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envelope-from=clement.mathieu--drif@eviden.com; helo=smarthost3.eviden.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org IOMMU have to implement iommu_ats_request_translation to support ATS. Devices can use IOMMU_TLB_ENTRY_TRANSLATION_ERROR to check the tlb entries returned by a translation request. Signed-off-by: Clément Mathieu--Drif --- include/exec/memory.h | 26 ++++++++++++++++++++++++++ system/memory.c | 20 ++++++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/include/exec/memory.h b/include/exec/memory.h index 198b71e9af..98b02b942c 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -148,6 +148,10 @@ struct IOMMUTLBEntry { uint32_t pasid; }; +/* Check if an IOMMU TLB entry indicates a translation error */ +#define IOMMU_TLB_ENTRY_TRANSLATION_ERROR(entry) ((((entry)->perm) & IOMMU_RW) \ + == IOMMU_NONE) + /* * Bitmap for different IOMMUNotifier capabilities. Each notifier can * register with one or multiple IOMMU Notifier capability bit(s). @@ -567,6 +571,20 @@ struct IOMMUMemoryRegionClass { int (*iommu_set_iova_ranges)(IOMMUMemoryRegion *iommu, GList *iova_ranges, Error **errp); + + /** + * @iommu_ats_request_translation: + * This method must be implemented if the IOMMU has ATS enabled + * + * @see pci_ats_request_translation_pasid + */ + ssize_t (*iommu_ats_request_translation)(IOMMUMemoryRegion *iommu, + bool priv_req, bool exec_req, + hwaddr addr, size_t length, + bool no_write, + IOMMUTLBEntry *result, + size_t result_length, + uint32_t *err_count); }; typedef struct RamDiscardListener RamDiscardListener; @@ -1870,6 +1888,14 @@ void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n); void memory_region_unregister_iommu_notifier(MemoryRegion *mr, IOMMUNotifier *n); +ssize_t memory_region_iommu_ats_request_translation(IOMMUMemoryRegion *iommu_mr, + bool priv_req, bool exec_req, + hwaddr addr, size_t length, + bool no_write, + IOMMUTLBEntry *result, + size_t result_length, + uint32_t *err_count); + /** * memory_region_iommu_get_attr: return an IOMMU attr if get_attr() is * defined on the IOMMU. diff --git a/system/memory.c b/system/memory.c index a229a79988..9c9418c5ee 100644 --- a/system/memory.c +++ b/system/memory.c @@ -2000,6 +2000,26 @@ void memory_region_unregister_iommu_notifier(MemoryRegion *mr, memory_region_update_iommu_notify_flags(iommu_mr, NULL); } +ssize_t memory_region_iommu_ats_request_translation(IOMMUMemoryRegion *iommu_mr, + bool priv_req, + bool exec_req, + hwaddr addr, size_t length, + bool no_write, + IOMMUTLBEntry *result, + size_t result_length, + uint32_t *err_count) +{ + IOMMUMemoryRegionClass *imrc = memory_region_get_iommu_class_nocheck(iommu_mr); + + if (!imrc->iommu_ats_request_translation) { + return -ENODEV; + } + + return imrc->iommu_ats_request_translation(iommu_mr, priv_req, exec_req, + addr, length, no_write, result, + result_length, err_count); +} + void memory_region_notify_iommu_one(IOMMUNotifier *notifier, IOMMUTLBEvent *event) {