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[79.176.51.222]) by smtp.gmail.com with ESMTPSA id c20sm11334886wmd.36.2020.04.06.05.12.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2020 05:12:47 -0700 (PDT) Date: Mon, 6 Apr 2020 08:12:44 -0400 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Ard Biesheuvel , "richard.henderson@linaro.org" , "christophe.lyon@st.com" , kbuild test robot , "daniel.santos@pobox.com" , Jason Wang , "kbuild-all@lists.01.org" , Russell King , Linux ARM , Richard Earnshaw , Sudeep Dutt , Ashutosh Dixit , Arnd Bergmann , Greg Kroah-Hartman , "David S. Miller" , netdev@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org Subject: [PATCH v2 2/2] vhost: disable for OABI Message-ID: <20200406121233.109889-3-mst@redhat.com> References: <20200406121233.109889-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200406121233.109889-1-mst@redhat.com> X-Mailer: git-send-email 2.24.1.751.gd10ce2899c X-Mutt-Fcc: =sent Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org vhost is currently broken on the default ARM config. The reason is that that uses apcs-gnu which is the ancient OABI that is been deprecated for a long time. Given that virtio support on such ancient systems is not needed in the first place, let's just add something along the lines of depends on !ARM || AEABI to the virtio Kconfig declaration, and add a comment that it has to do with struct member alignment. Note: we can't make VHOST and VHOST_RING themselves have a dependency since these are selected. Add a new symbol for that. Suggested-by: Ard Biesheuvel Siggested-by: Richard Earnshaw Signed-off-by: Michael S. Tsirkin --- drivers/misc/mic/Kconfig | 2 +- drivers/net/caif/Kconfig | 2 +- drivers/vdpa/Kconfig | 2 +- drivers/vhost/Kconfig | 17 +++++++++++++---- 4 files changed, 16 insertions(+), 7 deletions(-) diff --git a/drivers/misc/mic/Kconfig b/drivers/misc/mic/Kconfig index 8f201d019f5a..3bfe72c59864 100644 --- a/drivers/misc/mic/Kconfig +++ b/drivers/misc/mic/Kconfig @@ -116,7 +116,7 @@ config MIC_COSM config VOP tristate "VOP Driver" - depends on VOP_BUS + depends on VOP_BUS && VHOST_DPN select VHOST_RING select VIRTIO help diff --git a/drivers/net/caif/Kconfig b/drivers/net/caif/Kconfig index 9db0570c5beb..661c25eb1c46 100644 --- a/drivers/net/caif/Kconfig +++ b/drivers/net/caif/Kconfig @@ -50,7 +50,7 @@ config CAIF_HSI config CAIF_VIRTIO tristate "CAIF virtio transport driver" - depends on CAIF && HAS_DMA + depends on CAIF && HAS_DMA && VHOST_DPN select VHOST_RING select VIRTIO select GENERIC_ALLOCATOR diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig index d0cb0e583a5d..aee28def466b 100644 --- a/drivers/vdpa/Kconfig +++ b/drivers/vdpa/Kconfig @@ -14,7 +14,7 @@ if VDPA_MENU config VDPA_SIM tristate "vDPA device simulator" - depends on RUNTIME_TESTING_MENU && HAS_DMA + depends on RUNTIME_TESTING_MENU && HAS_DMA && VHOST_DPN select VDPA select VHOST_RING select VHOST_IOTLB diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig index cb6b17323eb2..b3486e218f62 100644 --- a/drivers/vhost/Kconfig +++ b/drivers/vhost/Kconfig @@ -12,6 +12,15 @@ config VHOST_RING This option is selected by any driver which needs to access the host side of a virtio ring. +config VHOST_DPN + bool "VHOST dependencies" + depends on !ARM || AEABI + default y + help + Anything selecting VHOST or VHOST_RING must depend on VHOST_DPN. + This excludes the deprecated ARM ABI since that forces a 4 byte + alignment on all structs - incompatible with virtio spec requirements. + config VHOST tristate select VHOST_IOTLB @@ -27,7 +36,7 @@ if VHOST_MENU config VHOST_NET tristate "Host kernel accelerator for virtio net" - depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP) + depends on NET && EVENTFD && (TUN || !TUN) && (TAP || !TAP) && VHOST_DPN select VHOST ---help--- This kernel module can be loaded in host kernel to accelerate @@ -39,7 +48,7 @@ config VHOST_NET config VHOST_SCSI tristate "VHOST_SCSI TCM fabric driver" - depends on TARGET_CORE && EVENTFD + depends on TARGET_CORE && EVENTFD && VHOST_DPN select VHOST default n ---help--- @@ -48,7 +57,7 @@ config VHOST_SCSI config VHOST_VSOCK tristate "vhost virtio-vsock driver" - depends on VSOCKETS && EVENTFD + depends on VSOCKETS && EVENTFD && VHOST_DPN select VHOST select VIRTIO_VSOCKETS_COMMON default n @@ -62,7 +71,7 @@ config VHOST_VSOCK config VHOST_VDPA tristate "Vhost driver for vDPA-based backend" - depends on EVENTFD + depends on EVENTFD && VHOST_DPN select VHOST select VDPA help