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a="71304982" X-IronPort-AV: E=Sophos;i="6.21,150,1763452800"; d="scan'208";a="71304982" X-CSE-ConnectionGUID: ++0PnQz/RsWSSKXF9FlIlA== X-CSE-MsgGUID: dULeDp0lTba4PgIHqpqTgg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,150,1763452800"; d="scan'208";a="197408761" 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 v9 06/19] intel_iommu: Implement get_viommu_flags() callback Date: Mon, 15 Dec 2025 01:50:30 -0500 Message-ID: <20251215065046.86991-7-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20251215065046.86991-1-zhenzhong.duan@intel.com> References: <20251215065046.86991-1-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=198.175.65.15; 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: 1765781631619158500 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 64c5c6cbc2..7fc14509ac 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" @@ -4659,6 +4660,16 @@ static void vtd_dev_unset_iommu_device(PCIBus *bus, = void *opaque, int devfn) vtd_iommu_unlock(s); } =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) { @@ -5312,6 +5323,7 @@ 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