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86 lines
2.6 KiB
86 lines
2.6 KiB
#include <asm/paravirt.h> |
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#include <asm/asm-offsets.h> |
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#include <linux/stringify.h> |
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DEF_NATIVE(pv_irq_ops, irq_disable, "cli"); |
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DEF_NATIVE(pv_irq_ops, irq_enable, "sti"); |
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DEF_NATIVE(pv_irq_ops, restore_fl, "pushq %rdi; popfq"); |
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DEF_NATIVE(pv_irq_ops, save_fl, "pushfq; popq %rax"); |
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DEF_NATIVE(pv_mmu_ops, read_cr2, "movq %cr2, %rax"); |
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DEF_NATIVE(pv_mmu_ops, read_cr3, "movq %cr3, %rax"); |
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DEF_NATIVE(pv_mmu_ops, write_cr3, "movq %rdi, %cr3"); |
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DEF_NATIVE(pv_mmu_ops, flush_tlb_single, "invlpg (%rdi)"); |
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DEF_NATIVE(pv_cpu_ops, clts, "clts"); |
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DEF_NATIVE(pv_cpu_ops, wbinvd, "wbinvd"); |
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DEF_NATIVE(pv_cpu_ops, irq_enable_sysexit, "swapgs; sti; sysexit"); |
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DEF_NATIVE(pv_cpu_ops, usergs_sysret64, "swapgs; sysretq"); |
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DEF_NATIVE(pv_cpu_ops, usergs_sysret32, "swapgs; sysretl"); |
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DEF_NATIVE(pv_cpu_ops, swapgs, "swapgs"); |
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DEF_NATIVE(, mov32, "mov %edi, %eax"); |
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DEF_NATIVE(, mov64, "mov %rdi, %rax"); |
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#if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS) |
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DEF_NATIVE(pv_lock_ops, queued_spin_unlock, "movb $0, (%rdi)"); |
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#endif |
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unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len) |
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{ |
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return paravirt_patch_insns(insnbuf, len, |
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start__mov32, end__mov32); |
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} |
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unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len) |
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{ |
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return paravirt_patch_insns(insnbuf, len, |
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start__mov64, end__mov64); |
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} |
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extern bool pv_is_native_spin_unlock(void); |
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unsigned native_patch(u8 type, u16 clobbers, void *ibuf, |
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unsigned long addr, unsigned len) |
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{ |
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const unsigned char *start, *end; |
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unsigned ret; |
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#define PATCH_SITE(ops, x) \ |
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case PARAVIRT_PATCH(ops.x): \ |
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start = start_##ops##_##x; \ |
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end = end_##ops##_##x; \ |
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goto patch_site |
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switch(type) { |
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PATCH_SITE(pv_irq_ops, restore_fl); |
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PATCH_SITE(pv_irq_ops, save_fl); |
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PATCH_SITE(pv_irq_ops, irq_enable); |
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PATCH_SITE(pv_irq_ops, irq_disable); |
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PATCH_SITE(pv_cpu_ops, usergs_sysret32); |
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PATCH_SITE(pv_cpu_ops, usergs_sysret64); |
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PATCH_SITE(pv_cpu_ops, swapgs); |
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PATCH_SITE(pv_mmu_ops, read_cr2); |
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PATCH_SITE(pv_mmu_ops, read_cr3); |
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PATCH_SITE(pv_mmu_ops, write_cr3); |
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PATCH_SITE(pv_cpu_ops, clts); |
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PATCH_SITE(pv_mmu_ops, flush_tlb_single); |
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PATCH_SITE(pv_cpu_ops, wbinvd); |
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#if defined(CONFIG_PARAVIRT_SPINLOCKS) && defined(CONFIG_QUEUED_SPINLOCKS) |
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case PARAVIRT_PATCH(pv_lock_ops.queued_spin_unlock): |
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if (pv_is_native_spin_unlock()) { |
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start = start_pv_lock_ops_queued_spin_unlock; |
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end = end_pv_lock_ops_queued_spin_unlock; |
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goto patch_site; |
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} |
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#endif |
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default: |
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ret = paravirt_patch_default(type, clobbers, ibuf, addr, len); |
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break; |
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patch_site: |
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ret = paravirt_patch_insns(ibuf, len, start, end); |
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break; |
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} |
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#undef PATCH_SITE |
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return ret; |
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}
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