intel_iommu: support device iotlb descriptor
This patch enables device IOTLB support for intel iommu. The major
work is to implement QI device IOTLB descriptor processing and notify
the device through iommu notifier.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index e39b764..ec62239 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -738,11 +738,18 @@
"context-entry hi 0x%"PRIx64 " lo 0x%"PRIx64,
ce->hi, ce->lo);
return -VTD_FR_CONTEXT_ENTRY_INV;
- } else if (ce->lo & VTD_CONTEXT_ENTRY_TT) {
- VTD_DPRINTF(GENERAL, "error: unsupported Translation Type in "
- "context-entry hi 0x%"PRIx64 " lo 0x%"PRIx64,
- ce->hi, ce->lo);
- return -VTD_FR_CONTEXT_ENTRY_INV;
+ } else {
+ switch (ce->lo & VTD_CONTEXT_ENTRY_TT) {
+ case VTD_CONTEXT_TT_MULTI_LEVEL:
+ /* fall through */
+ case VTD_CONTEXT_TT_DEV_IOTLB:
+ break;
+ default:
+ VTD_DPRINTF(GENERAL, "error: unsupported Translation Type in "
+ "context-entry hi 0x%"PRIx64 " lo 0x%"PRIx64,
+ ce->hi, ce->lo);
+ return -VTD_FR_CONTEXT_ENTRY_INV;
+ }
}
return 0;
}
@@ -1438,7 +1445,61 @@
vtd_iec_notify_all(s, !inv_desc->iec.granularity,
inv_desc->iec.index,
inv_desc->iec.index_mask);
+ return true;
+}
+static bool vtd_process_device_iotlb_desc(IntelIOMMUState *s,
+ VTDInvDesc *inv_desc)
+{
+ VTDAddressSpace *vtd_dev_as;
+ IOMMUTLBEntry entry;
+ struct VTDBus *vtd_bus;
+ hwaddr addr;
+ uint64_t sz;
+ uint16_t sid;
+ uint8_t devfn;
+ bool size;
+ uint8_t bus_num;
+
+ addr = VTD_INV_DESC_DEVICE_IOTLB_ADDR(inv_desc->hi);
+ sid = VTD_INV_DESC_DEVICE_IOTLB_SID(inv_desc->lo);
+ devfn = sid & 0xff;
+ bus_num = sid >> 8;
+ size = VTD_INV_DESC_DEVICE_IOTLB_SIZE(inv_desc->hi);
+
+ if ((inv_desc->lo & VTD_INV_DESC_DEVICE_IOTLB_RSVD_LO) ||
+ (inv_desc->hi & VTD_INV_DESC_DEVICE_IOTLB_RSVD_HI)) {
+ VTD_DPRINTF(GENERAL, "error: non-zero reserved field in Device "
+ "IOTLB Invalidate Descriptor hi 0x%"PRIx64 " lo 0x%"PRIx64,
+ inv_desc->hi, inv_desc->lo);
+ return false;
+ }
+
+ vtd_bus = vtd_find_as_from_bus_num(s, bus_num);
+ if (!vtd_bus) {
+ goto done;
+ }
+
+ vtd_dev_as = vtd_bus->dev_as[devfn];
+ if (!vtd_dev_as) {
+ goto done;
+ }
+
+ if (size) {
+ sz = 1 << (ctz64(~(addr | (VTD_PAGE_MASK_4K - 1))) + 1);
+ addr &= ~(sz - 1);
+ } else {
+ sz = VTD_PAGE_SIZE;
+ }
+
+ entry.target_as = &vtd_dev_as->as;
+ entry.addr_mask = sz - 1;
+ entry.iova = addr;
+ entry.perm = IOMMU_NONE;
+ entry.translated_addr = 0;
+ memory_region_notify_iommu(entry.target_as->root, entry);
+
+done:
return true;
}
@@ -1490,6 +1551,14 @@
}
break;
+ case VTD_INV_DESC_DEVICE:
+ VTD_DPRINTF(INV, "Device IOTLB Invalidation Descriptor hi 0x%"PRIx64
+ " lo 0x%"PRIx64, inv_desc.hi, inv_desc.lo);
+ if (!vtd_process_device_iotlb_desc(s, &inv_desc)) {
+ return false;
+ }
+ break;
+
default:
VTD_DPRINTF(GENERAL, "error: unkonw Invalidation Descriptor type "
"hi 0x%"PRIx64 " lo 0x%"PRIx64 " type %"PRIu8,
@@ -2415,6 +2484,10 @@
assert(s->intr_eim != ON_OFF_AUTO_AUTO);
}
+ if (x86_iommu->dt_supported) {
+ s->ecap |= VTD_ECAP_DT;
+ }
+
vtd_reset_context_cache(s);
vtd_reset_iotlb(s);
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 11abfa2..356f188 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -183,6 +183,7 @@
/* (offset >> 4) << 8 */
#define VTD_ECAP_IRO (DMAR_IOTLB_REG_OFFSET << 4)
#define VTD_ECAP_QI (1ULL << 1)
+#define VTD_ECAP_DT (1ULL << 2)
/* Interrupt Remapping support */
#define VTD_ECAP_IR (1ULL << 3)
#define VTD_ECAP_EIM (1ULL << 4)
@@ -326,6 +327,7 @@
#define VTD_INV_DESC_TYPE 0xf
#define VTD_INV_DESC_CC 0x1 /* Context-cache Invalidate Desc */
#define VTD_INV_DESC_IOTLB 0x2
+#define VTD_INV_DESC_DEVICE 0x3
#define VTD_INV_DESC_IEC 0x4 /* Interrupt Entry Cache
Invalidate Descriptor */
#define VTD_INV_DESC_WAIT 0x5 /* Invalidation Wait Descriptor */
@@ -361,6 +363,13 @@
#define VTD_INV_DESC_IOTLB_RSVD_LO 0xffffffff0000ff00ULL
#define VTD_INV_DESC_IOTLB_RSVD_HI 0xf80ULL
+/* Mask for Device IOTLB Invalidate Descriptor */
+#define VTD_INV_DESC_DEVICE_IOTLB_ADDR(val) ((val) & 0xfffffffffffff000ULL)
+#define VTD_INV_DESC_DEVICE_IOTLB_SIZE(val) ((val) & 0x1)
+#define VTD_INV_DESC_DEVICE_IOTLB_SID(val) (((val) >> 32) & 0xFFFFULL)
+#define VTD_INV_DESC_DEVICE_IOTLB_RSVD_HI 0xffeULL
+#define VTD_INV_DESC_DEVICE_IOTLB_RSVD_LO 0xffff0000ffe0fff8
+
/* Information about page-selective IOTLB invalidate */
struct VTDIOTLBPageInvInfo {
uint16_t domain_id;
@@ -399,8 +408,8 @@
#define VTD_CONTEXT_ENTRY_FPD (1ULL << 1) /* Fault Processing Disable */
#define VTD_CONTEXT_ENTRY_TT (3ULL << 2) /* Translation Type */
#define VTD_CONTEXT_TT_MULTI_LEVEL 0
-#define VTD_CONTEXT_TT_DEV_IOTLB 1
-#define VTD_CONTEXT_TT_PASS_THROUGH 2
+#define VTD_CONTEXT_TT_DEV_IOTLB (1ULL << 2)
+#define VTD_CONTEXT_TT_PASS_THROUGH (2ULL << 2)
/* Second Level Page Translation Pointer*/
#define VTD_CONTEXT_ENTRY_SLPTPTR (~0xfffULL)
#define VTD_CONTEXT_ENTRY_RSVD_LO (0xff0ULL | ~VTD_HAW_MASK)
diff --git a/hw/i386/x86-iommu.c b/hw/i386/x86-iommu.c
index 2278af7..23dcd3f 100644
--- a/hw/i386/x86-iommu.c
+++ b/hw/i386/x86-iommu.c
@@ -106,6 +106,18 @@
s->intr_supported = value;
}
+static bool x86_iommu_device_iotlb_prop_get(Object *o, Error **errp)
+{
+ X86IOMMUState *s = X86_IOMMU_DEVICE(o);
+ return s->dt_supported;
+}
+
+static void x86_iommu_device_iotlb_prop_set(Object *o, bool value, Error **errp)
+{
+ X86IOMMUState *s = X86_IOMMU_DEVICE(o);
+ s->dt_supported = value;
+}
+
static void x86_iommu_instance_init(Object *o)
{
X86IOMMUState *s = X86_IOMMU_DEVICE(o);
@@ -114,6 +126,11 @@
s->intr_supported = false;
object_property_add_bool(o, "intremap", x86_iommu_intremap_prop_get,
x86_iommu_intremap_prop_set, NULL);
+ s->dt_supported = false;
+ object_property_add_bool(o, "device-iotlb",
+ x86_iommu_device_iotlb_prop_get,
+ x86_iommu_device_iotlb_prop_set,
+ NULL);
}
static const TypeInfo x86_iommu_info = {
diff --git a/include/hw/i386/x86-iommu.h b/include/hw/i386/x86-iommu.h
index 0c89d98..361c07c 100644
--- a/include/hw/i386/x86-iommu.h
+++ b/include/hw/i386/x86-iommu.h
@@ -73,6 +73,7 @@
struct X86IOMMUState {
SysBusDevice busdev;
bool intr_supported; /* Whether vIOMMU supports IR */
+ bool dt_supported; /* Whether vIOMMU supports DT */
IommuType type; /* IOMMU type - AMD/Intel */
QLIST_HEAD(, IEC_Notifier) iec_notifiers; /* IEC notify list */
};
