[v2,0/4] Fix a race between posted interrupt delivery and migration in a nested VM

Message ID	20220828222544.1964917-1-mizhang@google.com (mailing list archive)
Headers	show Return-Path: <kvm-owner@kernel.org> Reply-To: Mingwei Zhang <mizhang@google.com> Date: Sun, 28 Aug 2022 22:25:40 +0000 Mime-Version: 1.0 Message-ID: <20220828222544.1964917-1-mizhang@google.com> Subject: [PATCH v2 0/4] Fix a race between posted interrupt delivery and migration in a nested VM From: Mingwei Zhang <mizhang@google.com> To: Sean Christopherson <seanjc@google.com>, Paolo Bonzini <pbonzini@redhat.com> Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Maxim Levitsky <mlevitsk@redhat.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Oliver Upton <oupton@google.com>, Mingwei Zhang <mizhang@google.com>, Jim Mattson <jmattson@google.com> Content-Type: text/plain; charset="UTF-8" Precedence: bulk
Series	Fix a race between posted interrupt delivery and migration in a nested VM \| expand [v2,0/4] Fix a race between posted interrupt delivery and migration in a nested VM [v2,1/4] KVM: x86: move the event handling of KVM_REQ_GET_VMCS12_PAGES into a common function [v2,2/4] KVM: selftests: Save/restore vAPIC state in migration tests [v2,3/4] KVM: selftests: Add support for posted interrupt handling in L2 [v2,4/4] KVM: selftests: Test if posted interrupt delivery race with migration

Message ID

20220828222544.1964917-1-mizhang@google.com (mailing list archive)

Headers

Reply-To: Mingwei Zhang <mizhang@google.com>
Date: Sun, 28 Aug 2022 22:25:40 +0000
Mime-Version: 1.0
Message-ID: <20220828222544.1964917-1-mizhang@google.com>
Subject: [PATCH v2 0/4] Fix a race between posted interrupt delivery and
 migration in a nested VM
From: Mingwei Zhang <mizhang@google.com>
To: Sean Christopherson <seanjc@google.com>,
        Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
        Maxim Levitsky <mlevitsk@redhat.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Oliver Upton <oupton@google.com>,
        Mingwei Zhang <mizhang@google.com>,
        Jim Mattson <jmattson@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Series

Fix a race between posted interrupt delivery and migration in a nested VM | expand

Message

Mingwei Zhang Aug. 28, 2022, 10:25 p.m. UTC

This patch set aims to fix a race condition between posted interrupt
delivery and migration for a nested VM. In particular, we proves that when
a nested vCPU is halted and just migrated, it will lose a posted
interrupt from another vCPU in the same VM.

Changelog:

v1 -> v2:
 - Replace the original vmcs12 bug fix patch into one that processes nested
   state pages request in a common function [paolo].
 - Update the commit messages [seanjc, oupton].
 - Remove vcpu_run_interruptable(), use __vcpu_run() instead [seanjc].
 - Fix format issue in prepare_posted_intr_desc() [seanjc].
 - Rebase to kvm/queue.

v1 link:
 - https://lore.kernel.org/lkml/20220802230718.1891356-6-mizhang@google.com/t/


Jim Mattson (1):
  KVM: selftests: Test if posted interrupt delivery race with migration

Mingwei Zhang (3):
  KVM: x86: move the event handling of KVM_REQ_GET_VMCS12_PAGES into a
    common function
  KVM: selftests: Save/restore vAPIC state in migration tests
  KVM: selftests: Add support for posted interrupt handling in L2

 arch/x86/kvm/x86.c                            |  29 +-
 tools/testing/selftests/kvm/.gitignore        |   1 +
 tools/testing/selftests/kvm/Makefile          |   1 +
 .../selftests/kvm/include/kvm_util_base.h     |  10 +
 .../selftests/kvm/include/x86_64/processor.h  |   1 +
 .../selftests/kvm/include/x86_64/vmx.h        |  10 +
 .../selftests/kvm/lib/x86_64/processor.c      |   2 +
 tools/testing/selftests/kvm/lib/x86_64/vmx.c  |  14 +
 .../kvm/x86_64/vmx_migrate_pi_pending.c       | 291 ++++++++++++++++++
 9 files changed, 353 insertions(+), 6 deletions(-)
 create mode 100644 tools/testing/selftests/kvm/x86_64/vmx_migrate_pi_pending.c


base-commit: 372d07084593dc7a399bf9bee815711b1fb1bcf2