[PATCH v9 3/5] x86/cpuid: Make clearcpuid an early param

Andi Kleen
2017-10-07T00:03:40Z

From: Andi Kleen <ak@linux.intel.com>

Make clearcpuid= an early param, to make sure it is parsed
before the XSAVE initialization. This allows to modify
XSAVE state by clearing specific CPUID bits.

Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index fd47692e5ce9..ff51c61d2df0 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1310,7 +1310,7 @@ static __init int setup_disablecpuid(char *arg)

return 1;
}
-__setup("clearcpuid=", setup_disablecpuid);
+early_param("clearcpuid", setup_disablecpuid);

#ifdef CONFIG_X86_64
DEFINE_PER_CPU_FIRST(union irq_stack_union,
--
2.13.6