1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * POWER Dynamic Execution Control Facility (DEXCR)
 4 *
 5 * This header file contains helper functions and macros
 6 * required for all the DEXCR related test cases.
 7 */
 8#ifndef _SELFTESTS_POWERPC_DEXCR_DEXCR_H
 9#define _SELFTESTS_POWERPC_DEXCR_DEXCR_H
10
11#include <stdbool.h>
12#include <sys/types.h>
13
14#include "reg.h"
15
16#define DEXCR_PR_BIT(aspect)	__MASK(63 - (32 + (aspect)))
17#define DEXCR_PR_SBHE		DEXCR_PR_BIT(0)
18#define DEXCR_PR_IBRTPD		DEXCR_PR_BIT(3)
19#define DEXCR_PR_SRAPD		DEXCR_PR_BIT(4)
20#define DEXCR_PR_NPHIE		DEXCR_PR_BIT(5)
21
22#define PPC_RAW_HASH_ARGS(b, i, a) \
23	((((i) >> 3) & 0x1F) << 21 | (a) << 16 | (b) << 11 | (((i) >> 8) & 0x1))
24#define PPC_RAW_HASHST(b, i, a) \
25	str(.long (0x7C0005A4 | PPC_RAW_HASH_ARGS(b, i, a));)
26#define PPC_RAW_HASHCHK(b, i, a) \
27	str(.long (0x7C0005E4 | PPC_RAW_HASH_ARGS(b, i, a));)
28
29bool dexcr_exists(void);
30
31bool hashchk_triggers(void);
32
33enum dexcr_source {
34	DEXCR,		/* Userspace DEXCR value */
35	HDEXCR,		/* Hypervisor enforced DEXCR value */
36	EFFECTIVE,	/* Bitwise OR of UDEXCR and ENFORCED DEXCR bits */
37};
38
39unsigned int get_dexcr(enum dexcr_source source);
40
41void await_child_success(pid_t pid);
42
43void hashst(unsigned long lr, void *sp);
44
45void hashchk(unsigned long lr, void *sp);
46
47void do_bad_hashchk(void);
48
49#endif  /* _SELFTESTS_POWERPC_DEXCR_DEXCR_H */