Patch "KVM: nVMX: set IDTR and GDTR limits when loading L1 host state" has been added to the 4.9-stable tree

Patch "KVM: nVMX: set IDTR and GDTR limits when loading L1 host state" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

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

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     kvm-nvmx-set-idtr-and-gdtr-limits-when-loading-l1-host-state.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>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
@@ -10715,6 +10715,8 @@ 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)


Patches currently in stable-queue which might be from lprosek@redhat.com are

queue-4.9/kvm-nvmx-set-idtr-and-gdtr-limits-when-loading-l1-host-state.patch