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| author | Glauber de Oliveira Costa <gcosta@redhat.com> | 2008-01-30 13:32:10 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:32:10 +0100 |
| commit | 53fd13cff04ce27ff3e8d3eb7e5ad4f56b580f2f (patch) | |
| tree | 3ccca4b41a17c4c34c41455f07ef0f422ba389d2 /arch/x86/kernel/paravirt_patch_64.c | |
| parent | x86: move patching code to arch-specific file. (diff) | |
| download | linux-53fd13cff04ce27ff3e8d3eb7e5ad4f56b580f2f.tar.xz linux-53fd13cff04ce27ff3e8d3eb7e5ad4f56b580f2f.zip | |
x86: patching functions on 64-bit
Like i386, x86_64 also need to include its own patching function.
(Well, if you're not in a hurry, and don't care about speed, you don't
really _need_ ;-))
So here they are. Not much different in essence from i386
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 'arch/x86/kernel/paravirt_patch_64.c')
| -rw-r--r-- | arch/x86/kernel/paravirt_patch_64.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c new file mode 100644 index 000000000000..cbfc4f3069e3 --- /dev/null +++ b/arch/x86/kernel/paravirt_patch_64.c @@ -0,0 +1,56 @@ +#include <asm/paravirt.h> +#include <asm/asm-offsets.h> + +DEF_NATIVE(pv_irq_ops, irq_disable, "cli"); +DEF_NATIVE(pv_irq_ops, irq_enable, "sti"); +DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq"); +DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax"); +DEF_NATIVE(pv_cpu_ops, iret, "iretq"); +DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax"); +DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax"); +DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3"); +DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)"); +DEF_NATIVE(pv_cpu_ops, clts, "clts"); +DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd"); + +/* the three commands give us more control to how to return from a syscall */ +DEF_NATIVE(pv_cpu_ops, irq_enable_syscall_ret, "movq %gs:" __stringify(pda_oldrsp) ", %rsp; swapgs; sysretq;"); +DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs"); + +unsigned native_patch(u8 type, u16 clobbers, void *ibuf, + unsigned long addr, unsigned len) +{ + const unsigned char *start, *end; + unsigned ret; + +#define PATCH_SITE(ops, x) \ + case PARAVIRT_PATCH(ops.x): \ + start = start_##ops##_##x; \ + end = end_##ops##_##x; \ + goto patch_site + switch(type) { + PATCH_SITE(pv_irq_ops, restore_fl); + PATCH_SITE(pv_irq_ops, save_fl); + PATCH_SITE(pv_irq_ops, irq_enable); + PATCH_SITE(pv_irq_ops, irq_disable); + PATCH_SITE(pv_cpu_ops, iret); + PATCH_SITE(pv_cpu_ops, irq_enable_syscall_ret); + PATCH_SITE(pv_cpu_ops, swapgs); + PATCH_SITE(pv_mmu_ops, read_cr2); + PATCH_SITE(pv_mmu_ops, read_cr3); + PATCH_SITE(pv_mmu_ops, write_cr3); + PATCH_SITE(pv_cpu_ops, clts); + PATCH_SITE(pv_mmu_ops, flush_tlb_single); + PATCH_SITE(pv_cpu_ops, wbinvd); + + patch_site: + ret = paravirt_patch_insns(ibuf, len, start, end); + break; + + default: + ret = paravirt_patch_default(type, clobbers, ibuf, addr, len); + break; + } +#undef PATCH_SITE + return ret; +} |