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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-30 13:31:10 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:31:10 +0100
commit49a697871e2edcbc9cc682466bc4f2316b854d23 (patch)
tree220d6b29d46a5f30f077882f0b6d4ae25775f8f2 /arch/x86/kernel/head_64.S
parent70fd93c9d9e07dd2ea4465df76a0ddd414fd21ac (diff)
x86: turn priviled operation into a macro in head_64.S
under paravirt, read cr2 cannot be issued directly anymore. So wrap it in a macro, defined to the operation itself in case paravirt is off, but to something else if we have paravirt in the game Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/head_64.S')
-rw-r--r--arch/x86/kernel/head_64.S9
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index b6167fe3330..c31b1c96a9d 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -19,6 +19,13 @@
#include <asm/msr.h>
#include <asm/cache.h>
+#ifdef CONFIG_PARAVIRT
+#include <asm/asm-offsets.h>
+#include <asm/paravirt.h>
+#else
+#define GET_CR2_INTO_RCX movq %cr2, %rcx
+#endif
+
/* we are not able to switch in one step to the final KERNEL ADRESS SPACE
* because we need identity-mapped pages.
*
@@ -267,7 +274,7 @@ ENTRY(early_idt_handler)
xorl %eax,%eax
movq 8(%rsp),%rsi # get rip
movq (%rsp),%rdx
- movq %cr2,%rcx
+ GET_CR2_INTO_RCX
leaq early_idt_msg(%rip),%rdi
call early_printk
cmpl $2,early_recursion_flag(%rip)