linux-kernel - [PATCH 0/2] KVM: x86: Fixes for SEV-ES state tracking

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Date:   Fri,  7 May 2021 09:59:45 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peter Gonda <pgonda@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH 0/2] KVM: x86: Fixes for SEV-ES state tracking

For SEV-ES guests, Ensure KVM's model of EFER is up-to-date after a CR0
load, and let userspace set tracked state via KVM_SET_SREGS, relying on
the vendor code to not propagate the changes to hardware (VMCB in this
case).

Peter, patch 02 is different than what I sent to you off list.  I'm still
100% convinced that the load_pdptrs() call is flawed, but Maxim has an
in-progress series that's tackling the PDPTR save/restore mess.

Sean Christopherson (2):
  KVM: SVM: Update EFER software model on CR0 trap for SEV-ES
  KVM: x86: Allow userspace to update tracked sregs for protected guests

 arch/x86/kvm/svm/svm.c |  8 +++--
 arch/x86/kvm/x86.c     | 73 ++++++++++++++++++++++++------------------
 2 files changed, 47 insertions(+), 34 deletions(-)

-- 
2.31.1.607.g51e8a6a459-goog