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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Mar 2023 14:26:28.1939 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e1f17bc5-39a1-4f32-f53f-08db1fe11afa X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT072.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8574 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759810152235783854?= X-GMAIL-MSGID: =?utf-8?q?1759810152235783854?= A driver that doesn't implement ops->dma_unmap shouldn't be allowed to do vfio_pin/unpin_pages(), though it can use vfio_dma_rw() to access an iova range. Deny !ops->dma_unmap cases in vfio_pin/unpin_pages(). Suggested-by: Kevin Tian Reviewed-by: Kevin Tian Reviewed-by: Yi Liu Signed-off-by: Nicolin Chen Reviewed-by: Jason Gunthorpe --- drivers/vfio/vfio_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c index e5f4738692ac..32ea7cea1236 100644 --- a/drivers/vfio/vfio_main.c +++ b/drivers/vfio/vfio_main.c @@ -1522,6 +1522,8 @@ int vfio_pin_pages(struct vfio_device *device, dma_addr_t iova, /* group->container cannot change while a vfio device is open */ if (!pages || !npage || WARN_ON(!vfio_assert_device_open(device))) return -EINVAL; + if (!device->ops->dma_unmap) + return -EINVAL; if (vfio_device_has_container(device)) return vfio_device_container_pin_pages(device, iova, npage, prot, pages); @@ -1559,6 +1561,8 @@ void vfio_unpin_pages(struct vfio_device *device, dma_addr_t iova, int npage) { if (WARN_ON(!vfio_assert_device_open(device))) return; + if (WARN_ON(!device->ops->dma_unmap)) + return; if (vfio_device_has_container(device)) { vfio_device_container_unpin_pages(device, iova, npage); From patchwork Wed Mar 8 14:25:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 66259 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp368328wrd; Wed, 8 Mar 2023 06:32:37 -0800 (PST) X-Google-Smtp-Source: AK7set8Rll5J+WgGuvpfEiQPdkSdGDMVLtTSo8uQMIvgWEjE6VHEtKoPFna0AXmFDDA57GbZMV3J X-Received: by 2002:a50:ed83:0:b0:4c3:4da1:3df8 with SMTP id h3-20020a50ed83000000b004c34da13df8mr16153861edr.17.1678285957200; Wed, 08 Mar 2023 06:32:37 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1678285957; cv=pass; d=google.com; s=arc-20160816; b=pr0BTbItal5hUHBriqh4lNwz+b1xWSN5LAQdZ1aI5xCCb1CZXeNEf1IJiuxKaowNi2 ZPNVVsnwIgkZuzET9ffhAiWufU1/XKw7wUiH0ho1MB2hH5Wca5kjUjebLqhww57etyQe WWhPWANaVwdCVlD2dAKRmW9EgqWa+x3Xt6McUg+BPA40UexL+66DXReO4bqAgIfB+qr1 wUyQW+jK8AAlBr54u6V6vpuiP2o7Nl6jZ8wt9Zbj3MdLVsiaVu/vKOba1I8DKQEoBjey c08rpQG1Ch89KMrF0BQnh7JMmGYAymsJ9SQF/NkqqrBtZ8yCeJjSTQWpuJqMCLB4tEn3 scZg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=NzbPeHexKIf3PE+bJGFCFDeSpY8S/7mrVS5Vct/ECOE=; b=ycl+jO/eQS4RLxp6AWgFTVZncUiAfoN6a4EUf9vZEC6+yB2BwwWOddxoXUhI6f/PfH 0mCWHJz/Xx64Ec4ftx6gvx51DFIy3QSmC0t0JlRBKCiqsiakDkUCP5Uc26qbnhrlpv3H m3CdBTr3XxHbfm9FO0XPqDhJguxk5aNBNbj+hP79PoPekYCEGBajfQ6OnNS5QX4OzLe3 08gdqmfc4KE6gOwErEMSQRqPG1u5CUeFzntkZnr8ceDJ9/v7NXiVp60vhb33gN1VuiJ8 w1cv1jyV8VF6l8saRrnqu2n/z+7g/oGuEsll0PBR/5iSyNkmJlqsJzKOpKaInA60SIra pULg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b=E2Af0Wqf; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Received: from out1.vger.email (out1.vger.email. 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Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 4 +++ drivers/iommu/iommufd/selftest.c | 26 +++++++++++++++---- tools/testing/selftests/iommu/iommufd_utils.h | 22 ++++++++++++++-- 3 files changed, 45 insertions(+), 7 deletions(-) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index dd9168a20ddf..da1898a9128f 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -18,6 +18,7 @@ enum { IOMMU_TEST_OP_ACCESS_RW, IOMMU_TEST_OP_SET_TEMP_MEMORY_LIMIT, IOMMU_TEST_OP_MOCK_DOMAIN_REPLACE, + IOMMU_TEST_OP_ACCESS_SET_IOAS, }; enum { @@ -91,6 +92,9 @@ struct iommu_test_cmd { struct { __u32 limit; } memory_limit; + struct { + __u32 ioas_id; + } access_set_ioas; }; __u32 last; }; diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 60f21bb3f3d4..d7832ffc3aa6 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -732,7 +732,7 @@ static struct selftest_access *iommufd_test_alloc_access(void) } static int iommufd_test_create_access(struct iommufd_ucmd *ucmd, - unsigned int ioas_id, unsigned int flags) + unsigned int flags) { struct iommu_test_cmd *cmd = ucmd->cmd; struct selftest_access *staccess; @@ -764,9 +764,6 @@ static int iommufd_test_create_access(struct iommufd_ucmd *ucmd, rc = PTR_ERR(access); goto out_put_fdno; } - rc = iommufd_access_set_ioas(access, ioas_id); - if (rc) - goto out_destroy; cmd->create_access.out_access_fd = fdno; rc = iommufd_ucmd_respond(ucmd, sizeof(*cmd)); if (rc) @@ -785,6 +782,22 @@ static int iommufd_test_create_access(struct iommufd_ucmd *ucmd, return rc; } +static int iommufd_test_access_set_ioas(struct iommufd_ucmd *ucmd, + unsigned int access_id, + unsigned int ioas_id) +{ + struct selftest_access *staccess; + int rc; + + staccess = iommufd_access_get(access_id); + if (IS_ERR(staccess)) + return PTR_ERR(staccess); + + rc = iommufd_access_set_ioas(staccess->access, ioas_id); + fput(staccess->file); + return rc; +} + /* Check that the pages in a page array match the pages in the user VA */ static int iommufd_test_check_pages(void __user *uptr, struct page **pages, size_t npages) @@ -998,8 +1011,11 @@ int iommufd_test(struct iommufd_ucmd *ucmd) ucmd, u64_to_user_ptr(cmd->check_refs.uptr), cmd->check_refs.length, cmd->check_refs.refs); case IOMMU_TEST_OP_CREATE_ACCESS: - return iommufd_test_create_access(ucmd, cmd->id, + return iommufd_test_create_access(ucmd, cmd->create_access.flags); + case IOMMU_TEST_OP_ACCESS_SET_IOAS: + return iommufd_test_access_set_ioas( + ucmd, cmd->id, cmd->access_set_ioas.ioas_id); case IOMMU_TEST_OP_ACCESS_PAGES: return iommufd_test_access_pages( ucmd, cmd->id, cmd->access_pages.iova, diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h index 9b6dcb921750..399779acce23 100644 --- a/tools/testing/selftests/iommu/iommufd_utils.h +++ b/tools/testing/selftests/iommu/iommufd_utils.h @@ -117,13 +117,31 @@ static int _test_cmd_hwpt_alloc(int fd, __u32 device_id, __u32 pt_id, #define test_cmd_hwpt_alloc(device_id, pt_id, hwpt_id) \ ASSERT_EQ(0, _test_cmd_hwpt_alloc(self->fd, device_id, pt_id, hwpt_id)) +static int _test_cmd_access_set_ioas(int fd, __u32 access_id, + unsigned int ioas_id) +{ + struct iommu_test_cmd cmd = { + .size = sizeof(cmd), + .op = IOMMU_TEST_OP_ACCESS_SET_IOAS, + .id = access_id, + .access_set_ioas = { .ioas_id = ioas_id }, + }; + int ret; + + ret = ioctl(fd, IOMMU_TEST_CMD, &cmd); + if (ret) + return ret; + return 0; +} +#define test_cmd_access_set_ioas(access_id, ioas_id) \ + ASSERT_EQ(0, _test_cmd_access_set_ioas(self->fd, access_id, ioas_id)) + static int _test_cmd_create_access(int fd, unsigned int ioas_id, __u32 *access_id, unsigned int flags) { struct iommu_test_cmd cmd = { .size = sizeof(cmd), .op = IOMMU_TEST_OP_CREATE_ACCESS, - .id = ioas_id, .create_access = { .flags = flags }, }; int ret; @@ -132,7 +150,7 @@ static int _test_cmd_create_access(int fd, unsigned int ioas_id, if (ret) return ret; *access_id = cmd.create_access.out_access_fd; - return 0; + return _test_cmd_access_set_ioas(fd, *access_id, ioas_id); } #define test_cmd_create_access(ioas_id, access_id, flags) \ ASSERT_EQ(0, _test_cmd_create_access(self->fd, ioas_id, access_id, \ From patchwork Wed Mar 8 14:26:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 66265 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp373774wrd; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Mar 2023 14:26:31.1633 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fe2b4725-ebe6-415f-0fad-08db1fe11cc0 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT108.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7891 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759810986857924078?= X-GMAIL-MSGID: =?utf-8?q?1759810986857924078?= Support an access->ioas replacement in iommufd_access_set_ioas(), which sets the access->ioas to NULL provisionally so that any further incoming iommufd_access_pin_pages() callback can be blocked. Then, call access->ops->unmap() to clean up the entire iopt. To allow an iommufd_access_unpin_pages() callback to happen via this unmap() call, add an ioas_unpin pointer so the unpin routine won't be affected by the "access->ioas = NULL" trick above. Suggested-by: Jason Gunthorpe Signed-off-by: Nicolin Chen Reviewed-by: Kevin Tian --- drivers/iommu/iommufd/device.c | 17 +++++++++++++++-- drivers/iommu/iommufd/iommufd_private.h | 1 + 2 files changed, 16 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index 612a5f424bd7..c10e02f6a0be 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -727,11 +727,24 @@ int iommufd_access_set_ioas(struct iommufd_access *access, u32 ioas_id) iommufd_ref_to_users(obj); } + /* + * Set ioas to NULL to block any further iommufd_access_pin_pages(). + * iommufd_access_unpin_pages() can continue using access->ioas_unpin. + */ + access->ioas = NULL; + + if (access->ops->unmap) { + mutex_unlock(&access->ioas_lock); + access->ops->unmap(access->data, 0, ULONG_MAX); + mutex_lock(&access->ioas_lock); + } + if (cur_ioas) { iopt_remove_access(&cur_ioas->iopt, access); refcount_dec(&cur_ioas->obj.users); } + access->ioas_unpin = new_ioas; access->ioas = new_ioas; mutex_unlock(&access->ioas_lock); @@ -805,11 +818,11 @@ void iommufd_access_unpin_pages(struct iommufd_access *access, return; mutex_lock(&access->ioas_lock); - if (!access->ioas) { + if (!access->ioas_unpin) { mutex_unlock(&access->ioas_lock); return; } - iopt = &access->ioas->iopt; + iopt = &access->ioas_unpin->iopt; down_read(&iopt->iova_rwsem); iopt_for_each_contig_area(&iter, area, iopt, iova, last_iova) diff --git a/drivers/iommu/iommufd/iommufd_private.h b/drivers/iommu/iommufd/iommufd_private.h index db1ead8ff9d0..b18f843ad6a4 100644 --- a/drivers/iommu/iommufd/iommufd_private.h +++ b/drivers/iommu/iommufd/iommufd_private.h @@ -312,6 +312,7 @@ struct iommufd_access { struct iommufd_object obj; struct iommufd_ctx *ictx; struct iommufd_ioas *ioas; + struct iommufd_ioas *ioas_unpin; struct mutex ioas_lock; const struct iommufd_access_ops *ops; void *data; From patchwork Wed Mar 8 14:26:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 66266 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp373976wrd; Wed, 8 Mar 2023 06:42:45 -0800 (PST) X-Google-Smtp-Source: AK7set+ThDQj/4J2rvKR3jSdVRwmIGKgM8lBDXI9CEBqhptS3UyfiaBmjmaOyNsYFcnzE7y8o2oH X-Received: by 2002:a17:90b:350c:b0:234:2776:a357 with SMTP id ls12-20020a17090b350c00b002342776a357mr18775911pjb.43.1678286565341; Wed, 08 Mar 2023 06:42:45 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1678286565; cv=pass; d=google.com; s=arc-20160816; b=N9TxomLNSrW3J8TPepPlB30OqjM+gbp6m6MDFjWki0HKctbbc/dChym3qLiT0NKqAM WNhdVFhg/s3Kn56xfRovtxwas5GkH8cP69Ob54bZ/Wc+fJB0gloe1yHm9CB2k72Jme+D VZO/gwvQ4XXkwgdXoMZCBcGjMu8PAxzQD6TDcXL6Qz/Z2g+c03deJ0icKuINLw7uNmA0 q3Lxk0RJ+pBl+HSuKS9zjXFOoPOy2UE821sELpIQiImpCuFLABxgGuBzSvO2pQ7FL/2f l+jO3xTBa0A3YPtnks4eBUyQmKolGxqpKaNY1rzg/CEvHKkKZ2uInT6WpBYiPeNq610f uJdA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=GBpMSN1XdXWnRLypdOscjNZjW9V51VxbSHPDW1MqkvM=; b=J2Xt+lfVxm0hKen7agLOyhgfVQHdDpNBUS/bAtBucbEicmwQf5pOz8uL6/KwN6ahee tLKe/6VXlF+vTpaKID/LpPktBQOvX9TTTImdq/KtFTE3GAOPrrY5LVxy6P2FzHOSrpkI FuVP8VB4pmS7xET852SF5x9mhsN2mhLdnbnnZjDp9ZX64ysUiuMK7+otfVc4f/Kophho 4Nuy7Z1MWLrl+X5ALelbxr0CZGxPrj+OxL6GCWcin4doFGQDY8ZL3MkaDRlFFpSWbrUQ dW4689yACVMOWzX56ePXLXIR9eYXFEAav2dcw0DSdaqK4kB/lbxS1H9wtKO6PPXhg4Bo CQSw== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b=P8+DDQSi; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Received: from out1.vger.email (out1.vger.email. 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It basically repeats the copy test after replacing the old ioas with a new one. Reviewed-by: Kevin Tian Signed-off-by: Nicolin Chen --- tools/testing/selftests/iommu/iommufd.c | 29 +++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c index c07252dbf62d..5c33b6b52c65 100644 --- a/tools/testing/selftests/iommu/iommufd.c +++ b/tools/testing/selftests/iommu/iommufd.c @@ -1252,7 +1252,13 @@ TEST_F(iommufd_mock_domain, user_copy) .dst_iova = MOCK_APERTURE_START, .length = BUFFER_SIZE, }; - unsigned int ioas_id; + struct iommu_ioas_unmap unmap_cmd = { + .size = sizeof(unmap_cmd), + .ioas_id = self->ioas_id, + .iova = MOCK_APERTURE_START, + .length = BUFFER_SIZE, + }; + unsigned int new_ioas_id, ioas_id; /* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */ test_ioctl_ioas_alloc(&ioas_id); @@ -1270,11 +1276,30 @@ TEST_F(iommufd_mock_domain, user_copy) ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); + /* Now replace the ioas with a new one */ + test_ioctl_ioas_alloc(&new_ioas_id); + test_ioctl_ioas_map_id(new_ioas_id, buffer, BUFFER_SIZE, + ©_cmd.src_iova); + test_cmd_access_set_ioas(access_cmd.id, new_ioas_id); + + /* Destroy the old ioas and cleanup copied mapping */ + ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_UNMAP, &unmap_cmd)); + test_ioctl_destroy(ioas_id); + + /* Then run the same test again with the new ioas */ + access_cmd.access_pages.iova = copy_cmd.src_iova; + ASSERT_EQ(0, + ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES), + &access_cmd)); + copy_cmd.src_ioas_id = new_ioas_id; + ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd)); + check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); + test_cmd_destroy_access_pages( access_cmd.id, access_cmd.access_pages.out_access_pages_id); test_cmd_destroy_access(access_cmd.id); - test_ioctl_destroy(ioas_id); + test_ioctl_destroy(new_ioas_id); } TEST_F(iommufd_mock_domain, replace) From patchwork Wed Mar 8 14:26:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolin Chen X-Patchwork-Id: 66267 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a5d:5915:0:0:0:0:0 with SMTP id v21csp374415wrd; Wed, 8 Mar 2023 06:43:39 -0800 (PST) X-Google-Smtp-Source: AK7set8WI3DSsrVh60wkgshF7t+tOmwFZIbEewQXvhBMa6u5soXRBqQov+g2ahq/O1ftmRDQ3C1a X-Received: by 2002:a17:902:aa02:b0:19a:839d:b682 with SMTP id be2-20020a170902aa0200b0019a839db682mr16931613plb.17.1678286618779; Wed, 08 Mar 2023 06:43:38 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1678286618; cv=pass; d=google.com; s=arc-20160816; b=iRzRUjH9cPFTkk2N+aLbaRPcDX6lVBDFMj9L1iga//EgXia0uJjSf5dt5jfA21BkdI E52cktNlM7mcdxcQnry4mA+WU7pVQa4+ZXxlp2sg0HxvHnx4bqnCd+/hNIT684FIMzIp 2GNu9Vc8grDx2DCRfySCI4Zd92tgJnWy6SRWqdpcogJ2g8UN/mtxMGTeEADKPKPgUmxB bGifCVwyc5GNPFG8l8oR+WSlvsGIzz0gYMuC7CJYpaCA9hzO3n5nSPSRVn3ZeraBGtyw eczGxclkxKnedQ+vUDgWbKf4AfCJno5aptukrNjmyu4RIUQOfiuc+W+6vMO1vAytWqz8 WQ0A== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=lEHEiva0AInWLMPGMorLpy6fr1b2GpNjaBysPbPcCOw=; b=bHmfEqAcKuK/GEpGdHCnIITZsgebf/xeuiIurvAh2CMpTVgXus0G2gsM06UNpyKr+Q 5cxvoLs5xnBQxEv4APzpct/n6P8tqALKOjLu0v1IAcCuNzRtKQ85jn18oPUeFRfEE2j/ cH/Lyr2+p8FT2A+VslrVuYEG25BnydfK5OU7Dp5jxpnyUGW1wrAO/C+Q8qK/og8jbQca E9EinV+co0gKz9mVcxYh/dW6Iq+zIN4fngFxYwYGpUfXPYSz4NOQn1uCJxCth30BO01f c7o/vDUqtO6o+RcmsdIPbha+HQJ7uweQ2MzrP4cK27GrE8Ir2GcVZBTGYfnx3mley0qP 2zCA== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@Nvidia.com header.s=selector2 header.b=DIvSE+xL; arc=pass (i=1 spf=pass spfdomain=nvidia.com dmarc=pass fromdomain=nvidia.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=nvidia.com Received: from out1.vger.email (out1.vger.email. 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Mar 2023 14:26:36.2584 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7324f2f7-7edc-407e-802e-08db1fe11fc9 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT060.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7611 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1759811069529934547?= X-GMAIL-MSGID: =?utf-8?q?1759811069529934547?= Now both the physical path and the emulated path should support an IO page table replacement. Call iommufd_device_replace() when vdev->iommufd_attached is true. Also update the VFIO_DEVICE_ATTACH_IOMMUFD_PT kdoc in the uAPI header. Signed-off-by: Nicolin Chen --- drivers/vfio/iommufd.c | 6 +++--- include/uapi/linux/vfio.h | 6 ++++++ 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/vfio/iommufd.c b/drivers/vfio/iommufd.c index 8a9457d0a33c..a245a8e0c8ab 100644 --- a/drivers/vfio/iommufd.c +++ b/drivers/vfio/iommufd.c @@ -145,9 +145,9 @@ int vfio_iommufd_physical_attach_ioas(struct vfio_device *vdev, u32 *pt_id) return -EINVAL; if (vdev->iommufd_attached) - return -EBUSY; - - rc = iommufd_device_attach(vdev->iommufd_device, pt_id); + rc = iommufd_device_replace(vdev->iommufd_device, pt_id); + else + rc = iommufd_device_attach(vdev->iommufd_device, pt_id); if (rc) return rc; vdev->iommufd_attached = true; diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 692156a708bb..14375826a25b 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -243,6 +243,12 @@ struct vfio_device_bind_iommufd { * * Undo by VFIO_DEVICE_DETACH_IOMMUFD_PT or device fd close. * + * If a vfio device is currently attached to a valid hw_pagetable, without doing + * a VFIO_DEVICE_DETACH_IOMMUFD_PT, a second VFIO_DEVICE_ATTACH_IOMMUFD_PT ioctl + * passing in another hw_pagetable (hwpt) id is allowed. This action, also known + * as a hw_pagetable replacement, will replace the device's currently attached + * hw_pagetable with a new hw_pagetable corresponding to the given pt_id. + * * @argsz: user filled size of this data. * @flags: must be 0. * @pt_id: Input the target id which can represent an ioas or a hwpt