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Message-ID: <55FC2699.10608@redhat.com> Date: Fri, 18 Sep 2015 16:58:33 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: Feng Wu <feng.wu@...el.com>, alex.williamson@...hat.com, joro@...tes.org, mtosatti@...hat.com Cc: eric.auger@...aro.org, kvm@...r.kernel.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v9 00/18] Add VT-d Posted-Interrupts support - including prerequisite series On 18/09/2015 16:29, Feng Wu wrote: > VT-d Posted-Interrupts is an enhancement to CPU side Posted-Interrupt. > With VT-d Posted-Interrupts enabled, external interrupts from > direct-assigned devices can be delivered to guests without VMM > intervention when guest is running in non-root mode. > > You can find the VT-d Posted-Interrtups Spec. in the following URL: > http://www.intel.com/content/www/us/en/intelligent-systems/intel-technology/vt-directed-io-spec.html Thanks. I will squash patches 2 and 14 together, and drop patch 3. Signed-off-bys are missing in patch 1 and 4. The patches exist elsewhere in the mailing list archives, so not a big deal. Or just reply to them with the S-o-b line. Alex, can you ack the series and review patch 12? Joerg, can you ack patch 18? Paolo > v9: > - Include the whole series: > [01/18]: irq bypasser manager > [02/18] - [06/18]: Common non-architecture part for VT-d PI and ARM side forwarded irq > [07/18] - [18/18]: VT-d PI part > > v8: > refer to the changelog in each patch > > v7: > * Define two weak irq bypass callbacks: > - kvm_arch_irq_bypass_start() > - kvm_arch_irq_bypass_stop() > * Remove the x86 dummy implementation of the above two functions. > * Print some useful information instead of WARN_ON() when the > irq bypass consumer unregistration fails. > * Fix an issue when calling pi_pre_block and pi_post_block. > > v6: > * Rebase on 4.2.0-rc6 > * Rebase on https://lkml.org/lkml/2015/8/6/526 and http://www.gossamer-threads.com/lists/linux/kernel/2235623 > * Make the add_consumer and del_consumer callbacks static > * Remove pointless INIT_LIST_HEAD to 'vdev->ctx[vector].producer.node)' > * Use dev_info instead of WARN_ON() when irq_bypass_register_producer fails > * Remove optional dummy callbacks for irq producer > > v4: > * For lowest-priority interrupt, only support single-CPU destination > interrupts at the current stage, more common lowest priority support > will be added later. > * Accoring to Marcelo's suggestion, when vCPU is blocked, we handle > the posted-interrupts in the HLT emulation path. > * Some small changes (coding style, typo, add some code comments) > > v3: > * Adjust the Posted-interrupts Descriptor updating logic when vCPU is > preempted or blocked. > * KVM_DEV_VFIO_DEVICE_POSTING_IRQ --> KVM_DEV_VFIO_DEVICE_POST_IRQ > * __KVM_HAVE_ARCH_KVM_VFIO_POSTING --> __KVM_HAVE_ARCH_KVM_VFIO_POST > * Add KVM_DEV_VFIO_DEVICE_UNPOST_IRQ attribute for VFIO irq, which > can be used to change back to remapping mode. > * Fix typo > > v2: > * Use VFIO framework to enable this feature, the VFIO part of this series is > base on Eric's patch "[PATCH v3 0/8] KVM-VFIO IRQ forward control" > * Rebase this patchset on git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git, > then revise some irq logic based on the new hierarchy irqdomain patches provided > by Jiang Liu <jiang.liu@...ux.intel.com> > > > *** BLURB HERE *** > > Alex Williamson (1): > virt: IRQ bypass manager > > Eric Auger (4): > KVM: arm/arm64: select IRQ_BYPASS_MANAGER > KVM: create kvm_irqfd.h > KVM: introduce kvm_arch functions for IRQ bypass > KVM: eventfd: add irq bypass consumer management > > Feng Wu (13): > KVM: x86: select IRQ_BYPASS_MANAGER > KVM: Extend struct pi_desc for VT-d Posted-Interrupts > KVM: Add some helper functions for Posted-Interrupts > KVM: Define a new interface kvm_intr_is_single_vcpu() > KVM: Make struct kvm_irq_routing_table accessible > KVM: make kvm_set_msi_irq() public > vfio: Register/unregister irq_bypass_producer > KVM: x86: Update IRTE for posted-interrupts > KVM: Implement IRQ bypass consumer callbacks for x86 > KVM: Add an arch specific hooks in 'struct kvm_kernel_irqfd' > KVM: Update Posted-Interrupts Descriptor when vCPU is preempted > KVM: Update Posted-Interrupts Descriptor when vCPU is blocked > iommu/vt-d: Add a command line parameter for VT-d posted-interrupts > > Documentation/kernel-parameters.txt | 1 + > Documentation/virtual/kvm/locking.txt | 12 ++ > MAINTAINERS | 7 + > arch/arm/kvm/Kconfig | 2 + > arch/arm/kvm/Makefile | 1 + > arch/arm64/kvm/Kconfig | 2 + > arch/arm64/kvm/Makefile | 1 + > arch/x86/include/asm/kvm_host.h | 24 +++ > arch/x86/kvm/Kconfig | 3 + > arch/x86/kvm/Makefile | 3 + > arch/x86/kvm/irq_comm.c | 32 ++- > arch/x86/kvm/lapic.c | 59 ++++++ > arch/x86/kvm/lapic.h | 2 + > arch/x86/kvm/trace.h | 33 ++++ > arch/x86/kvm/vmx.c | 361 +++++++++++++++++++++++++++++++++- > arch/x86/kvm/x86.c | 108 +++++++++- > drivers/iommu/irq_remapping.c | 12 +- > drivers/vfio/pci/Kconfig | 1 + > drivers/vfio/pci/vfio_pci_intrs.c | 9 + > drivers/vfio/pci/vfio_pci_private.h | 2 + > include/linux/irqbypass.h | 90 +++++++++ > include/linux/kvm_host.h | 29 +++ > include/linux/kvm_irqfd.h | 71 +++++++ > virt/kvm/Kconfig | 3 + > virt/kvm/eventfd.c | 142 +++++++------ > virt/kvm/irqchip.c | 10 - > virt/kvm/kvm_main.c | 3 + > virt/lib/Kconfig | 2 + > virt/lib/Makefile | 1 + > virt/lib/irqbypass.c | 257 ++++++++++++++++++++++++ > 30 files changed, 1182 insertions(+), 101 deletions(-) > create mode 100644 include/linux/irqbypass.h > create mode 100644 include/linux/kvm_irqfd.h > create mode 100644 virt/lib/Kconfig > create mode 100644 virt/lib/Makefile > create mode 100644 virt/lib/irqbypass.c > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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