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