linux-kernel - [PATCH v3 0/4] Allow AVIC's IPI virtualization to be optional

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Message-Id: <20231002115723.175344-1-mlevitsk@redhat.com>
Date:   Mon,  2 Oct 2023 14:57:19 +0300
From:   Maxim Levitsky <mlevitsk@...hat.com>
To:     kvm@...r.kernel.org
Cc:     Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Sean Christopherson <seanjc@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Robin Murphy <robin.murphy@....com>, iommu@...ts.linux.dev,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH v3 0/4] Allow AVIC's IPI virtualization to be optional

Hi!

This patch allows AVIC's ICR emulation to be optional and thus allows
to workaround AVIC's errata #1235 by disabling this portion of the feature.

This is v3 of my patch series 'AVIC bugfixes and workarounds' including
review feedback.

Best regards,
    Maxim Levitsky

Maxim Levitsky (4):
  KVM: Add per vCPU flag specifying that a vCPU is loaded
  x86: KVM: AVIC: stop using 'is_running' bit in avic_vcpu_put()
  x86: KVM: don't read physical ID table entry in avic_pi_update_irte()
  x86: KVM: SVM: allow optionally to disable AVIC's IPI virtualization

 arch/x86/kvm/svm/avic.c  | 72 ++++++++++++++++++++++++++--------------
 include/linux/kvm_host.h |  1 +
 virt/kvm/kvm_main.c      | 10 ++++++
 3 files changed, 59 insertions(+), 24 deletions(-)

-- 
2.26.3