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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>
This commit is contained in:
Dave Hansen 2015-09-02 16:31:26 -07:00 committed by Ingo Molnar
parent 75933433d6
commit d91cab7813
23 changed files with 103 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/crypto/camellia_aesni_avx2_glue.c
View File

@ -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;
}

3
arch/x86/crypto/camellia_aesni_avx_glue.c
View File

@ -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;
}

3
arch/x86/crypto/cast5_avx_glue.c
View File

@ -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;
}

3
arch/x86/crypto/cast6_avx_glue.c
View File

@ -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;
}

2
arch/x86/crypto/chacha20_glue.c
View File

@ -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);
}

2
arch/x86/crypto/poly1305_glue.c
View File

@ -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);

3
arch/x86/crypto/serpent_avx2_glue.c
View File

@ -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;
}

3
arch/x86/crypto/serpent_avx_glue.c
View File

@ -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;
}

2
arch/x86/crypto/sha1_ssse3_glue.c
View File

@ -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;

2
arch/x86/crypto/sha256_ssse3_glue.c
View File

@ -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;

2
arch/x86/crypto/sha512_ssse3_glue.c
View File

@ -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;

2
arch/x86/crypto/twofish_avx_glue.c
View File

@ -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;
}

44
arch/x86/include/asm/fpu/types.h
View File

@ -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.

14
arch/x86/include/asm/fpu/xstate.h
View File

@ -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, "

6
arch/x86/kernel/fpu/init.c
View File

@ -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;
}

4
arch/x86/kernel/fpu/regset.c
View File

@ -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;
}

6
arch/x86/kernel/fpu/signal.c
View File

@ -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 {

36
arch/x86/kernel/fpu/xstate.c
View File

@ -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'.

2
arch/x86/kernel/traps.c
View File

@ -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;

4
arch/x86/kvm/cpuid.c
View File

@ -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;
}

27
arch/x86/kvm/x86.c
View File

@ -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;
}

6
arch/x86/kvm/x86.h
View File

@ -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);

6
arch/x86/mm/mpx.c
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@ -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;
/*