diff options
| -rw-r--r-- | arch/x86/include/asm/processor.h | 5 | ||||
| -rw-r--r-- | arch/x86/kernel/process.c | 1 | ||||
| -rw-r--r-- | arch/x86/lguest/boot.c | 1 | ||||
| -rw-r--r-- | arch/x86/xen/enlighten.c | 1 |
4 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 7be2c9a6caba..71c3a826a690 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -564,6 +564,11 @@ static inline void native_swapgs(void) #endif } +static inline unsigned long this_cpu_sp0(void) +{ + return this_cpu_read_stable(init_tss.x86_tss.sp0); +} + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c index 046e2d620bbe..ff5c9088b1c5 100644 --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -38,6 +38,7 @@ * on exact cacheline boundaries, to eliminate cacheline ping-pong. */ __visible DEFINE_PER_CPU_SHARED_ALIGNED(struct tss_struct, init_tss) = INIT_TSS; +EXPORT_PER_CPU_SYMBOL_GPL(init_tss); #ifdef CONFIG_X86_64 static DEFINE_PER_CPU(unsigned char, is_idle); diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index ac4453d8520e..8561585ee2c6 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -1076,6 +1076,7 @@ static void lguest_load_sp0(struct tss_struct *tss, { lazy_hcall3(LHCALL_SET_STACK, __KERNEL_DS | 0x1, thread->sp0, THREAD_SIZE / PAGE_SIZE); + tss->x86_tss.sp0 = thread->sp0; } /* Let's just say, I wouldn't do debugging under a Guest. */ diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 5240f563076d..81665c9f2132 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -912,6 +912,7 @@ static void xen_load_sp0(struct tss_struct *tss, mcs = xen_mc_entry(0); MULTI_stack_switch(mcs.mc, __KERNEL_DS, thread->sp0); xen_mc_issue(PARAVIRT_LAZY_CPU); + tss->x86_tss.sp0 = thread->sp0; } static void xen_set_iopl_mask(unsigned mask) |