From 1075645d430e291404d19c88fc80d989669fa4c8 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Cl=C3=A9ment=20Mathieu--Drif?=
<clement.mathieu--drif@eviden.com>
Date: Thu, 12 Dec 2024 16:37:49 +0800
Subject: [PATCH] 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>
---
hw/i386/intel_iommu.c | 38 +++++++++++++++++++++++---------------
1 file changed, 23 insertions(+), 15 deletions(-)
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index c45a486bf8..9aa807593e 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -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(IntelIOMMUState *s, uint16_t sid)
+static VTDAddressSpace *vtd_get_as_by_sid_and_pasid(IntelIOMMUState *s,
+ uint16_t sid,
+ uint32_t pasid)
{
- 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;
- }
+ struct vtd_as_raw_key key = {
+ .sid = sid,
+ .pasid = pasid
+ };
- 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 g_hash_table_find(s->vtd_address_spaces,
+ vtd_find_as_by_sid_and_pasid, &key);
+}
- return vtd_as;
+static VTDAddressSpace *vtd_get_as_by_sid(IntelIOMMUState *s, uint16_t sid)
+{
+ 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)
--
2.30.2