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Message-ID: <20140401083606.GA23836@gmail.com>
Date: Tue, 1 Apr 2014 10:36:06 +0200
From: Ingo Molnar <mingo@...nel.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>
Subject: [GIT PULL] x86/cpufeature changes for v3.15
Linus,
Please pull the latest x86-cpufeature-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86-cpufeature-for-linus
# HEAD: da4aaa7d860c63a1bfd3c73cf8309afe2840c5b9 x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT
Two refinements to clflushopt support.
out-of-topic modifications in x86-cpufeature-for-linus:
---------------------------------------------------------
drivers/gpu/drm/gma500/mmu.c # 840d283: x86, cpufeature: Rename X86_FEATU
Thanks,
Ingo
------------------>
H. Peter Anvin (2):
x86, cpufeature: Rename X86_FEATURE_CLFLSH to X86_FEATURE_CLFLUSH
x86, cpufeature: If we disable CLFLUSH, we should disable CLFLUSHOPT
arch/x86/include/asm/cpufeature.h | 4 ++--
arch/x86/kernel/cpu/common.c | 3 ++-
arch/x86/kernel/smpboot.c | 2 +-
arch/x86/kvm/cpuid.c | 2 +-
drivers/gpu/drm/gma500/mmu.c | 2 +-
5 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index bc507d7..63211ef 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -37,7 +37,7 @@
#define X86_FEATURE_PAT (0*32+16) /* Page Attribute Table */
#define X86_FEATURE_PSE36 (0*32+17) /* 36-bit PSEs */
#define X86_FEATURE_PN (0*32+18) /* Processor serial number */
-#define X86_FEATURE_CLFLSH (0*32+19) /* "clflush" CLFLUSH instruction */
+#define X86_FEATURE_CLFLUSH (0*32+19) /* CLFLUSH instruction */
#define X86_FEATURE_DS (0*32+21) /* "dts" Debug Store */
#define X86_FEATURE_ACPI (0*32+22) /* ACPI via MSR */
#define X86_FEATURE_MMX (0*32+23) /* Multimedia Extensions */
@@ -318,7 +318,7 @@ extern const char * const x86_power_flags[32];
#define cpu_has_pmm_enabled boot_cpu_has(X86_FEATURE_PMM_EN)
#define cpu_has_ds boot_cpu_has(X86_FEATURE_DS)
#define cpu_has_pebs boot_cpu_has(X86_FEATURE_PEBS)
-#define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLSH)
+#define cpu_has_clflush boot_cpu_has(X86_FEATURE_CLFLUSH)
#define cpu_has_bts boot_cpu_has(X86_FEATURE_BTS)
#define cpu_has_gbpages boot_cpu_has(X86_FEATURE_GBPAGES)
#define cpu_has_arch_perfmon boot_cpu_has(X86_FEATURE_ARCH_PERFMON)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 8e28bf2..cca53d8 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1025,7 +1025,8 @@ __setup("show_msr=", setup_show_msr);
static __init int setup_noclflush(char *arg)
{
- setup_clear_cpu_cap(X86_FEATURE_CLFLSH);
+ setup_clear_cpu_cap(X86_FEATURE_CLFLUSH);
+ setup_clear_cpu_cap(X86_FEATURE_CLFLUSHOPT);
return 1;
}
__setup("noclflush", setup_noclflush);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index a32da80..ffc78c3 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1379,7 +1379,7 @@ static inline void mwait_play_dead(void)
if (!this_cpu_has(X86_FEATURE_MWAIT))
return;
- if (!this_cpu_has(X86_FEATURE_CLFLSH))
+ if (!this_cpu_has(X86_FEATURE_CLFLUSH))
return;
if (__this_cpu_read(cpu_info.cpuid_level) < CPUID_MWAIT_LEAF)
return;
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index c697625..e5503d8 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -263,7 +263,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
F(TSC) | F(MSR) | F(PAE) | F(MCE) |
F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) |
F(MTRR) | F(PGE) | F(MCA) | F(CMOV) |
- F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) |
+ F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLUSH) |
0 /* Reserved, DS, ACPI */ | F(MMX) |
F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) |
0 /* HTT, TM, Reserved, PBE */;
diff --git a/drivers/gpu/drm/gma500/mmu.c b/drivers/gpu/drm/gma500/mmu.c
index 49bac41..c3e67ba 100644
--- a/drivers/gpu/drm/gma500/mmu.c
+++ b/drivers/gpu/drm/gma500/mmu.c
@@ -520,7 +520,7 @@ struct psb_mmu_driver *psb_mmu_driver_init(uint8_t __iomem * registers,
driver->has_clflush = 0;
- if (boot_cpu_has(X86_FEATURE_CLFLSH)) {
+ if (boot_cpu_has(X86_FEATURE_CLFLUSH)) {
uint32_t tfms, misc, cap0, cap4, clflush_size;
/*
--
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