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hw/arm/smmu-common: Add IOTLB helpers

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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();