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a="25575303" X-IronPort-AV: E=Sophos;i="6.08,216,1712646000"; d="scan'208";a="25575303" X-CSE-ConnectionGUID: ZQOj+GMRT/SGDhZ1p7W9GQ== X-CSE-MsgGUID: bt9Aq452SnKosXjSZJoKwQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,216,1712646000"; d="scan'208";a="37954757" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, peterx@redhat.com, jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan Subject: [PATCH v7 02/17] backends/host_iommu_device: Introduce HostIOMMUDeviceCaps Date: Wed, 5 Jun 2024 16:30:28 +0800 Message-Id: <20240605083043.317831-3-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240605083043.317831-1-zhenzhong.duan@intel.com> References: <20240605083043.317831-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.12; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1717576457230100001 HostIOMMUDeviceCaps's elements map to the host IOMMU's capabilities. Different platform IOMMU can support different elements. Currently only two elements, type and aw_bits, type hints the host platform IOMMU type, i.e., INTEL vtd, ARM smmu, etc; aw_bits hints host IOMMU address width. Introduce .get_cap() handler to check if HOST_IOMMU_DEVICE_CAP_XXX is supported. Suggested-by: C=C3=A9dric Le Goater Signed-off-by: Zhenzhong Duan --- include/sysemu/host_iommu_device.h | 38 ++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu= _device.h index db47a16189..a57873958b 100644 --- a/include/sysemu/host_iommu_device.h +++ b/include/sysemu/host_iommu_device.h @@ -15,6 +15,18 @@ #include "qom/object.h" #include "qapi/error.h" =20 +/** + * struct HostIOMMUDeviceCaps - Define host IOMMU device capabilities. + * + * @type: host platform IOMMU type. + * + * @aw_bits: host IOMMU address width. 0xff if no limitation. + */ +typedef struct HostIOMMUDeviceCaps { + uint32_t type; + uint8_t aw_bits; +} HostIOMMUDeviceCaps; + #define TYPE_HOST_IOMMU_DEVICE "host-iommu-device" OBJECT_DECLARE_TYPE(HostIOMMUDevice, HostIOMMUDeviceClass, HOST_IOMMU_DEVI= CE) =20 @@ -22,6 +34,7 @@ struct HostIOMMUDevice { Object parent_obj; =20 char *name; + HostIOMMUDeviceCaps caps; }; =20 /** @@ -49,5 +62,30 @@ struct HostIOMMUDeviceClass { * Returns: true on success, false on failure. */ bool (*realize)(HostIOMMUDevice *hiod, void *opaque, Error **errp); + /** + * @get_cap: check if a host IOMMU device capability is supported. + * + * Optional callback, if not implemented, hint not supporting query + * of @cap. + * + * @hiod: pointer to a host IOMMU device instance. + * + * @cap: capability to check. + * + * @errp: pass an Error out when fails to query capability. + * + * Returns: <0 on failure, 0 if a @cap is unsupported, or else + * 1 or some positive value for some special @cap, + * i.e., HOST_IOMMU_DEVICE_CAP_AW_BITS. + */ + int (*get_cap)(HostIOMMUDevice *hiod, int cap, Error **errp); }; + +/* + * Host IOMMU device capability list. + */ +#define HOST_IOMMU_DEVICE_CAP_IOMMU_TYPE 0 +#define HOST_IOMMU_DEVICE_CAP_AW_BITS 1 + +#define HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX 64 #endif --=20 2.34.1