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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-25 06:19:28 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:15:52 +0200 |
| commit | 2be29982a08009c731307f4a39053b70ac4700da (patch) | |
| tree | f01fcf847f36b9da5cd87cefa7ee6c13d193077d /include/asm-x86/irqflags.h | |
| parent | x86/paravirt, 64-bit: don't restore user rsp within sysret (diff) | |
| download | linux-2be29982a08009c731307f4a39053b70ac4700da.tar.xz linux-2be29982a08009c731307f4a39053b70ac4700da.zip | |
x86/paravirt: add sysret/sysexit pvops for returning to 32-bit compatibility userspace
In a 64-bit system, we need separate sysret/sysexit operations to
return to a 32-bit userspace.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citirx.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/irqflags.h')
| -rw-r--r-- | include/asm-x86/irqflags.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h index 544836c96b61..ea9bd2635d59 100644 --- a/include/asm-x86/irqflags.h +++ b/include/asm-x86/irqflags.h @@ -112,9 +112,17 @@ static inline unsigned long __raw_local_irq_save(void) #ifdef CONFIG_X86_64 #define INTERRUPT_RETURN iretq -#define USERGS_SYSRET \ - swapgs; \ - sysretq; +#define USERGS_SYSRET64 \ + swapgs; \ + sysretq; +#define USERGS_SYSRET32 \ + swapgs; \ + sysretl +#define ENABLE_INTERRUPTS_SYSEXIT32 \ + swapgs; \ + sti; \ + sysexit + #else #define INTERRUPT_RETURN iret #define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit |