[0/4] VMX: configure posted interrupt descriptor when assigning device

Message ID	20210507130609.269153197@redhat.com (mailing list archive)
Headers	show Return-Path: <kvm-owner@kernel.org> Message-ID: <20210507130609.269153197@redhat.com> User-Agent: quilt/0.66 Date: Fri, 07 May 2021 10:06:09 -0300 From: Marcelo Tosatti <mtosatti@redhat.com> To: kvm@vger.kernel.org Cc: Paolo Bonzini <pbonzini@redhat.com>, Alex Williamson <alex.williamson@redhat.com>, Sean Christopherson <seanjc@google.com> Subject: [patch 0/4] VMX: configure posted interrupt descriptor when assigning device Precedence: bulk
Series	VMX: configure posted interrupt descriptor when assigning device \| expand [0/4] VMX: configure posted interrupt descriptor when assigning device [1/4] KVM: x86: add start_assignment hook to kvm_x86_ops [2/4] KVM: add arch specific vcpu_check_block callback [3/4] KVM: x86: implement kvm_arch_vcpu_check_block callback [4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device

Message ID

20210507130609.269153197@redhat.com (mailing list archive)

Headers

Message-ID: <20210507130609.269153197@redhat.com>
User-Agent: quilt/0.66
Date: Fri, 07 May 2021 10:06:09 -0300
From: Marcelo Tosatti <mtosatti@redhat.com>
To: kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Sean Christopherson <seanjc@google.com>
Subject: [patch 0/4] VMX: configure posted interrupt descriptor when assigning
 device
Precedence: bulk

Series

VMX: configure posted interrupt descriptor when assigning device | expand

Message

Marcelo Tosatti May 7, 2021, 1:06 p.m. UTC

Configuration of the posted interrupt descriptor is incorrect when devices
are hotplugged to the guest (and vcpus are halted).

See patch 4 for details.

---

v2: rather than using a potentially racy IPI (vs vcpu->cpu switches),
    kick the vcpus when assigning a device and let the blocked per-CPU
    list manipulation happen locally at ->pre_block and ->post_block
    (Sean Christopherson).