sz, nr, XFEATURE_Hi16_ZMM, struct avx_512_hi16_state); + XCHECK_SZ(sz, nr, XFEATURE_PKRU, struct pkru_state); /* * Make *SURE* to add any feature numbers in below if |