KVM: nVMX: set IDTR and GDTR limits when loading L1 host state

commit 21f2d551183847bc7fbe8d866151d00cdad18752 upstream.

Intel SDM 27.5.2 Loading Host Segment and Descriptor-Table Registers:

"The GDTR and IDTR limits are each set to FFFFH."

Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index a9ca10baf936a4ad6ba85b13235996ee92fac70b..3f51f81233c569b4251649b4d1a4aa0dc7b638c0 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -8929,6 +8929,8 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
        vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip);
        vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base);
        vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base);
+       vmcs_write32(GUEST_IDTR_LIMIT, 0xFFFF);
+       vmcs_write32(GUEST_GDTR_LIMIT, 0xFFFF);
 
        /* If not VM_EXIT_CLEAR_BNDCFGS, the L2 value propagates to L1.  */
        if (vmcs12->vm_exit_controls & VM_EXIT_CLEAR_BNDCFGS)