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a="11161138" X-IronPort-AV: E=Sophos;i="6.08,144,1712646000"; d="scan'208";a="11161138" X-CSE-ConnectionGUID: pVLPV03DT3ObTmfDQA6aUw== X-CSE-MsgGUID: Dhg9q+PtRSuMz670DFobpg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,144,1712646000"; d="scan'208";a="29226732" 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 , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , Eduardo Habkost Subject: [PATCH v5 19/19] intel_iommu: Check compatibility with host IOMMU capabilities Date: Wed, 8 May 2024 17:03:54 +0800 Message-Id: <20240508090354.1815561-20-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240508090354.1815561-1-zhenzhong.duan@intel.com> References: <20240508090354.1815561-1-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=198.175.65.18; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -49 X-Spam_score: -5.0 X-Spam_bar: ----- X-Spam_report: (-5.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.581, 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 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: 1715159370618100001 Content-Type: text/plain; charset="utf-8" If check fails, host device (either VFIO or VDPA device) is not compatible with current vIOMMU config and should not be passed to guest. Only aw_bits is checked for now, we don't care other capabilities before scalable modern mode is introduced. Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan --- hw/i386/intel_iommu.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 747c988bc4..07bfd4f99e 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -20,6 +20,7 @@ */ =20 #include "qemu/osdep.h" +#include CONFIG_DEVICES /* CONFIG_HOST_IOMMU_DEVICE */ #include "qemu/error-report.h" #include "qemu/main-loop.h" #include "qapi/error.h" @@ -3819,6 +3820,26 @@ VTDAddressSpace *vtd_find_add_as(IntelIOMMUState *s,= PCIBus *bus, return vtd_dev_as; } =20 +static bool vtd_check_hdev(IntelIOMMUState *s, VTDHostIOMMUDevice *vtd_hde= v, + Error **errp) +{ +#ifdef CONFIG_HOST_IOMMU_DEVICE + HostIOMMUDevice *hiod =3D vtd_hdev->dev; + int ret; + + /* Common checks */ + ret =3D host_iommu_device_get_cap(hiod, HOST_IOMMU_DEVICE_CAP_AW_BITS,= errp); + if (ret < 0) { + return false; + } + if (s->aw_bits > ret) { + error_setg(errp, "aw-bits %d > host aw-bits %d", s->aw_bits, ret); + return false; + } +#endif + return true; +} + static bool vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, HostIOMMUDevice *hiod, Error **errp) { @@ -3848,6 +3869,12 @@ static bool vtd_dev_set_iommu_device(PCIBus *bus, vo= id *opaque, int devfn, vtd_hdev->iommu_state =3D s; vtd_hdev->dev =3D hiod; =20 + if (!vtd_check_hdev(s, vtd_hdev, errp)) { + g_free(vtd_hdev); + vtd_iommu_unlock(s); + return false; + } + new_key =3D g_malloc(sizeof(*new_key)); new_key->bus =3D bus; new_key->devfn =3D devfn; --=20 2.34.1