From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger Subject: [RFC v2 06/20] vfio: VFIO_IOMMU_BIND_MSI Date: Tue, 18 Sep 2018 16:24:43 +0200 Message-ID: <20180918142457.3325-7-eric.auger@redhat.com> References: <20180918142457.3325-1-eric.auger@redhat.com> Return-path: In-Reply-To: <20180918142457.3325-1-eric.auger@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: eric.auger.pro@gmail.com, eric.auger@redhat.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, joro@8bytes.org, alex.williamson@redhat.com, jacob.jun.pan@linux.intel.com, yi.l.liu@linux.intel.com, jean-philippe.brucker@arm.com, will.deacon@arm.com, robin.murphy@arm.com Cc: tianyu.lan@intel.com, ashok.raj@intel.com, marc.zyngier@arm.com, christoffer.dall@arm.com, peter.maydell@linaro.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 --- v1 -> v2: - s/vfio_iommu_type1_guest_msi_binding/vfio_iommu_type1_bind_guest_msi --- drivers/vfio/vfio_iommu_type1.c | 31 +++++++++++++++++++++++++++++++ include/uapi/linux/vfio.h | 7 +++++++ 2 files changed, 38 insertions(+) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 14529233f774..2ffd46c26dc3 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1704,6 +1704,24 @@ vfio_cache_invalidate(struct vfio_iommu *iommu, return ret; } +static int +vfio_iommu_bind_guest_msi(struct vfio_iommu *iommu, + struct vfio_iommu_type1_bind_guest_msi *ustruct) +{ + struct vfio_domain *d; + int ret; + + mutex_lock(&iommu->lock); + + list_for_each_entry(d, &iommu->domain_list, next) { + ret = iommu_bind_guest_msi(d->domain, &ustruct->binding); + if (ret) + break; + } + mutex_unlock(&iommu->lock); + return ret; +} + static int vfio_bind_pasid_table(struct vfio_iommu *iommu, struct vfio_iommu_type1_bind_pasid_table *ustruct) @@ -1818,6 +1836,19 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, return -EINVAL; return vfio_cache_invalidate(iommu, &ustruct); + } else if (cmd == VFIO_IOMMU_BIND_MSI) { + struct vfio_iommu_type1_bind_guest_msi ustruct; + + 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; + + return vfio_iommu_bind_guest_msi(iommu, &ustruct); } return -ENOTTY; diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 2a38d0bca0ca..6fb5e944e73c 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -680,6 +680,13 @@ 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 -------- */ /* -- 2.17.1