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Message-ID: <55FC2BE7.4010405@redhat.com> Date: Fri, 18 Sep 2015 17:21:11 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: "Wu, Feng" <feng.wu@...el.com>, "alex.williamson@...hat.com" <alex.williamson@...hat.com>, "joro@...tes.org" <joro@...tes.org>, "mtosatti@...hat.com" <mtosatti@...hat.com> Cc: "eric.auger@...aro.org" <eric.auger@...aro.org>, "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>, "linux-kernel@...r.kernel.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 17:08, Wu, Feng wrote: > > >> -----Original Message----- >> From: Paolo Bonzini [mailto:pbonzini@...hat.com] >> Sent: Friday, September 18, 2015 10:59 PM >> To: Wu, Feng; 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-technolog >> y/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. >> > > Thanks for your quick response, Paolo! I didn't change the code > in patch 1 and 4, do I need to add s-o-b, if needed, I can reply > the patches. Yes, the s-o-b just means that the code passed through your hands. Note that I replied to patch 17, but no need to resend that one either---just mailing list discussion is enough. Paolo > Thanks, > Feng > >> 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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