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[72.137.123.47]) by smtp.gmail.com with ESMTPSA id n11sm9367892wrg.72.2020.04.02.11.09.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Apr 2020 11:09:25 -0700 (PDT) Date: Thu, 2 Apr 2020 14:09:20 -0400 From: Peter Xu To: Liu Yi L Cc: qemu-devel@nongnu.org, alex.williamson@redhat.com, eric.auger@redhat.com, pbonzini@redhat.com, mst@redhat.com, david@gibson.dropbear.id.au, kevin.tian@intel.com, jun.j.tian@intel.com, yi.y.sun@intel.com, kvm@vger.kernel.org, hao.wu@intel.com, jean-philippe@linaro.org, Jacob Pan , Yi Sun , Richard Henderson Subject: Re: [PATCH v2 15/22] intel_iommu: bind/unbind guest page table to host Message-ID: <20200402180920.GD103677@xz-x1> References: <1585542301-84087-1-git-send-email-yi.l.liu@intel.com> <1585542301-84087-16-git-send-email-yi.l.liu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1585542301-84087-16-git-send-email-yi.l.liu@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Sun, Mar 29, 2020 at 09:24:54PM -0700, Liu Yi L wrote: > +static int vtd_bind_guest_pasid(IntelIOMMUState *s, VTDBus *vtd_bus, > + int devfn, int pasid, VTDPASIDEntry *pe, > + VTDPASIDOp op) > +{ > + VTDHostIOMMUContext *vtd_dev_icx; > + HostIOMMUContext *iommu_ctx; > + DualIOMMUStage1BindData *bind_data; > + struct iommu_gpasid_bind_data *g_bind_data; > + int ret = -1; > + > + vtd_dev_icx = vtd_bus->dev_icx[devfn]; > + if (!vtd_dev_icx) { > + /* means no need to go further, e.g. for emulated devices */ > + return 0; > + } > + > + iommu_ctx = vtd_dev_icx->iommu_ctx; > + if (!iommu_ctx) { > + return -EINVAL; > + } > + > + if (!(iommu_ctx->stage1_formats > + & IOMMU_PASID_FORMAT_INTEL_VTD)) { > + error_report_once("IOMMU Stage 1 format is not compatible!\n"); > + return -EINVAL; > + } > + > + bind_data = g_malloc0(sizeof(*bind_data)); > + bind_data->pasid = pasid; > + g_bind_data = &bind_data->bind_data.gpasid_bind; > + > + g_bind_data->flags = 0; > + g_bind_data->vtd.flags = 0; > + switch (op) { > + case VTD_PASID_BIND: > + g_bind_data->version = IOMMU_UAPI_VERSION; > + g_bind_data->format = IOMMU_PASID_FORMAT_INTEL_VTD; > + g_bind_data->gpgd = vtd_pe_get_flpt_base(pe); > + g_bind_data->addr_width = vtd_pe_get_fl_aw(pe); > + g_bind_data->hpasid = pasid; > + g_bind_data->gpasid = pasid; > + g_bind_data->flags |= IOMMU_SVA_GPASID_VAL; > + g_bind_data->vtd.flags = > + (VTD_SM_PASID_ENTRY_SRE_BIT(pe->val[2]) ? 1 : 0) This evaluates to 1 if VTD_SM_PASID_ENTRY_SRE_BIT(pe->val[2]), or 0. Do you want to use IOMMU_SVA_VTD_GPASID_SRE instead of 1? Same question to all the rest. > + | (VTD_SM_PASID_ENTRY_EAFE_BIT(pe->val[2]) ? 1 : 0) > + | (VTD_SM_PASID_ENTRY_PCD_BIT(pe->val[1]) ? 1 : 0) > + | (VTD_SM_PASID_ENTRY_PWT_BIT(pe->val[1]) ? 1 : 0) > + | (VTD_SM_PASID_ENTRY_EMTE_BIT(pe->val[1]) ? 1 : 0) > + | (VTD_SM_PASID_ENTRY_CD_BIT(pe->val[1]) ? 1 : 0); > + g_bind_data->vtd.pat = VTD_SM_PASID_ENTRY_PAT(pe->val[1]); > + g_bind_data->vtd.emt = VTD_SM_PASID_ENTRY_EMT(pe->val[1]); > + ret = host_iommu_ctx_bind_stage1_pgtbl(iommu_ctx, bind_data); > + break; > + case VTD_PASID_UNBIND: > + g_bind_data->version = IOMMU_UAPI_VERSION; > + g_bind_data->format = IOMMU_PASID_FORMAT_INTEL_VTD; > + g_bind_data->gpgd = 0; > + g_bind_data->addr_width = 0; > + g_bind_data->hpasid = pasid; > + g_bind_data->gpasid = pasid; > + g_bind_data->flags |= IOMMU_SVA_GPASID_VAL; > + ret = host_iommu_ctx_unbind_stage1_pgtbl(iommu_ctx, bind_data); > + break; > + default: > + error_report_once("Unknown VTDPASIDOp!!!\n"); > + break; > + } > + > + g_free(bind_data); > + > + return ret; > +} -- Peter Xu