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[PATCH for-5.0 v11 08/20] virtio-iommu: Implement translate
From: |
Eric Auger |
Subject: |
[PATCH for-5.0 v11 08/20] virtio-iommu: Implement translate |
Date: |
Fri, 22 Nov 2019 19:29:31 +0100 |
This patch implements the translate callback
Signed-off-by: Eric Auger <address@hidden>
---
v10 -> v11:
- take into account the new value struct and use
g_tree_lookup_extended
- switched to error_report_once
v6 -> v7:
- implemented bypass-mode
v5 -> v6:
- replace error_report by qemu_log_mask
v4 -> v5:
- check the device domain is not NULL
- s/printf/error_report
- set flags to IOMMU_NONE in case of all translation faults
---
hw/virtio/trace-events | 1 +
hw/virtio/virtio-iommu.c | 63 +++++++++++++++++++++++++++++++++++++++-
2 files changed, 63 insertions(+), 1 deletion(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index f25359cee2..de7cbb3c8f 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -72,3 +72,4 @@ virtio_iommu_get_endpoint(uint32_t ep_id) "Alloc endpoint=%d"
virtio_iommu_put_endpoint(uint32_t ep_id) "Free endpoint=%d"
virtio_iommu_get_domain(uint32_t domain_id) "Alloc domain=%d"
virtio_iommu_put_domain(uint32_t domain_id) "Free domain=%d"
+virtio_iommu_translate_out(uint64_t virt_addr, uint64_t phys_addr, uint32_t
sid) "0x%"PRIx64" -> 0x%"PRIx64 " for sid=%d"
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index f0a56833a2..a83666557b 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -412,19 +412,80 @@ static IOMMUTLBEntry
virtio_iommu_translate(IOMMUMemoryRegion *mr, hwaddr addr,
int iommu_idx)
{
IOMMUDevice *sdev = container_of(mr, IOMMUDevice, iommu_mr);
+ viommu_interval interval, *mapping_key;
+ viommu_mapping *mapping_value;
+ VirtIOIOMMU *s = sdev->viommu;
+ viommu_endpoint *ep;
+ bool bypass_allowed;
uint32_t sid;
+ bool found;
+
+ interval.low = addr;
+ interval.high = addr + 1;
IOMMUTLBEntry entry = {
.target_as = &address_space_memory,
.iova = addr,
.translated_addr = addr,
- .addr_mask = ~(hwaddr)0,
+ .addr_mask = (1 << ctz32(s->config.page_size_mask)) - 1,
.perm = IOMMU_NONE,
};
+ bypass_allowed = virtio_has_feature(s->acked_features,
+ VIRTIO_IOMMU_F_BYPASS);
+
sid = virtio_iommu_get_sid(sdev);
trace_virtio_iommu_translate(mr->parent_obj.name, sid, addr, flag);
+ qemu_mutex_lock(&s->mutex);
+
+ ep = g_tree_lookup(s->endpoints, GUINT_TO_POINTER(sid));
+ if (!ep) {
+ if (!bypass_allowed) {
+ error_report_once("%s sid=%d is not known!!", __func__, sid);
+ } else {
+ entry.perm = flag;
+ }
+ goto unlock;
+ }
+
+ if (!ep->domain) {
+ if (!bypass_allowed) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s %02x:%02x.%01x not attached to any domain\n",
+ __func__, PCI_BUS_NUM(sid),
+ PCI_SLOT(sid), PCI_FUNC(sid));
+ } else {
+ entry.perm = flag;
+ }
+ goto unlock;
+ }
+
+ found = g_tree_lookup_extended(ep->domain->mappings, (gpointer)(&interval),
+ (void **)&mapping_key,
+ (void **)&mapping_value);
+ if (!found) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "%s no mapping for 0x%"PRIx64" for sid=%d\n",
+ __func__, addr, sid);
+ goto unlock;
+ }
+
+ if (((flag & IOMMU_RO) &&
+ !(mapping_value->flags & VIRTIO_IOMMU_MAP_F_READ)) ||
+ ((flag & IOMMU_WO) &&
+ !(mapping_value->flags & VIRTIO_IOMMU_MAP_F_WRITE))) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "Permission error on 0x%"PRIx64"(%d): allowed=%d\n",
+ addr, flag, mapping_value->flags);
+ goto unlock;
+ }
+ entry.translated_addr = addr - mapping_key->low + mapping_value->phys_addr;
+ entry.perm = flag;
+ trace_virtio_iommu_translate_out(addr, entry.translated_addr, sid);
+
+unlock:
+ qemu_mutex_unlock(&s->mutex);
return entry;
}
--
2.20.1
- [PATCH for-5.0 v11 00/20] VIRTIO-IOMMU device, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 01/20] migration: Support QLIST migration, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 04/20] virtio-iommu: Add the iommu regions, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 03/20] virtio-iommu: Decode the command payload, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 02/20] virtio-iommu: Add skeleton, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 05/20] virtio-iommu: Endpoint and domains structs and helpers, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 06/20] virtio-iommu: Implement attach/detach command, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 07/20] virtio-iommu: Implement map/unmap, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 08/20] virtio-iommu: Implement translate,
Eric Auger <=
- [PATCH for-5.0 v11 09/20] virtio-iommu: Implement fault reporting, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 10/20] virtio-iommu-pci: Add virtio iommu pci support, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 11/20] hw/arm/virt: Add the virtio-iommu device tree mappings, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 12/20] qapi: Introduce DEFINE_PROP_INTERVAL, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 13/20] virtio-iommu: Implement probe request, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 14/20] virtio-iommu: Handle reserved regions in the translation process, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 15/20] virtio-iommu-pci: Add array of Interval properties, Eric Auger, 2019/11/22
- [PATCH for-5.0 v11 16/20] hw/arm/virt-acpi-build: Introduce fill_iort_idmap helper, Eric Auger, 2019/11/22