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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eadm.h (2081B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_S390_EADM_H
      3#define _ASM_S390_EADM_H
      4
      5#include <linux/types.h>
      6#include <linux/device.h>
      7#include <linux/blk_types.h>
      8
      9struct arqb {
     10	u64 data;
     11	u16 fmt:4;
     12	u16:12;
     13	u16 cmd_code;
     14	u16:16;
     15	u16 msb_count;
     16	u32 reserved[12];
     17} __packed;
     18
     19#define ARQB_CMD_MOVE	1
     20
     21struct arsb {
     22	u16 fmt:4;
     23	u32:28;
     24	u8 ef;
     25	u8:8;
     26	u8 ecbi;
     27	u8:8;
     28	u8 fvf;
     29	u16:16;
     30	u8 eqc;
     31	u32:32;
     32	u64 fail_msb;
     33	u64 fail_aidaw;
     34	u64 fail_ms;
     35	u64 fail_scm;
     36	u32 reserved[4];
     37} __packed;
     38
     39#define EQC_WR_PROHIBIT 22
     40
     41struct msb {
     42	u8 fmt:4;
     43	u8 oc:4;
     44	u8 flags;
     45	u16:12;
     46	u16 bs:4;
     47	u32 blk_count;
     48	u64 data_addr;
     49	u64 scm_addr;
     50	u64:64;
     51} __packed;
     52
     53struct aidaw {
     54	u8 flags;
     55	u32 :24;
     56	u32 :32;
     57	u64 data_addr;
     58} __packed;
     59
     60#define MSB_OC_CLEAR	0
     61#define MSB_OC_READ	1
     62#define MSB_OC_WRITE	2
     63#define MSB_OC_RELEASE	3
     64
     65#define MSB_FLAG_BNM	0x80
     66#define MSB_FLAG_IDA	0x40
     67
     68#define MSB_BS_4K	0
     69#define MSB_BS_1M	1
     70
     71#define AOB_NR_MSB	124
     72
     73struct aob {
     74	struct arqb request;
     75	struct arsb response;
     76	struct msb msb[AOB_NR_MSB];
     77} __packed __aligned(PAGE_SIZE);
     78
     79struct aob_rq_header {
     80	struct scm_device *scmdev;
     81	char data[];
     82};
     83
     84struct scm_device {
     85	u64 address;
     86	u64 size;
     87	unsigned int nr_max_block;
     88	struct device dev;
     89	struct {
     90		unsigned int persistence:4;
     91		unsigned int oper_state:4;
     92		unsigned int data_state:4;
     93		unsigned int rank:4;
     94		unsigned int release:1;
     95		unsigned int res_id:8;
     96	} __packed attrs;
     97};
     98
     99#define OP_STATE_GOOD		1
    100#define OP_STATE_TEMP_ERR	2
    101#define OP_STATE_PERM_ERR	3
    102
    103enum scm_event {SCM_CHANGE, SCM_AVAIL};
    104
    105struct scm_driver {
    106	struct device_driver drv;
    107	int (*probe) (struct scm_device *scmdev);
    108	void (*remove) (struct scm_device *scmdev);
    109	void (*notify) (struct scm_device *scmdev, enum scm_event event);
    110	void (*handler) (struct scm_device *scmdev, void *data,
    111			blk_status_t error);
    112};
    113
    114int scm_driver_register(struct scm_driver *scmdrv);
    115void scm_driver_unregister(struct scm_driver *scmdrv);
    116
    117int eadm_start_aob(struct aob *aob);
    118void scm_irq_handler(struct aob *aob, blk_status_t error);
    119
    120#endif /* _ASM_S390_EADM_H */