lkml.org 
[lkml]   [2017]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
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.

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 60b7aa6330ed..600e0cf714b9 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1285,7 +1285,7 @@ static __init int setup_disablecpuid(char *arg)

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

#ifdef CONFIG_X86_64
struct desc_ptr idt_descr __ro_after_init = {
--
2.9.4
\
 
 \ /
  Last update: 2017-06-22 20:00    [W:0.031 / U:0.260 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site