diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 05:14:48 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-28 05:14:48 -0700 |
| commit | 8237eb946a1a23c600fb289cf8dd3b399b10604e (patch) | |
| tree | e3985782029601ede4035cfec7ee59e1a54324fd /arch/x86/kernel/cpu/intel.c | |
| parent | cc21fe518a971bb2b0ab8370ec46ea21e84c57ab (diff) | |
| parent | bcb80e53877c2045d9e52f4a71372c3fe6501f6f (diff) | |
Merge branch 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-microcode-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, microcode, AMD: Add microcode revision to /proc/cpuinfo
x86, microcode: Correct microcode revision format
coretemp: Get microcode revision from cpu_data
x86, intel: Use c->microcode for Atom errata check
x86, intel: Output microcode revision in /proc/cpuinfo
x86, microcode: Don't request microcode from userspace unnecessarily
Fix up trivial conflicts in arch/x86/kernel/cpu/amd.c (conflict between
moving AMD BSP code to cpu_dev helper function and adding AMD microcode
revision to /proc/cpuinfo code)
Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel.c | 24 |
1 files changed, 13 insertions, 11 deletions
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index ed6086eedf1..523131213f0 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -47,6 +47,15 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) (c->x86 == 0x6 && c->x86_model >= 0x0e)) set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); + if (c->x86 >= 6 && !cpu_has(c, X86_FEATURE_IA64)) { + unsigned lower_word; + + wrmsr(MSR_IA32_UCODE_REV, 0, 0); + /* Required by the SDM */ + sync_core(); + rdmsr(MSR_IA32_UCODE_REV, lower_word, c->microcode); + } + /* * Atom erratum AAE44/AAF40/AAG38/AAH41: * @@ -55,17 +64,10 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c) * need the microcode to have already been loaded... so if it is * not, recommend a BIOS update and disable large pages. */ - if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2) { - u32 ucode, junk; - - wrmsr(MSR_IA32_UCODE_REV, 0, 0); - sync_core(); - rdmsr(MSR_IA32_UCODE_REV, junk, ucode); - - if (ucode < 0x20e) { - printk(KERN_WARNING "Atom PSE erratum detected, BIOS microcode update recommended\n"); - clear_cpu_cap(c, X86_FEATURE_PSE); - } + if (c->x86 == 6 && c->x86_model == 0x1c && c->x86_mask <= 2 && + c->microcode < 0x20e) { + printk(KERN_WARNING "Atom PSE erratum detected, BIOS microcode update recommended\n"); + clear_cpu_cap(c, X86_FEATURE_PSE); } #ifdef CONFIG_X86_64 |