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Subject[PATCH 5/6] vdpa: introduce virtio pci driver
Date
This patch introduce a vDPA driver for virtio-pci device. It bridges
the virtio-pci control command to the vDPA bus. This will be used for
developing new features for both software vDPA framework and hardware
vDPA feature.

Compared to vdpa_sim, it has several advantages:

- it's a real device driver which allow us to play with real hardware
features
- type independent instead of networking specific

Note that since virtio specification does not support get/restore
virtqueue state. So we can not use this driver for VM. This can be
addressed by extending the virtio specification.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vdpa/Kconfig | 6 +
drivers/vdpa/Makefile | 1 +
drivers/vdpa/vp_vdpa/Makefile | 2 +
drivers/vdpa/vp_vdpa/vp_vdpa.c | 583 +++++++++++++++++++++++++++++++++
4 files changed, 592 insertions(+)
create mode 100644 drivers/vdpa/vp_vdpa/Makefile
create mode 100644 drivers/vdpa/vp_vdpa/vp_vdpa.c

diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index e8140065c8a5..3f1bf8b6723d 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -28,4 +28,10 @@ config IFCVF
To compile this driver as a module, choose M here: the module will
be called ifcvf.

+config VP_VDPA
+ tristate "Virtio PCI bridge vDPA driver"
+ depends on PCI_MSI
+ help
+ This kernel module that bridges virtio PCI device to vDPA bus.
+
endif # VDPA
diff --git a/drivers/vdpa/Makefile b/drivers/vdpa/Makefile
index 8bbb686ca7a2..37d00f49b3bf 100644
--- a/drivers/vdpa/Makefile
+++ b/drivers/vdpa/Makefile
@@ -2,3 +2,4 @@
obj-$(CONFIG_VDPA) += vdpa.o
obj-$(CONFIG_VDPA_SIM) += vdpa_sim/
obj-$(CONFIG_IFCVF) += ifcvf/
+obj-$(CONFIG_VP_VDPA) += vp_vdpa/
diff --git a/drivers/vdpa/vp_vdpa/Makefile b/drivers/vdpa/vp_vdpa/Makefile
new file mode 100644
index 000000000000..231088d3af7d
--- /dev/null
+++ b/drivers/vdpa/vp_vdpa/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_VP_VDPA) += vp_vdpa.o
diff --git a/drivers/vdpa/vp_vdpa/vp_vdpa.c b/drivers/vdpa/vp_vdpa/vp_vdpa.c
new file mode 100644
index 000000000000..e59c310e2156
--- /dev/null
+++ b/drivers/vdpa/vp_vdpa/vp_vdpa.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vDPA bridge driver for modern virtio-pci device
+ *
+ * Copyright (c) 2020, Red Hat Inc. All rights reserved.
+ * Author: Jason Wang <jasowang@redhat.com>
+ *
+ * Based on virtio_pci_modern.c.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+#include <linux/virtio.h>
+#include <linux/virtio_config.h>
+#include <linux/virtio_ring.h>
+#include <linux/virtio_pci.h>
+
+/* TBD: read from config space */
+#define VP_VDPA_MAX_QUEUE 2
+#define VP_VDPA_DRIVER_NAME "vp_vdpa"
+
+#define VP_VDPA_FEATURES \
+ (1ULL << VIRTIO_F_ANY_LAYOUT) | \
+ (1ULL << VIRTIO_F_VERSION_1) | \
+ (1ULL << VIRTIO_F_ORDER_PLATFORM) | \
+ (1ULL << VIRTIO_F_IOMMU_PLATFORM)
+
+struct vp_vring {
+ void __iomem *notify;
+ char msix_name[256];
+ struct vdpa_callback cb;
+ int irq;
+};
+
+struct vp_vdpa {
+ struct vdpa_device vdpa;
+ struct pci_dev *pdev;
+
+ struct virtio_device_id id;
+
+ struct vp_vring vring[VP_VDPA_MAX_QUEUE];
+
+ /* The IO mapping for the PCI config space */
+ void __iomem * const *base;
+ struct virtio_pci_common_cfg __iomem *common;
+ void __iomem *device;
+ /* Base of vq notifications */
+ void __iomem *notify;
+
+ /* Multiplier for queue_notify_off. */
+ u32 notify_off_multiplier;
+
+ int modern_bars;
+ int vectors;
+};
+
+static struct vp_vdpa *vdpa_to_vp(struct vdpa_device *vdpa)
+{
+ return container_of(vdpa, struct vp_vdpa, vdpa);
+}
+
+/*
+ * Type-safe wrappers for io accesses.
+ * Use these to enforce at compile time the following spec requirement:
+ *
+ * The driver MUST access each field using the “natural” access
+ * method, i.e. 32-bit accesses for 32-bit fields, 16-bit accesses
+ * for 16-bit fields and 8-bit accesses for 8-bit fields.
+ */
+static inline u8 vp_ioread8(u8 __iomem *addr)
+{
+ return ioread8(addr);
+}
+static inline u16 vp_ioread16 (__le16 __iomem *addr)
+{
+ return ioread16(addr);
+}
+
+static inline u32 vp_ioread32(__le32 __iomem *addr)
+{
+ return ioread32(addr);
+}
+
+static inline void vp_iowrite8(u8 value, u8 __iomem *addr)
+{
+ iowrite8(value, addr);
+}
+
+static inline void vp_iowrite16(u16 value, __le16 __iomem *addr)
+{
+ iowrite16(value, addr);
+}
+
+static inline void vp_iowrite32(u32 value, __le32 __iomem *addr)
+{
+ iowrite32(value, addr);
+}
+
+static void vp_iowrite64_twopart(u64 val,
+ __le32 __iomem *lo, __le32 __iomem *hi)
+{
+ vp_iowrite32((u32)val, lo);
+ vp_iowrite32(val >> 32, hi);
+}
+
+static int find_capability(struct pci_dev *dev, u8 cfg_type,
+ u32 ioresource_types, int *bars)
+{
+ int pos;
+
+ for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR);
+ pos > 0;
+ pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) {
+ u8 type, bar;
+ pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap,
+ cfg_type),
+ &type);
+ pci_read_config_byte(dev, pos + offsetof(struct virtio_pci_cap,
+ bar),
+ &bar);
+
+ /* Ignore structures with reserved BAR values */
+ if (bar > 0x5)
+ continue;
+
+ if (type == cfg_type) {
+ if (pci_resource_len(dev, bar) &&
+ pci_resource_flags(dev, bar) & ioresource_types) {
+ *bars |= (1 << bar);
+ return pos;
+ }
+ }
+ }
+ return 0;
+}
+
+static void __iomem *map_capability(struct vp_vdpa *vp_vdpa, int off)
+{
+ struct pci_dev *pdev = vp_vdpa->pdev;
+ u32 offset;
+ u8 bar;
+
+ pci_read_config_byte(pdev,
+ off + offsetof(struct virtio_pci_cap, bar),
+ &bar);
+ pci_read_config_dword(pdev,
+ off + offsetof(struct virtio_pci_cap, offset),
+ &offset);
+
+ return vp_vdpa->base[bar] + offset;
+}
+
+static u64 vp_vdpa_get_features(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+ u64 features;
+
+ vp_iowrite32(0, &vp_vdpa->common->device_feature_select);
+ features = vp_ioread32(&vp_vdpa->common->device_feature);
+ vp_iowrite32(1, &vp_vdpa->common->device_feature_select);
+ features |= ((u64)vp_ioread32(&vp_vdpa->common->device_feature) << 32);
+ features &= VP_VDPA_FEATURES;
+
+ return features;
+}
+
+static int vp_vdpa_set_features(struct vdpa_device *vdpa, u64 features)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_iowrite32(0, &vp_vdpa->common->guest_feature_select);
+ vp_iowrite32((u32)features, &vp_vdpa->common->guest_feature);
+ vp_iowrite32(1, &vp_vdpa->common->guest_feature_select);
+ vp_iowrite32(features >> 32, &vp_vdpa->common->guest_feature);
+
+ return 0;
+}
+
+static u8 vp_vdpa_get_status(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ return vp_ioread8(&vp_vdpa->common->device_status);
+}
+
+static void vp_vdpa_free_irq(struct vp_vdpa *vp_vdpa)
+{
+ struct pci_dev *pdev = vp_vdpa->pdev;
+ int i;
+
+ for (i = 0; i < VP_VDPA_MAX_QUEUE; i++) {
+ if (vp_vdpa->vring[i].irq != -1) {
+ vp_iowrite16(i, &vp_vdpa->common->queue_select);
+ vp_iowrite16(VIRTIO_MSI_NO_VECTOR,
+ &vp_vdpa->common->queue_msix_vector);
+ devm_free_irq(&pdev->dev, vp_vdpa->vring[i].irq,
+ &vp_vdpa->vring[i]);
+ vp_vdpa->vring[i].irq = -1;
+ }
+ }
+
+ if (vp_vdpa->vectors) {
+ pci_free_irq_vectors(pdev);
+ vp_vdpa->vectors = 0;
+ }
+}
+
+static irqreturn_t vp_vdpa_intr_handler(int irq, void *arg)
+{
+ struct vp_vring *vring = arg;
+
+ if (vring->cb.callback)
+ return vring->cb.callback(vring->cb.private);
+
+ return IRQ_HANDLED;
+}
+
+static int vp_vdpa_request_irq(struct vp_vdpa *vp_vdpa)
+{
+ struct pci_dev *pdev = vp_vdpa->pdev;
+ int i, ret, irq;
+
+ ret = pci_alloc_irq_vectors(pdev, VP_VDPA_MAX_QUEUE,
+ VP_VDPA_MAX_QUEUE, PCI_IRQ_MSIX);
+ if (ret != VP_VDPA_MAX_QUEUE) {
+ dev_err(&pdev->dev, "vp_vdpa: fail to allocate irq vectors\n");
+ return ret;
+ }
+
+ vp_vdpa->vectors = VP_VDPA_MAX_QUEUE;
+
+ for (i = 0; i < VP_VDPA_MAX_QUEUE; i++) {
+ snprintf(vp_vdpa->vring[i].msix_name, 256,
+ "vp-vdpa[%s]-%d\n", pci_name(pdev), i);
+ irq = pci_irq_vector(pdev, i);
+ ret = devm_request_irq(&pdev->dev, irq,
+ vp_vdpa_intr_handler,
+ 0, vp_vdpa->vring[i].msix_name,
+ &vp_vdpa->vring[i]);
+ if (ret) {
+ dev_err(&pdev->dev, "vp_vdpa: fail to request irq for vq %d\n", i);
+ goto err;
+ }
+ vp_iowrite16(i, &vp_vdpa->common->queue_select);
+ vp_iowrite16(i, &vp_vdpa->common->queue_msix_vector);
+ vp_vdpa->vring[i].irq = irq;
+ }
+
+ return 0;
+err:
+ vp_vdpa_free_irq(vp_vdpa);
+ return ret;
+}
+
+static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+ u8 s = vp_vdpa_get_status(vdpa);
+
+ if (status & VIRTIO_CONFIG_S_DRIVER_OK &&
+ !(s & VIRTIO_CONFIG_S_DRIVER_OK)) {
+ vp_vdpa_request_irq(vp_vdpa);
+ }
+
+ vp_iowrite8(status, &vp_vdpa->common->device_status);
+
+ if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) &&
+ (s & VIRTIO_CONFIG_S_DRIVER_OK))
+ vp_vdpa_free_irq(vp_vdpa);
+}
+
+static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ return vp_ioread16(&vp_vdpa->common->queue_size);
+}
+
+static u64 vp_vdpa_get_vq_state(struct vdpa_device *vdpa, u16 qid)
+{
+ return 0;
+}
+
+static int vp_vdpa_set_vq_state(struct vdpa_device *vdpa, u16 qid,
+ u64 num)
+{
+ /* Note that this is not supported by virtio specification, so
+ * we return -ENOTSUPP here. This means we can't support live
+ * migration, vhost device start/stop.
+ */
+
+ return -ENOTSUPP;
+}
+
+static void vp_vdpa_set_vq_cb(struct vdpa_device *vdpa, u16 qid,
+ struct vdpa_callback *cb)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_vdpa->vring[qid].cb = *cb;
+}
+
+static void vp_vdpa_set_vq_ready(struct vdpa_device *vdpa,
+ u16 qid, bool ready)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_iowrite16(qid, &vp_vdpa->common->queue_select);
+ vp_iowrite16(ready, &vp_vdpa->common->queue_enable);
+}
+
+static bool vp_vdpa_get_vq_ready(struct vdpa_device *vdpa, u16 qid)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_iowrite16(qid, &vp_vdpa->common->queue_select);
+
+ return vp_ioread16(&vp_vdpa->common->queue_enable);
+}
+
+static void vp_vdpa_set_vq_num(struct vdpa_device *vdpa, u16 qid,
+ u32 num)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_iowrite16(num, &vp_vdpa->common->queue_size);
+}
+
+static int vp_vdpa_set_vq_address(struct vdpa_device *vdpa, u16 qid,
+ u64 desc_area, u64 driver_area,
+ u64 device_area)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+ struct virtio_pci_common_cfg __iomem *cfg = vp_vdpa->common;
+
+ vp_iowrite16(qid, &cfg->queue_select);
+ vp_iowrite64_twopart(desc_area,
+ &cfg->queue_desc_lo, &cfg->queue_desc_hi);
+ vp_iowrite64_twopart(driver_area,
+ &cfg->queue_avail_lo, &cfg->queue_avail_hi);
+ vp_iowrite64_twopart(device_area,
+ &cfg->queue_used_lo, &cfg->queue_used_hi);
+
+ return 0;
+}
+
+static void vp_vdpa_kick_vq(struct vdpa_device *vdpa, u16 qid)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ vp_iowrite16(qid, vp_vdpa->vring[qid].notify);
+}
+
+static u32 vp_vdpa_get_generation(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ return vp_ioread8(&vp_vdpa->common->config_generation);
+}
+
+static u32 vp_vdpa_get_device_id(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ return vp_vdpa->id.device;
+}
+
+static u32 vp_vdpa_get_vendor_id(struct vdpa_device *vdpa)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+
+ return vp_vdpa->id.vendor;
+}
+
+static u32 vp_vdpa_get_vq_align(struct vdpa_device *vdpa)
+{
+ return PAGE_SIZE;
+}
+
+static void vp_vdpa_get_config(struct vdpa_device *vdpa,
+ unsigned int offset,
+ void *buf, unsigned int len)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+ u8 old, new;
+ u8 *p;
+ int i;
+
+ do {
+ old = vp_ioread8(&vp_vdpa->common->config_generation);
+ p = buf;
+ for (i = 0; i < len; i++)
+ *p++ = vp_ioread8(vp_vdpa->device + offset + i);
+
+ new = vp_ioread8(&vp_vdpa->common->config_generation);
+ } while (old != new);
+}
+
+static void vp_vdpa_set_config(struct vdpa_device *vdpa,
+ unsigned int offset, const void *buf,
+ unsigned int len)
+{
+ struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
+ const u8 *p = buf;
+ int i;
+
+ for (i = 0; i < len; i++)
+ vp_iowrite8(*p++, vp_vdpa->device + offset + i);
+}
+
+static void vp_vdpa_set_config_cb(struct vdpa_device *vdpa,
+ struct vdpa_callback *cb)
+{
+ /* We don't support config interrupt */
+}
+
+static const struct vdpa_config_ops vp_vdpa_ops = {
+ .get_features = vp_vdpa_get_features,
+ .set_features = vp_vdpa_set_features,
+ .get_status = vp_vdpa_get_status,
+ .set_status = vp_vdpa_set_status,
+ .get_vq_num_max = vp_vdpa_get_vq_num_max,
+ .get_vq_state = vp_vdpa_get_vq_state,
+ .set_vq_state = vp_vdpa_set_vq_state,
+ .set_vq_cb = vp_vdpa_set_vq_cb,
+ .set_vq_ready = vp_vdpa_set_vq_ready,
+ .get_vq_ready = vp_vdpa_get_vq_ready,
+ .set_vq_num = vp_vdpa_set_vq_num,
+ .set_vq_address = vp_vdpa_set_vq_address,
+ .kick_vq = vp_vdpa_kick_vq,
+ .get_generation = vp_vdpa_get_generation,
+ .get_device_id = vp_vdpa_get_device_id,
+ .get_vendor_id = vp_vdpa_get_vendor_id,
+ .get_vq_align = vp_vdpa_get_vq_align,
+ .get_config = vp_vdpa_get_config,
+ .set_config = vp_vdpa_set_config,
+ .set_config_cb = vp_vdpa_set_config_cb,
+};
+
+static int vp_vdpa_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct device *dev = &pdev->dev;
+ struct vp_vdpa *vp_vdpa;
+ int common, notify, device, ret, i;
+ struct virtio_device_id virtio_id;
+ u16 notify_off;
+
+ /* We only own devices >= 0x1000 and <= 0x107f: leave the rest. */
+ if (pdev->device < 0x1000 || pdev->device > 0x107f)
+ return -ENODEV;
+
+ if (pdev->device < 0x1040) {
+ /* Transitional devices: use the PCI subsystem device id as
+ * virtio device id, same as legacy driver always did.
+ */
+ virtio_id.device = pdev->subsystem_device;
+ } else {
+ /* Modern devices: simply use PCI device id, but start from 0x1040. */
+ virtio_id.device = pdev->device - 0x1040;
+ }
+ virtio_id.vendor = pdev->subsystem_vendor;
+
+ ret = pcim_enable_device(pdev);
+ if (ret) {
+ dev_err(dev, "vp_vdpa: Fail to enable PCI device\n");
+ return ret;
+ }
+
+ vp_vdpa = vdpa_alloc_device(struct vp_vdpa, vdpa,
+ dev, &vp_vdpa_ops);
+ if (vp_vdpa == NULL) {
+ dev_err(dev, "vp_vdpa: Failed to allocate vDPA structure\n");
+ return -ENOMEM;
+ }
+
+ pci_set_master(pdev);
+ pci_set_drvdata(pdev, vp_vdpa);
+
+ vp_vdpa->pdev = pdev;
+ vp_vdpa->vdpa.dma_dev = &pdev->dev;
+
+ common = find_capability(pdev, VIRTIO_PCI_CAP_COMMON_CFG,
+ IORESOURCE_IO | IORESOURCE_MEM,
+ &vp_vdpa->modern_bars);
+ if (!common) {
+ dev_err(&pdev->dev,
+ "vp_vdpa: legacy device is not supported\n");
+ ret = -ENODEV;
+ goto err;
+ }
+
+ notify = find_capability(pdev, VIRTIO_PCI_CAP_NOTIFY_CFG,
+ IORESOURCE_IO | IORESOURCE_MEM,
+ &vp_vdpa->modern_bars);
+ if (!notify) {
+ dev_err(&pdev->dev,
+ "vp_vdpa: missing notification capabilities\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ device = find_capability(pdev, VIRTIO_PCI_CAP_DEVICE_CFG,
+ IORESOURCE_IO | IORESOURCE_MEM,
+ &vp_vdpa->modern_bars);
+ if (!device) {
+ dev_err(&pdev->dev,
+ "vp_vdpa: missing device capabilities\n");
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = pcim_iomap_regions(pdev, vp_vdpa->modern_bars,
+ VP_VDPA_DRIVER_NAME);
+ if (ret)
+ goto err;
+
+ vp_vdpa->base = pcim_iomap_table(pdev);
+
+ ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
+ if (ret)
+ ret = dma_set_mask_and_coherent(&pdev->dev,
+ DMA_BIT_MASK(32));
+ if (ret)
+ dev_warn(&pdev->dev, "Failed to enable 64-bit or 32-bit DMA. Trying to continue, but this might not work.\n");
+
+ vp_vdpa->device = map_capability(vp_vdpa, device);
+ vp_vdpa->notify = map_capability(vp_vdpa, notify);
+ vp_vdpa->common = map_capability(vp_vdpa, common);
+ vp_vdpa->id = virtio_id;
+
+ ret = vdpa_register_device(&vp_vdpa->vdpa);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register to vdpa bus\n");
+ goto err;
+ }
+
+ pci_read_config_dword(pdev, notify + sizeof(struct virtio_pci_cap),
+ &vp_vdpa->notify_off_multiplier);
+
+ for (i = 0; i < VP_VDPA_MAX_QUEUE; i++) {
+ vp_iowrite16(i, &vp_vdpa->common->queue_select);
+ notify_off = vp_ioread16(&vp_vdpa->common->queue_notify_off);
+ vp_vdpa->vring[i].irq = -1;
+ vp_vdpa->vring[i].notify = vp_vdpa->notify +
+ notify_off * vp_vdpa->notify_off_multiplier;
+ }
+
+ return 0;
+
+err:
+ put_device(&vp_vdpa->vdpa.dev);
+ return ret;
+}
+
+static void vp_vdpa_remove(struct pci_dev *pdev)
+{
+ struct vp_vdpa *vp_vdpa = pci_get_drvdata(pdev);
+
+ vdpa_unregister_device(&vp_vdpa->vdpa);
+}
+
+static const struct pci_device_id vp_vdpa_id_table[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_REDHAT_QUMRANET, PCI_ANY_ID) },
+ { 0 }
+};
+
+MODULE_DEVICE_TABLE(pci, vp_vdpa_id_table);
+
+static struct pci_driver vp_vdpa_driver = {
+ .name = "vp-vdpa",
+ .id_table = vp_vdpa_id_table,
+ .probe = vp_vdpa_probe,
+ .remove = vp_vdpa_remove,
+};
+
+module_pci_driver(vp_vdpa_driver);
+
+MODULE_AUTHOR("Jason Wang <jasowang@redhat.com>");
+MODULE_DESCRIPTION("vp-vdpa");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1");
--
2.20.1
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  Last update: 2020-05-29 10:06    [W:0.320 / U:0.476 seconds]
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