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Berrange" , Eduardo Habkost , Eric Blake , Markus Armbruster , Jason Gunthorpe , Avihai Horon , Joao Martins Subject: [PATCH RFCv2 1/8] backends/iommufd: Introduce helper function iommufd_device_get_hw_capabilities() Date: Mon, 12 Feb 2024 13:56:36 +0000 Message-Id: <20240212135643.5858-2-joao.m.martins@oracle.com> In-Reply-To: <20240212135643.5858-1-joao.m.martins@oracle.com> References: <20240212135643.5858-1-joao.m.martins@oracle.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-12_10,2024-02-12_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 bulkscore=0 mlxlogscore=698 malwarescore=0 mlxscore=0 spamscore=0 suspectscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402120105 X-Proofpoint-GUID: fOwN1-OCnkvPzw8JFyjK-UAepyoR-rAy X-Proofpoint-ORIG-GUID: fOwN1-OCnkvPzw8JFyjK-UAepyoR-rAy Received-SPF: pass client-ip=205.220.177.32; envelope-from=joao.m.martins@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The new helper will fetch vendor agnostic IOMMU capabilities supported both by hardware and software. Right now it is only iommu dirty tracking. Signed-off-by: Joao Martins --- backends/iommufd.c | 25 +++++++++++++++++++++++++ include/sysemu/iommufd.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/backends/iommufd.c b/backends/iommufd.c index d92791bba935..8486894f1b3f 100644 --- a/backends/iommufd.c +++ b/backends/iommufd.c @@ -237,3 +237,28 @@ void iommufd_device_init(IOMMUFDDevice *idev) host_iommu_base_device_init(&idev->base, HID_IOMMUFD, sizeof(IOMMUFDDevice)); } + +int iommufd_device_get_hw_capabilities(IOMMUFDDevice *idev, uint64_t *caps, + Error **errp) +{ + struct iommu_hw_info info = { + .size = sizeof(info), + .flags = 0, + .dev_id = idev->devid, + .data_len = 0, + .__reserved = 0, + .data_uptr = 0, + .out_capabilities = 0, + }; + int ret; + + ret = ioctl(idev->iommufd->fd, IOMMU_GET_HW_INFO, &info); + if (ret) { + error_setg_errno(errp, errno, + "Failed to get hardware info capabilities"); + } else { + *caps = info.out_capabilities; + } + + return ret; +} diff --git a/include/sysemu/iommufd.h b/include/sysemu/iommufd.h index c3f346976039..4afe97307dbe 100644 --- a/include/sysemu/iommufd.h +++ b/include/sysemu/iommufd.h @@ -47,4 +47,6 @@ typedef struct IOMMUFDDevice { } IOMMUFDDevice; void iommufd_device_init(IOMMUFDDevice *idev); +int iommufd_device_get_hw_capabilities(IOMMUFDDevice *idev, uint64_t *caps, + Error **errp); #endif