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

Sean Christopherson
2025-03-20T14:20:24Z

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