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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:32:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:08 +0100 |
| commit | e801f864ec7e5b149bd05337800e419f408523bb (patch) | |
| tree | cdab4ec9635926756f58398469621031a2f34ae4 /include/asm-x86/paravirt.h | |
| parent | 4a8c4c4e10d1bc2c3bd80caabb6a76a66849f7e8 (diff) | |
| download | op-kernel-dev-e801f864ec7e5b149bd05337800e419f408523bb.zip op-kernel-dev-e801f864ec7e5b149bd05337800e419f408523bb.tar.gz | |
x86: adds paravirt hook for swapgs
This patch adds paravirt hook for swapgs operation, which is a privileged
operation in x86_64.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/paravirt.h')
| -rw-r--r-- | include/asm-x86/paravirt.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 7d1c126..e8fbf74 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -127,6 +127,8 @@ struct pv_cpu_ops { void (*irq_enable_syscall_ret)(void); void (*iret)(void); + void (*swapgs)(void); + struct pv_lazy_ops lazy_mode; }; @@ -1228,6 +1230,13 @@ static inline unsigned long __raw_local_irq_save(void) call *pv_cpu_ops+PV_CPU_read_cr0; \ pop %edx; pop %ecx #else +#define SWAPGS \ + PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \ + PV_SAVE_REGS; \ + call *pv_cpu_ops+PV_CPU_swapgs; \ + PV_RESTORE_REGS \ + ) + #define GET_CR2_INTO_RCX \ call *pv_mmu_ops+PV_MMU_read_cr2; \ movq %rax, %rcx; \ |
