diff options
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 6 | ||||
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 4bd326d..f0f29dd 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -57,6 +57,8 @@ DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = { } }; EXPORT_PER_CPU_SYMBOL_GPL(gdt_page); +__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata; + static int cachesize_override __cpuinitdata = -1; static int disable_x86_fxsr __cpuinitdata; static int disable_x86_serial_nr __cpuinitdata = 1; @@ -497,6 +499,10 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; } + /* Clear all flags overriden by options */ + for (i = 0; i < NCAPINTS; i++) + c->x86_capability[i] ^= cleared_cpu_caps[i]; + /* Init Machine Check Exception if available. */ mcheck_init(c); diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index 7edb43f..df15952 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -80,6 +80,8 @@ struct cpuinfo_x86 boot_cpu_data __read_mostly; EXPORT_SYMBOL(boot_cpu_data); +__u32 cleared_cpu_caps[NCAPINTS] __cpuinitdata; + unsigned long mmu_cr4_features; /* Boot loader ID as an integer, for the benefit of proc_dointvec */ @@ -1013,6 +1015,10 @@ void __cpuinit identify_cpu(struct cpuinfo_x86 *c) boot_cpu_data.x86_capability[i] &= c->x86_capability[i]; } + /* Clear all flags overriden by options */ + for (i = 0; i < NCAPINTS; i++) + c->x86_capability[i] ^= cleared_cpu_caps[i]; + #ifdef CONFIG_X86_MCE mcheck_init(c); #endif |