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- #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_sysexit, "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");
- #if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS)
- DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%eax)");
- #endif
- unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len)
- {
- /* arg in %eax, return in %eax */
- return 0;
- }
- unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
- {
- /* arg in %edx:%eax, return in %edx:%eax */
- return 0;
- }
- extern bool pv_is_native_spin_unlock(void);
- 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_sysexit);
- 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);
- #if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS)
- case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock):
- if (pv_is_native_spin_unlock()) {
- start = start_pv_lock_ops_queued_spin_unlock;
- end = end_pv_lock_ops_queued_spin_unlock;
- goto patch_site;
- }
- #endif
- default:
- ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
- break;
- patch_site:
- ret = paravirt_patch_insns(ibuf, len, start, end);
- break;
- }
- #undef PATCH_SITE
- return ret;
- }
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