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hw/arm/smmu-common: Add IOTLB helpers 

Add two helpers: one to lookup for a given IOTLB entry and
one to insert a new entry. We also move the tracing there.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20200728150815.11446-3-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2020-07-28 17:08:06 +02:00 committed by Peter Maydell
parent 1733837d7c
commit 6808bca939
4 changed files with 43 additions and 26 deletions
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36
hw/arm/smmu-common.c
View File

@ -32,6 +32,42 @@
/* IOTLB Management */
IOMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg,
hwaddr iova)
{
SMMUIOTLBKey key = {.asid = cfg->asid, .iova = iova};
IOMMUTLBEntry *entry = g_hash_table_lookup(bs->iotlb, &key);
if (entry) {
cfg->iotlb_hits++;
trace_smmu_iotlb_lookup_hit(cfg->asid, iova,
cfg->iotlb_hits, cfg->iotlb_misses,
100 * cfg->iotlb_hits /
(cfg->iotlb_hits + cfg->iotlb_misses));
} else {
cfg->iotlb_misses++;
trace_smmu_iotlb_lookup_miss(cfg->asid, iova,
cfg->iotlb_hits, cfg->iotlb_misses,
100 * cfg->iotlb_hits /
(cfg->iotlb_hits + cfg->iotlb_misses));
}
return entry;
}
void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, IOMMUTLBEntry *entry)
{
SMMUIOTLBKey *key = g_new0(SMMUIOTLBKey, 1);
if (g_hash_table_size(bs->iotlb) >= SMMU_IOTLB_MAX_SIZE) {
smmu_iotlb_inv_all(bs);
}
key->asid = cfg->asid;
key->iova = entry->iova;
trace_smmu_iotlb_insert(cfg->asid, entry->iova);
g_hash_table_insert(bs->iotlb, key, entry);
}
inline void smmu_iotlb_inv_all(SMMUState *s)
{
trace_smmu_iotlb_inv_all();

26
hw/arm/smmuv3.c
View File

@ -636,7 +636,6 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
.addr_mask = ~(hwaddr)0,
.perm = IOMMU_NONE,
};
SMMUIOTLBKey key, *new_key;
qemu_mutex_lock(&s->mutex);
@ -675,16 +674,8 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
page_mask = (1ULL << (tt->granule_sz)) - 1;
aligned_addr = addr & ~page_mask;
key.asid = cfg->asid;
key.iova = aligned_addr;
cached_entry = g_hash_table_lookup(bs->iotlb, &key);
cached_entry = smmu_iotlb_lookup(bs, cfg, aligned_addr);
if (cached_entry) {
cfg->iotlb_hits++;
trace_smmu_iotlb_cache_hit(cfg->asid, aligned_addr,
cfg->iotlb_hits, cfg->iotlb_misses,
100 * cfg->iotlb_hits /
(cfg->iotlb_hits + cfg->iotlb_misses));
if ((flag & IOMMU_WO) && !(cached_entry->perm & IOMMU_WO)) {
status = SMMU_TRANS_ERROR;
if (event.record_trans_faults) {
@ -698,16 +689,6 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
goto epilogue;
}
cfg->iotlb_misses++;
trace_smmu_iotlb_cache_miss(cfg->asid, addr & ~page_mask,
cfg->iotlb_hits, cfg->iotlb_misses,
100 * cfg->iotlb_hits /
(cfg->iotlb_hits + cfg->iotlb_misses));
if (g_hash_table_size(bs->iotlb) >= SMMU_IOTLB_MAX_SIZE) {
smmu_iotlb_inv_all(bs);
}
cached_entry = g_new0(IOMMUTLBEntry, 1);
if (smmu_ptw(cfg, aligned_addr, flag, cached_entry, &ptw_info)) {
@ -753,10 +734,7 @@ static IOMMUTLBEntry smmuv3_translate(IOMMUMemoryRegion *mr, hwaddr addr,
}
status = SMMU_TRANS_ERROR;
} else {
new_key = g_new0(SMMUIOTLBKey, 1);
new_key->asid = cfg->asid;
new_key->iova = aligned_addr;
g_hash_table_insert(bs->iotlb, new_key, cached_entry);
smmu_iotlb_insert(bs, cfg, cached_entry);
status = SMMU_TRANS_SUCCESS;
}

5
hw/arm/trace-events
View File

@ -14,6 +14,9 @@ smmu_iotlb_inv_all(void) "IOTLB invalidate all"
smmu_iotlb_inv_asid(uint16_t asid) "IOTLB invalidate asid=%d"
smmu_iotlb_inv_iova(uint16_t asid, uint64_t addr) "IOTLB invalidate asid=%d addr=0x%"PRIx64
smmu_inv_notifiers_mr(const char *name) "iommu mr=%s"
smmu_iotlb_lookup_hit(uint16_t asid, uint64_t addr, uint32_t hit, uint32_t miss, uint32_t p) "IOTLB cache HIT asid=%d addr=0x%"PRIx64" hit=%d miss=%d hit rate=%d"
smmu_iotlb_lookup_miss(uint16_t asid, uint64_t addr, uint32_t hit, uint32_t miss, uint32_t p) "IOTLB cache MISS asid=%d addr=0x%"PRIx64" hit=%d miss=%d hit rate=%d"
smmu_iotlb_insert(uint16_t asid, uint64_t addr) "IOTLB ++ asid=%d addr=0x%"PRIx64
# smmuv3.c
smmuv3_read_mmio(uint64_t addr, uint64_t val, unsigned size, uint32_t r) "addr: 0x%"PRIx64" val:0x%"PRIx64" size: 0x%x(%d)"
@ -46,8 +49,6 @@ smmuv3_cmdq_tlbi_nh_va(int vmid, int asid, uint64_t addr, bool leaf) "vmid =%d a
smmuv3_cmdq_tlbi_nh_vaa(int vmid, uint64_t addr) "vmid =%d addr=0x%"PRIx64
smmuv3_cmdq_tlbi_nh(void) ""
smmuv3_cmdq_tlbi_nh_asid(uint16_t asid) "asid=%d"
smmu_iotlb_cache_hit(uint16_t asid, uint64_t addr, uint32_t hit, uint32_t miss, uint32_t p) "IOTLB cache HIT asid=%d addr=0x%"PRIx64" hit=%d miss=%d hit rate=%d"
smmu_iotlb_cache_miss(uint16_t asid, uint64_t addr, uint32_t hit, uint32_t miss, uint32_t p) "IOTLB cache MISS asid=%d addr=0x%"PRIx64" hit=%d miss=%d hit rate=%d"
smmuv3_config_cache_inv(uint32_t sid) "Config cache INV for sid %d"
smmuv3_notify_flag_add(const char *iommu) "ADD SMMUNotifier node for iommu mr=%s"
smmuv3_notify_flag_del(const char *iommu) "DEL SMMUNotifier node for iommu mr=%s"

2
include/hw/arm/smmu-common.h
View File

@ -153,6 +153,8 @@ IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t sid);
#define SMMU_IOTLB_MAX_SIZE 256
IOMMUTLBEntry *smmu_iotlb_lookup(SMMUState *bs, SMMUTransCfg *cfg, hwaddr iova);
void smmu_iotlb_insert(SMMUState *bs, SMMUTransCfg *cfg, IOMMUTLBEntry *entry);
void smmu_iotlb_inv_all(SMMUState *s);
void smmu_iotlb_inv_asid(SMMUState *s, uint16_t asid);
void smmu_iotlb_inv_iova(SMMUState *s, uint16_t asid, dma_addr_t iova);