Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost updates from Michael Tsirkin:
"virtio, vhost: optimizations, fixes
Looks like a quiet cycle for vhost/virtio, just a couple of minor
tweaks. Most notable is automatic interrupt affinity for blk and scsi.
Hopefully other devices are not far behind"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio-console: avoid DMA from stack
vhost: introduce O(1) vq metadata cache
virtio_scsi: use virtio IRQ affinity
virtio_blk: use virtio IRQ affinity
blk-mq: provide a default queue mapping for virtio device
virtio: provide a method to get the IRQ affinity mask for a virtqueue
virtio: allow drivers to request IRQ affinity when creating VQs
virtio_pci: simplify MSI-X setup
virtio_pci: don't duplicate the msix_enable flag in struct pci_dev
virtio_pci: use shared interrupts for virtqueues
virtio_pci: remove struct virtio_pci_vq_info
vhost: try avoiding avail index access when getting descriptor
virtio_mmio: expose header to userspace
diff --git a/block/Kconfig b/block/Kconfig
index a2a92e5..e9f780f 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -189,4 +189,9 @@
depends on BLOCK && PCI
default y
+config BLK_MQ_VIRTIO
+ bool
+ depends on BLOCK && VIRTIO
+ default y
+
source block/Kconfig.iosched
diff --git a/block/Makefile b/block/Makefile
index 2ad7c30..081bb68 100644
--- a/block/Makefile
+++ b/block/Makefile
@@ -25,6 +25,7 @@
obj-$(CONFIG_BLK_CMDLINE_PARSER) += cmdline-parser.o
obj-$(CONFIG_BLK_DEV_INTEGRITY) += bio-integrity.o blk-integrity.o t10-pi.o
obj-$(CONFIG_BLK_MQ_PCI) += blk-mq-pci.o
+obj-$(CONFIG_BLK_MQ_VIRTIO) += blk-mq-virtio.o
obj-$(CONFIG_BLK_DEV_ZONED) += blk-zoned.o
obj-$(CONFIG_BLK_WBT) += blk-wbt.o
obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o
diff --git a/block/blk-mq-virtio.c b/block/blk-mq-virtio.c
new file mode 100644
index 0000000..c3afbca
--- /dev/null
+++ b/block/blk-mq-virtio.c
@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2016 Christoph Hellwig.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+#include <linux/device.h>
+#include <linux/blk-mq.h>
+#include <linux/blk-mq-virtio.h>
+#include <linux/virtio_config.h>
+#include <linux/module.h>
+#include "blk-mq.h"
+
+/**
+ * blk_mq_virtio_map_queues - provide a default queue mapping for virtio device
+ * @set: tagset to provide the mapping for
+ * @vdev: virtio device associated with @set.
+ * @first_vec: first interrupt vectors to use for queues (usually 0)
+ *
+ * This function assumes the virtio device @vdev has at least as many available
+ * interrupt vetors as @set has queues. It will then queuery the vector
+ * corresponding to each queue for it's affinity mask and built queue mapping
+ * that maps a queue to the CPUs that have irq affinity for the corresponding
+ * vector.
+ */
+int blk_mq_virtio_map_queues(struct blk_mq_tag_set *set,
+ struct virtio_device *vdev, int first_vec)
+{
+ const struct cpumask *mask;
+ unsigned int queue, cpu;
+
+ if (!vdev->config->get_vq_affinity)
+ goto fallback;
+
+ for (queue = 0; queue < set->nr_hw_queues; queue++) {
+ mask = vdev->config->get_vq_affinity(vdev, first_vec + queue);
+ if (!mask)
+ goto fallback;
+
+ for_each_cpu(cpu, mask)
+ set->mq_map[cpu] = queue;
+ }
+
+ return 0;
+fallback:
+ return blk_mq_map_queues(set);
+}
+EXPORT_SYMBOL_GPL(blk_mq_virtio_map_queues);
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 024b473..1d4c9f8 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -5,6 +5,7 @@
#include <linux/hdreg.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/interrupt.h>
#include <linux/virtio.h>
#include <linux/virtio_blk.h>
#include <linux/scatterlist.h>
@@ -12,6 +13,7 @@
#include <scsi/scsi_cmnd.h>
#include <linux/idr.h>
#include <linux/blk-mq.h>
+#include <linux/blk-mq-virtio.h>
#include <linux/numa.h>
#define PART_BITS 4
@@ -426,6 +428,7 @@ static int init_vq(struct virtio_blk *vblk)
struct virtqueue **vqs;
unsigned short num_vqs;
struct virtio_device *vdev = vblk->vdev;
+ struct irq_affinity desc = { 0, };
err = virtio_cread_feature(vdev, VIRTIO_BLK_F_MQ,
struct virtio_blk_config, num_queues,
@@ -452,7 +455,8 @@ static int init_vq(struct virtio_blk *vblk)
}
/* Discover virtqueues and write information to configuration. */
- err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+ err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
+ &desc);
if (err)
goto out;
@@ -586,10 +590,18 @@ static int virtblk_init_request(void *data, struct request *rq,
return 0;
}
+static int virtblk_map_queues(struct blk_mq_tag_set *set)
+{
+ struct virtio_blk *vblk = set->driver_data;
+
+ return blk_mq_virtio_map_queues(set, vblk->vdev, 0);
+}
+
static struct blk_mq_ops virtio_mq_ops = {
.queue_rq = virtio_queue_rq,
.complete = virtblk_request_done,
.init_request = virtblk_init_request,
+ .map_queues = virtblk_map_queues,
};
static unsigned int virtblk_queue_depth;
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 17857be..e9b7e0b 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -1136,6 +1136,8 @@ static int put_chars(u32 vtermno, const char *buf, int count)
{
struct port *port;
struct scatterlist sg[1];
+ void *data;
+ int ret;
if (unlikely(early_put_chars))
return early_put_chars(vtermno, buf, count);
@@ -1144,8 +1146,14 @@ static int put_chars(u32 vtermno, const char *buf, int count)
if (!port)
return -EPIPE;
- sg_init_one(sg, buf, count);
- return __send_to_port(port, sg, 1, count, (void *)buf, false);
+ data = kmemdup(buf, count, GFP_ATOMIC);
+ if (!data)
+ return -ENOMEM;
+
+ sg_init_one(sg, data, count);
+ ret = __send_to_port(port, sg, 1, count, data, false);
+ kfree(data);
+ return ret;
}
/*
@@ -1939,7 +1947,7 @@ static int init_vqs(struct ports_device *portdev)
/* Find the queues. */
err = portdev->vdev->config->find_vqs(portdev->vdev, nr_queues, vqs,
io_callbacks,
- (const char **)io_names);
+ (const char **)io_names, NULL);
if (err)
goto free;
diff --git a/drivers/crypto/virtio/virtio_crypto_core.c b/drivers/crypto/virtio/virtio_crypto_core.c
index b5b1533..21472e4 100644
--- a/drivers/crypto/virtio/virtio_crypto_core.c
+++ b/drivers/crypto/virtio/virtio_crypto_core.c
@@ -120,7 +120,7 @@ static int virtcrypto_find_vqs(struct virtio_crypto *vi)
}
ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,
- names);
+ names, NULL);
if (ret)
goto err_find;
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 30f989a..4918668 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -176,7 +176,7 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
#endif
ret = vgdev->vdev->config->find_vqs(vgdev->vdev, 2, vqs,
- callbacks, names);
+ callbacks, names, NULL);
if (ret) {
DRM_ERROR("failed to find virt queues\n");
goto err_vqs;
diff --git a/drivers/misc/mic/vop/vop_main.c b/drivers/misc/mic/vop/vop_main.c
index 1a2b67f3..c2e29d7 100644
--- a/drivers/misc/mic/vop/vop_main.c
+++ b/drivers/misc/mic/vop/vop_main.c
@@ -374,7 +374,7 @@ static struct virtqueue *vop_find_vq(struct virtio_device *dev,
static int vop_find_vqs(struct virtio_device *dev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[], struct irq_affinity *desc)
{
struct _vop_vdev *vdev = to_vopvdev(dev);
struct vop_device *vpdev = vdev->vpdev;
diff --git a/drivers/net/caif/caif_virtio.c b/drivers/net/caif/caif_virtio.c
index b306210..bc0eb47 100644
--- a/drivers/net/caif/caif_virtio.c
+++ b/drivers/net/caif/caif_virtio.c
@@ -679,7 +679,8 @@ static int cfv_probe(struct virtio_device *vdev)
goto err;
/* Get the TX virtio ring. This is a "guest side vring". */
- err = vdev->config->find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names);
+ err = vdev->config->find_vqs(vdev, 1, &cfv->vq_tx, &vq_cbs, &names,
+ NULL);
if (err)
goto err;
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index bf95016..66fd3139b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2080,7 +2080,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi)
}
ret = vi->vdev->config->find_vqs(vi->vdev, total_vqs, vqs, callbacks,
- names);
+ names, NULL);
if (ret)
goto err_find;
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
index 364411f..0142cc3 100644
--- a/drivers/remoteproc/remoteproc_virtio.c
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -137,7 +137,8 @@ static void rproc_virtio_del_vqs(struct virtio_device *vdev)
static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
int i, ret;
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index 3090b0d..5e66e08 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -869,7 +869,7 @@ static int rpmsg_probe(struct virtio_device *vdev)
init_waitqueue_head(&vrp->sendq);
/* We expect two virtqueues, rx and tx (and in this order) */
- err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, names);
+ err = vdev->config->find_vqs(vdev, 2, vqs, vq_cbs, names, NULL);
if (err)
goto free_vrp;
diff --git a/drivers/s390/virtio/kvm_virtio.c b/drivers/s390/virtio/kvm_virtio.c
index 5e5c11f..2ce0b3e 100644
--- a/drivers/s390/virtio/kvm_virtio.c
+++ b/drivers/s390/virtio/kvm_virtio.c
@@ -255,7 +255,8 @@ static void kvm_del_vqs(struct virtio_device *vdev)
static int kvm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct kvm_device *kdev = to_kvmdev(vdev);
int i;
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
index 648373c..0ed209f 100644
--- a/drivers/s390/virtio/virtio_ccw.c
+++ b/drivers/s390/virtio/virtio_ccw.c
@@ -628,7 +628,8 @@ static int virtio_ccw_register_adapter_ind(struct virtio_ccw_device *vcdev,
static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct virtio_ccw_device *vcdev = to_vc_device(vdev);
unsigned long *indicatorp = NULL;
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index c680d76..939c47d 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mempool.h>
+#include <linux/interrupt.h>
#include <linux/virtio.h>
#include <linux/virtio_ids.h>
#include <linux/virtio_config.h>
@@ -29,6 +30,7 @@
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_tcq.h>
#include <linux/seqlock.h>
+#include <linux/blk-mq-virtio.h>
#define VIRTIO_SCSI_MEMPOOL_SZ 64
#define VIRTIO_SCSI_EVENT_LEN 8
@@ -108,7 +110,6 @@ struct virtio_scsi {
bool affinity_hint_set;
struct hlist_node node;
- struct hlist_node node_dead;
/* Protected by event_vq lock */
bool stop_events;
@@ -118,7 +119,6 @@ struct virtio_scsi {
struct virtio_scsi_vq req_vqs[];
};
-static enum cpuhp_state virtioscsi_online;
static struct kmem_cache *virtscsi_cmd_cache;
static mempool_t *virtscsi_cmd_pool;
@@ -766,6 +766,13 @@ static void virtscsi_target_destroy(struct scsi_target *starget)
kfree(tgt);
}
+static int virtscsi_map_queues(struct Scsi_Host *shost)
+{
+ struct virtio_scsi *vscsi = shost_priv(shost);
+
+ return blk_mq_virtio_map_queues(&shost->tag_set, vscsi->vdev, 2);
+}
+
static struct scsi_host_template virtscsi_host_template_single = {
.module = THIS_MODULE,
.name = "Virtio SCSI HBA",
@@ -801,6 +808,7 @@ static struct scsi_host_template virtscsi_host_template_multi = {
.use_clustering = ENABLE_CLUSTERING,
.target_alloc = virtscsi_target_alloc,
.target_destroy = virtscsi_target_destroy,
+ .map_queues = virtscsi_map_queues,
.track_queue_depth = 1,
};
@@ -817,80 +825,6 @@ static struct scsi_host_template virtscsi_host_template_multi = {
virtio_cwrite(vdev, struct virtio_scsi_config, fld, &__val); \
} while(0)
-static void __virtscsi_set_affinity(struct virtio_scsi *vscsi, bool affinity)
-{
- int i;
- int cpu;
-
- /* In multiqueue mode, when the number of cpu is equal
- * to the number of request queues, we let the qeueues
- * to be private to one cpu by setting the affinity hint
- * to eliminate the contention.
- */
- if ((vscsi->num_queues == 1 ||
- vscsi->num_queues != num_online_cpus()) && affinity) {
- if (vscsi->affinity_hint_set)
- affinity = false;
- else
- return;
- }
-
- if (affinity) {
- i = 0;
- for_each_online_cpu(cpu) {
- virtqueue_set_affinity(vscsi->req_vqs[i].vq, cpu);
- i++;
- }
-
- vscsi->affinity_hint_set = true;
- } else {
- for (i = 0; i < vscsi->num_queues; i++) {
- if (!vscsi->req_vqs[i].vq)
- continue;
-
- virtqueue_set_affinity(vscsi->req_vqs[i].vq, -1);
- }
-
- vscsi->affinity_hint_set = false;
- }
-}
-
-static void virtscsi_set_affinity(struct virtio_scsi *vscsi, bool affinity)
-{
- get_online_cpus();
- __virtscsi_set_affinity(vscsi, affinity);
- put_online_cpus();
-}
-
-static int virtscsi_cpu_online(unsigned int cpu, struct hlist_node *node)
-{
- struct virtio_scsi *vscsi = hlist_entry_safe(node, struct virtio_scsi,
- node);
- __virtscsi_set_affinity(vscsi, true);
- return 0;
-}
-
-static int virtscsi_cpu_notif_add(struct virtio_scsi *vi)
-{
- int ret;
-
- ret = cpuhp_state_add_instance(virtioscsi_online, &vi->node);
- if (ret)
- return ret;
-
- ret = cpuhp_state_add_instance(CPUHP_VIRT_SCSI_DEAD, &vi->node_dead);
- if (ret)
- cpuhp_state_remove_instance(virtioscsi_online, &vi->node);
- return ret;
-}
-
-static void virtscsi_cpu_notif_remove(struct virtio_scsi *vi)
-{
- cpuhp_state_remove_instance_nocalls(virtioscsi_online, &vi->node);
- cpuhp_state_remove_instance_nocalls(CPUHP_VIRT_SCSI_DEAD,
- &vi->node_dead);
-}
-
static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
struct virtqueue *vq)
{
@@ -900,14 +834,8 @@ static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
static void virtscsi_remove_vqs(struct virtio_device *vdev)
{
- struct Scsi_Host *sh = virtio_scsi_host(vdev);
- struct virtio_scsi *vscsi = shost_priv(sh);
-
- virtscsi_set_affinity(vscsi, false);
-
/* Stop all the virtqueues. */
vdev->config->reset(vdev);
-
vdev->config->del_vqs(vdev);
}
@@ -920,6 +848,7 @@ static int virtscsi_init(struct virtio_device *vdev,
vq_callback_t **callbacks;
const char **names;
struct virtqueue **vqs;
+ struct irq_affinity desc = { .pre_vectors = 2 };
num_vqs = vscsi->num_queues + VIRTIO_SCSI_VQ_BASE;
vqs = kmalloc(num_vqs * sizeof(struct virtqueue *), GFP_KERNEL);
@@ -941,7 +870,8 @@ static int virtscsi_init(struct virtio_device *vdev,
}
/* Discover virtqueues and write information to configuration. */
- err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names);
+ err = vdev->config->find_vqs(vdev, num_vqs, vqs, callbacks, names,
+ &desc);
if (err)
goto out;
@@ -1007,10 +937,6 @@ static int virtscsi_probe(struct virtio_device *vdev)
if (err)
goto virtscsi_init_failed;
- err = virtscsi_cpu_notif_add(vscsi);
- if (err)
- goto scsi_add_host_failed;
-
cmd_per_lun = virtscsi_config_get(vdev, cmd_per_lun) ?: 1;
shost->cmd_per_lun = min_t(u32, cmd_per_lun, shost->can_queue);
shost->max_sectors = virtscsi_config_get(vdev, max_sectors) ?: 0xFFFF;
@@ -1065,9 +991,6 @@ static void virtscsi_remove(struct virtio_device *vdev)
virtscsi_cancel_event_work(vscsi);
scsi_remove_host(shost);
-
- virtscsi_cpu_notif_remove(vscsi);
-
virtscsi_remove_vqs(vdev);
scsi_host_put(shost);
}
@@ -1075,10 +998,6 @@ static void virtscsi_remove(struct virtio_device *vdev)
#ifdef CONFIG_PM_SLEEP
static int virtscsi_freeze(struct virtio_device *vdev)
{
- struct Scsi_Host *sh = virtio_scsi_host(vdev);
- struct virtio_scsi *vscsi = shost_priv(sh);
-
- virtscsi_cpu_notif_remove(vscsi);
virtscsi_remove_vqs(vdev);
return 0;
}
@@ -1093,11 +1012,6 @@ static int virtscsi_restore(struct virtio_device *vdev)
if (err)
return err;
- err = virtscsi_cpu_notif_add(vscsi);
- if (err) {
- vdev->config->del_vqs(vdev);
- return err;
- }
virtio_device_ready(vdev);
if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG))
@@ -1152,16 +1066,6 @@ static int __init init(void)
pr_err("mempool_create() for virtscsi_cmd_pool failed\n");
goto error;
}
- ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN,
- "scsi/virtio:online",
- virtscsi_cpu_online, NULL);
- if (ret < 0)
- goto error;
- virtioscsi_online = ret;
- ret = cpuhp_setup_state_multi(CPUHP_VIRT_SCSI_DEAD, "scsi/virtio:dead",
- NULL, virtscsi_cpu_online);
- if (ret)
- goto error;
ret = register_virtio_driver(&virtio_scsi_driver);
if (ret < 0)
goto error;
@@ -1177,17 +1081,12 @@ static int __init init(void)
kmem_cache_destroy(virtscsi_cmd_cache);
virtscsi_cmd_cache = NULL;
}
- if (virtioscsi_online)
- cpuhp_remove_multi_state(virtioscsi_online);
- cpuhp_remove_multi_state(CPUHP_VIRT_SCSI_DEAD);
return ret;
}
static void __exit fini(void)
{
unregister_virtio_driver(&virtio_scsi_driver);
- cpuhp_remove_multi_state(virtioscsi_online);
- cpuhp_remove_multi_state(CPUHP_VIRT_SCSI_DEAD);
mempool_destroy(virtscsi_cmd_pool);
kmem_cache_destroy(virtscsi_cmd_cache);
}
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 4269e62..9469364 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -282,6 +282,22 @@ void vhost_poll_queue(struct vhost_poll *poll)
}
EXPORT_SYMBOL_GPL(vhost_poll_queue);
+static void __vhost_vq_meta_reset(struct vhost_virtqueue *vq)
+{
+ int j;
+
+ for (j = 0; j < VHOST_NUM_ADDRS; j++)
+ vq->meta_iotlb[j] = NULL;
+}
+
+static void vhost_vq_meta_reset(struct vhost_dev *d)
+{
+ int i;
+
+ for (i = 0; i < d->nvqs; ++i)
+ __vhost_vq_meta_reset(d->vqs[i]);
+}
+
static void vhost_vq_reset(struct vhost_dev *dev,
struct vhost_virtqueue *vq)
{
@@ -312,6 +328,7 @@ static void vhost_vq_reset(struct vhost_dev *dev,
vq->busyloop_timeout = 0;
vq->umem = NULL;
vq->iotlb = NULL;
+ __vhost_vq_meta_reset(vq);
}
static int vhost_worker(void *data)
@@ -691,6 +708,18 @@ static int vq_memory_access_ok(void __user *log_base, struct vhost_umem *umem,
return 1;
}
+static inline void __user *vhost_vq_meta_fetch(struct vhost_virtqueue *vq,
+ u64 addr, unsigned int size,
+ int type)
+{
+ const struct vhost_umem_node *node = vq->meta_iotlb[type];
+
+ if (!node)
+ return NULL;
+
+ return (void *)(uintptr_t)(node->userspace_addr + addr - node->start);
+}
+
/* Can we switch to this memory table? */
/* Caller should have device mutex but not vq mutex */
static int memory_access_ok(struct vhost_dev *d, struct vhost_umem *umem,
@@ -733,8 +762,14 @@ static int vhost_copy_to_user(struct vhost_virtqueue *vq, void __user *to,
* could be access through iotlb. So -EAGAIN should
* not happen in this case.
*/
- /* TODO: more fast path */
struct iov_iter t;
+ void __user *uaddr = vhost_vq_meta_fetch(vq,
+ (u64)(uintptr_t)to, size,
+ VHOST_ADDR_DESC);
+
+ if (uaddr)
+ return __copy_to_user(uaddr, from, size);
+
ret = translate_desc(vq, (u64)(uintptr_t)to, size, vq->iotlb_iov,
ARRAY_SIZE(vq->iotlb_iov),
VHOST_ACCESS_WO);
@@ -762,8 +797,14 @@ static int vhost_copy_from_user(struct vhost_virtqueue *vq, void *to,
* could be access through iotlb. So -EAGAIN should
* not happen in this case.
*/
- /* TODO: more fast path */
+ void __user *uaddr = vhost_vq_meta_fetch(vq,
+ (u64)(uintptr_t)from, size,
+ VHOST_ADDR_DESC);
struct iov_iter f;
+
+ if (uaddr)
+ return __copy_from_user(to, uaddr, size);
+
ret = translate_desc(vq, (u64)(uintptr_t)from, size, vq->iotlb_iov,
ARRAY_SIZE(vq->iotlb_iov),
VHOST_ACCESS_RO);
@@ -783,17 +824,12 @@ static int vhost_copy_from_user(struct vhost_virtqueue *vq, void *to,
return ret;
}
-static void __user *__vhost_get_user(struct vhost_virtqueue *vq,
- void __user *addr, unsigned size)
+static void __user *__vhost_get_user_slow(struct vhost_virtqueue *vq,
+ void __user *addr, unsigned int size,
+ int type)
{
int ret;
- /* This function should be called after iotlb
- * prefetch, which means we're sure that vq
- * could be access through iotlb. So -EAGAIN should
- * not happen in this case.
- */
- /* TODO: more fast path */
ret = translate_desc(vq, (u64)(uintptr_t)addr, size, vq->iotlb_iov,
ARRAY_SIZE(vq->iotlb_iov),
VHOST_ACCESS_RO);
@@ -814,14 +850,32 @@ static void __user *__vhost_get_user(struct vhost_virtqueue *vq,
return vq->iotlb_iov[0].iov_base;
}
-#define vhost_put_user(vq, x, ptr) \
+/* This function should be called after iotlb
+ * prefetch, which means we're sure that vq
+ * could be access through iotlb. So -EAGAIN should
+ * not happen in this case.
+ */
+static inline void __user *__vhost_get_user(struct vhost_virtqueue *vq,
+ void *addr, unsigned int size,
+ int type)
+{
+ void __user *uaddr = vhost_vq_meta_fetch(vq,
+ (u64)(uintptr_t)addr, size, type);
+ if (uaddr)
+ return uaddr;
+
+ return __vhost_get_user_slow(vq, addr, size, type);
+}
+
+#define vhost_put_user(vq, x, ptr) \
({ \
int ret = -EFAULT; \
if (!vq->iotlb) { \
ret = __put_user(x, ptr); \
} else { \
__typeof__(ptr) to = \
- (__typeof__(ptr)) __vhost_get_user(vq, ptr, sizeof(*ptr)); \
+ (__typeof__(ptr)) __vhost_get_user(vq, ptr, \
+ sizeof(*ptr), VHOST_ADDR_USED); \
if (to != NULL) \
ret = __put_user(x, to); \
else \
@@ -830,14 +884,16 @@ static void __user *__vhost_get_user(struct vhost_virtqueue *vq,
ret; \
})
-#define vhost_get_user(vq, x, ptr) \
+#define vhost_get_user(vq, x, ptr, type) \
({ \
int ret; \
if (!vq->iotlb) { \
ret = __get_user(x, ptr); \
} else { \
__typeof__(ptr) from = \
- (__typeof__(ptr)) __vhost_get_user(vq, ptr, sizeof(*ptr)); \
+ (__typeof__(ptr)) __vhost_get_user(vq, ptr, \
+ sizeof(*ptr), \
+ type); \
if (from != NULL) \
ret = __get_user(x, from); \
else \
@@ -846,6 +902,12 @@ static void __user *__vhost_get_user(struct vhost_virtqueue *vq,
ret; \
})
+#define vhost_get_avail(vq, x, ptr) \
+ vhost_get_user(vq, x, ptr, VHOST_ADDR_AVAIL)
+
+#define vhost_get_used(vq, x, ptr) \
+ vhost_get_user(vq, x, ptr, VHOST_ADDR_USED)
+
static void vhost_dev_lock_vqs(struct vhost_dev *d)
{
int i = 0;
@@ -951,6 +1013,7 @@ static int vhost_process_iotlb_msg(struct vhost_dev *dev,
ret = -EFAULT;
break;
}
+ vhost_vq_meta_reset(dev);
if (vhost_new_umem_range(dev->iotlb, msg->iova, msg->size,
msg->iova + msg->size - 1,
msg->uaddr, msg->perm)) {
@@ -960,6 +1023,7 @@ static int vhost_process_iotlb_msg(struct vhost_dev *dev,
vhost_iotlb_notify_vq(dev, msg);
break;
case VHOST_IOTLB_INVALIDATE:
+ vhost_vq_meta_reset(dev);
vhost_del_umem_range(dev->iotlb, msg->iova,
msg->iova + msg->size - 1);
break;
@@ -1103,12 +1167,26 @@ static int vq_access_ok(struct vhost_virtqueue *vq, unsigned int num,
sizeof *used + num * sizeof *used->ring + s);
}
+static void vhost_vq_meta_update(struct vhost_virtqueue *vq,
+ const struct vhost_umem_node *node,
+ int type)
+{
+ int access = (type == VHOST_ADDR_USED) ?
+ VHOST_ACCESS_WO : VHOST_ACCESS_RO;
+
+ if (likely(node->perm & access))
+ vq->meta_iotlb[type] = node;
+}
+
static int iotlb_access_ok(struct vhost_virtqueue *vq,
- int access, u64 addr, u64 len)
+ int access, u64 addr, u64 len, int type)
{
const struct vhost_umem_node *node;
struct vhost_umem *umem = vq->iotlb;
- u64 s = 0, size;
+ u64 s = 0, size, orig_addr = addr;
+
+ if (vhost_vq_meta_fetch(vq, addr, len, type))
+ return true;
while (len > s) {
node = vhost_umem_interval_tree_iter_first(&umem->umem_tree,
@@ -1125,6 +1203,10 @@ static int iotlb_access_ok(struct vhost_virtqueue *vq,
}
size = node->size - addr + node->start;
+
+ if (orig_addr == addr && size >= len)
+ vhost_vq_meta_update(vq, node, type);
+
s += size;
addr += size;
}
@@ -1141,13 +1223,15 @@ int vq_iotlb_prefetch(struct vhost_virtqueue *vq)
return 1;
return iotlb_access_ok(vq, VHOST_ACCESS_RO, (u64)(uintptr_t)vq->desc,
- num * sizeof *vq->desc) &&
+ num * sizeof(*vq->desc), VHOST_ADDR_DESC) &&
iotlb_access_ok(vq, VHOST_ACCESS_RO, (u64)(uintptr_t)vq->avail,
sizeof *vq->avail +
- num * sizeof *vq->avail->ring + s) &&
+ num * sizeof(*vq->avail->ring) + s,
+ VHOST_ADDR_AVAIL) &&
iotlb_access_ok(vq, VHOST_ACCESS_WO, (u64)(uintptr_t)vq->used,
sizeof *vq->used +
- num * sizeof *vq->used->ring + s);
+ num * sizeof(*vq->used->ring) + s,
+ VHOST_ADDR_USED);
}
EXPORT_SYMBOL_GPL(vq_iotlb_prefetch);
@@ -1728,7 +1812,7 @@ int vhost_vq_init_access(struct vhost_virtqueue *vq)
r = -EFAULT;
goto err;
}
- r = vhost_get_user(vq, last_used_idx, &vq->used->idx);
+ r = vhost_get_used(vq, last_used_idx, &vq->used->idx);
if (r) {
vq_err(vq, "Can't access used idx at %p\n",
&vq->used->idx);
@@ -1930,29 +2014,36 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
/* Check it isn't doing very strange things with descriptor numbers. */
last_avail_idx = vq->last_avail_idx;
- if (unlikely(vhost_get_user(vq, avail_idx, &vq->avail->idx))) {
- vq_err(vq, "Failed to access avail idx at %p\n",
- &vq->avail->idx);
- return -EFAULT;
+
+ if (vq->avail_idx == vq->last_avail_idx) {
+ if (unlikely(vhost_get_avail(vq, avail_idx, &vq->avail->idx))) {
+ vq_err(vq, "Failed to access avail idx at %p\n",
+ &vq->avail->idx);
+ return -EFAULT;
+ }
+ vq->avail_idx = vhost16_to_cpu(vq, avail_idx);
+
+ if (unlikely((u16)(vq->avail_idx - last_avail_idx) > vq->num)) {
+ vq_err(vq, "Guest moved used index from %u to %u",
+ last_avail_idx, vq->avail_idx);
+ return -EFAULT;
+ }
+
+ /* If there's nothing new since last we looked, return
+ * invalid.
+ */
+ if (vq->avail_idx == last_avail_idx)
+ return vq->num;
+
+ /* Only get avail ring entries after they have been
+ * exposed by guest.
+ */
+ smp_rmb();
}
- vq->avail_idx = vhost16_to_cpu(vq, avail_idx);
-
- if (unlikely((u16)(vq->avail_idx - last_avail_idx) > vq->num)) {
- vq_err(vq, "Guest moved used index from %u to %u",
- last_avail_idx, vq->avail_idx);
- return -EFAULT;
- }
-
- /* If there's nothing new since last we looked, return invalid. */
- if (vq->avail_idx == last_avail_idx)
- return vq->num;
-
- /* Only get avail ring entries after they have been exposed by guest. */
- smp_rmb();
/* Grab the next descriptor number they're advertising, and increment
* the index we've seen. */
- if (unlikely(vhost_get_user(vq, ring_head,
+ if (unlikely(vhost_get_avail(vq, ring_head,
&vq->avail->ring[last_avail_idx & (vq->num - 1)]))) {
vq_err(vq, "Failed to read head: idx %d address %p\n",
last_avail_idx,
@@ -2168,7 +2259,7 @@ static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
* with the barrier that the Guest executes when enabling
* interrupts. */
smp_mb();
- if (vhost_get_user(vq, flags, &vq->avail->flags)) {
+ if (vhost_get_avail(vq, flags, &vq->avail->flags)) {
vq_err(vq, "Failed to get flags");
return true;
}
@@ -2195,7 +2286,7 @@ static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
* interrupts. */
smp_mb();
- if (vhost_get_user(vq, event, vhost_used_event(vq))) {
+ if (vhost_get_avail(vq, event, vhost_used_event(vq))) {
vq_err(vq, "Failed to get used event idx");
return true;
}
@@ -2242,7 +2333,7 @@ bool vhost_vq_avail_empty(struct vhost_dev *dev, struct vhost_virtqueue *vq)
if (vq->avail_idx != vq->last_avail_idx)
return false;
- r = vhost_get_user(vq, avail_idx, &vq->avail->idx);
+ r = vhost_get_avail(vq, avail_idx, &vq->avail->idx);
if (unlikely(r))
return false;
vq->avail_idx = vhost16_to_cpu(vq, avail_idx);
@@ -2278,7 +2369,7 @@ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
/* They could have slipped one in as we were doing that: make
* sure it's written, then check again. */
smp_mb();
- r = vhost_get_user(vq, avail_idx, &vq->avail->idx);
+ r = vhost_get_avail(vq, avail_idx, &vq->avail->idx);
if (r) {
vq_err(vq, "Failed to check avail idx at %p: %d\n",
&vq->avail->idx, r);
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index a9cbbb1..f55671d 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -76,6 +76,13 @@ struct vhost_umem {
int numem;
};
+enum vhost_uaddr_type {
+ VHOST_ADDR_DESC = 0,
+ VHOST_ADDR_AVAIL = 1,
+ VHOST_ADDR_USED = 2,
+ VHOST_NUM_ADDRS = 3,
+};
+
/* The virtqueue structure describes a queue attached to a device. */
struct vhost_virtqueue {
struct vhost_dev *dev;
@@ -86,6 +93,7 @@ struct vhost_virtqueue {
struct vring_desc __user *desc;
struct vring_avail __user *avail;
struct vring_used __user *used;
+ const struct vhost_umem_node *meta_iotlb[VHOST_NUM_ADDRS];
struct file *kick;
struct file *call;
struct file *error;
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 9d2738e9..a2a4386 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -413,7 +413,8 @@ static int init_vqs(struct virtio_balloon *vb)
* optionally stat.
*/
nvqs = virtio_has_feature(vb->vdev, VIRTIO_BALLOON_F_STATS_VQ) ? 3 : 2;
- err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names);
+ err = vb->vdev->config->find_vqs(vb->vdev, nvqs, vqs, callbacks, names,
+ NULL);
if (err)
return err;
diff --git a/drivers/virtio/virtio_input.c b/drivers/virtio/virtio_input.c
index 350a2a5..79f1293 100644
--- a/drivers/virtio/virtio_input.c
+++ b/drivers/virtio/virtio_input.c
@@ -173,7 +173,8 @@ static int virtinput_init_vqs(struct virtio_input *vi)
static const char * const names[] = { "events", "status" };
int err;
- err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names);
+ err = vi->vdev->config->find_vqs(vi->vdev, 2, vqs, cbs, names,
+ NULL);
if (err)
return err;
vi->evt = vqs[0];
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
index c71fde5..78343b8 100644
--- a/drivers/virtio/virtio_mmio.c
+++ b/drivers/virtio/virtio_mmio.c
@@ -70,7 +70,7 @@
#include <linux/spinlock.h>
#include <linux/virtio.h>
#include <linux/virtio_config.h>
-#include <linux/virtio_mmio.h>
+#include <uapi/linux/virtio_mmio.h>
#include <linux/virtio_ring.h>
@@ -446,7 +446,8 @@ static struct virtqueue *vm_setup_vq(struct virtio_device *vdev, unsigned index,
static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
struct virtqueue *vqs[],
vq_callback_t *callbacks[],
- const char * const names[])
+ const char * const names[],
+ struct irq_affinity *desc)
{
struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
unsigned int irq = platform_get_irq(vm_dev->pdev, 0);
diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
index 186cbab..df548a6 100644
--- a/drivers/virtio/virtio_pci_common.c
+++ b/drivers/virtio/virtio_pci_common.c
@@ -33,10 +33,8 @@ void vp_synchronize_vectors(struct virtio_device *vdev)
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
int i;
- if (vp_dev->intx_enabled)
- synchronize_irq(vp_dev->pci_dev->irq);
-
- for (i = 0; i < vp_dev->msix_vectors; ++i)
+ synchronize_irq(pci_irq_vector(vp_dev->pci_dev, 0));
+ for (i = 1; i < vp_dev->msix_vectors; i++)
synchronize_irq(pci_irq_vector(vp_dev->pci_dev, i));
}
@@ -62,16 +60,13 @@ static irqreturn_t vp_config_changed(int irq, void *opaque)
static irqreturn_t vp_vring_interrupt(int irq, void *opaque)
{
struct virtio_pci_device *vp_dev = opaque;
- struct virtio_pci_vq_info *info;
irqreturn_t ret = IRQ_NONE;
- unsigned long flags;
+ struct virtqueue *vq;
- spin_lock_irqsave(&vp_dev->lock, flags);
- list_for_each_entry(info, &vp_dev->virtqueues, node) {
- if (vring_interrupt(irq, info->vq) == IRQ_HANDLED)
+ list_for_each_entry(vq, &vp_dev->vdev.vqs, list) {
+ if (vq->callback && vring_interrupt(irq, vq) == IRQ_HANDLED)
ret = IRQ_HANDLED;
}
- spin_unlock_irqrestore(&vp_dev->lock, flags);
return ret;
}
@@ -102,237 +97,185 @@ static irqreturn_t vp_interrupt(int irq, void *opaque)
return vp_vring_interrupt(irq, opaque);
}
-static int vp_request_msix_vectors(struct virtio_device *vdev, int nvectors,
- bool per_vq_vectors)
+static void vp_remove_vqs(struct virtio_device *vdev)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- const char *name = dev_name(&vp_dev->vdev.dev);
- unsigned i, v;
- int err = -ENOMEM;
+ struct virtqueue *vq, *n;
- vp_dev->msix_vectors = nvectors;
+ list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
+ if (vp_dev->msix_vector_map) {
+ int v = vp_dev->msix_vector_map[vq->index];
- vp_dev->msix_names = kmalloc(nvectors * sizeof *vp_dev->msix_names,
- GFP_KERNEL);
- if (!vp_dev->msix_names)
- goto error;
- vp_dev->msix_affinity_masks
- = kzalloc(nvectors * sizeof *vp_dev->msix_affinity_masks,
- GFP_KERNEL);
- if (!vp_dev->msix_affinity_masks)
- goto error;
- for (i = 0; i < nvectors; ++i)
- if (!alloc_cpumask_var(&vp_dev->msix_affinity_masks[i],
- GFP_KERNEL))
- goto error;
-
- err = pci_alloc_irq_vectors(vp_dev->pci_dev, nvectors, nvectors,
- PCI_IRQ_MSIX);
- if (err < 0)
- goto error;
- vp_dev->msix_enabled = 1;
-
- /* Set the vector used for configuration */
- v = vp_dev->msix_used_vectors;
- snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
- "%s-config", name);
- err = request_irq(pci_irq_vector(vp_dev->pci_dev, v),
- vp_config_changed, 0, vp_dev->msix_names[v],
- vp_dev);
- if (err)
- goto error;
- ++vp_dev->msix_used_vectors;
-
- v = vp_dev->config_vector(vp_dev, v);
- /* Verify we had enough resources to assign the vector */
- if (v == VIRTIO_MSI_NO_VECTOR) {
- err = -EBUSY;
- goto error;
+ if (v != VIRTIO_MSI_NO_VECTOR)
+ free_irq(pci_irq_vector(vp_dev->pci_dev, v),
+ vq);
+ }
+ vp_dev->del_vq(vq);
}
-
- if (!per_vq_vectors) {
- /* Shared vector for all VQs */
- v = vp_dev->msix_used_vectors;
- snprintf(vp_dev->msix_names[v], sizeof *vp_dev->msix_names,
- "%s-virtqueues", name);
- err = request_irq(pci_irq_vector(vp_dev->pci_dev, v),
- vp_vring_interrupt, 0, vp_dev->msix_names[v],
- vp_dev);
- if (err)
- goto error;
- ++vp_dev->msix_used_vectors;
- }
- return 0;
-error:
- return err;
-}
-
-static struct virtqueue *vp_setup_vq(struct virtio_device *vdev, unsigned index,
- void (*callback)(struct virtqueue *vq),
- const char *name,
- u16 msix_vec)
-{
- struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtio_pci_vq_info *info = kmalloc(sizeof *info, GFP_KERNEL);
- struct virtqueue *vq;
- unsigned long flags;
-
- /* fill out our structure that represents an active queue */
- if (!info)
- return ERR_PTR(-ENOMEM);
-
- vq = vp_dev->setup_vq(vp_dev, info, index, callback, name, msix_vec);
- if (IS_ERR(vq))
- goto out_info;
-
- info->vq = vq;
- if (callback) {
- spin_lock_irqsave(&vp_dev->lock, flags);
- list_add(&info->node, &vp_dev->virtqueues);
- spin_unlock_irqrestore(&vp_dev->lock, flags);
- } else {
- INIT_LIST_HEAD(&info->node);
- }
-
- vp_dev->vqs[index] = info;
- return vq;
-
-out_info:
- kfree(info);
- return vq;
-}
-
-static void vp_del_vq(struct virtqueue *vq)
-{
- struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
- struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
- unsigned long flags;
-
- spin_lock_irqsave(&vp_dev->lock, flags);
- list_del(&info->node);
- spin_unlock_irqrestore(&vp_dev->lock, flags);
-
- vp_dev->del_vq(info);
- kfree(info);
}
/* the config->del_vqs() implementation */
void vp_del_vqs(struct virtio_device *vdev)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtqueue *vq, *n;
int i;
- list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
- if (vp_dev->per_vq_vectors) {
- int v = vp_dev->vqs[vq->index]->msix_vector;
+ if (WARN_ON_ONCE(list_empty_careful(&vdev->vqs)))
+ return;
- if (v != VIRTIO_MSI_NO_VECTOR)
- free_irq(pci_irq_vector(vp_dev->pci_dev, v),
- vq);
- }
- vp_del_vq(vq);
- }
- vp_dev->per_vq_vectors = false;
+ vp_remove_vqs(vdev);
- if (vp_dev->intx_enabled) {
- free_irq(vp_dev->pci_dev->irq, vp_dev);
- vp_dev->intx_enabled = 0;
- }
-
- for (i = 0; i < vp_dev->msix_used_vectors; ++i)
- free_irq(pci_irq_vector(vp_dev->pci_dev, i), vp_dev);
-
- for (i = 0; i < vp_dev->msix_vectors; i++)
- if (vp_dev->msix_affinity_masks[i])
+ if (vp_dev->pci_dev->msix_enabled) {
+ for (i = 0; i < vp_dev->msix_vectors; i++)
free_cpumask_var(vp_dev->msix_affinity_masks[i]);
- if (vp_dev->msix_enabled) {
/* Disable the vector used for configuration */
vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR);
- pci_free_irq_vectors(vp_dev->pci_dev);
- vp_dev->msix_enabled = 0;
+ kfree(vp_dev->msix_affinity_masks);
+ kfree(vp_dev->msix_names);
+ kfree(vp_dev->msix_vector_map);
}
- vp_dev->msix_vectors = 0;
- vp_dev->msix_used_vectors = 0;
- kfree(vp_dev->msix_names);
- vp_dev->msix_names = NULL;
- kfree(vp_dev->msix_affinity_masks);
- vp_dev->msix_affinity_masks = NULL;
- kfree(vp_dev->vqs);
- vp_dev->vqs = NULL;
+ free_irq(pci_irq_vector(vp_dev->pci_dev, 0), vp_dev);
+ pci_free_irq_vectors(vp_dev->pci_dev);
}
static int vp_find_vqs_msix(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[],
- bool per_vq_vectors)
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+ const char *name = dev_name(&vp_dev->vdev.dev);
+ int i, err = -ENOMEM, allocated_vectors, nvectors;
+ unsigned flags = PCI_IRQ_MSIX;
+ bool shared = false;
u16 msix_vec;
- int i, err, nvectors, allocated_vectors;
- vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
- if (!vp_dev->vqs)
- return -ENOMEM;
-
- if (per_vq_vectors) {
- /* Best option: one for change interrupt, one per vq. */
- nvectors = 1;
- for (i = 0; i < nvqs; ++i)
- if (callbacks[i])
- ++nvectors;
- } else {
- /* Second best: one for change, shared for all vqs. */
- nvectors = 2;
+ if (desc) {
+ flags |= PCI_IRQ_AFFINITY;
+ desc->pre_vectors++; /* virtio config vector */
}
- err = vp_request_msix_vectors(vdev, nvectors, per_vq_vectors);
- if (err)
- goto error_find;
+ nvectors = 1;
+ for (i = 0; i < nvqs; i++)
+ if (callbacks[i])
+ nvectors++;
- vp_dev->per_vq_vectors = per_vq_vectors;
- allocated_vectors = vp_dev->msix_used_vectors;
+ /* Try one vector per queue first. */
+ err = pci_alloc_irq_vectors_affinity(vp_dev->pci_dev, nvectors,
+ nvectors, flags, desc);
+ if (err < 0) {
+ /* Fallback to one vector for config, one shared for queues. */
+ shared = true;
+ err = pci_alloc_irq_vectors(vp_dev->pci_dev, 2, 2,
+ PCI_IRQ_MSIX);
+ if (err < 0)
+ return err;
+ }
+ if (err < 0)
+ return err;
+
+ vp_dev->msix_vectors = nvectors;
+ vp_dev->msix_names = kmalloc_array(nvectors,
+ sizeof(*vp_dev->msix_names), GFP_KERNEL);
+ if (!vp_dev->msix_names)
+ goto out_free_irq_vectors;
+
+ vp_dev->msix_affinity_masks = kcalloc(nvectors,
+ sizeof(*vp_dev->msix_affinity_masks), GFP_KERNEL);
+ if (!vp_dev->msix_affinity_masks)
+ goto out_free_msix_names;
+
+ for (i = 0; i < nvectors; ++i) {
+ if (!alloc_cpumask_var(&vp_dev->msix_affinity_masks[i],
+ GFP_KERNEL))
+ goto out_free_msix_affinity_masks;
+ }
+
+ /* Set the vector used for configuration */
+ snprintf(vp_dev->msix_names[0], sizeof(*vp_dev->msix_names),
+ "%s-config", name);
+ err = request_irq(pci_irq_vector(vp_dev->pci_dev, 0), vp_config_changed,
+ 0, vp_dev->msix_names[0], vp_dev);
+ if (err)
+ goto out_free_msix_affinity_masks;
+
+ /* Verify we had enough resources to assign the vector */
+ if (vp_dev->config_vector(vp_dev, 0) == VIRTIO_MSI_NO_VECTOR) {
+ err = -EBUSY;
+ goto out_free_config_irq;
+ }
+
+ vp_dev->msix_vector_map = kmalloc_array(nvqs,
+ sizeof(*vp_dev->msix_vector_map), GFP_KERNEL);
+ if (!vp_dev->msix_vector_map)
+ goto out_disable_config_irq;
+
+ allocated_vectors = 1; /* vector 0 is the config interrupt */
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
vqs[i] = NULL;
continue;
}
- if (!callbacks[i])
- msix_vec = VIRTIO_MSI_NO_VECTOR;
- else if (vp_dev->per_vq_vectors)
- msix_vec = allocated_vectors++;
+ if (callbacks[i])
+ msix_vec = allocated_vectors;
else
- msix_vec = VP_MSIX_VQ_VECTOR;
- vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i], msix_vec);
+ msix_vec = VIRTIO_MSI_NO_VECTOR;
+
+ vqs[i] = vp_dev->setup_vq(vp_dev, i, callbacks[i], names[i],
+ msix_vec);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
- goto error_find;
+ goto out_remove_vqs;
}
- if (!vp_dev->per_vq_vectors || msix_vec == VIRTIO_MSI_NO_VECTOR)
+ if (msix_vec == VIRTIO_MSI_NO_VECTOR) {
+ vp_dev->msix_vector_map[i] = VIRTIO_MSI_NO_VECTOR;
continue;
+ }
- /* allocate per-vq irq if available and necessary */
- snprintf(vp_dev->msix_names[msix_vec],
- sizeof *vp_dev->msix_names,
- "%s-%s",
+ snprintf(vp_dev->msix_names[i + 1],
+ sizeof(*vp_dev->msix_names), "%s-%s",
dev_name(&vp_dev->vdev.dev), names[i]);
err = request_irq(pci_irq_vector(vp_dev->pci_dev, msix_vec),
- vring_interrupt, 0,
- vp_dev->msix_names[msix_vec],
- vqs[i]);
- if (err)
- goto error_find;
+ vring_interrupt, IRQF_SHARED,
+ vp_dev->msix_names[i + 1], vqs[i]);
+ if (err) {
+ /* don't free this irq on error */
+ vp_dev->msix_vector_map[i] = VIRTIO_MSI_NO_VECTOR;
+ goto out_remove_vqs;
+ }
+ vp_dev->msix_vector_map[i] = msix_vec;
+
+ /*
+ * Use a different vector for each queue if they are available,
+ * else share the same vector for all VQs.
+ */
+ if (!shared)
+ allocated_vectors++;
}
+
return 0;
-error_find:
- vp_del_vqs(vdev);
+out_remove_vqs:
+ vp_remove_vqs(vdev);
+ kfree(vp_dev->msix_vector_map);
+out_disable_config_irq:
+ vp_dev->config_vector(vp_dev, VIRTIO_MSI_NO_VECTOR);
+out_free_config_irq:
+ free_irq(pci_irq_vector(vp_dev->pci_dev, 0), vp_dev);
+out_free_msix_affinity_masks:
+ for (i = 0; i < nvectors; i++) {
+ if (vp_dev->msix_affinity_masks[i])
+ free_cpumask_var(vp_dev->msix_affinity_masks[i]);
+ }
+ kfree(vp_dev->msix_affinity_masks);
+out_free_msix_names:
+ kfree(vp_dev->msix_names);
+out_free_irq_vectors:
+ pci_free_irq_vectors(vp_dev->pci_dev);
return err;
}
@@ -343,53 +286,42 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs,
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
int i, err;
- vp_dev->vqs = kcalloc(nvqs, sizeof(*vp_dev->vqs), GFP_KERNEL);
- if (!vp_dev->vqs)
- return -ENOMEM;
-
err = request_irq(vp_dev->pci_dev->irq, vp_interrupt, IRQF_SHARED,
dev_name(&vdev->dev), vp_dev);
if (err)
- goto out_del_vqs;
+ return err;
- vp_dev->intx_enabled = 1;
- vp_dev->per_vq_vectors = false;
for (i = 0; i < nvqs; ++i) {
if (!names[i]) {
vqs[i] = NULL;
continue;
}
- vqs[i] = vp_setup_vq(vdev, i, callbacks[i], names[i],
+ vqs[i] = vp_dev->setup_vq(vp_dev, i, callbacks[i], names[i],
VIRTIO_MSI_NO_VECTOR);
if (IS_ERR(vqs[i])) {
err = PTR_ERR(vqs[i]);
- goto out_del_vqs;
+ goto out_remove_vqs;
}
}
return 0;
-out_del_vqs:
- vp_del_vqs(vdev);
+
+out_remove_vqs:
+ vp_remove_vqs(vdev);
+ free_irq(pci_irq_vector(vp_dev->pci_dev, 0), vp_dev);
return err;
}
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc)
{
int err;
- /* Try MSI-X with one vector per queue. */
- err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, true);
+ err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, desc);
if (!err)
return 0;
- /* Fallback: MSI-X with one vector for config, one shared for queues. */
- err = vp_find_vqs_msix(vdev, nvqs, vqs, callbacks, names, false);
- if (!err)
- return 0;
- /* Finally fall back to regular interrupts. */
return vp_find_vqs_intx(vdev, nvqs, vqs, callbacks, names);
}
@@ -409,16 +341,15 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
{
struct virtio_device *vdev = vq->vdev;
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
- struct virtio_pci_vq_info *info = vp_dev->vqs[vq->index];
- struct cpumask *mask;
- unsigned int irq;
if (!vq->callback)
return -EINVAL;
- if (vp_dev->msix_enabled) {
- mask = vp_dev->msix_affinity_masks[info->msix_vector];
- irq = pci_irq_vector(vp_dev->pci_dev, info->msix_vector);
+ if (vp_dev->pci_dev->msix_enabled) {
+ int vec = vp_dev->msix_vector_map[vq->index];
+ struct cpumask *mask = vp_dev->msix_affinity_masks[vec];
+ unsigned int irq = pci_irq_vector(vp_dev->pci_dev, vec);
+
if (cpu == -1)
irq_set_affinity_hint(irq, NULL);
else {
@@ -430,6 +361,17 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu)
return 0;
}
+const struct cpumask *vp_get_vq_affinity(struct virtio_device *vdev, int index)
+{
+ struct virtio_pci_device *vp_dev = to_vp_device(vdev);
+ unsigned int *map = vp_dev->msix_vector_map;
+
+ if (!map || map[index] == VIRTIO_MSI_NO_VECTOR)
+ return NULL;
+
+ return pci_irq_get_affinity(vp_dev->pci_dev, map[index]);
+}
+
#ifdef CONFIG_PM_SLEEP
static int virtio_pci_freeze(struct device *dev)
{
@@ -498,8 +440,6 @@ static int virtio_pci_probe(struct pci_dev *pci_dev,
vp_dev->vdev.dev.parent = &pci_dev->dev;
vp_dev->vdev.dev.release = virtio_pci_release_dev;
vp_dev->pci_dev = pci_dev;
- INIT_LIST_HEAD(&vp_dev->virtqueues);
- spin_lock_init(&vp_dev->lock);
/* enable the device */
rc = pci_enable_device(pci_dev);
diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
index b2f66625..ac8c9d7 100644
--- a/drivers/virtio/virtio_pci_common.h
+++ b/drivers/virtio/virtio_pci_common.h
@@ -31,17 +31,6 @@
#include <linux/highmem.h>
#include <linux/spinlock.h>
-struct virtio_pci_vq_info {
- /* the actual virtqueue */
- struct virtqueue *vq;
-
- /* the list node for the virtqueues list */
- struct list_head node;
-
- /* MSI-X vector (or none) */
- unsigned msix_vector;
-};
-
/* Our device structure */
struct virtio_pci_device {
struct virtio_device vdev;
@@ -75,47 +64,25 @@ struct virtio_pci_device {
/* the IO mapping for the PCI config space */
void __iomem *ioaddr;
- /* a list of queues so we can dispatch IRQs */
- spinlock_t lock;
- struct list_head virtqueues;
-
- /* array of all queues for house-keeping */
- struct virtio_pci_vq_info **vqs;
-
- /* MSI-X support */
- int msix_enabled;
- int intx_enabled;
cpumask_var_t *msix_affinity_masks;
/* Name strings for interrupts. This size should be enough,
* and I'm too lazy to allocate each name separately. */
char (*msix_names)[256];
- /* Number of available vectors */
- unsigned msix_vectors;
- /* Vectors allocated, excluding per-vq vectors if any */
- unsigned msix_used_vectors;
-
- /* Whether we have vector per vq */
- bool per_vq_vectors;
+ /* Total Number of MSI-X vectors (including per-VQ ones). */
+ int msix_vectors;
+ /* Map of per-VQ MSI-X vectors, may be NULL */
+ unsigned *msix_vector_map;
struct virtqueue *(*setup_vq)(struct virtio_pci_device *vp_dev,
- struct virtio_pci_vq_info *info,
unsigned idx,
void (*callback)(struct virtqueue *vq),
const char *name,
u16 msix_vec);
- void (*del_vq)(struct virtio_pci_vq_info *info);
+ void (*del_vq)(struct virtqueue *vq);
u16 (*config_vector)(struct virtio_pci_device *vp_dev, u16 vector);
};
-/* Constants for MSI-X */
-/* Use first vector for configuration changes, second and the rest for
- * virtqueues Thus, we need at least 2 vectors for MSI. */
-enum {
- VP_MSIX_CONFIG_VECTOR = 0,
- VP_MSIX_VQ_VECTOR = 1,
-};
-
/* Convert a generic virtio device to our structure */
static struct virtio_pci_device *to_vp_device(struct virtio_device *vdev)
{
@@ -130,9 +97,8 @@ bool vp_notify(struct virtqueue *vq);
void vp_del_vqs(struct virtio_device *vdev);
/* the config->find_vqs() implementation */
int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[]);
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc);
const char *vp_bus_name(struct virtio_device *vdev);
/* Setup the affinity for a virtqueue:
@@ -142,6 +108,8 @@ const char *vp_bus_name(struct virtio_device *vdev);
*/
int vp_set_vq_affinity(struct virtqueue *vq, int cpu);
+const struct cpumask *vp_get_vq_affinity(struct virtio_device *vdev, int index);
+
#if IS_ENABLED(CONFIG_VIRTIO_PCI_LEGACY)
int virtio_pci_legacy_probe(struct virtio_pci_device *);
void virtio_pci_legacy_remove(struct virtio_pci_device *);
diff --git a/drivers/virtio/virtio_pci_legacy.c b/drivers/virtio/virtio_pci_legacy.c
index 6d9e517..f7362c5 100644
--- a/drivers/virtio/virtio_pci_legacy.c
+++ b/drivers/virtio/virtio_pci_legacy.c
@@ -112,7 +112,6 @@ static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
}
static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
- struct virtio_pci_vq_info *info,
unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name,
@@ -130,8 +129,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
if (!num || ioread32(vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN))
return ERR_PTR(-ENOENT);
- info->msix_vector = msix_vec;
-
/* create the vring */
vq = vring_create_virtqueue(index, num,
VIRTIO_PCI_VRING_ALIGN, &vp_dev->vdev,
@@ -162,14 +159,13 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
return ERR_PTR(err);
}
-static void del_vq(struct virtio_pci_vq_info *info)
+static void del_vq(struct virtqueue *vq)
{
- struct virtqueue *vq = info->vq;
struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
iowrite16(vq->index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL);
- if (vp_dev->msix_enabled) {
+ if (vp_dev->pci_dev->msix_enabled) {
iowrite16(VIRTIO_MSI_NO_VECTOR,
vp_dev->ioaddr + VIRTIO_MSI_QUEUE_VECTOR);
/* Flush the write out to device */
@@ -194,6 +190,7 @@ static const struct virtio_config_ops virtio_pci_config_ops = {
.finalize_features = vp_finalize_features,
.bus_name = vp_bus_name,
.set_vq_affinity = vp_set_vq_affinity,
+ .get_vq_affinity = vp_get_vq_affinity,
};
/* the PCI probing function */
diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
index 4bf7ab3..7bc3004 100644
--- a/drivers/virtio/virtio_pci_modern.c
+++ b/drivers/virtio/virtio_pci_modern.c
@@ -293,7 +293,6 @@ static u16 vp_config_vector(struct virtio_pci_device *vp_dev, u16 vector)
}
static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
- struct virtio_pci_vq_info *info,
unsigned index,
void (*callback)(struct virtqueue *vq),
const char *name,
@@ -323,8 +322,6 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
/* get offset of notification word for this vq */
off = vp_ioread16(&cfg->queue_notify_off);
- info->msix_vector = msix_vec;
-
/* create the vring */
vq = vring_create_virtqueue(index, num,
SMP_CACHE_BYTES, &vp_dev->vdev,
@@ -387,13 +384,12 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev,
}
static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[])
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc)
{
struct virtio_pci_device *vp_dev = to_vp_device(vdev);
struct virtqueue *vq;
- int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names);
+ int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, desc);
if (rc)
return rc;
@@ -409,14 +405,13 @@ static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs,
return 0;
}
-static void del_vq(struct virtio_pci_vq_info *info)
+static void del_vq(struct virtqueue *vq)
{
- struct virtqueue *vq = info->vq;
struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev);
vp_iowrite16(vq->index, &vp_dev->common->queue_select);
- if (vp_dev->msix_enabled) {
+ if (vp_dev->pci_dev->msix_enabled) {
vp_iowrite16(VIRTIO_MSI_NO_VECTOR,
&vp_dev->common->queue_msix_vector);
/* Flush the write out to device */
@@ -442,6 +437,7 @@ static const struct virtio_config_ops virtio_pci_config_nodev_ops = {
.finalize_features = vp_finalize_features,
.bus_name = vp_bus_name,
.set_vq_affinity = vp_set_vq_affinity,
+ .get_vq_affinity = vp_get_vq_affinity,
};
static const struct virtio_config_ops virtio_pci_config_ops = {
@@ -457,6 +453,7 @@ static const struct virtio_config_ops virtio_pci_config_ops = {
.finalize_features = vp_finalize_features,
.bus_name = vp_bus_name,
.set_vq_affinity = vp_set_vq_affinity,
+ .get_vq_affinity = vp_get_vq_affinity,
};
/**
diff --git a/include/linux/blk-mq-virtio.h b/include/linux/blk-mq-virtio.h
new file mode 100644
index 0000000..b1ef6e1
--- /dev/null
+++ b/include/linux/blk-mq-virtio.h
@@ -0,0 +1,10 @@
+#ifndef _LINUX_BLK_MQ_VIRTIO_H
+#define _LINUX_BLK_MQ_VIRTIO_H
+
+struct blk_mq_tag_set;
+struct virtio_device;
+
+int blk_mq_virtio_map_queues(struct blk_mq_tag_set *set,
+ struct virtio_device *vdev, int first_vec);
+
+#endif /* _LINUX_BLK_MQ_VIRTIO_H */
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index bb790c4..62d240e 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -26,7 +26,6 @@ enum cpuhp_state {
CPUHP_ARM_OMAP_WAKE_DEAD,
CPUHP_IRQ_POLL_DEAD,
CPUHP_BLOCK_SOFTIRQ_DEAD,
- CPUHP_VIRT_SCSI_DEAD,
CPUHP_ACPI_CPUDRV_DEAD,
CPUHP_S390_PFAULT_DEAD,
CPUHP_BLK_MQ_DEAD,
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 26c155b..8355bab 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -7,6 +7,8 @@
#include <linux/virtio_byteorder.h>
#include <uapi/linux/virtio_config.h>
+struct irq_affinity;
+
/**
* virtio_config_ops - operations for configuring a virtio device
* @get: read the value of a configuration field
@@ -56,6 +58,7 @@
* This returns a pointer to the bus name a la pci_name from which
* the caller can then copy.
* @set_vq_affinity: set the affinity for a virtqueue.
+ * @get_vq_affinity: get the affinity for a virtqueue (optional).
*/
typedef void vq_callback_t(struct virtqueue *);
struct virtio_config_ops {
@@ -68,14 +71,15 @@ struct virtio_config_ops {
void (*set_status)(struct virtio_device *vdev, u8 status);
void (*reset)(struct virtio_device *vdev);
int (*find_vqs)(struct virtio_device *, unsigned nvqs,
- struct virtqueue *vqs[],
- vq_callback_t *callbacks[],
- const char * const names[]);
+ struct virtqueue *vqs[], vq_callback_t *callbacks[],
+ const char * const names[], struct irq_affinity *desc);
void (*del_vqs)(struct virtio_device *);
u64 (*get_features)(struct virtio_device *vdev);
int (*finalize_features)(struct virtio_device *vdev);
const char *(*bus_name)(struct virtio_device *vdev);
int (*set_vq_affinity)(struct virtqueue *vq, int cpu);
+ const struct cpumask *(*get_vq_affinity)(struct virtio_device *vdev,
+ int index);
};
/* If driver didn't advertise the feature, it will never appear. */
@@ -169,7 +173,7 @@ struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev,
vq_callback_t *callbacks[] = { c };
const char *names[] = { n };
struct virtqueue *vq;
- int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names);
+ int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL);
if (err < 0)
return ERR_PTR(err);
return vq;
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 1c80efb..dd9820b 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -466,6 +466,7 @@
header-y += virtio_gpu.h
header-y += virtio_ids.h
header-y += virtio_input.h
+header-y += virtio_mmio.h
header-y += virtio_net.h
header-y += virtio_pci.h
header-y += virtio_ring.h
diff --git a/include/linux/virtio_mmio.h b/include/uapi/linux/virtio_mmio.h
similarity index 100%
rename from include/linux/virtio_mmio.h
rename to include/uapi/linux/virtio_mmio.h
diff --git a/include/uapi/linux/virtio_pci.h b/include/uapi/linux/virtio_pci.h
index 90007a1..15b4385 100644
--- a/include/uapi/linux/virtio_pci.h
+++ b/include/uapi/linux/virtio_pci.h
@@ -79,7 +79,7 @@
* configuration space */
#define VIRTIO_PCI_CONFIG_OFF(msix_enabled) ((msix_enabled) ? 24 : 20)
/* Deprecated: please use VIRTIO_PCI_CONFIG_OFF instead */
-#define VIRTIO_PCI_CONFIG(dev) VIRTIO_PCI_CONFIG_OFF((dev)->msix_enabled)
+#define VIRTIO_PCI_CONFIG(dev) VIRTIO_PCI_CONFIG_OFF((dev)->pci_dev->msix_enabled)
/* Virtio ABI version, this must match exactly */
#define VIRTIO_PCI_ABI_VERSION 0
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 6788264..9d24c0e 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -532,7 +532,8 @@ static int virtio_vsock_probe(struct virtio_device *vdev)
vsock->vdev = vdev;
ret = vsock->vdev->config->find_vqs(vsock->vdev, VSOCK_VQ_MAX,
- vsock->vqs, callbacks, names);
+ vsock->vqs, callbacks, names,
+ NULL);
if (ret < 0)
goto out;
