| Date | Tue, 18 Jul 2006 00:00:22 -0700 | From | Chris Wright <> | Subject | [RFC PATCH 22/33] subarch stack pointer update |
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Register the new kernel ('ring 0') stack pointer with the hypervisor during context switch.
Signed-off-by: Ian Pratt <ian.pratt@xensource.com> Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk> Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- include/asm-i386/mach-default/mach_processor.h | 7 +++++++ include/asm-i386/mach-xen/mach_processor.h | 8 ++++++++ include/asm-i386/processor.h | 1 + 3 files changed, 16 insertions(+)
diff -r 60dd30eed8f3 include/asm-i386/mach-default/mach_processor.h --- a/include/asm-i386/mach-default/mach_processor.h Fri Mar 31 15:36:12 2006 +0100 +++ b/include/asm-i386/mach-default/mach_processor.h Fri Mar 31 15:38:00 2006 +0100 @@ -4,4 +4,11 @@ #define CPUID cpuid #define CPUID_STR "cpuid" +#ifndef __ASSEMBLY__ +static inline void mach_update_kernel_stack(unsigned long esp0, + unsigned short ss0) +{ +} +#endif + #endif /* __ASM_MACH_PROCESSOR_H */ diff -r 60dd30eed8f3 include/asm-i386/mach-xen/mach_processor.h --- a/include/asm-i386/mach-xen/mach_processor.h Fri Mar 31 15:36:12 2006 +0100 +++ b/include/asm-i386/mach-xen/mach_processor.h Fri Mar 31 15:38:00 2006 +0100 @@ -6,4 +6,12 @@ #define CPUID XEN_CPUID #define CPUID_STR XEN_CPUID +#ifndef __ASSEMBLY__ +static inline void mach_update_kernel_stack(unsigned long esp0, + unsigned short ss0) +{ + HYPERVISOR_stack_switch(ss0, esp0); +} +#endif + #endif /* __ASM_MACH_PROCESSOR_H */ diff -r 60dd30eed8f3 include/asm-i386/processor.h --- a/include/asm-i386/processor.h Fri Mar 31 15:36:12 2006 +0100 +++ b/include/asm-i386/processor.h Fri Mar 31 15:38:00 2006 +0100 @@ -500,6 +500,7 @@ static inline void load_esp0(struct tss_ tss->ss1 = thread->sysenter_cs; wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); } + mach_update_kernel_stack(tss->esp0, tss->ss0); } #define start_thread(regs, new_eip, new_esp) do { \ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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