linux-kernel - [tip:x86/asm] x86/cpufeature: Replace cpu_has_xsaves with boot_cpu

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Message-ID: <tip-782511b00f749cfebc0cb5d6ce960de5410c221d@git.kernel.org>
Date:	Wed, 13 Apr 2016 04:40:35 -0700
From:	tip-bot for Borislav Petkov <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	brgerst@...il.com, luto@...capital.net,
	torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org, dvlasenk@...hat.com, tglx@...utronix.de,
	bp@...en8.de, mingo@...nel.org, hpa@...or.com,
	peterz@...radead.org, bp@...e.de
Subject: [tip:x86/asm] x86/cpufeature: Replace cpu_has_xsaves with
 boot_cpu_has() usage

Commit-ID:  782511b00f749cfebc0cb5d6ce960de5410c221d
Gitweb:     http://git.kernel.org/tip/782511b00f749cfebc0cb5d6ce960de5410c221d
Author:     Borislav Petkov <bp@...e.de>
AuthorDate: Mon, 4 Apr 2016 22:25:03 +0200
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 13 Apr 2016 11:37:42 +0200

x86/cpufeature: Replace cpu_has_xsaves with boot_cpu_has() usage

Signed-off-by: Borislav Petkov <bp@...e.de>
Cc: <kvm@...r.kernel.org>
Cc: Andy Lutomirski <luto@...capital.net>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/1459801503-15600-11-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/include/asm/cpufeature.h |  6 ------
 arch/x86/kernel/fpu/xstate.c      | 10 +++++-----
 arch/x86/kvm/vmx.c                |  2 +-
 arch/x86/kvm/x86.c                |  4 ++--
 4 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 732a00f..07c942d 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -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().
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c
index 18b9fd8..4ea2a59 100644
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -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");
 }
 
 /*
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index ee1c8a9..d5908bd 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -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;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4eb2fca..33102de 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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;