[PATCH 0/2] KVM: SVM: Final C-bit fixes?

From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Peter Gonda <pgonda@google.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Tom Lendacky <thomas.lendacky@amd.com>
Subject: [PATCH 0/2] KVM: SVM: Final C-bit fixes?
Date: Thu, 24 Jun 2021 19:03:52 -0700	[thread overview]
Message-ID: <20210625020354.431829-1-seanjc@google.com> (raw)

Patch 01 reverts the C-bit truncation patch as the reserved #PF was
confirmed to be due to a magic HyperTransport region (how many magic
addresses are there!?!).  Hopefully the original patch simply be dropped,
but just in case...

Patch 02 reverts the C-bit clearing in the #NPF handler.  If that somehow
turns out to be incorrect, i.e. there are flows where the CPU doesn't
mask off the C-bit, then it can be conditional on a SEV guest.

I'll be offline for the next two weeks, fingers crossed I've undone all
the damage.  :-)

Thanks!

Sean Christopherson (2):
  Revert "KVM: x86: Truncate reported guest MAXPHYADDR to C-bit if SEV
    is supported"
  KVM: SVM: Revert clearing of C-bit on GPA in #NPF handler

 arch/x86/kvm/cpuid.c   | 11 -----------
 arch/x86/kvm/svm/svm.c | 39 +++++++++------------------------------
 arch/x86/kvm/x86.c     |  3 ---
 arch/x86/kvm/x86.h     |  1 -
 4 files changed, 9 insertions(+), 45 deletions(-)

-- 
2.32.0.93.g670b81a890-goog