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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 macros6 * required for all the DEXCR related test cases.7 */8#ifndef _SELFTESTS_POWERPC_DEXCR_DEXCR_H9#define _SELFTESTS_POWERPC_DEXCR_DEXCR_H10 11#include <stdbool.h>12#include <sys/prctl.h>13#include <sys/types.h>14 15#include "reg.h"16 17#define DEXCR_PR_BIT(aspect) __MASK(63 - (32 + (aspect)))18#define DEXCR_PR_SBHE DEXCR_PR_BIT(0)19#define DEXCR_PR_IBRTPD DEXCR_PR_BIT(3)20#define DEXCR_PR_SRAPD DEXCR_PR_BIT(4)21#define DEXCR_PR_NPHIE DEXCR_PR_BIT(5)22 23#define PPC_RAW_HASH_ARGS(b, i, a) \24 ((((i) >> 3) & 0x1F) << 21 | (a) << 16 | (b) << 11 | (((i) >> 8) & 0x1))25#define PPC_RAW_HASHST(b, i, a) \26 str(.long (0x7C0005A4 | PPC_RAW_HASH_ARGS(b, i, a));)27#define PPC_RAW_HASHCHK(b, i, a) \28 str(.long (0x7C0005E4 | PPC_RAW_HASH_ARGS(b, i, a));)29 30struct dexcr_aspect {31 const char *name; /* Short display name */32 const char *opt; /* Option name for chdexcr */33 const char *desc; /* Expanded aspect meaning */34 unsigned int index; /* Aspect bit index in DEXCR */35 unsigned long prctl; /* 'which' value for get/set prctl */36};37 38static const struct dexcr_aspect aspects[] = {39 {40 .name = "SBHE",41 .opt = "sbhe",42 .desc = "Speculative branch hint enable",43 .index = 0,44 .prctl = PR_PPC_DEXCR_SBHE,45 },46 {47 .name = "IBRTPD",48 .opt = "ibrtpd",49 .desc = "Indirect branch recurrent target prediction disable",50 .index = 3,51 .prctl = PR_PPC_DEXCR_IBRTPD,52 },53 {54 .name = "SRAPD",55 .opt = "srapd",56 .desc = "Subroutine return address prediction disable",57 .index = 4,58 .prctl = PR_PPC_DEXCR_SRAPD,59 },60 {61 .name = "NPHIE",62 .opt = "nphie",63 .desc = "Non-privileged hash instruction enable",64 .index = 5,65 .prctl = PR_PPC_DEXCR_NPHIE,66 },67 {68 .name = "PHIE",69 .opt = "phie",70 .desc = "Privileged hash instruction enable",71 .index = 6,72 .prctl = -1,73 },74};75 76bool dexcr_exists(void);77 78bool pr_dexcr_aspect_supported(unsigned long which);79 80bool pr_dexcr_aspect_editable(unsigned long which);81 82int pr_get_dexcr(unsigned long pr_aspect);83 84int pr_set_dexcr(unsigned long pr_aspect, unsigned long ctrl);85 86unsigned int pr_which_to_aspect(unsigned long which);87 88bool hashchk_triggers(void);89 90enum dexcr_source {91 DEXCR, /* Userspace DEXCR value */92 HDEXCR, /* Hypervisor enforced DEXCR value */93 EFFECTIVE, /* Bitwise OR of UDEXCR and ENFORCED DEXCR bits */94};95 96unsigned int get_dexcr(enum dexcr_source source);97 98void await_child_success(pid_t pid);99 100void hashst(unsigned long lr, void *sp);101 102void hashchk(unsigned long lr, void *sp);103 104void do_bad_hashchk(void);105 106#endif /* _SELFTESTS_POWERPC_DEXCR_DEXCR_H */107