cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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vhost_types.h (4120B)

      1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2#ifndef _LINUX_VHOST_TYPES_H
      3#define _LINUX_VHOST_TYPES_H
      4/* Userspace interface for in-kernel virtio accelerators. */
      5
      6/* vhost is used to reduce the number of system calls involved in virtio.
      7 *
      8 * Existing virtio net code is used in the guest without modification.
      9 *
     10 * This header includes interface used by userspace hypervisor for
     11 * device configuration.
     12 */
     13
     14#include "standard-headers/linux/types.h"
     15
     16#include "standard-headers/linux/virtio_config.h"
     17#include "standard-headers/linux/virtio_ring.h"
     18
     19struct vhost_vring_state {
     20	unsigned int index;
     21	unsigned int num;
     22};
     23
     24struct vhost_vring_file {
     25	unsigned int index;
     26	int fd; /* Pass -1 to unbind from file. */
     27
     28};
     29
     30struct vhost_vring_addr {
     31	unsigned int index;
     32	/* Option flags. */
     33	unsigned int flags;
     34	/* Flag values: */
     35	/* Whether log address is valid. If set enables logging. */
     36#define VHOST_VRING_F_LOG 0
     37
     38	/* Start of array of descriptors (virtually contiguous) */
     39	uint64_t desc_user_addr;
     40	/* Used structure address. Must be 32 bit aligned */
     41	uint64_t used_user_addr;
     42	/* Available structure address. Must be 16 bit aligned */
     43	uint64_t avail_user_addr;
     44	/* Logging support. */
     45	/* Log writes to used structure, at offset calculated from specified
     46	 * address. Address must be 32 bit aligned. */
     47	uint64_t log_guest_addr;
     48};
     49
     50/* no alignment requirement */
     51struct vhost_iotlb_msg {
     52	uint64_t iova;
     53	uint64_t size;
     54	uint64_t uaddr;
     55#define VHOST_ACCESS_RO      0x1
     56#define VHOST_ACCESS_WO      0x2
     57#define VHOST_ACCESS_RW      0x3
     58	uint8_t perm;
     59#define VHOST_IOTLB_MISS           1
     60#define VHOST_IOTLB_UPDATE         2
     61#define VHOST_IOTLB_INVALIDATE     3
     62#define VHOST_IOTLB_ACCESS_FAIL    4
     63/*
     64 * VHOST_IOTLB_BATCH_BEGIN and VHOST_IOTLB_BATCH_END allow modifying
     65 * multiple mappings in one go: beginning with
     66 * VHOST_IOTLB_BATCH_BEGIN, followed by any number of
     67 * VHOST_IOTLB_UPDATE messages, and ending with VHOST_IOTLB_BATCH_END.
     68 * When one of these two values is used as the message type, the rest
     69 * of the fields in the message are ignored. There's no guarantee that
     70 * these changes take place automatically in the device.
     71 */
     72#define VHOST_IOTLB_BATCH_BEGIN    5
     73#define VHOST_IOTLB_BATCH_END      6
     74	uint8_t type;
     75};
     76
     77#define VHOST_IOTLB_MSG 0x1
     78#define VHOST_IOTLB_MSG_V2 0x2
     79
     80struct vhost_msg {
     81	int type;
     82	union {
     83		struct vhost_iotlb_msg iotlb;
     84		uint8_t padding[64];
     85	};
     86};
     87
     88struct vhost_msg_v2 {
     89	uint32_t type;
     90	uint32_t reserved;
     91	union {
     92		struct vhost_iotlb_msg iotlb;
     93		uint8_t padding[64];
     94	};
     95};
     96
     97struct vhost_memory_region {
     98	uint64_t guest_phys_addr;
     99	uint64_t memory_size; /* bytes */
    100	uint64_t userspace_addr;
    101	uint64_t flags_padding; /* No flags are currently specified. */
    102};
    103
    104/* All region addresses and sizes must be 4K aligned. */
    105#define VHOST_PAGE_SIZE 0x1000
    106
    107struct vhost_memory {
    108	uint32_t nregions;
    109	uint32_t padding;
    110	struct vhost_memory_region regions[0];
    111};
    112
    113/* VHOST_SCSI specific definitions */
    114
    115/*
    116 * Used by QEMU userspace to ensure a consistent vhost-scsi ABI.
    117 *
    118 * ABI Rev 0: July 2012 version starting point for v3.6-rc merge candidate +
    119 *            RFC-v2 vhost-scsi userspace.  Add GET_ABI_VERSION ioctl usage
    120 * ABI Rev 1: January 2013. Ignore vhost_tpgt field in struct vhost_scsi_target.
    121 *            All the targets under vhost_wwpn can be seen and used by guset.
    122 */
    123
    124#define VHOST_SCSI_ABI_VERSION	1
    125
    126struct vhost_scsi_target {
    127	int abi_version;
    128	char vhost_wwpn[224]; /* TRANSPORT_IQN_LEN */
    129	unsigned short vhost_tpgt;
    130	unsigned short reserved;
    131};
    132
    133/* VHOST_VDPA specific definitions */
    134
    135struct vhost_vdpa_config {
    136	uint32_t off;
    137	uint32_t len;
    138	uint8_t buf[0];
    139};
    140
    141/* vhost vdpa IOVA range
    142 * @first: First address that can be mapped by vhost-vDPA
    143 * @last: Last address that can be mapped by vhost-vDPA
    144 */
    145struct vhost_vdpa_iova_range {
    146	uint64_t first;
    147	uint64_t last;
    148};
    149
    150/* Feature bits */
    151/* Log all write descriptors. Can be changed while device is active. */
    152#define VHOST_F_LOG_ALL 26
    153/* vhost-net should add virtio_net_hdr for RX, and strip for TX packets. */
    154#define VHOST_NET_F_VIRTIO_NET_HDR 27
    155
    156#endif