From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [RFC v3 06/21] vfio: VFIO_IOMMU_BIND_MSI Date: Tue, 8 Jan 2019 11:26:18 +0100 Message-ID: <20190108102633.17482-7-eric.auger@redhat.com> References: <20190108102633.17482-1-eric.auger@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190108102633.17482-1-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kvmarm-FPEHb7Xf0XXUo1n7N8X6UoWGPAHP3yOg@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jacob.jun.pan-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, yi.l.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, robin.murphy-5wv7dgnIgG8@public.gmane.org Cc: marc.zyngier-5wv7dgnIgG8@public.gmane.org, peter.maydell-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, kevin.tian-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org, christoffer.dall-5wv7dgnIgG8@public.gmane.org List-Id: iommu@lists.linux-foundation.org This patch adds the VFIO_IOMMU_BIND_MSI ioctl which aims at passing the guest MSI binding to the host. Signed-off-by: Eric Auger --- v2 -> v3: - adapt to new proto of bind_guest_msi - directly use vfio_iommu_for_each_dev v1 -> v2: - s/vfio_iommu_type1_guest_msi_binding/vfio_iommu_type1_bind_guest_msi --- drivers/vfio/vfio_iommu_type1.c | 27 +++++++++++++++++++++++++++ include/uapi/linux/vfio.h | 7 +++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index c3ba3f249438..59229f6e2d84 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1673,6 +1673,15 @@ static int vfio_cache_inv_fn(struct device *dev, void *data) return iommu_cache_invalidate(d, dev, &ustruct->info); } +static int vfio_bind_guest_msi_fn(struct device *dev, void *data) +{ + struct vfio_iommu_type1_bind_guest_msi *ustruct = + (struct vfio_iommu_type1_bind_guest_msi *)data; + struct iommu_domain *d = iommu_get_domain_for_dev(dev); + + return iommu_bind_guest_msi(d, dev, &ustruct->binding); +} + static int vfio_set_pasid_table(struct vfio_iommu *iommu, struct vfio_iommu_type1_set_pasid_table *ustruct) @@ -1792,6 +1801,24 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, vfio_cache_inv_fn); mutex_unlock(&iommu->lock); return ret; + } else if (cmd == VFIO_IOMMU_BIND_MSI) { + struct vfio_iommu_type1_bind_guest_msi ustruct; + int ret; + + minsz = offsetofend(struct vfio_iommu_type1_bind_guest_msi, + binding); + + if (copy_from_user(&ustruct, (void __user *)arg, minsz)) + return -EFAULT; + + if (ustruct.argsz < minsz || ustruct.flags) + return -EINVAL; + + mutex_lock(&iommu->lock); + ret = vfio_iommu_for_each_dev(iommu, &ustruct, + vfio_bind_guest_msi_fn); + mutex_unlock(&iommu->lock); + return ret; } return -ENOTTY; diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 11a07165e7e1..352e795a93c8 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -774,6 +774,13 @@ struct vfio_iommu_type1_cache_invalidate { }; #define VFIO_IOMMU_CACHE_INVALIDATE _IO(VFIO_TYPE, VFIO_BASE + 23) +struct vfio_iommu_type1_bind_guest_msi { + __u32 argsz; + __u32 flags; + struct iommu_guest_msi_binding binding; +}; +#define VFIO_IOMMU_BIND_MSI _IO(VFIO_TYPE, VFIO_BASE + 24) + /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ /* -- 2.17.2