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drivers: vhost: Add Xen-MMIO VIRTIO backend #91605

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drivers: vhost: Add Xen-MMIO VIRTIO backend #91605

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9a620d7
[DNM] manifest: add Xen module
soburi Jun 13, 2025
ecc4750
modules: add and migrate to the Xen module
soburi Jun 14, 2025
2bb5f42
[DNM] manifest: Update Xen module
soburi Jun 13, 2025
710d11d
arch: arm64: core: xen: hypercall: Add `dm_op` hypercall
soburi May 17, 2025
754452c
drivers: xen: add more hypercall wrapper
soburi May 18, 2025
0ef7694
drivers: xen: implement grant table operations
soburi Jul 29, 2025
834a8a3
drivers: virtio: Separate macros into a common header
soburi Jul 21, 2025
071ee76
drivers: xen: add basic XenStore access features
soburi Jun 15, 2025
8ed4fd1
drivers: Introduce vhost driver subsystem
soburi Jul 21, 2025
af226c7
drivers: vhost: add Xen MMIO VirtIO backend
soburi Jun 13, 2025
9376df3
samples: drivers: virtualization: add vhost sample application
soburi May 17, 2025
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1 change: 1 addition & 0 deletions drivers/virtio/virtio_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
#include <zephyr/logging/log.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/drivers/virtio.h>
#include <zephyr/drivers/virtio/virtio_config.h>
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Comment for drivers: virtio: Separate macros into a common header:
I am not responsible for this part of code, but I have no idea why did you change it, commit message definitely should describe it better.

#include <zephyr/drivers/virtio/virtqueue.h>
#include "virtio_common.h"

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61 changes: 0 additions & 61 deletions drivers/virtio/virtio_common.h
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Expand Up @@ -7,67 +7,6 @@
#ifndef ZEPHYR_VIRTIO_VIRTIO_COMMON_H_
#define ZEPHYR_VIRTIO_VIRTIO_COMMON_H_

#define DEVICE_STATUS_ACKNOWLEDGE 0
#define DEVICE_STATUS_DRIVER 1
#define DEVICE_STATUS_DRIVER_OK 2
#define DEVICE_STATUS_FEATURES_OK 3
#define DEVICE_STATUS_NEEDS_RESET 6
#define DEVICE_STATUS_FAILED 7

#define VIRTIO_F_VERSION_1 32

/* Ranges of feature bits for specific device types (see spec 2.2)*/
#define DEV_TYPE_FEAT_RANGE_0_BEGIN 0
#define DEV_TYPE_FEAT_RANGE_0_END 23
#define DEV_TYPE_FEAT_RANGE_1_BEGIN 50
#define DEV_TYPE_FEAT_RANGE_1_END 127

/*
* While defined separately in 4.1.4.5 for PCI and in 4.2.2 for MMIO
* the same bits are responsible for the same interrupts, so defines
* with them can be unified
*/
#define VIRTIO_QUEUE_INTERRUPT 1
#define VIRTIO_DEVICE_CONFIGURATION_INTERRUPT 2

/*
* VIRTIO-MMIO register definitions.
*
* Based on Virtual I/O Device (VIRTIO) Version 1.3 specification:
* https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.pdf
*/

#define VIRTIO_MMIO_MAGIC_VALUE 0x000
#define VIRTIO_MMIO_VERSION 0x004
#define VIRTIO_MMIO_DEVICE_ID 0x008
#define VIRTIO_MMIO_VENDOR_ID 0x00c
#define VIRTIO_MMIO_DEVICE_FEATURES 0x010
#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014
#define VIRTIO_MMIO_DRIVER_FEATURES 0x020
#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024
#define VIRTIO_MMIO_QUEUE_SEL 0x030
#define VIRTIO_MMIO_QUEUE_SIZE_MAX 0x034
#define VIRTIO_MMIO_QUEUE_SIZE 0x038
#define VIRTIO_MMIO_QUEUE_READY 0x044
#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
#define VIRTIO_MMIO_STATUS 0x070
#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080
#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084
#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090
#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094
#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0
#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4
#define VIRTIO_MMIO_SHM_SEL 0x0ac
#define VIRTIO_MMIO_SHM_LEN_LOW 0x0b0
#define VIRTIO_MMIO_SHM_LEN_HIGH 0x0b4
#define VIRTIO_MMIO_SHM_BASE_LOW 0x0b8
#define VIRTIO_MMIO_SHM_BASE_HIGH 0x0bc
#define VIRTIO_MMIO_QUEUE_RESET 0x0c0
#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc
#define VIRTIO_MMIO_CONFIG 0x100

/**
* Common virtio isr
*
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1 change: 1 addition & 0 deletions drivers/virtio/virtio_mmio.c
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Expand Up @@ -11,6 +11,7 @@
#include <zephyr/sys/barrier.h>
#include <zephyr/sys/byteorder.h>
#include <zephyr/drivers/virtio.h>
#include <zephyr/drivers/virtio/virtio_config.h>
#include <zephyr/drivers/virtio/virtqueue.h>
#include "virtio_common.h"

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80 changes: 80 additions & 0 deletions include/zephyr/drivers/virtio/virtio_config.h
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/*
* Copyright (c) 2025 Antmicro <www.antmicro.com>
*
* SPDX-License-Identifier: Apache-2.0
*/

#ifndef ZEPHYR_DRIVERS_VIRTIO_VIRTIO_DEFINES_H_
#define ZEPHYR_DRIVERS_VIRTIO_VIRTIO_DEFINES_H_

#define DEVICE_STATUS_ACKNOWLEDGE 0
#define DEVICE_STATUS_DRIVER 1
#define DEVICE_STATUS_DRIVER_OK 2
#define DEVICE_STATUS_FEATURES_OK 3
#define DEVICE_STATUS_NEEDS_RESET 6
#define DEVICE_STATUS_FAILED 7

#define VIRTIO_F_ANY_LAYOUT 27
#define VIRTIO_F_VERSION_1 32
#define VIRTIO_F_ACCESS_PLATFORM 33

#define VIRTIO_RING_F_INDIRECT_DESC 28
#define VIRTIO_RING_F_EVENT_IDX 29

#define VIRTQ_AVAIL_F_NO_INTERRUPT 1

#define VIRTQ_USED_F_NO_NOTIFY 1

/* Ranges of feature bits for specific device types (see spec 2.2)*/
#define DEV_TYPE_FEAT_RANGE_0_BEGIN 0
#define DEV_TYPE_FEAT_RANGE_0_END 23
#define DEV_TYPE_FEAT_RANGE_1_BEGIN 50
#define DEV_TYPE_FEAT_RANGE_1_END 127

/*
* While defined separately in 4.1.4.5 for PCI and in 4.2.2 for MMIO
* the same bits are responsible for the same interrupts, so defines
* with them can be unified
*/
#define VIRTIO_QUEUE_INTERRUPT 1
#define VIRTIO_DEVICE_CONFIGURATION_INTERRUPT 2

/*
* VIRTIO-MMIO register definitions.
*
* Based on Virtual I/O Device (VIRTIO) Version 1.3 specification:
* https://docs.oasis-open.org/virtio/virtio/v1.3/csd01/virtio-v1.3-csd01.pdf
*/

#define VIRTIO_MMIO_MAGIC_VALUE 0x000
#define VIRTIO_MMIO_VERSION 0x004
#define VIRTIO_MMIO_DEVICE_ID 0x008
#define VIRTIO_MMIO_VENDOR_ID 0x00c
#define VIRTIO_MMIO_DEVICE_FEATURES 0x010
#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014
#define VIRTIO_MMIO_DRIVER_FEATURES 0x020
#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024
#define VIRTIO_MMIO_QUEUE_SEL 0x030
#define VIRTIO_MMIO_QUEUE_SIZE_MAX 0x034
#define VIRTIO_MMIO_QUEUE_SIZE 0x038
#define VIRTIO_MMIO_QUEUE_READY 0x044
#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
#define VIRTIO_MMIO_STATUS 0x070
#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080
#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084
#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090
#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094
#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0
#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4
#define VIRTIO_MMIO_SHM_SEL 0x0ac
#define VIRTIO_MMIO_SHM_LEN_LOW 0x0b0
#define VIRTIO_MMIO_SHM_LEN_HIGH 0x0b4
#define VIRTIO_MMIO_SHM_BASE_LOW 0x0b8
#define VIRTIO_MMIO_SHM_BASE_HIGH 0x0bc
#define VIRTIO_MMIO_QUEUE_RESET 0x0c0
#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc
#define VIRTIO_MMIO_CONFIG 0x100

#endif /* ZEPHYR_DRIVERS_VIRTIO_VIRTIO_DEFINES_H_ */