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KVM: VMX: Unify register save/restore across 32 and 64 bit hosts
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity
parent
77ab6db0a1
commit
c801949ddf
@ -2955,6 +2955,14 @@ static void fixup_rmode_irq(struct vcpu_vmx *vmx)
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| vmx->rmode.irq.vector;
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}
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#ifdef CONFIG_X86_64
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#define R "r"
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#define Q "q"
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#else
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#define R "e"
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#define Q "l"
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#endif
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static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct vcpu_vmx *vmx = to_vmx(vcpu);
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@ -2972,26 +2980,21 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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asm(
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/* Store host registers */
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#ifdef CONFIG_X86_64
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"push %%rdx; push %%rbp;"
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"push %%rcx \n\t"
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#else
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"push %%edx; push %%ebp;"
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"push %%ecx \n\t"
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#endif
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"push %%"R"dx; push %%"R"bp;"
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"push %%"R"cx \n\t"
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__ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
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/* Check if vmlaunch of vmresume is needed */
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"cmpl $0, %c[launched](%0) \n\t"
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/* Load guest registers. Don't clobber flags. */
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"mov %c[cr2](%0), %%"R"ax \n\t"
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"mov %%"R"ax, %%cr2 \n\t"
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"mov %c[rax](%0), %%"R"ax \n\t"
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"mov %c[rbx](%0), %%"R"bx \n\t"
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"mov %c[rdx](%0), %%"R"dx \n\t"
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"mov %c[rsi](%0), %%"R"si \n\t"
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"mov %c[rdi](%0), %%"R"di \n\t"
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"mov %c[rbp](%0), %%"R"bp \n\t"
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#ifdef CONFIG_X86_64
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"mov %c[cr2](%0), %%rax \n\t"
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"mov %%rax, %%cr2 \n\t"
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"mov %c[rax](%0), %%rax \n\t"
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"mov %c[rbx](%0), %%rbx \n\t"
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"mov %c[rdx](%0), %%rdx \n\t"
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"mov %c[rsi](%0), %%rsi \n\t"
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"mov %c[rdi](%0), %%rdi \n\t"
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"mov %c[rbp](%0), %%rbp \n\t"
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"mov %c[r8](%0), %%r8 \n\t"
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"mov %c[r9](%0), %%r9 \n\t"
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"mov %c[r10](%0), %%r10 \n\t"
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@ -3000,18 +3003,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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"mov %c[r13](%0), %%r13 \n\t"
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"mov %c[r14](%0), %%r14 \n\t"
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"mov %c[r15](%0), %%r15 \n\t"
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"mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
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#else
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"mov %c[cr2](%0), %%eax \n\t"
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"mov %%eax, %%cr2 \n\t"
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"mov %c[rax](%0), %%eax \n\t"
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"mov %c[rbx](%0), %%ebx \n\t"
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"mov %c[rdx](%0), %%edx \n\t"
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"mov %c[rsi](%0), %%esi \n\t"
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"mov %c[rdi](%0), %%edi \n\t"
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"mov %c[rbp](%0), %%ebp \n\t"
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"mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
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#endif
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"mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
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/* Enter guest mode */
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"jne .Llaunched \n\t"
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__ex(ASM_VMX_VMLAUNCH) "\n\t"
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@ -3019,15 +3013,15 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
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".Lkvm_vmx_return: "
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/* Save guest registers, load host registers, keep flags */
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"xchg %0, (%%"R"sp) \n\t"
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"mov %%"R"ax, %c[rax](%0) \n\t"
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"mov %%"R"bx, %c[rbx](%0) \n\t"
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"push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
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"mov %%"R"dx, %c[rdx](%0) \n\t"
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"mov %%"R"si, %c[rsi](%0) \n\t"
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"mov %%"R"di, %c[rdi](%0) \n\t"
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"mov %%"R"bp, %c[rbp](%0) \n\t"
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#ifdef CONFIG_X86_64
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"xchg %0, (%%rsp) \n\t"
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"mov %%rax, %c[rax](%0) \n\t"
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"mov %%rbx, %c[rbx](%0) \n\t"
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"pushq (%%rsp); popq %c[rcx](%0) \n\t"
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"mov %%rdx, %c[rdx](%0) \n\t"
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"mov %%rsi, %c[rsi](%0) \n\t"
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"mov %%rdi, %c[rdi](%0) \n\t"
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"mov %%rbp, %c[rbp](%0) \n\t"
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"mov %%r8, %c[r8](%0) \n\t"
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"mov %%r9, %c[r9](%0) \n\t"
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"mov %%r10, %c[r10](%0) \n\t"
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@ -3036,24 +3030,11 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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"mov %%r13, %c[r13](%0) \n\t"
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"mov %%r14, %c[r14](%0) \n\t"
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"mov %%r15, %c[r15](%0) \n\t"
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"mov %%cr2, %%rax \n\t"
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"mov %%rax, %c[cr2](%0) \n\t"
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"pop %%rbp; pop %%rbp; pop %%rdx \n\t"
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#else
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"xchg %0, (%%esp) \n\t"
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"mov %%eax, %c[rax](%0) \n\t"
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"mov %%ebx, %c[rbx](%0) \n\t"
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"pushl (%%esp); popl %c[rcx](%0) \n\t"
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"mov %%edx, %c[rdx](%0) \n\t"
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"mov %%esi, %c[rsi](%0) \n\t"
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"mov %%edi, %c[rdi](%0) \n\t"
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"mov %%ebp, %c[rbp](%0) \n\t"
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"mov %%cr2, %%eax \n\t"
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"mov %%eax, %c[cr2](%0) \n\t"
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"pop %%ebp; pop %%ebp; pop %%edx \n\t"
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#endif
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"mov %%cr2, %%"R"ax \n\t"
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"mov %%"R"ax, %c[cr2](%0) \n\t"
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"pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
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"setbe %c[fail](%0) \n\t"
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: : "c"(vmx), "d"((unsigned long)HOST_RSP),
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[launched]"i"(offsetof(struct vcpu_vmx, launched)),
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@ -3077,11 +3058,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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#endif
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[cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
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: "cc", "memory"
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, R"bx", R"di", R"si"
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#ifdef CONFIG_X86_64
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, "rbx", "rdi", "rsi"
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, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
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#else
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, "ebx", "edi", "rsi"
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#endif
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);
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@ -3111,6 +3090,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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vmx_complete_interrupts(vmx);
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}
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#undef R
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#undef Q
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static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
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{
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struct vcpu_vmx *vmx = to_vmx(vcpu);
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