From 2f485ef568372af4680c4e2f8490efb9f2523b05 Mon Sep 17 00:00:00 2001 From: Glauber de Oliveira Costa Date: Wed, 30 Jan 2008 13:32:10 +0100 Subject: x86: move patching code to arch-specific file. The core patching code for paravirt is sufficiently different among i386 and x86_64, and we move them to specific files. Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/paravirt_patch_32.c | 49 +++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 arch/x86/kernel/paravirt_patch_32.c (limited to 'arch/x86/kernel/paravirt_patch_32.c') diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c new file mode 100644 index 00000000000..82fc5fcab4f --- /dev/null +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -0,0 +1,49 @@ +#include + +DEF_NATIVE(pv_irq_ops, irq_disable, "cli"); +DEF_NATIVE(pv_irq_ops, irq_enable, "sti"); +DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf"); +DEF_NATIVE(pv_irq_ops, save_fl, "pushf; pop %eax"); +DEF_NATIVE(pv_cpu_ops, iret, "iret"); +DEF_NATIVE(pv_cpu_ops, irq_enable_syscall_ret, "sti; sysexit"); +DEF_NATIVE(pv_mmu_ops, read_cr2, "mov %cr2, %eax"); +DEF_NATIVE(pv_mmu_ops, write_cr3, "mov %eax, %cr3"); +DEF_NATIVE(pv_mmu_ops, read_cr3, "mov %cr3, %eax"); +DEF_NATIVE(pv_cpu_ops, clts, "clts"); +DEF_NATIVE(pv_cpu_ops, read_tsc, "rdtsc"); + +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, irq_disable); + PATCH_SITE(pv_irq_ops, irq_enable); + PATCH_SITE(pv_irq_ops, restore_fl); + PATCH_SITE(pv_irq_ops, save_fl); + PATCH_SITE(pv_cpu_ops, iret); + PATCH_SITE(pv_cpu_ops, irq_enable_syscall_ret); + 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_cpu_ops, read_tsc); + + 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; +} -- cgit v1.2.3