summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/machine_kexec_64.c
diff options
context:
space:
mode:
authorK.Prasad <prasad@linux.vnet.ibm.com>2009-06-01 23:46:03 +0530
committerFrederic Weisbecker <fweisbec@gmail.com>2009-06-02 22:47:00 +0200
commit17f557e5b5d43a2af66c969f6560ac7105020672 (patch)
treea3aab9ccd15dca1a44490a05defb45423a9945d5 /arch/x86/kernel/machine_kexec_64.c
parent72f674d203cd230426437cdcf7dd6f681dad8b0d (diff)
downloadlinux-17f557e5b5d43a2af66c969f6560ac7105020672.tar.bz2
hw-breakpoints: cleanup HW Breakpoint registers before kexec
This patch disables Hardware breakpoints before doing a 'kexec' on the machine so that the cpu doesn't keep debug registers values which would be out of sync for the new image. Original-patch-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com> Reviewed-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'arch/x86/kernel/machine_kexec_64.c')
-rw-r--r--arch/x86/kernel/machine_kexec_64.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
index 84c3bf209e98..4a8bb82248ae 100644
--- a/arch/x86/kernel/machine_kexec_64.c
+++ b/arch/x86/kernel/machine_kexec_64.c
@@ -18,6 +18,7 @@
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/mmu_context.h>
+#include <asm/debugreg.h>
static int init_one_level2_page(struct kimage *image, pgd_t *pgd,
unsigned long addr)
@@ -282,6 +283,7 @@ void machine_kexec(struct kimage *image)
/* Interrupts aren't acceptable while we reboot */
local_irq_disable();
+ hw_breakpoint_disable();
if (image->preserve_context) {
#ifdef CONFIG_X86_IO_APIC