107 lines
2.6 KiB
C
107 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* POWER Dynamic Execution Control Facility (DEXCR)
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*
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* This header file contains helper functions and macros
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* required for all the DEXCR related test cases.
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*/
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#ifndef _SELFTESTS_POWERPC_DEXCR_DEXCR_H
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#define _SELFTESTS_POWERPC_DEXCR_DEXCR_H
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#include <stdbool.h>
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#include <sys/prctl.h>
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#include <sys/types.h>
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#include "reg.h"
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#define DEXCR_PR_BIT(aspect) __MASK(63 - (32 + (aspect)))
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#define DEXCR_PR_SBHE DEXCR_PR_BIT(0)
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#define DEXCR_PR_IBRTPD DEXCR_PR_BIT(3)
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#define DEXCR_PR_SRAPD DEXCR_PR_BIT(4)
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#define DEXCR_PR_NPHIE DEXCR_PR_BIT(5)
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#define PPC_RAW_HASH_ARGS(b, i, a) \
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((((i) >> 3) & 0x1F) << 21 | (a) << 16 | (b) << 11 | (((i) >> 8) & 0x1))
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#define PPC_RAW_HASHST(b, i, a) \
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str(.long (0x7C0005A4 | PPC_RAW_HASH_ARGS(b, i, a));)
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#define PPC_RAW_HASHCHK(b, i, a) \
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str(.long (0x7C0005E4 | PPC_RAW_HASH_ARGS(b, i, a));)
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struct dexcr_aspect {
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const char *name; /* Short display name */
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const char *opt; /* Option name for chdexcr */
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const char *desc; /* Expanded aspect meaning */
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unsigned int index; /* Aspect bit index in DEXCR */
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unsigned long prctl; /* 'which' value for get/set prctl */
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};
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static const struct dexcr_aspect aspects[] = {
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{
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.name = "SBHE",
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.opt = "sbhe",
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.desc = "Speculative branch hint enable",
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.index = 0,
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.prctl = PR_PPC_DEXCR_SBHE,
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},
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{
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.name = "IBRTPD",
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.opt = "ibrtpd",
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.desc = "Indirect branch recurrent target prediction disable",
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.index = 3,
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.prctl = PR_PPC_DEXCR_IBRTPD,
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},
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{
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.name = "SRAPD",
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.opt = "srapd",
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.desc = "Subroutine return address prediction disable",
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.index = 4,
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.prctl = PR_PPC_DEXCR_SRAPD,
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},
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{
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.name = "NPHIE",
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.opt = "nphie",
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.desc = "Non-privileged hash instruction enable",
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.index = 5,
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.prctl = PR_PPC_DEXCR_NPHIE,
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},
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{
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.name = "PHIE",
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.opt = "phie",
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.desc = "Privileged hash instruction enable",
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.index = 6,
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.prctl = -1,
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},
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};
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bool dexcr_exists(void);
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bool pr_dexcr_aspect_supported(unsigned long which);
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bool pr_dexcr_aspect_editable(unsigned long which);
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int pr_get_dexcr(unsigned long pr_aspect);
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int pr_set_dexcr(unsigned long pr_aspect, unsigned long ctrl);
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unsigned int pr_which_to_aspect(unsigned long which);
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bool hashchk_triggers(void);
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enum dexcr_source {
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DEXCR, /* Userspace DEXCR value */
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HDEXCR, /* Hypervisor enforced DEXCR value */
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EFFECTIVE, /* Bitwise OR of UDEXCR and ENFORCED DEXCR bits */
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};
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unsigned int get_dexcr(enum dexcr_source source);
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void await_child_success(pid_t pid);
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void hashst(unsigned long lr, void *sp);
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void hashchk(unsigned long lr, void *sp);
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void do_bad_hashchk(void);
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#endif /* _SELFTESTS_POWERPC_DEXCR_DEXCR_H */
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