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From 6d16102aca24bab16c846fe6457071f4466b8e35 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Tue, 23 Aug 2022 20:20:03 +0200
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Subject: [PATCH 04/23] vdpa: do not save failed dma maps in SVQ iova tree
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 116: vdpa: Restore device state on destination
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RH-Bugzilla: 2114060
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [3/21] f9bea39f7fa14c5ef0f85774cbad0ca3b52c4498 (eperezmartin/qemu-kvm)
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2114060
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Upstream status: git@github.com:jasowang/qemu.git net-next
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If a map fails for whatever reason, it must not be saved in the tree.
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Otherwise, qemu will try to unmap it in cleanup, leaving to more errors.
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Fixes: 34e3c94eda ("vdpa: Add custom IOTLB translations to SVQ")
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Reported-by: Lei Yang <leiyang@redhat.com>
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit 6cc2ec65382fde205511ac00a324995ce6ee8f28)
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---
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hw/virtio/vhost-vdpa.c | 20 +++++++++++++-------
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1 file changed, 13 insertions(+), 7 deletions(-)
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index aa7765c6bc..cc15b7d8ee 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -174,6 +174,7 @@ static void vhost_vdpa_listener_commit(MemoryListener *listener)
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static void vhost_vdpa_listener_region_add(MemoryListener *listener,
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MemoryRegionSection *section)
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{
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+ DMAMap mem_region = {};
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struct vhost_vdpa *v = container_of(listener, struct vhost_vdpa, listener);
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hwaddr iova;
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Int128 llend, llsize;
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@@ -210,13 +211,13 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
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llsize = int128_sub(llend, int128_make64(iova));
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if (v->shadow_vqs_enabled) {
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- DMAMap mem_region = {
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- .translated_addr = (hwaddr)(uintptr_t)vaddr,
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- .size = int128_get64(llsize) - 1,
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- .perm = IOMMU_ACCESS_FLAG(true, section->readonly),
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- };
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+ int r;
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- int r = vhost_iova_tree_map_alloc(v->iova_tree, &mem_region);
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+ mem_region.translated_addr = (hwaddr)(uintptr_t)vaddr,
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+ mem_region.size = int128_get64(llsize) - 1,
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+ mem_region.perm = IOMMU_ACCESS_FLAG(true, section->readonly),
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+
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+ r = vhost_iova_tree_map_alloc(v->iova_tree, &mem_region);
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if (unlikely(r != IOVA_OK)) {
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error_report("Can't allocate a mapping (%d)", r);
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goto fail;
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@@ -230,11 +231,16 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
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vaddr, section->readonly);
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if (ret) {
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error_report("vhost vdpa map fail!");
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- goto fail;
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+ goto fail_map;
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}
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return;
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+fail_map:
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+ if (v->shadow_vqs_enabled) {
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+ vhost_iova_tree_remove(v->iova_tree, &mem_region);
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+ }
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+
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fail:
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/*
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* On the initfn path, store the first error in the container so we
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--
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2.31.1
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