Register the new kernel ('ring 0') stack pointer with the hypervisor during context switch. Signed-off-by: Ian Pratt <ian.pratt@xxxxxxxxxxxxx> Signed-off-by: Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx> --- include/asm-i386/mach-default/mach_processor.h | 8 ++++++++ include/asm-i386/mach-xen/mach_processor.h | 9 +++++++++ include/asm-i386/processor.h | 3 +++ 3 files changed, 20 insertions(+) --- xen-subarch-2.6.orig/include/asm-i386/processor.h +++ xen-subarch-2.6/include/asm-i386/processor.h @@ -472,6 +472,8 @@ struct thread_struct { .io_bitmap_ptr = NULL, \ } +#include <mach_processor.h> + /* * Note that the .io_bitmap member must be extra-big. This is because * the CPU will access an additional byte beyond the end of the IO @@ -494,6 +496,7 @@ static inline void load_esp0(struct tss_ tss->ss1 = thread->sysenter_cs; wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); } + mach_load_esp0(tss, thread); } #define start_thread(regs, new_eip, new_esp) do { \ --- /dev/null +++ xen-subarch-2.6/include/asm-i386/mach-xen/mach_processor.h @@ -0,0 +1,9 @@ +#ifndef __ASM_MACH_PROCESSOR_H +#define __ASM_MACH_PROCESSOR_H + +static inline void mach_load_esp0(struct tss_struct *tss, struct thread_struct *thread) +{ + HYPERVISOR_stack_switch(tss->ss0, tss->esp0); +} + +#endif /* __ASM_MACH_PROCESSOR_H */ --- /dev/null +++ xen-subarch-2.6/include/asm-i386/mach-default/mach_processor.h @@ -0,0 +1,8 @@ +#ifndef __ASM_MACH_PROCESSOR_H +#define __ASM_MACH_PROCESSOR_H + +static inline void mach_load_esp0(struct tss_struct *tss, struct thread_struct *thread) +{ +} + +#endif /* __ASM_MACH_PROCESSOR_H */ --