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

[ Upstream commit 21f2d551183847bc7fbe8d866151d00cdad18752 ]

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>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 33c1b5311b988f43cf8daa105cd97305f5b18987..2012b7b930ab39cf42e6fa904a4b51a943e015ea 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -9966,6 +9966,8 @@ 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)