forked from luck/tmp_suning_uos_patched
8a650ce297
We use a __stringify construction at paravirt_patch_64.c. It's better practice to include the stringify header directly 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>
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
#include <asm/paravirt.h>
|
|
#include <asm/asm-offsets.h>
|
|
#include <linux/stringify.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;
|
|
}
|