From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44049) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eZTAX-0004JA-Fl for qemu-devel@nongnu.org; Wed, 10 Jan 2018 22:04:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eZTAU-0002Ja-6E for qemu-devel@nongnu.org; Wed, 10 Jan 2018 22:04:41 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:53974 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eZTAU-0002J2-2X for qemu-devel@nongnu.org; Wed, 10 Jan 2018 22:04:38 -0500 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w0B34DZ5012629 for ; Wed, 10 Jan 2018 22:04:35 -0500 Received: from e36.co.us.ibm.com (e36.co.us.ibm.com [32.97.110.154]) by mx0b-001b2d01.pphosted.com with ESMTP id 2fdxuv9wwt-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Wed, 10 Jan 2018 22:04:35 -0500 Received: from localhost by e36.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 10 Jan 2018 20:04:34 -0700 From: Dong Jia Shi Date: Thu, 11 Jan 2018 04:04:20 +0100 In-Reply-To: <20180111030421.31418-1-bjsdjshi@linux.vnet.ibm.com> References: <20180111030421.31418-1-bjsdjshi@linux.vnet.ibm.com> Message-Id: <20180111030421.31418-3-bjsdjshi@linux.vnet.ibm.com> Subject: [Qemu-devel] [RFC PATCH 2/3] vfio: ccw: introduce channel path irq List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, qemu-devel@nongnu.org, qemu-s390x@nongnu.org Cc: cohuck@redhat.com, borntraeger@de.ibm.com, bjsdjshi@linux.vnet.ibm.com, pasic@linux.vnet.ibm.com, pmorel@linux.vnet.ibm.com This introduces a new irq for vfio-ccw to provide channel path related event for userland. Signed-off-by: Dong Jia Shi --- drivers/s390/cio/vfio_ccw_ops.c | 29 +++++++++++++++++++++-------- drivers/s390/cio/vfio_ccw_private.h | 2 ++ include/uapi/linux/vfio.h | 1 + 3 files changed, 24 insertions(+), 8 deletions(-) diff --git a/drivers/s390/cio/vfio_ccw_ops.c b/drivers/s390/cio/vfio_ccw_ops.c index 9528fce2e7d9..972cfc8834fc 100644 --- a/drivers/s390/cio/vfio_ccw_ops.c +++ b/drivers/s390/cio/vfio_ccw_ops.c @@ -275,17 +275,20 @@ static int vfio_ccw_mdev_get_region_info(struct vfio_region_info *info, static int vfio_ccw_mdev_get_irq_info(struct vfio_irq_info *info) { - if (info->index != VFIO_CCW_IO_IRQ_INDEX) + switch (info->index) { + case VFIO_CCW_IO_IRQ_INDEX: + case VFIO_CCW_CHP_IRQ_INDEX: + info->count = 1; + info->flags = VFIO_IRQ_INFO_EVENTFD; + return 0; + default: return -EINVAL; - - info->count = 1; - info->flags = VFIO_IRQ_INFO_EVENTFD; - - return 0; + } } static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev, uint32_t flags, + unsigned index, void __user *data) { struct vfio_ccw_private *private; @@ -295,7 +298,17 @@ static int vfio_ccw_mdev_set_irqs(struct mdev_device *mdev, return -EINVAL; private = dev_get_drvdata(mdev_parent_dev(mdev)); - ctx = &private->io_trigger; + + switch (index) { + case VFIO_CCW_IO_IRQ_INDEX: + ctx = &private->io_trigger; + break; + case VFIO_CCW_CHP_IRQ_INDEX: + ctx = &private->chp_trigger; + break; + default: + return -EINVAL; + } switch (flags & VFIO_IRQ_SET_DATA_TYPE_MASK) { case VFIO_IRQ_SET_DATA_NONE: @@ -433,7 +446,7 @@ static ssize_t vfio_ccw_mdev_ioctl(struct mdev_device *mdev, return ret; data = (void __user *)(arg + minsz); - return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, data); + return vfio_ccw_mdev_set_irqs(mdev, hdr.flags, hdr.index, data); } case VFIO_DEVICE_RESET: return vfio_ccw_mdev_reset(mdev); diff --git a/drivers/s390/cio/vfio_ccw_private.h b/drivers/s390/cio/vfio_ccw_private.h index 460c8b90d834..da86f82dd7b9 100644 --- a/drivers/s390/cio/vfio_ccw_private.h +++ b/drivers/s390/cio/vfio_ccw_private.h @@ -33,6 +33,7 @@ * @irb: irb info received from interrupt * @scsw: scsw info * @io_trigger: eventfd ctx for signaling userspace I/O results + * @chp_trigger: eventfd ctx for signaling userspace chp event * @io_work: work for deferral process of I/O handling */ struct vfio_ccw_private { @@ -50,6 +51,7 @@ struct vfio_ccw_private { union scsw scsw; struct eventfd_ctx *io_trigger; + struct eventfd_ctx *chp_trigger; struct work_struct io_work; } __aligned(8); diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index c60244debf71..179a7492d53a 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -463,6 +463,7 @@ enum { enum { VFIO_CCW_IO_IRQ_INDEX, + VFIO_CCW_CHP_IRQ_INDEX, VFIO_CCW_NUM_IRQS }; -- 2.13.5