linux-kernel - [PATCH 0/3] KVM: x86: MSR completion refactoring for SEV-ES

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Date:   Mon, 14 Dec 2020 13:32:47 -0500
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Alexander Graf <graf@...zon.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: [PATCH 0/3] KVM: x86: MSR completion refactoring for SEV-ES

These patches remove kvm_inject_gp from the RDMSR/WRMSR emulation
path, with the purpose of letting SEV-ES inject the #GP through
the GHCB instead.

The main idea is to introduce a complete_emulated_msr callback
that is call-compatible with kvm_complete_insn_gp, so that svm.c
can just call kvm_complete_insn_gp in the common case.

I have more patches to use kvm_complete_insn_gp instead of
kvm_inject_gp in other paths, but they are not necessary for
SEV-ES so they can be delayed to 5.12.

Paolo

Paolo Bonzini (3):
  KVM: x86: remove bogus #GP injection
  KVM: x86: use kvm_complete_insn_gp in emulating RDMSR/WRMSR
  KVM: x86: introduce complete_emulated_msr callback

 arch/x86/include/asm/kvm_host.h |  1 +
 arch/x86/kvm/mtrr.c             |  6 +----
 arch/x86/kvm/svm/svm.c          |  1 +
 arch/x86/kvm/vmx/vmx.c          |  1 +
 arch/x86/kvm/x86.c              | 42 +++++++++++++--------------------
 5 files changed, 20 insertions(+), 31 deletions(-)

-- 
2.26.2