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vdpa: do not save failed dma maps in SVQ iova tree

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If a map fails for whatever reason, it must not be saved in the tree.
Otherwise, qemu will try to unmap it in cleanup, leaving to more errors.

Fixes: 34e3c94eda ("vdpa: Add custom IOTLB translations to SVQ")
Reported-by: Lei Yang <leiyang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-08-23 20:20:03 +02:00 committed by Jason Wang
parent 10dab9f263
commit 7dab70bec3
1 changed files with 13 additions and 7 deletions
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20
hw/virtio/vhost-vdpa.c
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@ -176,6 +176,7 @@ static void vhost_vdpa_listener_commit(MemoryListener *listener)
static void vhost_vdpa_listener_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
DMAMap mem_region = {};
struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
hwaddr iova;
Int128 llend, llsize;
@ -212,13 +213,13 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
llsize = int128_sub(llend, int128_make64(iova));
if (v->shadow_vqs_enabled) {
DMAMap mem_region = {
.translated_addr = (hwaddr)(uintptr_t)vaddr,
.size = int128_get64(llsize) - 1,
.perm = IOMMU_ACCESS_FLAG(true, section->readonly),
};
int r;
int r = vhost_iova_tree_map_alloc(v->iova_tree, &mem_region);
mem_region.translated_addr = (hwaddr)(uintptr_t)vaddr,
mem_region.size = int128_get64(llsize) - 1,
mem_region.perm = IOMMU_ACCESS_FLAG(true, section->readonly),
r = vhost_iova_tree_map_alloc(v->iova_tree, &mem_region);
if (unlikely(r != IOVA_OK)) {
error_report("Can't allocate a mapping (%d)", r);
goto fail;
@ -232,11 +233,16 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
vaddr, section->readonly);
if (ret) {
error_report("vhost vdpa map fail!");
goto fail;
goto fail_map;
}
return;
fail_map:
if (v->shadow_vqs_enabled) {
vhost_iova_tree_remove(v->iova_tree, &mem_region);
}
fail:
/*
* On the initfn path, store the first error in the container so we