From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50831) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZcYvy-0003Ci-5o for qemu-devel@nongnu.org; Thu, 17 Sep 2015 09:09:11 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZcYvv-00064x-3X for qemu-devel@nongnu.org; Thu, 17 Sep 2015 09:09:05 -0400 From: David Gibson Date: Thu, 17 Sep 2015 23:09:11 +1000 Message-Id: <1442495357-26547-5-git-send-email-david@gibson.dropbear.id.au> In-Reply-To: <1442495357-26547-1-git-send-email-david@gibson.dropbear.id.au> References: <1442495357-26547-1-git-send-email-david@gibson.dropbear.id.au> Subject: [Qemu-devel] [RFC PATCH 04/10] vfio: Record host IOMMU's available IO page sizes List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: alex.williamson@redhat.com, aik@ozlabs.ru, gwshan@linux.vnet.ibm.com Cc: lvivier@redhat.com, thuth@redhat.com, qemu-devel@nongnu.org, qemu-ppc@nongnu.org, pbonzini@redhat.com, David Gibson Depending on the host IOMMU type we determine and record the available page sizes for IOMMU translation. We'll need this for other validation in future patches. Signed-off-by: David Gibson --- hw/vfio/common.c | 13 +++++++++++++ include/hw/vfio/vfio-common.h | 1 + 2 files changed, 14 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index c37f1a1..daaac48 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -680,6 +680,7 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1_IOMMU) || ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU)) { bool v2 = !!ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU); + struct vfio_iommu_type1_info info; ret = ioctl(group->fd, VFIO_GROUP_SET_CONTAINER, &fd); if (ret) { @@ -705,6 +706,15 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) */ container->iommu_data.min_iova = 0; container->iommu_data.max_iova = (hwaddr)-1; + + /* Assume just 4K IOVA page size */ + container->iommu_data.iova_pgsizes = 0x1000; + info.argsz = sizeof(info); + ret = ioctl(fd, VFIO_IOMMU_GET_INFO, &info); + /* Ignore errors */ + if ((ret == 0) && (info.flags & VFIO_IOMMU_INFO_PGSIZES)) { + container->iommu_data.iova_pgsizes = info.iova_pgsizes; + } } else if (ioctl(fd, VFIO_CHECK_EXTENSION, VFIO_SPAPR_TCE_IOMMU)) { struct vfio_iommu_spapr_tce_info info; @@ -748,6 +758,9 @@ static int vfio_connect_container(VFIOGroup *group, AddressSpace *as) container->iommu_data.min_iova = info.dma32_window_start; container->iommu_data.max_iova = container->iommu_data.min_iova + info.dma32_window_size - 1; + + /* Assume just 4K IOVA pages for now */ + container->iommu_data.iova_pgsizes = 0x1000; } else { error_report("vfio: No available IOMMU models"); ret = -EINVAL; diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 88ec213..c09db6d 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -77,6 +77,7 @@ typedef struct VFIOContainer { * that in future */ hwaddr min_iova, max_iova; + uint64_t iova_pgsizes; } iommu_data; QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; QLIST_HEAD(, VFIOGroup) group_list; -- 2.4.3