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authorJeremy Fitzhardinge <jeremy@goop.org>2007-05-02 19:27:16 +0200
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 19:27:16 +0200
commit959b4fdfe7e27bcf101e2381e500e4076f2bb9ce (patch)
tree65406ba086d3547ac1570639a8e7e42345191ed4 /arch
parent752783c050f1729452a89b2baea45b0124ac91c7 (diff)
[PATCH] i386: PARAVIRT: Allow boot-time disable of paravirt_ops patching
Add "noreplace-paravirt" to disable paravirt_ops patching. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/alternative.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/i386/kernel/alternative.c b/arch/i386/kernel/alternative.c
index c5d037c6095..080a59d56ea 100644
--- a/arch/i386/kernel/alternative.c
+++ b/arch/i386/kernel/alternative.c
@@ -30,6 +30,16 @@ static int __init setup_noreplace_smp(char *str)
}
__setup("noreplace-smp", setup_noreplace_smp);
+#ifdef CONFIG_PARAVIRT
+static int noreplace_paravirt = 0;
+
+static int __init setup_noreplace_paravirt(char *str)
+{
+ noreplace_paravirt = 1;
+ return 1;
+}
+__setup("noreplace-paravirt", setup_noreplace_paravirt);
+#endif
#define DPRINTK(fmt, args...) if (debug_alternative) \
printk(KERN_DEBUG fmt, args)
@@ -330,6 +340,9 @@ void apply_paravirt(struct paravirt_patch_site *start,
{
struct paravirt_patch_site *p;
+ if (noreplace_paravirt)
+ return;
+
for (p = start; p < end; p++) {
unsigned int used;