qemu-kvm/kvm-vdpa-add-shadow_data-to-vhost_vdpa.patch

From 6282a83619f274ca45a52d61577c10a05a0714dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
Date: Thu, 15 Dec 2022 12:31:43 +0100
Subject: [PATCH 11/14] vdpa: add shadow_data to vhost_vdpa
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
RH-MergeRequest: 136: vDPA ASID support in Qemu
RH-Bugzilla: 2104412
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
RH-Acked-by: Cindy Lu <lulu@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
RH-Commit: [11/13] 9d317add1318b555ba06e19e4c67849069e047b9 (eperezmartin/qemu-kvm)

The memory listener that thells the device how to convert GPA to qemu's
va is registered against CVQ vhost_vdpa. memory listener translations
are always ASID 0, CVQ ones are ASID 1 if supported.

Let's tell the listener if it needs to register them on iova tree or
not.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-12-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 6188d78a19894ac8f2bf9484d48a5235a529d3b7)
---
 hw/virtio/vhost-vdpa.c         | 6 +++---
 include/hw/virtio/vhost-vdpa.h | 2 ++
 net/vhost-vdpa.c               | 1 +
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 0ecf2bbaa0..dc3498e995 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -224,7 +224,7 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
                                          vaddr, section->readonly);
 
     llsize = int128_sub(llend, int128_make64(iova));
-    if (v->shadow_vqs_enabled) {
+    if (v->shadow_data) {
         int r;
 
         mem_region.translated_addr = (hwaddr)(uintptr_t)vaddr,
@@ -251,7 +251,7 @@ static void vhost_vdpa_listener_region_add(MemoryListener *listener,
     return;
 
 fail_map:
-    if (v->shadow_vqs_enabled) {
+    if (v->shadow_data) {
         vhost_iova_tree_remove(v->iova_tree, mem_region);
     }
 
@@ -296,7 +296,7 @@ static void vhost_vdpa_listener_region_del(MemoryListener *listener,
 
     llsize = int128_sub(llend, int128_make64(iova));
 
-    if (v->shadow_vqs_enabled) {
+    if (v->shadow_data) {
         const DMAMap *result;
         const void *vaddr = memory_region_get_ram_ptr(section->mr) +
             section->offset_within_region +
diff --git a/include/hw/virtio/vhost-vdpa.h b/include/hw/virtio/vhost-vdpa.h
index e57dfa1fd1..45b969a311 100644
--- a/include/hw/virtio/vhost-vdpa.h
+++ b/include/hw/virtio/vhost-vdpa.h
@@ -40,6 +40,8 @@ typedef struct vhost_vdpa {
     struct vhost_vdpa_iova_range iova_range;
     uint64_t acked_features;
     bool shadow_vqs_enabled;
+    /* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
+    bool shadow_data;
     /* IOVA mapping used by the Shadow Virtqueue */
     VhostIOVATree *iova_tree;
     GPtrArray *shadow_vqs;
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 1757f1d028..eea7a0df12 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -581,6 +581,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
     s->always_svq = svq;
     s->vhost_vdpa.shadow_vqs_enabled = svq;
     s->vhost_vdpa.iova_range = iova_range;
+    s->vhost_vdpa.shadow_data = svq;
     s->vhost_vdpa.iova_tree = iova_tree;
     if (!is_datapath) {
         s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(),
-- 
2.31.1