According to spec, Page-Selective-within-Domain Invalidation (11b):
1. IOTLB entries caching second-stage mappings (PGTT=010b) or pass-through
(PGTT=100b) mappings associated with the specified domain-id and the
input-address range are invalidated.
2. IOTLB entries caching first-stage (PGTT=001b) or nested (PGTT=011b)
mapping associated with specified domain-id are invalidated.
So per spec definition the Page-Selective-within-Domain Invalidation
needs to flush first stage and nested cached IOTLB enties as well.
We don't support nested yet and pass-through mapping is never cached,
so what in iotlb cache are only first-stage and second-stage mappings.
Add a tag pgtt in VTDIOTLBEntry to mark PGTT type of the mapping and
invalidate entries based on PGTT type.
Signed-off-by: Zhenzhong Duan <zhenzhong.d...@intel.com>
Reviewed-by: Clément Mathieu--Drif<clement.mathieu--d...@eviden.com>
Acked-by: Jason Wang <jasow...@redhat.com>
---
include/hw/i386/intel_iommu.h | 1 +
hw/i386/intel_iommu.c | 27 +++++++++++++++++++++------
2 files changed, 22 insertions(+), 6 deletions(-)
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index fe9057c50d..b843d069cc 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -155,6 +155,7 @@ struct VTDIOTLBEntry {
uint64_t pte;
uint64_t mask;
uint8_t access_flags;
+ uint8_t pgtt;
};
/* VT-d Source-ID Qualifier types */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index 99bb3f42ea..46bde1ad40 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -305,9 +305,21 @@ static gboolean vtd_hash_remove_by_page(gpointer key,
gpointer value,
VTDIOTLBPageInvInfo *info = (VTDIOTLBPageInvInfo *)user_data;
uint64_t gfn = (info->addr >> VTD_PAGE_SHIFT_4K) & info->mask;
uint64_t gfn_tlb = (info->addr & entry->mask) >> VTD_PAGE_SHIFT_4K;
- return (entry->domain_id == info->domain_id) &&
- (((entry->gfn & info->mask) == gfn) ||
- (entry->gfn == gfn_tlb));
+
+ if (entry->domain_id != info->domain_id) {
+ return false;
+ }
+
+ /*
+ * According to spec, IOTLB entries caching first-stage (PGTT=001b) or
+ * nested (PGTT=011b) mapping associated with specified domain-id are
+ * invalidated. Nested isn't supported yet, so only need to check 001b.
+ */
+ if (entry->pgtt == VTD_SM_PASID_ENTRY_FLT) {
+ return true;
+ }
+
+ return (entry->gfn & info->mask) == gfn || entry->gfn == gfn_tlb;
}
/* Reset all the gen of VTDAddressSpace to zero and set the gen of
@@ -382,7 +394,7 @@ out:
static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id,
uint16_t domain_id, hwaddr addr, uint64_t pte,
uint8_t access_flags, uint32_t level,
- uint32_t pasid)
+ uint32_t pasid, uint8_t pgtt)
{
VTDIOTLBEntry *entry = g_malloc(sizeof(*entry));
struct vtd_iotlb_key *key = g_malloc(sizeof(*key));
@@ -400,6 +412,7 @@ static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t
source_id,
entry->access_flags = access_flags;
entry->mask = vtd_pt_level_page_mask(level);
entry->pasid = pasid;
+ entry->pgtt = pgtt;
key->gfn = gfn;
key->sid = source_id;
@@ -2069,7 +2082,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace
*vtd_as, PCIBus *bus,
bool is_fpd_set = false;
bool reads = true;
bool writes = true;
- uint8_t access_flags;
+ uint8_t access_flags, pgtt;
bool rid2pasid = (pasid == PCI_NO_PASID) && s->root_scalable;
VTDIOTLBEntry *iotlb_entry;
@@ -2177,9 +2190,11 @@ static bool vtd_do_iommu_translate(VTDAddressSpace
*vtd_as, PCIBus *bus,
if (s->scalable_modern && s->root_scalable) {
ret_fr = vtd_iova_to_flpte(s, &ce, addr, is_write, &pte, &level,
&reads, &writes, s->aw_bits, pasid);
+ pgtt = VTD_SM_PASID_ENTRY_FLT;
} else {
ret_fr = vtd_iova_to_slpte(s, &ce, addr, is_write, &pte, &level,
&reads, &writes, s->aw_bits, pasid);
+ pgtt = VTD_SM_PASID_ENTRY_SLT;
}
if (ret_fr) {
vtd_report_fault(s, -ret_fr, is_fpd_set, source_id,
@@ -2190,7 +2205,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace
*vtd_as, PCIBus *bus,
page_mask = vtd_pt_level_page_mask(level);
access_flags = IOMMU_ACCESS_FLAG(reads, writes);
vtd_update_iotlb(s, source_id, vtd_get_domain_id(s, &ce, pasid),
- addr, pte, access_flags, level, pasid);
+ addr, pte, access_flags, level, pasid, pgtt);
out:
vtd_iommu_unlock(s);
entry->iova = addr & page_mask;
--
2.34.1
