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a="35403489" X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="35403489" X-CSE-ConnectionGUID: 4Ed2/OgfSQO2rccMVHR1cg== X-CSE-MsgGUID: Ddb+p4BdQRi0KA4lVOOGbw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="67536401" 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 v3 03/17] intel_iommu: Add a placeholder variable for scalable modern mode Date: Wed, 11 Sep 2024 13:22:41 +0800 Message-Id: <20240911052255.1294071-4-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240911052255.1294071-1-zhenzhong.duan@intel.com> References: <20240911052255.1294071-1-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=192.198.163.11; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -44 X-Spam_score: -4.5 X-Spam_bar: ---- X-Spam_report: (-4.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.145, 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: 1726032438625116600 Content-Type: text/plain; charset="utf-8" Add an new element scalable_mode in IntelIOMMUState to mark scalable modern mode, this element will be exposed as an intel_iommu property finally. For now, it's only a placehholder and used for address width compatibility check and block host device passthrough until nesting is supported. Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan Acked-by: Jason Wang --- include/hw/i386/intel_iommu.h | 1 + hw/i386/intel_iommu.c | 22 ++++++++++++++++++---- 2 files changed, 19 insertions(+), 4 deletions(-) diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index 1eb05c29fc..788ed42477 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -262,6 +262,7 @@ struct IntelIOMMUState { =20 bool caching_mode; /* RO - is cap CM enabled? */ bool scalable_mode; /* RO - is Scalable Mode supported? */ + bool scalable_modern; /* RO - is modern SM supported? */ bool snoop_control; /* RO - is SNP filed supported? */ =20 dma_addr_t root; /* Current root table pointer */ diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index e3465fc27d..57c24f67b4 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -3872,7 +3872,13 @@ static bool vtd_check_hiod(IntelIOMMUState *s, HostI= OMMUDevice *hiod, return false; } =20 - return true; + if (!s->scalable_modern) { + /* All checks requested by VTD non-modern mode pass */ + return true; + } + + error_setg(errp, "host device is unsupported in scalable modern mode y= et"); + return false; } =20 static bool vtd_dev_set_iommu_device(PCIBus *bus, void *opaque, int devfn, @@ -4262,14 +4268,22 @@ static bool vtd_decide_config(IntelIOMMUState *s, E= rror **errp) } } =20 - /* Currently only address widths supported are 39 and 48 bits */ if ((s->aw_bits !=3D VTD_HOST_AW_39BIT) && - (s->aw_bits !=3D VTD_HOST_AW_48BIT)) { - error_setg(errp, "Supported values for aw-bits are: %d, %d", + (s->aw_bits !=3D VTD_HOST_AW_48BIT) && + !s->scalable_modern) { + error_setg(errp, "%s mode: supported values for aw-bits are: %d, %= d", + s->scalable_mode ? "Scalable legacy" : "Legacy", VTD_HOST_AW_39BIT, VTD_HOST_AW_48BIT); return false; } =20 + if ((s->aw_bits !=3D VTD_HOST_AW_48BIT) && s->scalable_modern) { + error_setg(errp, + "Scalable modern mode: supported values for aw-bits is:= %d", + VTD_HOST_AW_48BIT); + return false; + } + if (s->scalable_mode && !s->dma_drain) { error_setg(errp, "Need to set dma_drain for scalable mode"); return false; --=20 2.34.1