[PATCH] KVM: x86: don't reset root in kvm_mmu_setup()

[Wei Yang <richard.weiyang@xxxxxxxxx>]

Here is the code path which shows kvm_mmu_setup() is invoked after
kvm_mmu_create(). Since kvm_mmu_setup() is only invoked in this code path,
this means the root_hpa and prev_roots are setup properly. And it is not
necessary to reset it again.

    kvm_vm_ioctl_create_vcpu()
        kvm_arch_vcpu_create()
            vmx_create_vcpu()
                kvm_vcpu_init()
                    kvm_arch_vcpu_init()
                        kvm_mmu_create()
        kvm_arch_vcpu_setup()
            kvm_mmu_setup()
                kvm_init_mmu()

This patch set reset_roots to false in kmv_mmu_setup().

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
---
 arch/x86/kvm/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index a282321329b5..28da8a9bd37b 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5413,7 +5413,7 @@ void kvm_mmu_setup(struct kvm_vcpu *vcpu)
 {
 	MMU_WARN_ON(VALID_PAGE(vcpu->arch.mmu.root_hpa));
 
-	kvm_init_mmu(vcpu, true);
+	kvm_init_mmu(vcpu, false);
 }
 
 static void kvm_mmu_invalidate_zap_pages_in_memslot(struct kvm *kvm,
-- 
2.15.1