diff options
| author | Andi Kleen <ak@suse.de> | 2008-01-30 13:33:21 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:21 +0100 |
| commit | ac72e7888a612dccfbc15b34698aad441bdfda10 (patch) | |
| tree | abd99cb2ad8ddfd7f695bcfbe6eb9b6e1183ed3d /arch | |
| parent | 191679fdfa63342752ff6a094a2522ae939b8d0c (diff) | |
x86: add generic clearcpuid=... option
Add a generic option to clear any cpuid bit. I added it because it was
very easy to add with the new generic cpuid disable bitmap and perhaps
it will be useful in the future.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 11 | ||||
| -rw-r--r-- | arch/x86/kernel/setup_64.c | 11 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 56b7ea8e6c7..56cc341cc58 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -572,6 +572,17 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) printk("\n"); } +static __init int setup_disablecpuid(char *arg) +{ + int bit; + if (get_option(&arg, &bit) && bit < NCAPINTS*32) + setup_clear_cpu_cap(bit); + else + return 0; + return 1; +} +__setup("clearcpuid=", setup_disablecpuid); + cpumask_t cpu_initialized __cpuinitdata = CPU_MASK_NONE; /* This is hacky. :) diff --git a/arch/x86/kernel/setup_64.c b/arch/x86/kernel/setup_64.c index cb9b8a90c09..79635b7bd57 100644 --- a/arch/x86/kernel/setup_64.c +++ b/arch/x86/kernel/setup_64.c @@ -1050,6 +1050,17 @@ void __cpuinit print_cpu_info(struct cpuinfo_x86 *c) printk(KERN_CONT "\n"); } +static __init int setup_disablecpuid(char *arg) +{ + int bit; + if (get_option(&arg, &bit) && bit < NCAPINTS*32) + setup_clear_cpu_cap(bit); + else + return 0; + return 1; +} +__setup("clearcpuid=", setup_disablecpuid); + /* * Get CPU information for use by the procfs. */ |