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authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-30 12:32:08 (GMT)
committerIngo Molnar <mingo@elte.hu>2008-01-30 12:32:08 (GMT)
commite801f864ec7e5b149bd05337800e419f408523bb (patch)
treecdab4ec9635926756f58398469621031a2f34ae4 /include/asm-x86/paravirt.h
parent4a8c4c4e10d1bc2c3bd80caabb6a76a66849f7e8 (diff)
downloadlinux-fsl-qoriq-e801f864ec7e5b149bd05337800e419f408523bb.tar.xz
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.h9
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; \