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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:31:10 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:31:10 +0100 |
| commit | 49a697871e2edcbc9cc682466bc4f2316b854d23 (patch) | |
| tree | 220d6b29d46a5f30f077882f0b6d4ae25775f8f2 /arch/x86/kernel/head_64.S | |
| parent | 70fd93c9d9e07dd2ea4465df76a0ddd414fd21ac (diff) | |
| download | linux-49a697871e2edcbc9cc682466bc4f2316b854d23.tar.gz linux-49a697871e2edcbc9cc682466bc4f2316b854d23.tar.bz2 linux-49a697871e2edcbc9cc682466bc4f2316b854d23.zip | |
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.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index b6167fe3330e..c31b1c96a9d3 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) |