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Diffstat (limited to 'arch/x86/kernel/cpu/intel.c')
-rw-r--r--arch/x86/kernel/cpu/intel.c24
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