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a="76045929" X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="76045929" X-CSE-ConnectionGUID: /VJjrsnuSkiuZwVLdGPYSg== X-CSE-MsgGUID: ZMkKwW4vSpu9Mn6XB9UoSg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,311,1754982000"; d="scan'208";a="190070893" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex@shazbot.org, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, jasowang@redhat.com, peterx@redhat.com, ddutile@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, skolothumtho@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 v8 06/23] intel_iommu: Implement get_viommu_flags() callback Date: Mon, 17 Nov 2025 04:37:09 -0500 Message-ID: <20251117093729.1121324-7-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20251117093729.1121324-1-zhenzhong.duan@intel.com> References: <20251117093729.1121324-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 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=192.198.163.9; 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, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: 1763372513638158500 Content-Type: text/plain; charset="utf-8" Implement get_viommu_flags() callback and expose a request for nesting parent HWPT for now. VFIO uses it to create nesting parent HWPT which is further used to create nested HWPT in vIOMMU. All these will be implemented in following patches. Suggested-by: Yi Liu Signed-off-by: Zhenzhong Duan Reviewed-by: Eric Auger Reviewed-by: Nicolin Chen Reviewed-by: Yi Liu --- hw/i386/intel_iommu.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index ab8037a666..43f3a49769 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -24,6 +24,7 @@ #include "qemu/main-loop.h" #include "qapi/error.h" #include "hw/sysbus.h" +#include "hw/iommu.h" #include "intel_iommu_internal.h" #include "hw/pci/pci.h" #include "hw/pci/pci_bus.h" @@ -4696,6 +4697,16 @@ static void vtd_address_space_unmap_in_migration(VTD= AddressSpace *as, } } =20 +static uint64_t vtd_get_viommu_flags(void *opaque) +{ + IntelIOMMUState *s =3D opaque; + uint64_t flags; + + flags =3D s->fsts ? VIOMMU_FLAG_WANT_NESTING_PARENT : 0; + + return flags; +} + /* Unmap the whole range in the notifier's scope. */ static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n) { @@ -5354,6 +5365,7 @@ static PCIIOMMUOps vtd_iommu_ops =3D { .pri_register_notifier =3D vtd_pri_register_notifier, .pri_unregister_notifier =3D vtd_pri_unregister_notifier, .pri_request_page =3D vtd_pri_request_page, + .get_viommu_flags =3D vtd_get_viommu_flags, }; =20 static bool vtd_decide_config(IntelIOMMUState *s, Error **errp) --=20 2.47.1