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intel-iommu: correctly check passthrough during translation

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When scalable mode is enabled, the passthrough more is not determined
by the context entry but PASID entry, so switch to use the logic of
vtd_dev_pt_enabled() to determine the passthrough mode in
vtd_do_iommu_translate().

Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220105041945.13459-2-jasowang@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jason Wang 2022-01-05 12:19:42 +08:00 committed by Michael S. Tsirkin
parent 60f1f77cab
commit 5178d78f4b
1 changed files with 23 additions and 15 deletions
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38
hw/i386/intel_iommu.c
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@ -1516,11 +1516,29 @@ static int vtd_sync_shadow_page_table(VTDAddressSpace *vtd_as)
* 1st-level translation or 2nd-level translation, it depends
* on PGTT setting.
*/
static bool vtd_dev_pt_enabled(VTDAddressSpace *as)
static bool vtd_dev_pt_enabled(IntelIOMMUState *s, VTDContextEntry *ce)
{
VTDPASIDEntry pe;
int ret;
if (s->root_scalable) {
ret = vtd_ce_get_rid2pasid_entry(s, ce, &pe);
if (ret) {
error_report_once("%s: vtd_ce_get_rid2pasid_entry error: %"PRId32,
__func__, ret);
return false;
}
return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT);
}
return (vtd_ce_get_type(ce) == VTD_CONTEXT_TT_PASS_THROUGH);
}
static bool vtd_as_pt_enabled(VTDAddressSpace *as)
{
IntelIOMMUState *s;
VTDContextEntry ce;
VTDPASIDEntry pe;
int ret;
assert(as);
@ -1538,17 +1556,7 @@ static bool vtd_dev_pt_enabled(VTDAddressSpace *as)
return false;
}
if (s->root_scalable) {
ret = vtd_ce_get_rid2pasid_entry(s, &ce, &pe);
if (ret) {
error_report_once("%s: vtd_ce_get_rid2pasid_entry error: %"PRId32,
__func__, ret);
return false;
}
return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT);
}
return (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH);
return vtd_dev_pt_enabled(s, &ce);
}
/* Return whether the device is using IOMMU translation. */
@ -1560,7 +1568,7 @@ static bool vtd_switch_address_space(VTDAddressSpace *as)
assert(as);
use_iommu = as->iommu_state->dmar_enabled && !vtd_dev_pt_enabled(as);
use_iommu = as->iommu_state->dmar_enabled && !vtd_as_pt_enabled(as);
trace_vtd_switch_address_space(pci_bus_num(as->bus),
VTD_PCI_SLOT(as->devfn),
@ -1753,7 +1761,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus,
* We don't need to translate for pass-through context entries.
* Also, let's ignore IOTLB caching as well for PT devices.
*/
if (vtd_ce_get_type(&ce) == VTD_CONTEXT_TT_PASS_THROUGH) {
if (vtd_dev_pt_enabled(s, &ce)) {
entry->iova = addr & VTD_PAGE_MASK_4K;
entry->translated_addr = entry->iova;
entry->addr_mask = ~VTD_PAGE_MASK_4K;