x86/fpu: Rename XSAVE macros

There are two concepts that have some confusing naming:
 1. Extended State Component numbers (currently called
    XFEATURE_BIT_*)
 2. Extended State Component masks (currently called XSTATE_*)

The numbers are (currently) from 0-9.  State component 3 is the
bounds registers for MPX, for instance.

But when we want to enable "state component 3", we go set a bit
in XCR0.  The bit we set is 1<<3.  We can check to see if a
state component feature is enabled by looking at its bit.

The current 'xfeature_bit's are at best xfeature bit _numbers_.
Calling them bits is at best inconsistent with ending the enum
list with 'XFEATURES_NR_MAX'.

This patch renames the enum to be 'xfeature'.  These also
happen to be what the Intel documentation calls a "state
component".

We also want to differentiate these from the "XSTATE_*" macros.
The "XSTATE_*" macros are a mask, and we rename them to match.

These macros are reasonably widely used so this patch is a
wee bit big, but this really is just a rename.

The only non-mechanical part of this is the

	s/XSTATE_EXTEND_MASK/XFEATURE_MASK_EXTEND/

We need a better name for it, but that's another patch.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: dave@sr71.net
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/20150902233126.38653250@viggo.jf.intel.com
[ Ported to v4.3-rc1. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/crypto/camellia_aesni_avx2_glue.c

@@ -567,7 +567,8 @@ static int __init camellia_aesni_init(void)
 		return -ENODEV;
 	}
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/camellia_aesni_avx_glue.c

@@ -554,7 +554,8 @@ static int __init camellia_aesni_init(void)
 {
 	const char *feature_name;
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/cast5_avx_glue.c

@@ -469,7 +469,8 @@ static int __init cast5_init(void)
 {
 	const char *feature_name;
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/cast6_avx_glue.c

@@ -591,7 +591,8 @@ static int __init cast6_init(void)
 {
 	const char *feature_name;
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/chacha20_glue.c

@@ -130,7 +130,7 @@ static int __init chacha20_simd_mod_init(void)
 
 #ifdef CONFIG_AS_AVX2
 	chacha20_use_avx2 = cpu_has_avx && cpu_has_avx2 &&
-			    cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL);
+			    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
 #endif
 	return crypto_register_alg(&alg);
 }

arch/x86/crypto/poly1305_glue.c

@@ -184,7 +184,7 @@ static int __init poly1305_simd_mod_init(void)
 
 #ifdef CONFIG_AS_AVX2
 	poly1305_use_avx2 = cpu_has_avx && cpu_has_avx2 &&
-			    cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL);
+			    cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL);
 	alg.descsize = sizeof(struct poly1305_simd_desc_ctx);
 	if (poly1305_use_avx2)
 		alg.descsize += 10 * sizeof(u32);

arch/x86/crypto/serpent_avx2_glue.c

@@ -542,7 +542,8 @@ static int __init init(void)
 		pr_info("AVX2 instructions are not detected.\n");
 		return -ENODEV;
 	}
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/serpent_avx_glue.c

@@ -597,7 +597,8 @@ static int __init serpent_init(void)
 {
 	const char *feature_name;
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
+				&feature_name)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/crypto/sha1_ssse3_glue.c

@@ -121,7 +121,7 @@ static struct shash_alg alg = {
 #ifdef CONFIG_AS_AVX
 static bool __init avx_usable(void)
 {
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
 		if (cpu_has_avx)
 			pr_info("AVX detected but unusable.\n");
 		return false;

arch/x86/crypto/sha256_ssse3_glue.c

@@ -130,7 +130,7 @@ static struct shash_alg algs[] = { {
 #ifdef CONFIG_AS_AVX
 static bool __init avx_usable(void)
 {
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
 		if (cpu_has_avx)
 			pr_info("AVX detected but unusable.\n");
 		return false;

arch/x86/crypto/sha512_ssse3_glue.c

@@ -129,7 +129,7 @@ static struct shash_alg algs[] = { {
 #ifdef CONFIG_AS_AVX
 static bool __init avx_usable(void)
 {
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, NULL)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
 		if (cpu_has_avx)
 			pr_info("AVX detected but unusable.\n");
 		return false;

arch/x86/crypto/twofish_avx_glue.c

@@ -558,7 +558,7 @@ static int __init twofish_init(void)
 {
 	const char *feature_name;
 
-	if (!cpu_has_xfeatures(XSTATE_SSE | XSTATE_YMM, &feature_name)) {
+	if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
 		pr_info("CPU feature '%s' is not supported.\n", feature_name);
 		return -ENODEV;
 	}

arch/x86/include/asm/fpu/types.h

@@ -95,30 +95,36 @@ struct swregs_state {
 /*
  * List of XSAVE features Linux knows about:
  */
-enum xfeature_bit {
-	XSTATE_BIT_FP,
-	XSTATE_BIT_SSE,
-	XSTATE_BIT_YMM,
-	XSTATE_BIT_BNDREGS,
-	XSTATE_BIT_BNDCSR,
-	XSTATE_BIT_OPMASK,
-	XSTATE_BIT_ZMM_Hi256,
-	XSTATE_BIT_Hi16_ZMM,
+enum xfeature {
+	XFEATURE_FP,
+	XFEATURE_SSE,
+	/*
+	 * Values above here are "legacy states".
+	 * Those below are "extended states".
+	 */
+	XFEATURE_YMM,
+	XFEATURE_BNDREGS,
+	XFEATURE_BNDCSR,
+	XFEATURE_OPMASK,
+	XFEATURE_ZMM_Hi256,
+	XFEATURE_Hi16_ZMM,
 
 	XFEATURES_NR_MAX,
 };
 
-#define XSTATE_FP		(1 << XSTATE_BIT_FP)
-#define XSTATE_SSE		(1 << XSTATE_BIT_SSE)
-#define XSTATE_YMM		(1 << XSTATE_BIT_YMM)
-#define XSTATE_BNDREGS		(1 << XSTATE_BIT_BNDREGS)
-#define XSTATE_BNDCSR		(1 << XSTATE_BIT_BNDCSR)
-#define XSTATE_OPMASK		(1 << XSTATE_BIT_OPMASK)
-#define XSTATE_ZMM_Hi256	(1 << XSTATE_BIT_ZMM_Hi256)
-#define XSTATE_Hi16_ZMM		(1 << XSTATE_BIT_Hi16_ZMM)
+#define XFEATURE_MASK_FP		(1 << XFEATURE_FP)
+#define XFEATURE_MASK_SSE		(1 << XFEATURE_SSE)
+#define XFEATURE_MASK_YMM		(1 << XFEATURE_YMM)
+#define XFEATURE_MASK_BNDREGS		(1 << XFEATURE_BNDREGS)
+#define XFEATURE_MASK_BNDCSR		(1 << XFEATURE_BNDCSR)
+#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 XSTATE_FPSSE		(XSTATE_FP | XSTATE_SSE)
-#define XSTATE_AVX512		(XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
+#define XFEATURE_MASK_FPSSE		(XFEATURE_MASK_FP | XFEATURE_MASK_SSE)
+#define XFEATURE_MASK_AVX512		(XFEATURE_MASK_OPMASK \
+					 | XFEATURE_MASK_ZMM_Hi256 \
+					 | XFEATURE_MASK_Hi16_ZMM)
 
 /*
  * There are 16x 256-bit AVX registers named YMM0-YMM15.

arch/x86/include/asm/fpu/xstate.h

@@ -6,7 +6,7 @@
 #include <linux/uaccess.h>
 
 /* Bit 63 of XCR0 is reserved for future expansion */
-#define XSTATE_EXTEND_MASK	(~(XSTATE_FPSSE | (1ULL << 63)))
+#define XFEATURE_MASK_EXTEND	(~(XFEATURE_MASK_FPSSE | (1ULL << 63)))
 
 #define XSTATE_CPUID		0x0000000d
 
@@ -19,14 +19,18 @@
 #define XSAVE_YMM_OFFSET    (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
 
 /* Supported features which support lazy state saving */
-#define XSTATE_LAZY	(XSTATE_FP | XSTATE_SSE | XSTATE_YMM		      \
-			| XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM)
+#define XFEATURE_MASK_LAZY	(XFEATURE_MASK_FP | \
+				 XFEATURE_MASK_SSE | \
+				 XFEATURE_MASK_YMM | \
+				 XFEATURE_MASK_OPMASK |	\
+				 XFEATURE_MASK_ZMM_Hi256 | \
+				 XFEATURE_MASK_Hi16_ZMM)
 
 /* Supported features which require eager state saving */
-#define XSTATE_EAGER	(XSTATE_BNDREGS | XSTATE_BNDCSR)
+#define XFEATURE_MASK_EAGER	(XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR)
 
 /* All currently supported features */
-#define XCNTXT_MASK	(XSTATE_LAZY | XSTATE_EAGER)
+#define XCNTXT_MASK	(XFEATURE_MASK_LAZY | XFEATURE_MASK_EAGER)
 
 #ifdef CONFIG_X86_64
 #define REX_PREFIX	"0x48, "

arch/x86/kernel/fpu/init.c

@@ -290,11 +290,11 @@ static void __init fpu__init_system_ctx_switch(void)
 	if (cpu_has_xsaveopt && eagerfpu != DISABLE)
 		eagerfpu = ENABLE;
 
-	if (xfeatures_mask & XSTATE_EAGER) {
+	if (xfeatures_mask & XFEATURE_MASK_EAGER) {
 		if (eagerfpu == DISABLE) {
 			pr_err("x86/fpu: eagerfpu switching disabled, disabling the following xstate features: 0x%llx.\n",
-			       xfeatures_mask & XSTATE_EAGER);
-			xfeatures_mask &= ~XSTATE_EAGER;
+			       xfeatures_mask & XFEATURE_MASK_EAGER);
+			xfeatures_mask &= ~XFEATURE_MASK_EAGER;
 		} else {
 			eagerfpu = ENABLE;
 		}

arch/x86/kernel/fpu/regset.c

@@ -66,7 +66,7 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset,
 	 * presence of FP and SSE state.
 	 */
 	if (cpu_has_xsave)
-		fpu->state.xsave.header.xfeatures |= XSTATE_FPSSE;
+		fpu->state.xsave.header.xfeatures |= XFEATURE_MASK_FPSSE;
 
 	return ret;
 }
@@ -326,7 +326,7 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset,
 	 * presence of FP.
 	 */
 	if (cpu_has_xsave)
-		fpu->state.xsave.header.xfeatures |= XSTATE_FP;
+		fpu->state.xsave.header.xfeatures |= XFEATURE_MASK_FP;
 	return ret;
 }
 

arch/x86/kernel/fpu/signal.c

@@ -107,7 +107,7 @@ static inline int save_xstate_epilog(void __user *buf, int ia32_frame)
 	 * header as well as change any contents in the memory layout.
 	 * xrestore as part of sigreturn will capture all the changes.
 	 */
-	xfeatures |= XSTATE_FPSSE;
+	xfeatures |= XFEATURE_MASK_FPSSE;
 
 	err |= __put_user(xfeatures, (__u32 *)&x->header.xfeatures);
 
@@ -207,7 +207,7 @@ sanitize_restored_xstate(struct task_struct *tsk,
 		 * layout and not enabled by the OS.
 		 */
 		if (fx_only)
-			header->xfeatures = XSTATE_FPSSE;
+			header->xfeatures = XFEATURE_MASK_FPSSE;
 		else
 			header->xfeatures &= (xfeatures_mask & xfeatures);
 	}
@@ -230,7 +230,7 @@ static inline int copy_user_to_fpregs_zeroing(void __user *buf, u64 xbv, int fx_
 {
 	if (use_xsave()) {
 		if ((unsigned long)buf % 64 || fx_only) {
-			u64 init_bv = xfeatures_mask & ~XSTATE_FPSSE;
+			u64 init_bv = xfeatures_mask & ~XFEATURE_MASK_FPSSE;
 			copy_kernel_to_xregs(&init_fpstate.xsave, init_bv);
 			return copy_user_to_fxregs(buf);
 		} else {

arch/x86/kernel/fpu/xstate.c

@@ -72,7 +72,7 @@ int cpu_has_xfeatures(u64 xfeatures_needed, const char **feature_name)
 		/*
 		 * So we use FLS here to be able to print the most advanced
 		 * feature that was requested but is missing. So if a driver
-		 * asks about "XSTATE_SSE | XSTATE_YMM" we'll print the
+		 * asks about "XFEATURE_MASK_SSE | XFEATURE_MASK_YMM" we'll print the
 		 * missing AVX feature - this is the most informative message
 		 * to users:
 		 */
@@ -131,7 +131,7 @@ void fpstate_sanitize_xstate(struct fpu *fpu)
 	/*
 	 * FP is in init state
 	 */
-	if (!(xfeatures & XSTATE_FP)) {
+	if (!(xfeatures & XFEATURE_MASK_FP)) {
 		fx->cwd = 0x37f;
 		fx->swd = 0;
 		fx->twd = 0;
@@ -144,7 +144,7 @@ void fpstate_sanitize_xstate(struct fpu *fpu)
 	/*
 	 * SSE is in init state
 	 */
-	if (!(xfeatures & XSTATE_SSE))
+	if (!(xfeatures & XFEATURE_MASK_SSE))
 		memset(&fx->xmm_space[0], 0, 256);
 
 	/*
@@ -223,14 +223,14 @@ static void __init print_xstate_feature(u64 xstate_mask)
  */
 static void __init print_xstate_features(void)
 {
-	print_xstate_feature(XSTATE_FP);
-	print_xstate_feature(XSTATE_SSE);
-	print_xstate_feature(XSTATE_YMM);
-	print_xstate_feature(XSTATE_BNDREGS);
-	print_xstate_feature(XSTATE_BNDCSR);
-	print_xstate_feature(XSTATE_OPMASK);
-	print_xstate_feature(XSTATE_ZMM_Hi256);
-	print_xstate_feature(XSTATE_Hi16_ZMM);
+	print_xstate_feature(XFEATURE_MASK_FP);
+	print_xstate_feature(XFEATURE_MASK_SSE);
+	print_xstate_feature(XFEATURE_MASK_YMM);
+	print_xstate_feature(XFEATURE_MASK_BNDREGS);
+	print_xstate_feature(XFEATURE_MASK_BNDCSR);
+	print_xstate_feature(XFEATURE_MASK_OPMASK);
+	print_xstate_feature(XFEATURE_MASK_ZMM_Hi256);
+	print_xstate_feature(XFEATURE_MASK_Hi16_ZMM);
 }
 
 /*
@@ -365,7 +365,11 @@ static int init_xstate_size(void)
 	return 0;
 }
 
-void fpu__init_disable_system_xstate(void)
+/*
+ * We enabled the XSAVE hardware, but something went wrong and
+ * we can not use it.  Disable it.
+ */
+static void fpu__init_disable_system_xstate(void)
 {
 	xfeatures_mask = 0;
 	cr4_clear_bits(X86_CR4_OSXSAVE);
@@ -398,7 +402,7 @@ void __init fpu__init_system_xstate(void)
 	cpuid_count(XSTATE_CPUID, 0, &eax, &ebx, &ecx, &edx);
 	xfeatures_mask = eax + ((u64)edx << 32);
 
-	if ((xfeatures_mask & XSTATE_FPSSE) != XSTATE_FPSSE) {
+	if ((xfeatures_mask & XFEATURE_MASK_FPSSE) != XFEATURE_MASK_FPSSE) {
 		pr_err("x86/fpu: FP/SSE not present amongst the CPU's xstate features: 0x%llx.\n", xfeatures_mask);
 		BUG();
 	}
@@ -451,7 +455,7 @@ void fpu__resume_cpu(void)
  * Inputs:
  *	xstate: the thread's storage area for all FPU data
  *	xstate_feature: state which is defined in xsave.h (e.g.
- *	XSTATE_FP, XSTATE_SSE, etc...)
+ *	XFEATURE_MASK_FP, XFEATURE_MASK_SSE, etc...)
  * Output:
  *	address of the state in the xsave area, or NULL if the
  *	field is not present in the xsave buffer.
@@ -502,8 +506,8 @@ EXPORT_SYMBOL_GPL(get_xsave_addr);
  * Note that this only works on the current task.
  *
  * Inputs:
- *	@xsave_state: state which is defined in xsave.h (e.g. XSTATE_FP,
- *	XSTATE_SSE, etc...)
+ *	@xsave_state: state which is defined in xsave.h (e.g. XFEATURE_MASK_FP,
+ *	XFEATURE_MASK_SSE, etc...)
  * Output:
  *	address of the state in the xsave area or NULL if the state
  *	is not present or is in its 'init state'.

arch/x86/kernel/traps.c

@@ -384,7 +384,7 @@ dotraplinkage void do_bounds(struct pt_regs *regs, long error_code)
 	 * which is all zeros which indicates MPX was not
 	 * responsible for the exception.
 	 */
-	bndcsr = get_xsave_field_ptr(XSTATE_BNDCSR);
+	bndcsr = get_xsave_field_ptr(XFEATURE_MASK_BNDCSR);
 	if (!bndcsr)
 		goto exit_trap;
 

arch/x86/kvm/cpuid.c

@@ -30,7 +30,7 @@ static u32 xstate_required_size(u64 xstate_bv, bool compacted)
 	int feature_bit = 0;
 	u32 ret = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
 
-	xstate_bv &= XSTATE_EXTEND_MASK;
+	xstate_bv &= XFEATURE_MASK_EXTEND;
 	while (xstate_bv) {
 		if (xstate_bv & 0x1) {
 		        u32 eax, ebx, ecx, edx, offset;
@@ -51,7 +51,7 @@ u64 kvm_supported_xcr0(void)
 	u64 xcr0 = KVM_SUPPORTED_XCR0 & host_xcr0;
 
 	if (!kvm_x86_ops->mpx_supported())
-		xcr0 &= ~(XSTATE_BNDREGS | XSTATE_BNDCSR);
+		xcr0 &= ~(XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR);
 
 	return xcr0;
 }

arch/x86/kvm/x86.c

@@ -662,9 +662,9 @@ static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
 	/* Only support XCR_XFEATURE_ENABLED_MASK(xcr0) now  */
 	if (index != XCR_XFEATURE_ENABLED_MASK)
 		return 1;
-	if (!(xcr0 & XSTATE_FP))
+	if (!(xcr0 & XFEATURE_MASK_FP))
 		return 1;
-	if ((xcr0 & XSTATE_YMM) && !(xcr0 & XSTATE_SSE))
+	if ((xcr0 & XFEATURE_MASK_YMM) && !(xcr0 & XFEATURE_MASK_SSE))
 		return 1;
 
 	/*
@@ -672,23 +672,24 @@ static int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr)
 	 * saving.  However, xcr0 bit 0 is always set, even if the
 	 * emulated CPU does not support XSAVE (see fx_init).
 	 */
-	valid_bits = vcpu->arch.guest_supported_xcr0 | XSTATE_FP;
+	valid_bits = vcpu->arch.guest_supported_xcr0 | XFEATURE_MASK_FP;
 	if (xcr0 & ~valid_bits)
 		return 1;
 
-	if ((!(xcr0 & XSTATE_BNDREGS)) != (!(xcr0 & XSTATE_BNDCSR)))
+	if ((!(xcr0 & XFEATURE_MASK_BNDREGS)) !=
+	    (!(xcr0 & XFEATURE_MASK_BNDCSR)))
 		return 1;
 
-	if (xcr0 & XSTATE_AVX512) {
-		if (!(xcr0 & XSTATE_YMM))
+	if (xcr0 & XFEATURE_MASK_AVX512) {
+		if (!(xcr0 & XFEATURE_MASK_YMM))
 			return 1;
-		if ((xcr0 & XSTATE_AVX512) != XSTATE_AVX512)
+		if ((xcr0 & XFEATURE_MASK_AVX512) != XFEATURE_MASK_AVX512)
 			return 1;
 	}
 	kvm_put_guest_xcr0(vcpu);
 	vcpu->arch.xcr0 = xcr0;
 
-	if ((xcr0 ^ old_xcr0) & XSTATE_EXTEND_MASK)
+	if ((xcr0 ^ old_xcr0) & XFEATURE_MASK_EXTEND)
 		kvm_update_cpuid(vcpu);
 	return 0;
 }
@@ -2906,7 +2907,7 @@ static void fill_xsave(u8 *dest, struct kvm_vcpu *vcpu)
 	 * Copy each region from the possibly compacted offset to the
 	 * non-compacted offset.
 	 */
-	valid = xstate_bv & ~XSTATE_FPSSE;
+	valid = xstate_bv & ~XFEATURE_MASK_FPSSE;
 	while (valid) {
 		u64 feature = valid & -valid;
 		int index = fls64(feature) - 1;
@@ -2944,7 +2945,7 @@ static void load_xsave(struct kvm_vcpu *vcpu, u8 *src)
 	 * Copy each region from the non-compacted offset to the
 	 * possibly compacted offset.
 	 */
-	valid = xstate_bv & ~XSTATE_FPSSE;
+	valid = xstate_bv & ~XFEATURE_MASK_FPSSE;
 	while (valid) {
 		u64 feature = valid & -valid;
 		int index = fls64(feature) - 1;
@@ -2972,7 +2973,7 @@ static void kvm_vcpu_ioctl_x86_get_xsave(struct kvm_vcpu *vcpu,
 			&vcpu->arch.guest_fpu.state.fxsave,
 			sizeof(struct fxregs_state));
 		*(u64 *)&guest_xsave->region[XSAVE_HDR_OFFSET / sizeof(u32)] =
-			XSTATE_FPSSE;
+			XFEATURE_MASK_FPSSE;
 	}
 }
 
@@ -2992,7 +2993,7 @@ static int kvm_vcpu_ioctl_x86_set_xsave(struct kvm_vcpu *vcpu,
 			return -EINVAL;
 		load_xsave(vcpu, (u8 *)guest_xsave->region);
 	} else {
-		if (xstate_bv & ~XSTATE_FPSSE)
+		if (xstate_bv & ~XFEATURE_MASK_FPSSE)
 			return -EINVAL;
 		memcpy(&vcpu->arch.guest_fpu.state.fxsave,
 			guest_xsave->region, sizeof(struct fxregs_state));
@@ -7001,7 +7002,7 @@ static void fx_init(struct kvm_vcpu *vcpu)
 	/*
 	 * Ensure guest xcr0 is valid for loading
 	 */
-	vcpu->arch.xcr0 = XSTATE_FP;
+	vcpu->arch.xcr0 = XFEATURE_MASK_FP;
 
 	vcpu->arch.cr0 |= X86_CR0_ET;
 }

arch/x86/kvm/x86.h

@@ -180,9 +180,9 @@ int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
 					  int page_num);
 
-#define KVM_SUPPORTED_XCR0     (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \
-				| XSTATE_BNDREGS | XSTATE_BNDCSR \
-				| XSTATE_AVX512)
+#define KVM_SUPPORTED_XCR0     (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
+				| XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
+				| XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512)
 extern u64 host_xcr0;
 
 extern u64 kvm_supported_xcr0(void);

arch/x86/mm/mpx.c

@@ -258,7 +258,7 @@ siginfo_t *mpx_generate_siginfo(struct pt_regs *regs)
 		goto err_out;
 	}
 	/* get bndregs field from current task's xsave area */
-	bndregs = get_xsave_field_ptr(XSTATE_BNDREGS);
+	bndregs = get_xsave_field_ptr(XFEATURE_MASK_BNDREGS);
 	if (!bndregs) {
 		err = -EINVAL;
 		goto err_out;
@@ -315,7 +315,7 @@ static __user void *mpx_get_bounds_dir(void)
 	 * The bounds directory pointer is stored in a register
 	 * only accessible if we first do an xsave.
 	 */
-	bndcsr = get_xsave_field_ptr(XSTATE_BNDCSR);
+	bndcsr = get_xsave_field_ptr(XFEATURE_MASK_BNDCSR);
 	if (!bndcsr)
 		return MPX_INVALID_BOUNDS_DIR;
 
@@ -492,7 +492,7 @@ static int do_mpx_bt_fault(void)
 	const struct bndcsr *bndcsr;
 	struct mm_struct *mm = current->mm;
 
-	bndcsr = get_xsave_field_ptr(XSTATE_BNDCSR);
+	bndcsr = get_xsave_field_ptr(XFEATURE_MASK_BNDCSR);
 	if (!bndcsr)
 		return -EINVAL;
 	/*