From patchwork Wed Jan 29 12:16:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 11356073 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D8E03112B for ; Wed, 29 Jan 2020 12:12:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0B6D2071E for ; Wed, 29 Jan 2020 12:12:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726794AbgA2MLw (ORCPT ); Wed, 29 Jan 2020 07:11:52 -0500 Received: from mga04.intel.com ([192.55.52.120]:15948 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726735AbgA2MLt (ORCPT ); Wed, 29 Jan 2020 07:11:49 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jan 2020 04:11:49 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,377,1574150400"; d="scan'208";a="314071033" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by fmsmga001.fm.intel.com with ESMTP; 29 Jan 2020 04:11:48 -0800 From: "Liu, Yi L" To: qemu-devel@nongnu.org, david@gibson.dropbear.id.au, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com Cc: mst@redhat.com, eric.auger@redhat.com, kevin.tian@intel.com, yi.l.liu@intel.com, jun.j.tian@intel.com, yi.y.sun@intel.com, kvm@vger.kernel.org, hao.wu@intel.com, Jacob Pan , Yi Sun Subject: [RFC v3 12/25] vfio/common: add pasid_alloc/free support Date: Wed, 29 Jan 2020 04:16:43 -0800 Message-Id: <1580300216-86172-13-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1580300216-86172-1-git-send-email-yi.l.liu@intel.com> References: <1580300216-86172-1-git-send-email-yi.l.liu@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Liu Yi L This patch adds VFIO pasid alloc/free support to allow host intercept in PASID allocation for VM by adding VFIO implementation of DualStageIOMMUOps.pasid_alloc/free callbacks. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Cc: Alex Williamson Signed-off-by: Liu Yi L --- hw/vfio/common.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index a07824b..014f4e7 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1179,7 +1179,49 @@ static int vfio_get_iommu_type(VFIOContainer *container, return -EINVAL; } +static int vfio_ds_iommu_pasid_alloc(DualStageIOMMUObject *dsi_obj, + uint32_t min, uint32_t max, uint32_t *pasid) +{ + VFIOContainer *container = container_of(dsi_obj, VFIOContainer, dsi_obj); + struct vfio_iommu_type1_pasid_request req; + unsigned long argsz; + + argsz = sizeof(req); + req.argsz = argsz; + req.flags = VFIO_IOMMU_PASID_ALLOC; + req.alloc_pasid.min = min; + req.alloc_pasid.max = max; + + if (ioctl(container->fd, VFIO_IOMMU_PASID_REQUEST, &req)) { + error_report("%s: %d, alloc failed", __func__, -errno); + return -errno; + } + *pasid = req.alloc_pasid.result; + return 0; +} + +static int vfio_ds_iommu_pasid_free(DualStageIOMMUObject *dsi_obj, + uint32_t pasid) +{ + VFIOContainer *container = container_of(dsi_obj, VFIOContainer, dsi_obj); + struct vfio_iommu_type1_pasid_request req; + unsigned long argsz; + + argsz = sizeof(req); + req.argsz = argsz; + req.flags = VFIO_IOMMU_PASID_FREE; + req.free_pasid = pasid; + + if (ioctl(container->fd, VFIO_IOMMU_PASID_REQUEST, &req)) { + error_report("%s: %d, free failed", __func__, -errno); + return -errno; + } + return 0; +} + static struct DualStageIOMMUOps vfio_ds_iommu_ops = { + .pasid_alloc = vfio_ds_iommu_pasid_alloc, + .pasid_free = vfio_ds_iommu_pasid_free, }; static int vfio_get_iommu_info(VFIOContainer *container,