Tested-by: Pavel Fedin <p.fe...@samsung.com> Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia
> -----Original Message----- > From: Eric Auger [mailto:eric.au...@linaro.org] > Sent: Monday, August 03, 2015 6:31 PM > To: eric.au...@st.com; eric.au...@linaro.org; > linux-arm-ker...@lists.infradead.org; > kvm...@lists.cs.columbia.edu; k...@vger.kernel.org; > christoffer.d...@linaro.org; > marc.zyng...@arm.com > Cc: linux-kernel@vger.kernel.org; patc...@linaro.org; pbonz...@redhat.com; > andre.przyw...@arm.com; p.fe...@samsung.com > Subject: [PATCH v3 0/7] KVM: arm/arm64: gsi routing support > > With the advent of GICv3 ITS in-kernel emulation, KVM GSI routing > appears to be requested. More specifically MSI routing is needed. > irqchip routing does not sound to be really useful on arm but usage of > MSI routing also mandates to integrate irqchip routing. The initial > implementation of irqfd on arm must be upgraded with the integration > of kvm irqchip.c code and the implementation of its standard hooks > in the architecture specific part. > > In case KVM_SET_GSI_ROUTING ioctl is not called, a default routing > table with flat irqchip routing entries is built enabling to inject gsi > corresponding to the SPI indexes seen by the guest. > > As soon as KVM_SET_GSI_ROUTING is called, user-space overwrites this > default routing table and is responsible for building the whole routing > table. > > for arm/arm64 KVM_SET_GSI_ROUTING has a limited support: > - only applies to KVM_IRQFD and not to KVM_IRQ_LINE > > - irqchip routing was tested on Calxeda midway (VFIO with irqfd) > with and without explicit routing > - MSI routing without GICv3 ITS was tested using APM Xgene-I > (qemu VIRTIO-PCI vhost-net without gsi_direct_mapping). > - MSI routing with GICv3 ITS is *NOT* tested. > > Code can be found at https://git.linaro.org/people/eric.auger/linux.git/shortlog/refs/heads/v4.2-rc4- > gsi-routing-v3 > > It applies on Andre's [PATCH v2 00/15] KVM: arm64: GICv3 ITS emulation > (http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/355727.html) > > History: > v2 -> v3: > - eventually got rid of KVM_IRQ_ROUTING_EXTENDED_MSI new type at user > api level and use KVM_MSI_VALID_DEVID flag instead > - remove usage of KVM_IRQ_ROUTING_EXTENDED_MSI type at kernel level too. > - propagate user flags downto the kernel to make sure the userspace > correctly set devid in GICv3 ITS case (still under discussion) > > v1 -> v2: > - user API changed: > x devid id passed in kvm_irq_routing_msi > x kept the new routing entry type: KVM_IRQ_ROUTING_EXTENDED_MSI > - kvm_host.h: adopt Andre's proposal to replace the msi_msg by a struct > composed of the msi_msg and devid in kvm_kernel_irq_routing_entry > - Fix bug reported by Pavel: Added KVM_IRQ_ROUTING_EXTENDED_MSI handling > in eventfd.c > - added vgic_v2m_inject_msi in vgic-v2-emul.c as suggested by Andre > - fix bug reported by Andre: bad setting of msi.flags and msi.devid > in kvm_send_userspace_msi > - avoid injecting reserved IRQ numbers in vgic_irqfd_set_irq > > RFC -> PATCH: > - clearly state limited support on arm/arm64: > KVM_IRQ_LINE not impacted by GSI routing > - add default routing table feature (new patch file) > - changed uapi to use padding field area > - reword api.txt > > Eric Auger (7): > KVM: api: pass the devid in the msi routing entry > KVM: kvm_host: add devid in kvm_kernel_irq_routing_entry > KVM: irqchip: convey devid to kvm_set_msi > KVM: arm/arm64: enable irqchip routing > KVM: arm/arm64: build a default routing table > KVM: arm/arm64: enable MSI routing > KVM: arm: enable KVM_SIGNAL_MSI and MSI routing > > Documentation/virtual/kvm/api.txt | 35 ++++++++++--- > arch/arm/include/asm/kvm_host.h | 2 + > arch/arm/kvm/Kconfig | 3 ++ > arch/arm/kvm/Makefile | 2 +- > arch/arm64/include/asm/kvm_host.h | 1 + > arch/arm64/kvm/Kconfig | 2 + > arch/arm64/kvm/Makefile | 2 +- > include/kvm/arm_vgic.h | 2 - > include/linux/kvm_host.h | 8 ++- > include/uapi/linux/kvm.h | 5 +- > virt/kvm/arm/vgic-v2-emul.c | 16 ++++++ > virt/kvm/arm/vgic.c | 107 > ++++++++++++++++++++++++++++++-------- > virt/kvm/irqchip.c | 8 ++- > 13 files changed, 158 insertions(+), 35 deletions(-) > > -- > 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
