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-rw-r--r--arch/x86/include/asm/fpu/types.h16
-rw-r--r--arch/x86/include/asm/fpu/xstate.h6
-rw-r--r--arch/x86/kernel/fpu/xstate.c90
3 files changed, 61 insertions, 51 deletions
diff --git a/arch/x86/include/asm/fpu/types.h b/arch/x86/include/asm/fpu/types.h
index 7f6d858ff47a..eb810074f1e7 100644
--- a/arch/x86/include/asm/fpu/types.h
+++ b/arch/x86/include/asm/fpu/types.h
@@ -115,8 +115,8 @@ enum xfeature {
XFEATURE_PT_UNIMPLEMENTED_SO_FAR,
XFEATURE_PKRU,
XFEATURE_PASID,
- XFEATURE_RSRVD_COMP_11,
- XFEATURE_RSRVD_COMP_12,
+ XFEATURE_CET_USER,
+ XFEATURE_CET_KERNEL_UNUSED,
XFEATURE_RSRVD_COMP_13,
XFEATURE_RSRVD_COMP_14,
XFEATURE_LBR,
@@ -138,6 +138,8 @@ enum xfeature {
#define XFEATURE_MASK_PT (1 << XFEATURE_PT_UNIMPLEMENTED_SO_FAR)
#define XFEATURE_MASK_PKRU (1 << XFEATURE_PKRU)
#define XFEATURE_MASK_PASID (1 << XFEATURE_PASID)
+#define XFEATURE_MASK_CET_USER (1 << XFEATURE_CET_USER)
+#define XFEATURE_MASK_CET_KERNEL (1 << XFEATURE_CET_KERNEL_UNUSED)
#define XFEATURE_MASK_LBR (1 << XFEATURE_LBR)
#define XFEATURE_MASK_XTILE_CFG (1 << XFEATURE_XTILE_CFG)
#define XFEATURE_MASK_XTILE_DATA (1 << XFEATURE_XTILE_DATA)
@@ -253,6 +255,16 @@ struct pkru_state {
} __packed;
/*
+ * State component 11 is Control-flow Enforcement user states
+ */
+struct cet_user_state {
+ /* user control-flow settings */
+ u64 user_cet;
+ /* user shadow stack pointer */
+ u64 user_ssp;
+};
+
+/*
* State component 15: Architectural LBR configuration state.
* The size of Arch LBR state depends on the number of LBRs (lbr_depth).
*/
diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h
index cd3dd170e23a..d4427b88ee12 100644
--- a/arch/x86/include/asm/fpu/xstate.h
+++ b/arch/x86/include/asm/fpu/xstate.h
@@ -50,7 +50,8 @@
#define XFEATURE_MASK_USER_DYNAMIC XFEATURE_MASK_XTILE_DATA
/* All currently supported supervisor features */
-#define XFEATURE_MASK_SUPERVISOR_SUPPORTED (XFEATURE_MASK_PASID)
+#define XFEATURE_MASK_SUPERVISOR_SUPPORTED (XFEATURE_MASK_PASID | \
+ XFEATURE_MASK_CET_USER)
/*
* A supervisor state component may not always contain valuable information,
@@ -77,7 +78,8 @@
* Unsupported supervisor features. When a supervisor feature in this mask is
* supported in the future, move it to the supported supervisor feature mask.
*/
-#define XFEATURE_MASK_SUPERVISOR_UNSUPPORTED (XFEATURE_MASK_PT)
+#define XFEATURE_MASK_SUPERVISOR_UNSUPPORTED (XFEATURE_MASK_PT | \
+ XFEATURE_MASK_CET_KERNEL)
/* All supervisor states including supported and unsupported states. */
#define XFEATURE_MASK_SUPERVISOR_ALL (XFEATURE_MASK_SUPERVISOR_SUPPORTED | \
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 0bab497c9436..4fa4751912d9 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -39,26 +39,26 @@
*/
static const char *xfeature_names[] =
{
- "x87 floating point registers" ,
- "SSE registers" ,
- "AVX registers" ,
- "MPX bounds registers" ,
- "MPX CSR" ,
- "AVX-512 opmask" ,
- "AVX-512 Hi256" ,
- "AVX-512 ZMM_Hi256" ,
- "Processor Trace (unused)" ,
+ "x87 floating point registers",
+ "SSE registers",
+ "AVX registers",
+ "MPX bounds registers",
+ "MPX CSR",
+ "AVX-512 opmask",
+ "AVX-512 Hi256",
+ "AVX-512 ZMM_Hi256",
+ "Processor Trace (unused)",
"Protection Keys User registers",
"PASID state",
- "unknown xstate feature" ,
- "unknown xstate feature" ,
- "unknown xstate feature" ,
- "unknown xstate feature" ,
- "unknown xstate feature" ,
- "unknown xstate feature" ,
- "AMX Tile config" ,
- "AMX Tile data" ,
- "unknown xstate feature" ,
+ "Control-flow User registers",
+ "Control-flow Kernel registers (unused)",
+ "unknown xstate feature",
+ "unknown xstate feature",
+ "unknown xstate feature",
+ "unknown xstate feature",
+ "AMX Tile config",
+ "AMX Tile data",
+ "unknown xstate feature",
};
static unsigned short xsave_cpuid_features[] __initdata = {
@@ -73,6 +73,7 @@ static unsigned short xsave_cpuid_features[] __initdata = {
[XFEATURE_PT_UNIMPLEMENTED_SO_FAR] = X86_FEATURE_INTEL_PT,
[XFEATURE_PKRU] = X86_FEATURE_PKU,
[XFEATURE_PASID] = X86_FEATURE_ENQCMD,
+ [XFEATURE_CET_USER] = X86_FEATURE_SHSTK,
[XFEATURE_XTILE_CFG] = X86_FEATURE_AMX_TILE,
[XFEATURE_XTILE_DATA] = X86_FEATURE_AMX_TILE,
};
@@ -276,6 +277,7 @@ static void __init print_xstate_features(void)
print_xstate_feature(XFEATURE_MASK_Hi16_ZMM);
print_xstate_feature(XFEATURE_MASK_PKRU);
print_xstate_feature(XFEATURE_MASK_PASID);
+ print_xstate_feature(XFEATURE_MASK_CET_USER);
print_xstate_feature(XFEATURE_MASK_XTILE_CFG);
print_xstate_feature(XFEATURE_MASK_XTILE_DATA);
}
@@ -344,6 +346,7 @@ static __init void os_xrstor_booting(struct xregs_state *xstate)
XFEATURE_MASK_BNDREGS | \
XFEATURE_MASK_BNDCSR | \
XFEATURE_MASK_PASID | \
+ XFEATURE_MASK_CET_USER | \
XFEATURE_MASK_XTILE)
/*
@@ -446,14 +449,15 @@ static void __init __xstate_dump_leaves(void)
} \
} while (0)
-#define XCHECK_SZ(sz, nr, nr_macro, __struct) do { \
- if ((nr == nr_macro) && \
- WARN_ONCE(sz != sizeof(__struct), \
- "%s: struct is %zu bytes, cpu state %d bytes\n", \
- __stringify(nr_macro), sizeof(__struct), sz)) { \
+#define XCHECK_SZ(sz, nr, __struct) ({ \
+ if (WARN_ONCE(sz != sizeof(__struct), \
+ "[%s]: struct is %zu bytes, cpu state %d bytes\n", \
+ xfeature_names[nr], sizeof(__struct), sz)) { \
__xstate_dump_leaves(); \
} \
-} while (0)
+ true; \
+})
+
/**
* check_xtile_data_against_struct - Check tile data state size.
@@ -527,36 +531,28 @@ static bool __init check_xstate_against_struct(int nr)
* Ask the CPU for the size of the state.
*/
int sz = xfeature_size(nr);
+
/*
* Match each CPU state with the corresponding software
* structure.
*/
- XCHECK_SZ(sz, nr, XFEATURE_YMM, struct ymmh_struct);
- XCHECK_SZ(sz, nr, XFEATURE_BNDREGS, struct mpx_bndreg_state);
- XCHECK_SZ(sz, nr, XFEATURE_BNDCSR, struct mpx_bndcsr_state);
- 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);
- XCHECK_SZ(sz, nr, XFEATURE_PASID, struct ia32_pasid_state);
- XCHECK_SZ(sz, nr, XFEATURE_XTILE_CFG, struct xtile_cfg);
-
- /* The tile data size varies between implementations. */
- if (nr == XFEATURE_XTILE_DATA)
- check_xtile_data_against_struct(sz);
-
- /*
- * Make *SURE* to add any feature numbers in below if
- * there are "holes" in the xsave state component
- * numbers.
- */
- if ((nr < XFEATURE_YMM) ||
- (nr >= XFEATURE_MAX) ||
- (nr == XFEATURE_PT_UNIMPLEMENTED_SO_FAR) ||
- ((nr >= XFEATURE_RSRVD_COMP_11) && (nr <= XFEATURE_RSRVD_COMP_16))) {
+ switch (nr) {
+ case XFEATURE_YMM: return XCHECK_SZ(sz, nr, struct ymmh_struct);
+ case XFEATURE_BNDREGS: return XCHECK_SZ(sz, nr, struct mpx_bndreg_state);
+ case XFEATURE_BNDCSR: return XCHECK_SZ(sz, nr, struct mpx_bndcsr_state);
+ case XFEATURE_OPMASK: return XCHECK_SZ(sz, nr, struct avx_512_opmask_state);
+ case XFEATURE_ZMM_Hi256: return XCHECK_SZ(sz, nr, struct avx_512_zmm_uppers_state);
+ case XFEATURE_Hi16_ZMM: return XCHECK_SZ(sz, nr, struct avx_512_hi16_state);
+ case XFEATURE_PKRU: return XCHECK_SZ(sz, nr, struct pkru_state);
+ case XFEATURE_PASID: return XCHECK_SZ(sz, nr, struct ia32_pasid_state);
+ case XFEATURE_XTILE_CFG: return XCHECK_SZ(sz, nr, struct xtile_cfg);
+ case XFEATURE_CET_USER: return XCHECK_SZ(sz, nr, struct cet_user_state);
+ case XFEATURE_XTILE_DATA: check_xtile_data_against_struct(sz); return true;
+ default:
XSTATE_WARN_ON(1, "No structure for xstate: %d\n", nr);
return false;
}
+
return true;
}
generated by cgit (git 2.34.1) at 2025-03-17 10:26:56 +0000