From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52071) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YgTfs-0003AU-CS for qemu-devel@nongnu.org; Fri, 10 Apr 2015 03:48:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YgTfm-0005sR-8a for qemu-devel@nongnu.org; Fri, 10 Apr 2015 03:48:24 -0400 Received: from mail-wg0-f43.google.com ([74.125.82.43]:33799) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YgTfm-0005s9-35 for qemu-devel@nongnu.org; Fri, 10 Apr 2015 03:48:18 -0400 Received: by wgso17 with SMTP id o17so9518117wgs.1 for ; Fri, 10 Apr 2015 00:48:17 -0700 (PDT) From: Eric Auger Date: Fri, 10 Apr 2015 08:48:08 +0100 Message-Id: <1428652090-5354-1-git-send-email-eric.auger@linaro.org> Subject: [Qemu-devel] [PATCH v2 0/2] ARM adaptations for vhost irqfd setup List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger@st.com, eric.auger@linaro.org, qemu-devel@nongnu.org, pbonzini@redhat.com, peter.maydell@linaro.org, cornelia.huck@de.ibm.com, borntraeger@de.ibm.com, agraf@suse.de, james.hogan@imgtec.com Cc: aik@ozlabs.ru, kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org, patches@linaro.org After the introduction of gicv2m, this series adds missing pieces to run VIRTIO-PCI with vhost back-end on ARM. It is proposed to use the kvm_gsi_direct_mapping modality that sets the irqfd gsi to the MSI data value. With that trick there is no need to create a KVM MSI routing entry featuring a different gsi. The only adaptation needed for ARM consists in adding an architecture specific function that converts the MSI data field into the actual gsi index: there is an offset of 32 between the MSI data content (SPI ID) and the SPI index that is passed to KVM_IRQFD ioctl. Once this is done we can set the requested flags to enable vhost: kvm_gsi_direct_mapping, kvm_msi_via_irqfd_allowed. This was tested on XGene, on top of Christoffer's series, [PATCH 0/3] Add support for for GICv2m and MSIs to arm-virt (https://lists.gnu.org/archive/html/qemu-devel/2015-04/msg00881.html) Best Regards Eric v1 -> v2: - abort on i386/mips/s390x since those archs do not support kvm_gsi_direct_mapping Eric Auger (2): kvm: introduce kvm_arch_msi_data_to_gsi arm_gicv2m: set kvm_gsi_direct_mapping and kvm_msi_via_irqfd_allowed hw/intc/arm_gicv2m.c | 2 ++ include/sysemu/kvm.h | 2 ++ kvm-all.c | 2 +- target-arm/kvm.c | 5 +++++ target-i386/kvm.c | 5 +++++ target-mips/kvm.c | 5 +++++ target-ppc/kvm.c | 5 +++++ target-s390x/kvm.c | 5 +++++ 8 files changed, 30 insertions(+), 1 deletion(-) -- 1.8.3.2