linux-kernel - [PATCH v2 0/3] KVM: VMX: Posted Interrupts fixes

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Date:   Mon, 11 Nov 2019 17:20:09 +0000
From:   Joao Martins <joao.m.martins@...cle.com>
To:     kvm@...r.kernel.org
Cc:     Joao Martins <joao.m.martins@...cle.com>,
        linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>,
        Liran Alon <liran.alon@...cle.com>,
        Jag Raman <jag.raman@...cle.com>
Subject: [PATCH v2 0/3] KVM: VMX: Posted Interrupts fixes

Hey,

This mini-series addresses two bugs plus a small cleanup: 

 1) Considering PID.PIR as opposed to just PID.ON for pending interrupt checks
    in the direct yield code path;
 
 2) Not changing NDST in vmx_vcpu_pi_load(), which addresses a regression. 
    Prior to this, we would observe Win2K12 guests hanging momentarily.
 
 3) Small cleanup to streamline PIR checks with a common helper.

The cleanup is done last to simplify backports.

	Joao

v2:
* Fixed missing Tb/Rb tags;
* Fixed broken Sob chains (on first two patches)
* Only test PID.PIR if PID.SN=1 (third patch)

Joao Martins (3):
  KVM: VMX: Consider PID.PIR to determine if vCPU has pending interrupts
  KVM: VMX: Do not change PID.NDST when loading a blocked vCPU
  KVM: VMX: Introduce pi_is_pir_empty() helper

 arch/x86/kvm/vmx/vmx.c | 21 +++++++++++++++++++--
 arch/x86/kvm/vmx/vmx.h | 11 +++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)

-- 
2.11.0