d11f2f184d
This is placed into drivers/virtualization as it does not belong to any existing subsystem. This is only the ivshmem-plain variant. This device is provided by qemu or ACRN, and can be used to share memory either between the host and the VM or between VMs. Here if zephyr is used as a VM, it will be able to take advantage of such feature. Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
46 lines
1,008 B
C
46 lines
1,008 B
C
/*
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* Copyright (c) 2020 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_DRIVERS_VIRTUALIZATION_IVSHMEM_H_
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#define ZEPHYR_INCLUDE_DRIVERS_VIRTUALIZATION_IVSHMEM_H_
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#include <zephyr/types.h>
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#include <stddef.h>
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#include <device.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef size_t (*ivshmem_get_mem_f)(const struct device *dev,
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uintptr_t *memmap);
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struct ivshmem_driver_api {
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ivshmem_get_mem_f get_mem;
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};
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/**
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* @brief Get the inter-VM shared memory
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*
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* @param dev Pointer to the device structure for the driver instance
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* @param memmap A pointer to fill in with the memory address
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*
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* @return the size of the memory mapped, or 0
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*/
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static inline size_t ivshmem_get_mem(const struct device *dev,
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uintptr_t *memmap)
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{
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const struct ivshmem_driver_api *api =
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(const struct ivshmem_driver_api *)dev->api;
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return api->get_mem(dev, memmap);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* ZEPHYR_INCLUDE_DRIVERS_VIRTUALIZATION_IVSHMEM_H_ */
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