diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/x86/kernel/Makefile_32 | 2 | ||||
-rw-r--r-- | arch/x86/kernel/paravirt.c | 50 | ||||
-rw-r--r-- | arch/x86/kernel/paravirt_patch_32.c | 49 |
3 files changed, 50 insertions, 51 deletions
diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32 index cfb71a5..86c6327 100644 --- a/arch/x86/kernel/Makefile_32 +++ b/arch/x86/kernel/Makefile_32 @@ -48,7 +48,7 @@ obj-$(CONFIG_K8_NB) += k8.o obj-$(CONFIG_MGEODE_LX) += geode_32.o mfgpt_32.o obj-$(CONFIG_VMI) += vmi_32.o vmiclock_32.o -obj-$(CONFIG_PARAVIRT) += paravirt.o +obj-$(CONFIG_PARAVIRT) += paravirt.o paravirt_patch_32.o obj-y += pcspeaker.o obj-$(CONFIG_SCx200) += scx200_32.o diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index e7c17cc..864be04 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -58,59 +58,9 @@ char *memory_setup(void) extern const char start_##ops##_##name[], end_##ops##_##name[]; \ asm("start_" #ops "_" #name ": " code "; end_" #ops "_" #name ":") -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"); - /* Undefined instruction for dealing with missing ops pointers. */ static const unsigned char ud2a[] = { 0x0f, 0x0b }; -static unsigned native_patch(u8 type, u16 clobbers, void *ibuf, - unsigned long addr, unsigned len) -{ - const unsigned char *start, *end; - unsigned ret; - - switch(type) { -#define SITE(ops, x) \ - case PARAVIRT_PATCH(ops.x): \ - start = start_##ops##_##x; \ - end = end_##ops##_##x; \ - goto patch_site - - SITE(pv_irq_ops, irq_disable); - SITE(pv_irq_ops, irq_enable); - SITE(pv_irq_ops, restore_fl); - SITE(pv_irq_ops, save_fl); - SITE(pv_cpu_ops, iret); - SITE(pv_cpu_ops, irq_enable_syscall_ret); - SITE(pv_mmu_ops, read_cr2); - SITE(pv_mmu_ops, read_cr3); - SITE(pv_mmu_ops, write_cr3); - SITE(pv_cpu_ops, clts); - SITE(pv_cpu_ops, read_tsc); -#undef SITE - - patch_site: - ret = paravirt_patch_insns(ibuf, len, start, end); - break; - - default: - ret = paravirt_patch_default(type, clobbers, ibuf, addr, len); - break; - } - - return ret; -} - unsigned paravirt_patch_nop(void) { return 0; diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c new file mode 100644 index 0000000..82fc5fc --- /dev/null +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -0,0 +1,49 @@ +#include <asm/paravirt.h> + +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; +} |