[PATCH 3.2 08/79] KVM: nVMX: set IDTR and GDTR limits when loading L1 host state

[Ben Hutchings]

3.2.99-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Ladi Prosek <lprosek@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 arch/x86/kvm/vmx.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -7076,6 +7076,8 @@ void load_vmcs12_host_state(struct kvm_v
 	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);
 	vmcs_writel(GUEST_TR_BASE, vmcs12->host_tr_base);
 	vmcs_writel(GUEST_GS_BASE, vmcs12->host_gs_base);
 	vmcs_writel(GUEST_FS_BASE, vmcs12->host_fs_base);