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intel_iommu: Add an internal API to find an address space with PASID

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This will be used to implement the device IOTLB invalidation

Signed-off-by: Clément Mathieu--Drif <clement.mathieu--drif@eviden.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Yi Liu <yi.l.liu@intel.com>
Message-Id: <20241212083757.605022-13-zhenzhong.duan@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Clément Mathieu--Drif 2024-12-12 16:37:49 +08:00 committed by Michael S. Tsirkin
parent 6ebe6cf2a0
commit 1075645d43
1 changed files with 24 additions and 16 deletions
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40
hw/i386/intel_iommu.c
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@ -70,6 +70,11 @@ struct vtd_hiod_key {
uint8_t devfn;
};
struct vtd_as_raw_key {
uint16_t sid;
uint32_t pasid;
};
struct vtd_iotlb_key {
uint64_t gfn;
uint32_t pasid;
@ -1859,29 +1864,32 @@ static inline bool vtd_is_interrupt_addr(hwaddr addr)
return VTD_INTERRUPT_ADDR_FIRST <= addr && addr <= VTD_INTERRUPT_ADDR_LAST;
}
static gboolean vtd_find_as_by_sid(gpointer key, gpointer value,
gpointer user_data)
static gboolean vtd_find_as_by_sid_and_pasid(gpointer key, gpointer value,
gpointer user_data)
{
struct vtd_as_key *as_key = (struct vtd_as_key *)key;
uint16_t target_sid = *(uint16_t *)user_data;
struct vtd_as_raw_key *target = (struct vtd_as_raw_key *)user_data;
uint16_t sid = PCI_BUILD_BDF(pci_bus_num(as_key->bus), as_key->devfn);
return sid == target_sid;
return (as_key->pasid == target->pasid) && (sid == target->sid);
}
static VTDAddressSpace *vtd_get_as_by_sid_and_pasid(IntelIOMMUState *s,
uint16_t sid,
uint32_t pasid)
{
struct vtd_as_raw_key key = {
.sid = sid,
.pasid = pasid
};
return g_hash_table_find(s->vtd_address_spaces,
vtd_find_as_by_sid_and_pasid, &key);
}
static VTDAddressSpace *vtd_get_as_by_sid(IntelIOMMUState *s, uint16_t sid)
{
uint8_t bus_num = PCI_BUS_NUM(sid);
VTDAddressSpace *vtd_as = s->vtd_as_cache[bus_num];
if (vtd_as &&
(sid == PCI_BUILD_BDF(pci_bus_num(vtd_as->bus), vtd_as->devfn))) {
return vtd_as;
}
vtd_as = g_hash_table_find(s->vtd_address_spaces, vtd_find_as_by_sid, &sid);
s->vtd_as_cache[bus_num] = vtd_as;
return vtd_as;
return vtd_get_as_by_sid_and_pasid(s, sid, PCI_NO_PASID);
}
static void vtd_pt_enable_fast_path(IntelIOMMUState *s, uint16_t source_id)