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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cxl.h (3951B)

      1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
      2/*
      3 * Copyright 2014 IBM Corp.
      4 *
      5 * This program is free software; you can redistribute it and/or
      6 * modify it under the terms of the GNU General Public License
      7 * as published by the Free Software Foundation; either version
      8 * 2 of the License, or (at your option) any later version.
      9 */
     10
     11#ifndef _UAPI_MISC_CXL_H
     12#define _UAPI_MISC_CXL_H
     13
     14#include <linux/types.h>
     15#include <linux/ioctl.h>
     16
     17
     18struct cxl_ioctl_start_work {
     19	__u64 flags;
     20	__u64 work_element_descriptor;
     21	__u64 amr;
     22	__s16 num_interrupts;
     23	__u16 tid;
     24	__s32 reserved1;
     25	__u64 reserved2;
     26	__u64 reserved3;
     27	__u64 reserved4;
     28	__u64 reserved5;
     29};
     30
     31#define CXL_START_WORK_AMR		0x0000000000000001ULL
     32#define CXL_START_WORK_NUM_IRQS		0x0000000000000002ULL
     33#define CXL_START_WORK_ERR_FF		0x0000000000000004ULL
     34#define CXL_START_WORK_TID		0x0000000000000008ULL
     35#define CXL_START_WORK_ALL		(CXL_START_WORK_AMR |\
     36					 CXL_START_WORK_NUM_IRQS |\
     37					 CXL_START_WORK_ERR_FF |\
     38					 CXL_START_WORK_TID)
     39
     40
     41/* Possible modes that an afu can be in */
     42#define CXL_MODE_DEDICATED   0x1
     43#define CXL_MODE_DIRECTED    0x2
     44
     45/* possible flags for the cxl_afu_id flags field */
     46#define CXL_AFUID_FLAG_SLAVE    0x1  /* In directed-mode afu is in slave mode */
     47
     48struct cxl_afu_id {
     49	__u64 flags;     /* One of CXL_AFUID_FLAG_X */
     50	__u32 card_id;
     51	__u32 afu_offset;
     52	__u32 afu_mode;  /* one of the CXL_MODE_X */
     53	__u32 reserved1;
     54	__u64 reserved2;
     55	__u64 reserved3;
     56	__u64 reserved4;
     57	__u64 reserved5;
     58	__u64 reserved6;
     59};
     60
     61/* base adapter image header is included in the image */
     62#define CXL_AI_NEED_HEADER	0x0000000000000001ULL
     63#define CXL_AI_ALL		CXL_AI_NEED_HEADER
     64
     65#define CXL_AI_HEADER_SIZE 128
     66#define CXL_AI_BUFFER_SIZE 4096
     67#define CXL_AI_MAX_ENTRIES 256
     68#define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)
     69
     70struct cxl_adapter_image {
     71	__u64 flags;
     72	__u64 data;
     73	__u64 len_data;
     74	__u64 len_image;
     75	__u64 reserved1;
     76	__u64 reserved2;
     77	__u64 reserved3;
     78	__u64 reserved4;
     79};
     80
     81/* ioctl numbers */
     82#define CXL_MAGIC 0xCA
     83/* AFU devices */
     84#define CXL_IOCTL_START_WORK		_IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
     85#define CXL_IOCTL_GET_PROCESS_ELEMENT	_IOR(CXL_MAGIC, 0x01, __u32)
     86#define CXL_IOCTL_GET_AFU_ID            _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
     87/* adapter devices */
     88#define CXL_IOCTL_DOWNLOAD_IMAGE        _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)
     89#define CXL_IOCTL_VALIDATE_IMAGE        _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)
     90
     91#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
     92
     93/* Events from read() */
     94enum cxl_event_type {
     95	CXL_EVENT_RESERVED      = 0,
     96	CXL_EVENT_AFU_INTERRUPT = 1,
     97	CXL_EVENT_DATA_STORAGE  = 2,
     98	CXL_EVENT_AFU_ERROR     = 3,
     99	CXL_EVENT_AFU_DRIVER    = 4,
    100};
    101
    102struct cxl_event_header {
    103	__u16 type;
    104	__u16 size;
    105	__u16 process_element;
    106	__u16 reserved1;
    107};
    108
    109struct cxl_event_afu_interrupt {
    110	__u16 flags;
    111	__u16 irq; /* Raised AFU interrupt number */
    112	__u32 reserved1;
    113};
    114
    115struct cxl_event_data_storage {
    116	__u16 flags;
    117	__u16 reserved1;
    118	__u32 reserved2;
    119	__u64 addr;
    120	__u64 dsisr;
    121	__u64 reserved3;
    122};
    123
    124struct cxl_event_afu_error {
    125	__u16 flags;
    126	__u16 reserved1;
    127	__u32 reserved2;
    128	__u64 error;
    129};
    130
    131struct cxl_event_afu_driver_reserved {
    132	/*
    133	 * Defines the buffer passed to the cxl driver by the AFU driver.
    134	 *
    135	 * This is not ABI since the event header.size passed to the user for
    136	 * existing events is set in the read call to sizeof(cxl_event_header)
    137	 * + sizeof(whatever event is being dispatched) and the user is already
    138	 * required to use a 4K buffer on the read call.
    139	 *
    140	 * Of course the contents will be ABI, but that's up the AFU driver.
    141	 */
    142	__u32 data_size;
    143	__u8 data[];
    144};
    145
    146struct cxl_event {
    147	struct cxl_event_header header;
    148	union {
    149		struct cxl_event_afu_interrupt irq;
    150		struct cxl_event_data_storage fault;
    151		struct cxl_event_afu_error afu_error;
    152		struct cxl_event_afu_driver_reserved afu_driver_event;
    153	};
    154};
    155
    156#endif /* _UAPI_MISC_CXL_H */