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 <[email protected]> --- 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 973bb4d..2962cb9 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1696,6 +1696,24 @@ static int do_tlb_inv_fn(struct device *dev, void *data) return iommu_tlb_invalidate(task->domain, dev, &ustruct->info); } +static int +vfio_iommu_bind_guest_msi(struct vfio_iommu *iommu, + struct vfio_iommu_type1_guest_msi_binding *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_iommu_dispatch_task(struct vfio_iommu *iommu, void *data, int (*fn)(struct device *, void *)) { @@ -1822,6 +1840,19 @@ static long vfio_iommu_type1_ioctl(void *iommu_data, return vfio_iommu_dispatch_task(iommu, (u8 *)&ustruct, do_tlb_inv_fn); + } else if (cmd == VFIO_IOMMU_BIND_MSI) { + struct vfio_iommu_type1_guest_msi_binding ustruct; + + minsz = offsetofend(struct vfio_iommu_type1_guest_msi_binding, + 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 b59f9fc..b7a9943 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -680,6 +680,13 @@ struct vfio_iommu_type1_tlb_invalidate { }; #define VFIO_IOMMU_TLB_INVALIDATE _IO(VFIO_TYPE, VFIO_BASE + 23) +struct vfio_iommu_type1_guest_msi_binding { + __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 -------- */ /* -- 2.5.5 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
