cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vdpa_sim.h (2739B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * Copyright (c) 2020, Red Hat Inc. All rights reserved.
      4 */
      5
      6#ifndef _VDPA_SIM_H
      7#define _VDPA_SIM_H
      8
      9#include <linux/iova.h>
     10#include <linux/vringh.h>
     11#include <linux/vdpa.h>
     12#include <linux/virtio_byteorder.h>
     13#include <linux/vhost_iotlb.h>
     14#include <uapi/linux/virtio_config.h>
     15
     16#define VDPASIM_FEATURES	((1ULL << VIRTIO_F_ANY_LAYOUT) | \
     17				 (1ULL << VIRTIO_F_VERSION_1)  | \
     18				 (1ULL << VIRTIO_F_ACCESS_PLATFORM))
     19
     20struct vdpasim;
     21
     22struct vdpasim_virtqueue {
     23	struct vringh vring;
     24	struct vringh_kiov in_iov;
     25	struct vringh_kiov out_iov;
     26	unsigned short head;
     27	bool ready;
     28	u64 desc_addr;
     29	u64 device_addr;
     30	u64 driver_addr;
     31	u32 num;
     32	void *private;
     33	irqreturn_t (*cb)(void *data);
     34};
     35
     36struct vdpasim_dev_attr {
     37	struct vdpa_mgmt_dev *mgmt_dev;
     38	const char *name;
     39	u64 supported_features;
     40	size_t config_size;
     41	size_t buffer_size;
     42	int nvqs;
     43	u32 id;
     44	u32 ngroups;
     45	u32 nas;
     46
     47	work_func_t work_fn;
     48	void (*get_config)(struct vdpasim *vdpasim, void *config);
     49	void (*set_config)(struct vdpasim *vdpasim, const void *config);
     50};
     51
     52/* State of each vdpasim device */
     53struct vdpasim {
     54	struct vdpa_device vdpa;
     55	struct vdpasim_virtqueue *vqs;
     56	struct work_struct work;
     57	struct vdpasim_dev_attr dev_attr;
     58	/* spinlock to synchronize virtqueue state */
     59	spinlock_t lock;
     60	/* virtio config according to device type */
     61	void *config;
     62	struct vhost_iotlb *iommu;
     63	struct iova_domain iova;
     64	void *buffer;
     65	u32 status;
     66	u32 generation;
     67	u64 features;
     68	u32 groups;
     69	/* spinlock to synchronize iommu table */
     70	spinlock_t iommu_lock;
     71};
     72
     73struct vdpasim *vdpasim_create(struct vdpasim_dev_attr *attr);
     74
     75/* TODO: cross-endian support */
     76static inline bool vdpasim_is_little_endian(struct vdpasim *vdpasim)
     77{
     78	return virtio_legacy_is_little_endian() ||
     79		(vdpasim->features & (1ULL << VIRTIO_F_VERSION_1));
     80}
     81
     82static inline u16 vdpasim16_to_cpu(struct vdpasim *vdpasim, __virtio16 val)
     83{
     84	return __virtio16_to_cpu(vdpasim_is_little_endian(vdpasim), val);
     85}
     86
     87static inline __virtio16 cpu_to_vdpasim16(struct vdpasim *vdpasim, u16 val)
     88{
     89	return __cpu_to_virtio16(vdpasim_is_little_endian(vdpasim), val);
     90}
     91
     92static inline u32 vdpasim32_to_cpu(struct vdpasim *vdpasim, __virtio32 val)
     93{
     94	return __virtio32_to_cpu(vdpasim_is_little_endian(vdpasim), val);
     95}
     96
     97static inline __virtio32 cpu_to_vdpasim32(struct vdpasim *vdpasim, u32 val)
     98{
     99	return __cpu_to_virtio32(vdpasim_is_little_endian(vdpasim), val);
    100}
    101
    102static inline u64 vdpasim64_to_cpu(struct vdpasim *vdpasim, __virtio64 val)
    103{
    104	return __virtio64_to_cpu(vdpasim_is_little_endian(vdpasim), val);
    105}
    106
    107static inline __virtio64 cpu_to_vdpasim64(struct vdpasim *vdpasim, u64 val)
    108{
    109	return __cpu_to_virtio64(vdpasim_is_little_endian(vdpasim), val);
    110}
    111
    112#endif