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x86/cpufeature: Replace cpu_has_xsaves with boot_cpu_has() usage 

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <kvm@vger.kernel.org>
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: 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>
Link: http://lkml.kernel.org/r/1459801503-15600-11-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Borislav Petkov 2016-04-04 22:25:03 +02:00 committed by Ingo Molnar
parent d366bf7eb9
commit 782511b00f
4 changed files with 8 additions and 14 deletions
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6
arch/x86/include/asm/cpufeature.h
View File

@ -118,12 +118,6 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
set_bit(bit, (unsigned long *)cpu_caps_set); \
} while (0)
#define cpu_has_xsaves boot_cpu_has(X86_FEATURE_XSAVES)
/*
* Do not add any more of those clumsy macros - use static_cpu_has() for
* fast paths and boot_cpu_has() otherwise!
*/
#if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_X86_FAST_FEATURE_TESTS)
/*
* Static testing of CPU features. Used the same as boot_cpu_has().

10
arch/x86/kernel/fpu/xstate.c
View File

@ -280,7 +280,7 @@ static void __init setup_xstate_comp(void)
xstate_comp_offsets[0] = 0;
xstate_comp_offsets[1] = offsetof(struct fxregs_state, xmm_space);
if (!cpu_has_xsaves) {
if (!boot_cpu_has(X86_FEATURE_XSAVES)) {
for (i = FIRST_EXTENDED_XFEATURE; i < XFEATURE_MAX; i++) {
if (xfeature_enabled(i)) {
xstate_comp_offsets[i] = xstate_offsets[i];
@ -322,7 +322,7 @@ static void __init setup_init_fpu_buf(void)
setup_xstate_features();
print_xstate_features();
if (cpu_has_xsaves) {
if (boot_cpu_has(X86_FEATURE_XSAVES)) {
init_fpstate.xsave.header.xcomp_bv = (u64)1 << 63 | xfeatures_mask;
init_fpstate.xsave.header.xfeatures = xfeatures_mask;
}
@ -417,7 +417,7 @@ static int xfeature_size(int xfeature_nr)
*/
static int using_compacted_format(void)
{
return cpu_has_xsaves;
return boot_cpu_has(X86_FEATURE_XSAVES);
}
static void __xstate_dump_leaves(void)
@ -549,7 +549,7 @@ static unsigned int __init calculate_xstate_size(void)
unsigned int eax, ebx, ecx, edx;
unsigned int calculated_xstate_size;
if (!cpu_has_xsaves) {
if (!boot_cpu_has(X86_FEATURE_XSAVES)) {
/*
* - CPUID function 0DH, sub-function 0:
* EBX enumerates the size (in bytes) required by
@ -667,7 +667,7 @@ void __init fpu__init_system_xstate(void)
pr_info("x86/fpu: Enabled xstate features 0x%llx, context size is %d bytes, using '%s' format.\n",
xfeatures_mask,
xstate_size,
cpu_has_xsaves ? "compacted" : "standard");
boot_cpu_has(X86_FEATURE_XSAVES) ? "compacted" : "standard");
}
/*

2
arch/x86/kvm/vmx.c
View File

@ -3386,7 +3386,7 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
}
}
if (cpu_has_xsaves)
if (boot_cpu_has(X86_FEATURE_XSAVES))
rdmsrl(MSR_IA32_XSS, host_xss);
return 0;

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

@ -3095,7 +3095,7 @@ static void load_xsave(struct kvm_vcpu *vcpu, u8 *src)
/* Set XSTATE_BV and possibly XCOMP_BV. */
xsave->header.xfeatures = xstate_bv;
if (cpu_has_xsaves)
if (boot_cpu_has(X86_FEATURE_XSAVES))
xsave->header.xcomp_bv = host_xcr0 | XSTATE_COMPACTION_ENABLED;
/*
@ -7292,7 +7292,7 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
static void fx_init(struct kvm_vcpu *vcpu)
{
fpstate_init(&vcpu->arch.guest_fpu.state);
if (cpu_has_xsaves)
if (boot_cpu_has(X86_FEATURE_XSAVES))
vcpu->arch.guest_fpu.state.xsave.header.xcomp_bv =
host_xcr0 | XSTATE_COMPACTION_ENABLED;