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authorStefano Garzarella2022-11-21 11:11:01 +0100
committerMichael S. Tsirkin2022-11-22 11:19:00 +0100
commit562a7d23bf9a2f978cea799af40a1b2b0b4fc71b (patch)
treead37c3d6930642ebcfe1e9eaab97cff47d414039
parentUpdate VERSION for v7.2.0-rc1 (diff)
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vhost: mask VIRTIO_F_RING_RESET for vhost and vhost-user devices
Commit 69e1c14aa2 ("virtio: core: vq reset feature negotation support") enabled VIRTIO_F_RING_RESET by default for all virtio devices. This feature is not currently emulated by QEMU, so for vhost and vhost-user devices we need to make sure it is supported by the offloaded device emulation (in-kernel or in another process). To do this we need to add VIRTIO_F_RING_RESET to the features bitmap passed to vhost_get_features(). This way it will be masked if the device does not support it. This issue was initially discovered with vhost-vsock and vhost-user-vsock, and then also tested with vhost-user-rng which confirmed the same issue. They fail when sending features through VHOST_SET_FEATURES ioctl or VHOST_USER_SET_FEATURES message, since VIRTIO_F_RING_RESET is negotiated by the guest (Linux >= v6.0), but not supported by the device. Fixes: 69e1c14aa2 ("virtio: core: vq reset feature negotation support") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1318 Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20221121101101.29400-1-sgarzare@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Raphael Norwitz <raphael.norwitz@nutanix.com> Acked-by: Jason Wang <jasowang@redhat.com>
-rw-r--r--hw/block/vhost-user-blk.c1
-rw-r--r--hw/net/vhost_net.c1
-rw-r--r--hw/scsi/vhost-scsi.c1
-rw-r--r--hw/scsi/vhost-user-scsi.c1
-rw-r--r--hw/virtio/vhost-user-fs.c1
-rw-r--r--hw/virtio/vhost-user-gpio.c1
-rw-r--r--hw/virtio/vhost-user-i2c.c1
-rw-r--r--hw/virtio/vhost-user-rng.c11
-rw-r--r--hw/virtio/vhost-vsock-common.c1
-rw-r--r--net/vhost-vdpa.c1
10 files changed, 18 insertions, 2 deletions
diff --git a/hw/block/vhost-user-blk.c b/hw/block/vhost-user-blk.c
index 16ad400889..0d5190accf 100644
--- a/hw/block/vhost-user-blk.c
+++ b/hw/block/vhost-user-blk.c
@@ -52,6 +52,7 @@ static const int user_feature_bits[] = {
VIRTIO_F_NOTIFY_ON_EMPTY,
VIRTIO_F_RING_PACKED,
VIRTIO_F_IOMMU_PLATFORM,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index feda448878..26e4930676 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -75,6 +75,7 @@ static const int user_feature_bits[] = {
VIRTIO_NET_F_MTU,
VIRTIO_F_IOMMU_PLATFORM,
VIRTIO_F_RING_PACKED,
+ VIRTIO_F_RING_RESET,
VIRTIO_NET_F_RSS,
VIRTIO_NET_F_HASH_REPORT,
diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c
index bdf337a7a2..6a0fd0dfb1 100644
--- a/hw/scsi/vhost-scsi.c
+++ b/hw/scsi/vhost-scsi.c
@@ -38,6 +38,7 @@ static const int kernel_feature_bits[] = {
VIRTIO_RING_F_INDIRECT_DESC,
VIRTIO_RING_F_EVENT_IDX,
VIRTIO_SCSI_F_HOTPLUG,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/scsi/vhost-user-scsi.c b/hw/scsi/vhost-user-scsi.c
index bc37317d55..b7a71a802c 100644
--- a/hw/scsi/vhost-user-scsi.c
+++ b/hw/scsi/vhost-user-scsi.c
@@ -36,6 +36,7 @@ static const int user_feature_bits[] = {
VIRTIO_RING_F_INDIRECT_DESC,
VIRTIO_RING_F_EVENT_IDX,
VIRTIO_SCSI_F_HOTPLUG,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
index 1c40f42045..dc4014cdef 100644
--- a/hw/virtio/vhost-user-fs.c
+++ b/hw/virtio/vhost-user-fs.c
@@ -32,6 +32,7 @@ static const int user_feature_bits[] = {
VIRTIO_F_NOTIFY_ON_EMPTY,
VIRTIO_F_RING_PACKED,
VIRTIO_F_IOMMU_PLATFORM,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/virtio/vhost-user-gpio.c b/hw/virtio/vhost-user-gpio.c
index 677d1c7730..5851cb3bc9 100644
--- a/hw/virtio/vhost-user-gpio.c
+++ b/hw/virtio/vhost-user-gpio.c
@@ -24,6 +24,7 @@ static const int feature_bits[] = {
VIRTIO_RING_F_INDIRECT_DESC,
VIRTIO_RING_F_EVENT_IDX,
VIRTIO_GPIO_F_IRQ,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/virtio/vhost-user-i2c.c b/hw/virtio/vhost-user-i2c.c
index 864eba695e..1c9f3d20dc 100644
--- a/hw/virtio/vhost-user-i2c.c
+++ b/hw/virtio/vhost-user-i2c.c
@@ -16,6 +16,7 @@
static const int feature_bits[] = {
VIRTIO_I2C_F_ZERO_LENGTH_REQUEST,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/hw/virtio/vhost-user-rng.c b/hw/virtio/vhost-user-rng.c
index 8b47287875..f9084cde58 100644
--- a/hw/virtio/vhost-user-rng.c
+++ b/hw/virtio/vhost-user-rng.c
@@ -16,6 +16,11 @@
#include "qemu/error-report.h"
#include "standard-headers/linux/virtio_ids.h"
+static const int feature_bits[] = {
+ VIRTIO_F_RING_RESET,
+ VHOST_INVALID_FEATURE_BIT
+};
+
static void vu_rng_start(VirtIODevice *vdev)
{
VHostUserRNG *rng = VHOST_USER_RNG(vdev);
@@ -106,8 +111,10 @@ static void vu_rng_set_status(VirtIODevice *vdev, uint8_t status)
static uint64_t vu_rng_get_features(VirtIODevice *vdev,
uint64_t requested_features, Error **errp)
{
- /* No feature bits used yet */
- return requested_features;
+ VHostUserRNG *rng = VHOST_USER_RNG(vdev);
+
+ return vhost_get_features(&rng->vhost_dev, feature_bits,
+ requested_features);
}
static void vu_rng_handle_output(VirtIODevice *vdev, VirtQueue *vq)
diff --git a/hw/virtio/vhost-vsock-common.c b/hw/virtio/vhost-vsock-common.c
index 29b9ab4f72..a67a275de2 100644
--- a/hw/virtio/vhost-vsock-common.c
+++ b/hw/virtio/vhost-vsock-common.c
@@ -21,6 +21,7 @@
const int feature_bits[] = {
VIRTIO_VSOCK_F_SEQPACKET,
+ VIRTIO_F_RING_RESET,
VHOST_INVALID_FEATURE_BIT
};
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 6811089231..2b4b85d8f8 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -69,6 +69,7 @@ const int vdpa_feature_bits[] = {
VIRTIO_NET_F_CTRL_VQ,
VIRTIO_F_IOMMU_PLATFORM,
VIRTIO_F_RING_PACKED,
+ VIRTIO_F_RING_RESET,
VIRTIO_NET_F_RSS,
VIRTIO_NET_F_HASH_REPORT,
VIRTIO_NET_F_GUEST_ANNOUNCE,