76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#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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#ifdef CONFIG_PARAVIRT_XXL
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DEF_NATIVE(irq, irq_disable, "cli");
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DEF_NATIVE(irq, irq_enable, "sti");
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DEF_NATIVE(irq, restore_fl, "pushq %rdi; popfq");
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DEF_NATIVE(irq, save_fl, "pushfq; popq %rax");
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DEF_NATIVE(mmu, read_cr2, "movq %cr2, %rax");
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DEF_NATIVE(mmu, read_cr3, "movq %cr3, %rax");
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DEF_NATIVE(mmu, write_cr3, "movq %rdi, %cr3");
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DEF_NATIVE(cpu, wbinvd, "wbinvd");
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DEF_NATIVE(cpu, usergs_sysret64, "swapgs; sysretq");
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DEF_NATIVE(cpu, swapgs, "swapgs");
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DEF_NATIVE(, mov64, "mov %rdi, %rax");
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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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#endif
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#if defined(CONFIG_PARAVIRT_SPINLOCKS)
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DEF_NATIVE(lock, queued_spin_unlock, "movb $0, (%rdi)");
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DEF_NATIVE(lock, vcpu_is_preempted, "xor %eax, %eax");
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#endif
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extern bool pv_is_native_spin_unlock(void);
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extern bool pv_is_native_vcpu_is_preempted(void);
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unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
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{
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#define PATCH_SITE(ops, x) \
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case PARAVIRT_PATCH(ops.x): \
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return paravirt_patch_insns(ibuf, len, start_##ops##_##x, end_##ops##_##x)
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switch (type) {
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#ifdef CONFIG_PARAVIRT_XXL
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PATCH_SITE(irq, restore_fl);
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PATCH_SITE(irq, save_fl);
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PATCH_SITE(irq, irq_enable);
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PATCH_SITE(irq, irq_disable);
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PATCH_SITE(cpu, usergs_sysret64);
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PATCH_SITE(cpu, swapgs);
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PATCH_SITE(cpu, wbinvd);
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PATCH_SITE(mmu, read_cr2);
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PATCH_SITE(mmu, read_cr3);
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PATCH_SITE(mmu, write_cr3);
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#endif
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#if defined(CONFIG_PARAVIRT_SPINLOCKS)
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case PARAVIRT_PATCH(lock.queued_spin_unlock):
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if (pv_is_native_spin_unlock())
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return paravirt_patch_insns(ibuf, len,
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start_lock_queued_spin_unlock,
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end_lock_queued_spin_unlock);
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break;
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case PARAVIRT_PATCH(lock.vcpu_is_preempted):
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if (pv_is_native_vcpu_is_preempted())
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return paravirt_patch_insns(ibuf, len,
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start_lock_vcpu_is_preempted,
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end_lock_vcpu_is_preempted);
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break;
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#endif
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default:
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break;
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}
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#undef PATCH_SITE
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return paravirt_patch_default(type, ibuf, addr, len);
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}
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