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 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
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-4.4 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 @@ -10394,6 +10394,8 @@ 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-4.4/kvm-nvmx-set-idtr-and-gdtr-limits-when-loading-l1-host-state.patch