linux-kernel - [PATCH v4 0/2] KVM: nSVM: ondemand nested state allocation

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Message-Id: <20200917101048.739691-1-mlevitsk@redhat.com>
Date:   Thu, 17 Sep 2020 13:10:46 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        Jim Mattson <jmattson@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Joerg Roedel <joro@...tes.org>,
        x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Maxim Levitsky <mlevitsk@...hat.com>
Subject: [PATCH v4 0/2] KVM: nSVM: ondemand nested state allocation

This is new version of ondemand nested state allocation.

In this version I dropped the changes to set_efer and instead
added a new request KVM_REQ_OUT_OF_MEMORY which makes the kvm
exit to userspace with KVM_EXIT_INTERNAL_ERROR

This request is used in (unlikely) case of memory allocation
failure.

Maxim Levitsky (2):
  KVM: add request KVM_REQ_OUT_OF_MEMORY
  KVM: nSVM: implement ondemand allocation of the nested state

 arch/x86/kvm/svm/nested.c | 42 ++++++++++++++++++++++++++++++
 arch/x86/kvm/svm/svm.c    | 54 ++++++++++++++++++++++-----------------
 arch/x86/kvm/svm/svm.h    |  7 +++++
 arch/x86/kvm/x86.c        |  7 +++++
 include/linux/kvm_host.h  |  1 +
 5 files changed, 87 insertions(+), 24 deletions(-)

-- 
2.26.2