@@ -566,6 +566,65 @@ int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
g_assert_not_reached();
}
+SMMUTLBEntry *smmu_translate(SMMUState *bs, SMMUTransCfg *cfg, dma_addr_t addr,
+ IOMMUAccessFlags flag, SMMUPTWEventInfo *info)
+{
+ uint64_t page_mask, aligned_addr;
+ SMMUTLBEntry *cached_entry = NULL;
+ SMMUTransTableInfo *tt;
+ int status;
+
+ /*
+ * Combined attributes used for TLB lookup, as only one stage is supported,
+ * it will hold attributes based on the enabled stage.
+ */
+ SMMUTransTableInfo tt_combined;
+
+ if (cfg->stage == SMMU_STAGE_1) {
+ /* Select stage1 translation table. */
+ tt = select_tt(cfg, addr);
+ if (!tt) {
+ info->type = SMMU_PTW_ERR_TRANSLATION;
+ info->stage = SMMU_STAGE_1;
+ return NULL;
+ }
+ tt_combined.granule_sz = tt->granule_sz;
+ tt_combined.tsz = tt->tsz;
+
+ } else {
+ /* Stage2. */
+ tt_combined.granule_sz = cfg->s2cfg.granule_sz;
+ tt_combined.tsz = cfg->s2cfg.tsz;
+ }
+
+ /*
+ * TLB lookup looks for granule and input size for a translation stage,
+ * as only one stage is supported right now, choose the right values
+ * from the configuration.
+ */
+ page_mask = (1ULL << tt_combined.granule_sz) - 1;
+ aligned_addr = addr & ~page_mask;
+
+ cached_entry = smmu_iotlb_lookup(bs, cfg, &tt_combined, aligned_addr);
+ if (cached_entry) {
+ if ((flag & IOMMU_WO) && !(cached_entry->entry.perm & IOMMU_WO)) {
+ info->type = SMMU_PTW_ERR_PERMISSION;
+ info->stage = cfg->stage;
+ return NULL;
+ }
+ return cached_entry;
+ }
+
+ cached_entry = g_new0(SMMUTLBEntry, 1);
+ status = smmu_ptw(cfg, aligned_addr, flag, cached_entry, info);
+ if (status) {
+ g_free(cached_entry);
+ return NULL;
+ }
+ smmu_iotlb_insert(bs, cfg, cached_entry);
+ return cached_entry;
+}
+
/**
* The bus number is used for lookup when SID based invalidation occurs.
* In that case we lazily populate the SMMUPciBus array from the bus hash
@@ -827,6 +827,76 @@ static void smmuv3_flush_config(SMMUDevice *sdev)
g_hash_table_remove(bc->configs, sdev);
}
+/* Do translation with TLB lookup. */
+static SMMUTranslationStatus smmuv3_do_translate(SMMUv3State *s, hwaddr addr,
+ SMMUTransCfg *cfg,
+ SMMUEventInfo *event,
+ IOMMUAccessFlags flag,
+ SMMUTLBEntry **out_entry)
+{
+ SMMUPTWEventInfo ptw_info = {};
+ SMMUState *bs = ARM_SMMU(s);
+ SMMUTLBEntry *cached_entry = NULL;
+
+ cached_entry = smmu_translate(bs, cfg, addr, flag, &ptw_info);
+ if (!cached_entry) {
+ /* All faults from PTW has S2 field. */
+ event->u.f_walk_eabt.s2 = (ptw_info.stage == SMMU_STAGE_2);
+ switch (ptw_info.type) {
+ case SMMU_PTW_ERR_WALK_EABT:
+ event->type = SMMU_EVT_F_WALK_EABT;
+ event->u.f_walk_eabt.addr = addr;
+ event->u.f_walk_eabt.rnw = flag & 0x1;
+ event->u.f_walk_eabt.class = (ptw_info.stage == SMMU_STAGE_2) ?
+ SMMU_CLASS_IN : SMMU_CLASS_TT;
+ event->u.f_walk_eabt.addr2 = ptw_info.addr;
+ break;
+ case SMMU_PTW_ERR_TRANSLATION:
+ if (PTW_RECORD_FAULT(cfg)) {
+ event->type = SMMU_EVT_F_TRANSLATION;
+ event->u.f_translation.addr = addr;
+ event->u.f_translation.addr2 = ptw_info.addr;
+ event->u.f_translation.class = SMMU_CLASS_IN;
+ event->u.f_translation.rnw = flag & 0x1;
+ }
+ break;
+ case SMMU_PTW_ERR_ADDR_SIZE:
+ if (PTW_RECORD_FAULT(cfg)) {
+ event->type = SMMU_EVT_F_ADDR_SIZE;
+ event->u.f_addr_size.addr = addr;
+ event->u.f_addr_size.addr2 = ptw_info.addr;
+ event->u.f_addr_size.class = SMMU_CLASS_IN;
+ event->u.f_addr_size.rnw = flag & 0x1;
+ }
+ break;
+ case SMMU_PTW_ERR_ACCESS:
+ if (PTW_RECORD_FAULT(cfg)) {
+ event->type = SMMU_EVT_F_ACCESS;
+ event->u.f_access.addr = addr;
+ event->u.f_access.addr2 = ptw_info.addr;
+ event->u.f_access.class = SMMU_CLASS_IN;
+ event->u.f_access.rnw = flag & 0x1;
+ }
+ break;
+ case SMMU_PTW_ERR_PERMISSION:
+ if (PTW_RECORD_FAULT(cfg)) {
+ event->type = SMMU_EVT_F_PERMISSION;
+ event->u.f_permission.addr = addr;
+ event->u.f_permission.addr2 = ptw_info.addr;
+ event->u.f_permission.class = SMMU_CLASS_IN;
+ event->u.f_permission.rnw = flag & 0x1;
+ }
+ break;
+ default:
+ g_assert_not_reached();
+ }
+ return SMMU_TRANS_ERROR;
+ }
+ *out_entry = cached_entry;
+ return SMMU_TRANS_SUCCESS;
+}
+
+/* Entry point to SMMU, does everything. */
static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
IOMMUAccessFlags flag, int iommu_idx)
{
@@ -836,12 +906,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
SMMUEventInfo event = {.type = SMMU_EVT_NONE,
.sid = sid,
.inval_ste_allowed = false};
- SMMUPTWEventInfo ptw_info = {};
SMMUTranslationStatus status;
- SMMUState *bs = ARM_SMMU(s);
- uint64_t page_mask, aligned_addr;
- SMMUTLBEntry *cached_entry = NULL;
- SMMUTransTableInfo *tt;
SMMUTransCfg *cfg = NULL;
IOMMUTLBEntry entry = {
.target_as = &address_space_memory,
@@ -850,11 +915,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
.addr_mask = ~(hwaddr)0,
.perm = IOMMU_NONE,
};
- /*
- * Combined attributes used for TLB lookup, as only one stage is supported,
- * it will hold attributes based on the enabled stage.
- */
- SMMUTransTableInfo tt_combined;
+ SMMUTLBEntry *cached_entry = NULL;
qemu_mutex_lock(&s->mutex);
@@ -883,115 +944,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
goto epilogue;
}
- if (cfg->stage == SMMU_STAGE_1) {
- /* Select stage1 translation table. */
- tt = select_tt(cfg, addr);
- if (!tt) {
- if (cfg->record_faults) {
- event.type = SMMU_EVT_F_TRANSLATION;
- event.u.f_translation.addr = addr;
- event.u.f_translation.rnw = flag & 0x1;
- }
- status = SMMU_TRANS_ERROR;
- goto epilogue;
- }
- tt_combined.granule_sz = tt->granule_sz;
- tt_combined.tsz = tt->tsz;
-
- } else {
- /* Stage2. */
- tt_combined.granule_sz = cfg->s2cfg.granule_sz;
- tt_combined.tsz = cfg->s2cfg.tsz;
- }
- /*
- * TLB lookup looks for granule and input size for a translation stage,
- * as only one stage is supported right now, choose the right values
- * from the configuration.
- */
- page_mask = (1ULL << tt_combined.granule_sz) - 1;
- aligned_addr = addr & ~page_mask;
-
- cached_entry = smmu_iotlb_lookup(bs, cfg, &tt_combined, aligned_addr);
- if (cached_entry) {
- if ((flag & IOMMU_WO) && !(cached_entry->entry.perm & IOMMU_WO)) {
- status = SMMU_TRANS_ERROR;
- /*
- * We know that the TLB only contains either stage-1 or stage-2 as
- * nesting is not supported. So it is sufficient to check the
- * translation stage to know the TLB stage for now.
- */
- event.u.f_walk_eabt.s2 = (cfg->stage == SMMU_STAGE_2);
- if (PTW_RECORD_FAULT(cfg)) {
- event.type = SMMU_EVT_F_PERMISSION;
- event.u.f_permission.addr = addr;
- event.u.f_permission.rnw = flag & 0x1;
- }
- } else {
- status = SMMU_TRANS_SUCCESS;
- }
- goto epilogue;
- }
-
- cached_entry = g_new0(SMMUTLBEntry, 1);
-
- if (smmu_ptw(cfg, aligned_addr, flag, cached_entry, &ptw_info)) {
- /* All faults from PTW has S2 field. */
- event.u.f_walk_eabt.s2 = (ptw_info.stage == SMMU_STAGE_2);
- g_free(cached_entry);
- switch (ptw_info.type) {
- case SMMU_PTW_ERR_WALK_EABT:
- event.type = SMMU_EVT_F_WALK_EABT;
- event.u.f_walk_eabt.addr = addr;
- event.u.f_walk_eabt.rnw = flag & 0x1;
- /* Stage-2 (only) is class IN while stage-1 is class TT */
- event.u.f_walk_eabt.class = (ptw_info.stage == SMMU_STAGE_2) ?
- SMMU_CLASS_IN : SMMU_CLASS_TT;
- event.u.f_walk_eabt.addr2 = ptw_info.addr;
- break;
- case SMMU_PTW_ERR_TRANSLATION:
- if (PTW_RECORD_FAULT(cfg)) {
- event.type = SMMU_EVT_F_TRANSLATION;
- event.u.f_translation.addr = addr;
- event.u.f_translation.addr2 = ptw_info.addr;
- event.u.f_translation.class = SMMU_CLASS_IN;
- event.u.f_translation.rnw = flag & 0x1;
- }
- break;
- case SMMU_PTW_ERR_ADDR_SIZE:
- if (PTW_RECORD_FAULT(cfg)) {
- event.type = SMMU_EVT_F_ADDR_SIZE;
- event.u.f_addr_size.addr = addr;
- event.u.f_addr_size.addr2 = ptw_info.addr;
- event.u.f_translation.class = SMMU_CLASS_IN;
- event.u.f_addr_size.rnw = flag & 0x1;
- }
- break;
- case SMMU_PTW_ERR_ACCESS:
- if (PTW_RECORD_FAULT(cfg)) {
- event.type = SMMU_EVT_F_ACCESS;
- event.u.f_access.addr = addr;
- event.u.f_access.addr2 = ptw_info.addr;
- event.u.f_translation.class = SMMU_CLASS_IN;
- event.u.f_access.rnw = flag & 0x1;
- }
- break;
- case SMMU_PTW_ERR_PERMISSION:
- if (PTW_RECORD_FAULT(cfg)) {
- event.type = SMMU_EVT_F_PERMISSION;
- event.u.f_permission.addr = addr;
- event.u.f_permission.addr2 = ptw_info.addr;
- event.u.f_translation.class = SMMU_CLASS_IN;
- event.u.f_permission.rnw = flag & 0x1;
- }
- break;
- default:
- g_assert_not_reached();
- }
- status = SMMU_TRANS_ERROR;
- } else {
- smmu_iotlb_insert(bs, cfg, cached_entry);
- status = SMMU_TRANS_SUCCESS;
- }
+ status = smmuv3_do_translate(s, addr, cfg, &event, flag, &cached_entry);
epilogue:
qemu_mutex_unlock(&s->mutex);
@@ -1002,7 +955,8 @@ epilogue:
(addr & cached_entry->entry.addr_mask);
entry.addr_mask = cached_entry->entry.addr_mask;
trace_smmuv3_translate_success(mr->parent_obj.name, sid, addr,
- entry.translated_addr, entry.perm);
+ entry.translated_addr, entry.perm,
+ cfg->stage);
break;
case SMMU_TRANS_DISABLE:
entry.perm = flag;
@@ -37,7 +37,7 @@ smmuv3_get_ste(uint64_t addr) "STE addr: 0x%"PRIx64
smmuv3_translate_disable(const char *n, uint16_t sid, uint64_t addr, bool is_write) "%s sid=0x%x bypass (smmu disabled) iova:0x%"PRIx64" is_write=%d"
smmuv3_translate_bypass(const char *n, uint16_t sid, uint64_t addr, bool is_write) "%s sid=0x%x STE bypass iova:0x%"PRIx64" is_write=%d"
smmuv3_translate_abort(const char *n, uint16_t sid, uint64_t addr, bool is_write) "%s sid=0x%x abort on iova:0x%"PRIx64" is_write=%d"
-smmuv3_translate_success(const char *n, uint16_t sid, uint64_t iova, uint64_t translated, int perm) "%s sid=0x%x iova=0x%"PRIx64" translated=0x%"PRIx64" perm=0x%x"
+smmuv3_translate_success(const char *n, uint16_t sid, uint64_t iova, uint64_t translated, int perm, int stage) "%s sid=0x%x iova=0x%"PRIx64" translated=0x%"PRIx64" perm=0x%x stage=%d"
smmuv3_get_cd(uint64_t addr) "CD addr: 0x%"PRIx64
smmuv3_decode_cd(uint32_t oas) "oas=%d"
smmuv3_decode_cd_tt(int i, uint32_t tsz, uint64_t ttb, uint32_t granule_sz, bool had) "TT[%d]:tsz:%d ttb:0x%"PRIx64" granule_sz:%d had:%d"
@@ -183,6 +183,14 @@ static inline uint16_t smmu_get_sid(SMMUDevice *sdev)
int smmu_ptw(SMMUTransCfg *cfg, dma_addr_t iova, IOMMUAccessFlags perm,
SMMUTLBEntry *tlbe, SMMUPTWEventInfo *info);
+
+/*
+ * smmu_translate - Look for a translation in TLB, if not, do a PTW.
+ * Returns NULL on PTW error or incase of TLB permission errors.
+ */
+SMMUTLBEntry *smmu_translate(SMMUState *bs, SMMUTransCfg *cfg, dma_addr_t addr,
+ IOMMUAccessFlags flag, SMMUPTWEventInfo *info);
+
/**
* select_tt - compute which translation table shall be used according to
* the input iova and translation config and return the TT specific info