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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chp.h (1948B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 *    Copyright IBM Corp. 2007, 2010
      4 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
      5 */
      6
      7#ifndef S390_CHP_H
      8#define S390_CHP_H
      9
     10#include <linux/types.h>
     11#include <linux/device.h>
     12#include <linux/mutex.h>
     13#include <asm/chpid.h>
     14#include "chsc.h"
     15#include "css.h"
     16
     17#define CHP_STATUS_STANDBY		0
     18#define CHP_STATUS_CONFIGURED		1
     19#define CHP_STATUS_RESERVED		2
     20#define CHP_STATUS_NOT_RECOGNIZED	3
     21
     22#define CHP_ONLINE 0
     23#define CHP_OFFLINE 1
     24#define CHP_VARY_ON 2
     25#define CHP_VARY_OFF 3
     26#define CHP_FCES_EVENT 4
     27
     28struct chp_link {
     29	struct chp_id chpid;
     30	u32 fla_mask;
     31	u16 fla;
     32};
     33
     34static inline int chp_test_bit(u8 *bitmap, int num)
     35{
     36	int byte = num >> 3;
     37	int mask = 128 >> (num & 7);
     38
     39	return (bitmap[byte] & mask) ? 1 : 0;
     40}
     41
     42
     43struct channel_path {
     44	struct device dev;
     45	struct chp_id chpid;
     46	struct mutex lock; /* Serialize access to below members. */
     47	int state;
     48	struct channel_path_desc_fmt0 desc;
     49	struct channel_path_desc_fmt1 desc_fmt1;
     50	struct channel_path_desc_fmt3 desc_fmt3;
     51	/* Channel-measurement related stuff: */
     52	int cmg;
     53	int shared;
     54	struct cmg_chars cmg_chars;
     55};
     56
     57/* Return channel_path struct for given chpid. */
     58static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
     59{
     60	return css_by_id(chpid.cssid)->chps[chpid.id];
     61}
     62
     63int chp_get_status(struct chp_id chpid);
     64u8 chp_get_sch_opm(struct subchannel *sch);
     65int chp_is_registered(struct chp_id chpid);
     66struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
     67void chp_remove_cmg_attr(struct channel_path *chp);
     68int chp_add_cmg_attr(struct channel_path *chp);
     69int chp_update_desc(struct channel_path *chp);
     70int chp_new(struct chp_id chpid);
     71void chp_cfg_schedule(struct chp_id chpid, int configure);
     72void chp_cfg_cancel_deconfigure(struct chp_id chpid);
     73int chp_info_get_status(struct chp_id chpid);
     74int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
     75#endif /* S390_CHP_H */