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hw/arm/smmu: Support nesting in smmuv3_range_inval()

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With nesting, we would need to invalidate IPAs without
over-invalidating stage-1 IOVAs. This can be done by
distinguishing IPAs in the TLBs by having ASID=-1.
To achieve that, rework the invalidation for IPAs to have a
separate function, while for IOVA invalidation ASID=-1 means
invalidate for all ASIDs.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Mostafa Saleh <smostafa@google.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20240715084519.1189624-13-smostafa@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Mostafa Saleh 2024-07-15 08:45:12 +00:00 • committed by Peter Maydell
parent f42a0a57c0
commit 1ea8a6f59b
4 changed files with 66 additions and 9 deletions
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47
hw/arm/smmu-common.c
View file

@ -195,6 +195,25 @@ static gboolean smmu_hash_remove_by_asid_vmid_iova(gpointer key, gpointer value,
((entry->iova & ~info->mask) == info->iova);
}
static gboolean smmu_hash_remove_by_vmid_ipa(gpointer key, gpointer value,
gpointer user_data)
{
SMMUTLBEntry *iter = (SMMUTLBEntry *)value;
IOMMUTLBEntry *entry = &iter->entry;
SMMUIOTLBPageInvInfo *info = (SMMUIOTLBPageInvInfo *)user_data;
SMMUIOTLBKey iotlb_key = *(SMMUIOTLBKey *)key;
if (SMMU_IOTLB_ASID(iotlb_key) >= 0) {
/* This is a stage-1 address. */
return false;
}
if (info->vmid != SMMU_IOTLB_VMID(iotlb_key)) {
return false;
}
return ((info->iova & ~entry->addr_mask) == entry->iova) ||
((entry->iova & ~info->mask) == info->iova);
}
void smmu_iotlb_inv_iova(SMMUState *s, int asid, int vmid, dma_addr_t iova,
uint8_t tg, uint64_t num_pages, uint8_t ttl)
{
@ -223,6 +242,34 @@ void smmu_iotlb_inv_iova(SMMUState *s, int asid, int vmid, dma_addr_t iova,
&info);
}
/*
* Similar to smmu_iotlb_inv_iova(), but for Stage-2, ASID is always -1,
* in Stage-1 invalidation ASID = -1, means don't care.
*/
void smmu_iotlb_inv_ipa(SMMUState *s, int vmid, dma_addr_t ipa, uint8_t tg,
uint64_t num_pages, uint8_t ttl)
{
uint8_t granule = tg ? tg * 2 + 10 : 12;
int asid = -1;
if (ttl && (num_pages == 1)) {
SMMUIOTLBKey key = smmu_get_iotlb_key(asid, vmid, ipa, tg, ttl);
if (g_hash_table_remove(s->iotlb, &key)) {
return;
}
}
SMMUIOTLBPageInvInfo info = {
.iova = ipa,
.vmid = vmid,
.mask = (num_pages << granule) - 1};
g_hash_table_foreach_remove(s->iotlb,
smmu_hash_remove_by_vmid_ipa,
&info);
}
void smmu_iotlb_inv_asid(SMMUState *s, int asid)
{
trace_smmu_iotlb_inv_asid(asid);