From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Williamson Subject: [PATCH 3/4] vfio: Add external user check extension interface Date: Mon, 17 Feb 2014 13:24:06 -0700 Message-ID: <20140217202406.22775.50151.stgit@bling.home> References: <20140217201324.22775.31904.stgit@bling.home> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org To: alex.williamson@redhat.com, kvm@vger.kernel.org Return-path: In-Reply-To: <20140217201324.22775.31904.stgit@bling.home> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org This lets us check extensions, particularly VFIO_DMA_CC_IOMMU using the external user interface, allowing KVM to probe IOMMU coherency. Signed-off-by: Alex Williamson --- drivers/vfio/vfio.c | 6 ++++++ include/linux/vfio.h | 2 ++ 2 files changed, 8 insertions(+) diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 21271d8..512f479 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -1413,6 +1413,12 @@ int vfio_external_user_iommu_id(struct vfio_group *group) } EXPORT_SYMBOL_GPL(vfio_external_user_iommu_id); +long vfio_external_check_extension(struct vfio_group *group, unsigned long arg) +{ + return vfio_ioctl_check_extension(group->container, arg); +} +EXPORT_SYMBOL_GPL(vfio_external_check_extension); + /** * Module/class support */ diff --git a/include/linux/vfio.h b/include/linux/vfio.h index 24579a0..81022a52 100644 --- a/include/linux/vfio.h +++ b/include/linux/vfio.h @@ -96,5 +96,7 @@ extern void vfio_unregister_iommu_driver( extern struct vfio_group *vfio_group_get_external_user(struct file *filep); extern void vfio_group_put_external_user(struct vfio_group *group); extern int vfio_external_user_iommu_id(struct vfio_group *group); +extern long vfio_external_check_extension(struct vfio_group *group, + unsigned long arg); #endif /* VFIO_H */