From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52155) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d3KBl-0007GD-Jx for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d3KBk-0004Um-N1 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:49 -0400 Received: from mga03.intel.com ([134.134.136.65]:33549) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1d3KBk-0004JF-D9 for qemu-devel@nongnu.org; Wed, 26 Apr 2017 06:28:48 -0400 From: "Liu, Yi L" Date: Wed, 26 Apr 2017 18:12:04 +0800 Message-Id: <1493201525-14418-8-git-send-email-yi.l.liu@intel.com> In-Reply-To: <1493201525-14418-1-git-send-email-yi.l.liu@intel.com> References: <1493201525-14418-1-git-send-email-yi.l.liu@intel.com> Subject: [Qemu-devel] [RFC PATCH 7/8] VFIO: Add new IOCTL for IOMMU TLB invalidate propagation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kvm@vger.kernel.org, iommu@lists.linux-foundation.org, alex.williamson@redhat.com, peterx@redhat.com Cc: jasowang@redhat.com, qemu-devel@nongnu.org, kevin.tian@intel.com, ashok.raj@intel.com, jacob.jun.pan@intel.com, tianyu.lan@intel.com, yi.l.liu@intel.com, jean-philippe.brucker@arm.com, "Liu, Yi L" From: "Liu, Yi L" This patch adds VFIO_IOMMU_TLB_INVALIDATE to propagate IOMMU TLB invalidate request from guest to host. In the case of SVM virtualization on VT-d, host IOMMU driver has no knowledge of caching structure updates unless the guest invalidation activities are passed down to the host. So a new IOCTL is needed to propagate the guest cache invalidation through VFIO. Signed-off-by: Liu, Yi L --- include/uapi/linux/vfio.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 6b97987..50c51f8 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -564,6 +564,15 @@ struct vfio_device_svm { #define VFIO_IOMMU_SVM_BIND_TASK _IO(VFIO_TYPE, VFIO_BASE + 22) +/* For IOMMU TLB Invalidation Propagation */ +struct vfio_iommu_tlb_invalidate { + __u32 argsz; + __u32 length; + __u8 data[]; +}; + +#define VFIO_IOMMU_TLB_INVALIDATE _IO(VFIO_TYPE, VFIO_BASE + 23) + /* -------- Additional API for SPAPR TCE (Server POWERPC) IOMMU -------- */ /* -- 1.9.1