linux-kernel - [PATCH v2 0/3] KVM: x86: Add a module param for device posted IRQs

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Message-ID: <20250320142022.766201-1-seanjc@google.com>
Date: Thu, 20 Mar 2025 07:20:19 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Yosry Ahmed <yosry.ahmed@...ux.dev>
Subject: [PATCH v2 0/3] KVM: x86: Add a module param for device posted IRQs

Add a module param, enable_device_posted_irqs, to control and enumerate
KVM support for device posted IRQs.

v2:
 - Add prep patches to use kvm_arch_has_irq_bypass() in vendor code when
   querying support IRQ bypass, a.k.a. device posted IRQs, so as not to
   unexpectedly introduce a (desired) dependency on enable_apicv. [Yosry]
 - Use "&=" when constraining enable_device_posted_irqs based on APICv
   and IOMMU posting support. [Yosry]

v1: https://lore.kernel.org/all/20250315025615.2367411-1-seanjc@google.com


Sean Christopherson (3):
  KVM: VMX: Don't send UNBLOCK when starting device assignment without
    APICv
  KVM: SVM: Don't update IRTEs if APICv/AVIC is disable
  KVM: x86: Add a module param to control and enumerate device posted
    IRQs

 arch/x86/include/asm/kvm_host.h |  1 +
 arch/x86/kvm/svm/avic.c         |  3 +--
 arch/x86/kvm/vmx/posted_intr.c  |  7 +++----
 arch/x86/kvm/x86.c              | 10 +++++++++-
 4 files changed, 14 insertions(+), 7 deletions(-)


base-commit: c9ea48bb6ee6b28bbc956c1e8af98044618fed5e
-- 
2.49.0.395.g12beb8f557-goog