On Sun, Feb 09, 2020 at 01:31:10PM +0100, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 7adacf5eb2d2048045d9fd8fdab861fd9e7e2e96 Mon Sep 17 00:00:00 2001 From: Paolo Bonzini <pbonzini@xxxxxxxxxx> Date: Wed, 4 Dec 2019 15:50:27 +0100 Subject: [PATCH] KVM: x86: use CPUID to locate host page table reserved bits The comment in kvm_get_shadow_phys_bits refers to MKTME, but the same is actually true of SME and SEV. Just use CPUID[0x8000_0008].EAX[7:0] unconditionally if available, it is simplest and works even if memory is not encrypted. Cc: stable@xxxxxxxxxxxxxxx Reported-by: Tom Lendacky <thomas.lendacky@xxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
I've fixed it up and queued for 5.4 and 4.19. -- Thanks, Sasha
