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KVM: nSVM: Introduce svm_copy_vmrun_state()

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Separate the code setting non-VMLOAD-VMSAVE state from
svm_set_nested_state() into its own function. This is going to be
re-used from svm_enter_smm()/svm_leave_smm().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210628104425.391276-4-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2021-06-28 12:44:22 +02:00 • committed by Paolo Bonzini
parent fb79f566e4
commit 0a75829076
2 changed files with 24 additions and 18 deletions
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40
arch/x86/kvm/svm/nested.c
View file

@ -701,6 +701,27 @@ out:
return ret;
}
/* Copy state save area fields which are handled by VMRUN */
void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
struct vmcb_save_area *to_save)
{
to_save->es = from_save->es;
to_save->cs = from_save->cs;
to_save->ss = from_save->ss;
to_save->ds = from_save->ds;
to_save->gdtr = from_save->gdtr;
to_save->idtr = from_save->idtr;
to_save->rflags = from_save->rflags | X86_EFLAGS_FIXED;
to_save->efer = from_save->efer;
to_save->cr0 = from_save->cr0;
to_save->cr3 = from_save->cr3;
to_save->cr4 = from_save->cr4;
to_save->rax = from_save->rax;
to_save->rsp = from_save->rsp;
to_save->rip = from_save->rip;
to_save->cpl = 0;
}
void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb)
{
to_vmcb->save.fs = from_vmcb->save.fs;
@ -1364,28 +1385,11 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
svm->nested.vmcb12_gpa = kvm_state->hdr.svm.vmcb_pa;
svm->vmcb01.ptr->save.es = save->es;
svm->vmcb01.ptr->save.cs = save->cs;
svm->vmcb01.ptr->save.ss = save->ss;
svm->vmcb01.ptr->save.ds = save->ds;
svm->vmcb01.ptr->save.gdtr = save->gdtr;
svm->vmcb01.ptr->save.idtr = save->idtr;
svm->vmcb01.ptr->save.rflags = save->rflags | X86_EFLAGS_FIXED;
svm->vmcb01.ptr->save.efer = save->efer;
svm->vmcb01.ptr->save.cr0 = save->cr0;
svm->vmcb01.ptr->save.cr3 = save->cr3;
svm->vmcb01.ptr->save.cr4 = save->cr4;
svm->vmcb01.ptr->save.rax = save->rax;
svm->vmcb01.ptr->save.rsp = save->rsp;
svm->vmcb01.ptr->save.rip = save->rip;
svm->vmcb01.ptr->save.cpl = 0;
svm_copy_vmrun_state(save, &svm->vmcb01.ptr->save);
nested_load_control_from_vmcb12(svm, ctl);
svm_switch_vmcb(svm, &svm->nested.vmcb02);
nested_vmcb02_prepare_control(svm);
kvm_make_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu);
ret = 0;
out_free:

2
arch/x86/kvm/svm/svm.h
View file

@ -464,6 +464,8 @@ void svm_leave_nested(struct vcpu_svm *svm);
void svm_free_nested(struct vcpu_svm *svm);
int svm_allocate_nested(struct vcpu_svm *svm);
int nested_svm_vmrun(struct kvm_vcpu *vcpu);
void svm_copy_vmrun_state(struct vmcb_save_area *from_save,
struct vmcb_save_area *to_save);
void nested_svm_vmloadsave(struct vmcb *from_vmcb, struct vmcb *to_vmcb);
int nested_svm_vmexit(struct vcpu_svm *svm);