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[v2,2/2] KVM: nVMX: Reset vmxon_ptr upon VMXOFF emulation.

Message ID 20210929175154.11396-3-yu.c.zhang@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Cleanups for pointer usages in nVMX. | expand

Commit Message

Yu Zhang Sept. 29, 2021, 5:51 p.m. UTC 
From: Vitaly Kuznetsov <vkuznets@redhat.com>

Currently, 'vmx->nested.vmxon_ptr' is not reset upon VMXOFF
emulation. This is not a problem per se as we never access
it when !vmx->nested.vmxon. But this should be done to avoid
any issue in the future.

Also, initialize the vmxon_ptr when vcpu is created.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
---
 arch/x86/kvm/vmx/nested.c | 1 +
 arch/x86/kvm/vmx/vmx.c    | 1 +
 2 files changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 25cf76c7fee8..d45b4041c8a5 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -290,6 +290,7 @@  static void free_nested(struct kvm_vcpu *vcpu)
 
 	vmx->nested.vmxon = false;
 	vmx->nested.smm.vmxon = false;
+	vmx->nested.vmxon_ptr = INVALID_GPA;
 	free_vpid(vmx->nested.vpid02);
 	vmx->nested.posted_intr_nv = -1;
 	vmx->nested.current_vmptr = INVALID_GPA;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 047992eb4b20..a66cc09f24d3 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6887,6 +6887,7 @@  static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
 	vcpu_setup_sgx_lepubkeyhash(vcpu);
 
 	vmx->nested.posted_intr_nv = -1;
+	vmx->nested.vmxon_ptr = INVALID_GPA;
 	vmx->nested.current_vmptr = INVALID_GPA;
 	vmx->nested.hv_evmcs_vmptr = EVMPTR_INVALID;