| From 21f2d551183847bc7fbe8d866151d00cdad18752 Mon Sep 17 00:00:00 2001 |
| From: Ladi Prosek <lprosek@redhat.com> |
| Date: Wed, 11 Oct 2017 16:54:42 +0200 |
| Subject: KVM: nVMX: set IDTR and GDTR limits when loading L1 host state |
| |
| From: Ladi Prosek <lprosek@redhat.com> |
| |
| 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> |
| |
| --- |
| arch/x86/kvm/vmx.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| --- a/arch/x86/kvm/vmx.c |
| +++ b/arch/x86/kvm/vmx.c |
| @@ -8929,6 +8929,8 @@ static void load_vmcs12_host_state(struc |
| 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) |
