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Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , CLEMENT MATHIEU--DRIF , Jason Wang , Yi Liu , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum Subject: [PULL 38/97] intel_iommu: Add support for ATS Message-ID: <47c3dcd3ffc6d187b97fe494a14fb61dd3911ccd.1752534227.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: CLEMENT MATHIEU--DRIF Signed-off-by: Clement Mathieu--Drif Message-Id: <20250628180226.133285-11-clement.mathieu--drif@eviden.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/intel_iommu.c | 63 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 1b1b0b5632..fe9a5f2872 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -4738,6 +4738,68 @@ static AddressSpace *vtd_host_dma_iommu(PCIBus *bus, void *opaque, int devfn) return &vtd_as->as; } +static IOMMUTLBEntry vtd_iommu_ats_do_translate(IOMMUMemoryRegion *iommu, + hwaddr addr, + IOMMUAccessFlags flags) +{ + IOMMUTLBEntry entry; + VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu); + + if (vtd_is_interrupt_addr(addr)) { + vtd_report_ir_illegal_access(vtd_as, addr, flags & IOMMU_WO); + entry.target_as = &address_space_memory; + entry.iova = 0; + entry.translated_addr = 0; + entry.addr_mask = ~VTD_PAGE_MASK_4K; + entry.perm = IOMMU_NONE; + entry.pasid = PCI_NO_PASID; + } else { + entry = vtd_iommu_translate(iommu, addr, flags, 0); + } + + return entry; +} + +static ssize_t vtd_ats_request_translation(PCIBus *bus, void *opaque, + int devfn, uint32_t pasid, + bool priv_req, bool exec_req, + hwaddr addr, size_t length, + bool no_write, IOMMUTLBEntry *result, + size_t result_length, + uint32_t *err_count) +{ + IntelIOMMUState *s = opaque; + VTDAddressSpace *vtd_as; + IOMMUAccessFlags flags = IOMMU_ACCESS_FLAG_FULL(true, !no_write, exec_req, + priv_req, false, false); + ssize_t res_index = 0; + hwaddr target_address = addr + length; + IOMMUTLBEntry entry; + + vtd_as = vtd_find_add_as(s, bus, devfn, pasid); + *err_count = 0; + + while ((addr < target_address) && (res_index < result_length)) { + entry = vtd_iommu_ats_do_translate(&vtd_as->iommu, addr, flags); + entry.perm &= ~IOMMU_GLOBAL; /* Spec 4.1.2: Global Mapping never set */ + + if ((entry.perm & flags) != flags) { + *err_count += 1; /* Less than expected */ + } + + result[res_index] = entry; + res_index += 1; + addr = (addr & (~entry.addr_mask)) + (entry.addr_mask + 1); + } + + /* Buffer too small */ + if (addr < target_address) { + return -ENOMEM; + } + + return res_index; +} + static void vtd_init_iotlb_notifier(PCIBus *bus, void *opaque, int devfn, IOMMUNotifier *n, IOMMUNotify fn, void *user_opaque) @@ -4787,6 +4849,7 @@ static PCIIOMMUOps vtd_iommu_ops = { .init_iotlb_notifier = vtd_init_iotlb_notifier, .register_iotlb_notifier = vtd_register_iotlb_notifier, .unregister_iotlb_notifier = vtd_unregister_iotlb_notifier, + .ats_request_translation = vtd_ats_request_translation, }; static bool vtd_decide_config(IntelIOMMUState *s, Error **errp) -- MST