diff options
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 41 |
1 files changed, 15 insertions, 26 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 30b5055be35..e76b49e7a91 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -25,35 +25,24 @@ extern void vide(void); __asm__(".align 4\nvide: ret"); #ifdef CONFIG_X86_LOCAL_APIC -#define CPUID_PROCESSOR_SIGNATURE 1 -#define CPUID_XFAM 0x0ff00000 -#define CPUID_XFAM_K8 0x00000000 -#define CPUID_XFAM_10H 0x00100000 -#define CPUID_XFAM_11H 0x00200000 -#define CPUID_XMOD 0x000f0000 -#define CPUID_XMOD_REV_F 0x00040000 /* AMD systems with C1E don't have a working lAPIC timer. Check for that. */ -static __cpuinit int amd_apic_timer_broken(void) +static __cpuinit int amd_apic_timer_broken(struct cpuinfo_x86 *c) { u32 lo, hi; - u32 eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); - switch (eax & CPUID_XFAM) { - case CPUID_XFAM_K8: - if ((eax & CPUID_XMOD) < CPUID_XMOD_REV_F) - break; - case CPUID_XFAM_10H: - case CPUID_XFAM_11H: - rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi); - if (lo & K8_INTP_C1E_ACTIVE_MASK) { - if (smp_processor_id() != boot_cpu_physical_apicid) - printk(KERN_INFO "AMD C1E detected late. " - " Force timer broadcast.\n"); - return 1; - } - break; - default: - /* err on the side of caution */ + + if (c->x86 < 0x0F) + return 0; + + /* Family 0x0f models < rev F do not have this MSR */ + if (c->x86 == 0x0f && c->x86_model < 0x40) + return 0; + + rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi); + if (lo & K8_INTP_C1E_ACTIVE_MASK) { + if (smp_processor_id() != boot_cpu_physical_apicid) + printk(KERN_INFO "AMD C1E detected late. " + "Force timer broadcast.\n"); return 1; } return 0; @@ -297,7 +286,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) } #ifdef CONFIG_X86_LOCAL_APIC - if (amd_apic_timer_broken()) + if (amd_apic_timer_broken(c)) local_apic_timer_disabled = 1; #endif |