diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 35 | ||||
| -rw-r--r-- | arch/x86/vdso/vdso32-setup.c | 8 |
2 files changed, 41 insertions, 2 deletions
diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 540686be35d0..b80300710c08 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -885,6 +885,32 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c) srat_detect_node(); } +static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c) +{ + if (c->x86 == 0x6 && c->x86_model >= 0xf) + set_bit(X86_FEATURE_CONSTANT_TSC, &c->x86_capability); +} + +static void __cpuinit init_centaur(struct cpuinfo_x86 *c) +{ + /* Cache sizes */ + unsigned n; + + n = c->extended_cpuid_level; + if (n >= 0x80000008) { + unsigned eax = cpuid_eax(0x80000008); + c->x86_virt_bits = (eax >> 8) & 0xff; + c->x86_phys_bits = eax & 0xff; + } + + if (c->x86 == 0x6 && c->x86_model >= 0xf) { + c->x86_cache_alignment = c->x86_clflush_size * 2; + set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); + set_cpu_cap(c, X86_FEATURE_REP_GOOD); + } + set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); +} + static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) { char *v = c->x86_vendor_id; @@ -893,6 +919,8 @@ static void __cpuinit get_cpu_vendor(struct cpuinfo_x86 *c) c->x86_vendor = X86_VENDOR_AMD; else if (!strcmp(v, "GenuineIntel")) c->x86_vendor = X86_VENDOR_INTEL; + else if (!strcmp(v, "CentaurHauls")) + c->x86_vendor = X86_VENDOR_CENTAUR; else c->x86_vendor = X86_VENDOR_UNKNOWN; } @@ -989,6 +1017,9 @@ static void __cpuinit early_identify_cpu(struct cpuinfo_x86 *c) if (c->x86 == 0xF || (c->x86 == 6 && c->x86_model >= 15)) set_cpu_cap(c, X86_FEATURE_PAT); break; + case X86_VENDOR_CENTAUR: + early_init_centaur(c); + break; } } @@ -1025,6 +1056,10 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) init_intel(c); break; + case X86_VENDOR_CENTAUR: + init_centaur(c); + break; + case X86_VENDOR_UNKNOWN: default: display_cacheinfo(c); diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c index f7e78d84fc01..e2af8eee80e3 100644 --- a/arch/x86/vdso/vdso32-setup.c +++ b/arch/x86/vdso/vdso32-setup.c @@ -210,8 +210,12 @@ static int use_sysenter __read_mostly = -1; /* May not be __init: called during resume */ void syscall32_cpu_init(void) { - if (use_sysenter < 0) - use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL); + if (use_sysenter < 0) { + if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) + use_sysenter = 1; + if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR) + use_sysenter = 1; + } /* Load these always in case some future AMD CPU supports SYSENTER from compat mode too. */ |