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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Ptrace test for VMX/VSX registers in the TM Suspend context4 *5 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.6 */7#include "ptrace.h"8#include "tm.h"9#include "ptrace-vsx.h"10 11int shm_id;12int *cptr, *pptr;13 14unsigned long fp_load[VEC_MAX];15unsigned long fp_load_new[VEC_MAX];16unsigned long fp_store[VEC_MAX];17unsigned long fp_load_ckpt[VEC_MAX];18unsigned long fp_load_ckpt_new[VEC_MAX];19 20__attribute__((used)) void load_vsx(void)21{22	loadvsx(fp_load, 0);23}24 25__attribute__((used)) void load_vsx_new(void)26{27	loadvsx(fp_load_new, 0);28}29 30__attribute__((used)) void load_vsx_ckpt(void)31{32	loadvsx(fp_load_ckpt, 0);33}34 35__attribute__((used)) void wait_parent(void)36{37	cptr[2] = 1;38	while (!cptr[1])39		asm volatile("" : : : "memory");40}41 42void tm_spd_vsx(void)43{44	unsigned long result, texasr;45	int ret;46 47	cptr = (int *)shmat(shm_id, NULL, 0);48 49trans:50	cptr[2] = 0;51	asm __volatile__(52		"bl load_vsx_ckpt;"53 54		"1: ;"55		"tbegin.;"56		"beq 2f;"57 58		"bl load_vsx_new;"59		"tsuspend.;"60		"bl load_vsx;"61		"bl wait_parent;"62		"tresume.;"63 64		"tend.;"65		"li 0, 0;"66		"ori %[res], 0, 0;"67		"b 3f;"68 69		"2: ;"70		"li 0, 1;"71		"ori %[res], 0, 0;"72		"mfspr %[texasr], %[sprn_texasr];"73 74		"3: ;"75		: [res] "=r" (result), [texasr] "=r" (texasr)76		: [sprn_texasr] "i"  (SPRN_TEXASR)77		: "memory", "r0", "r3", "r4",78		  "r7", "r8", "r9", "r10", "r11", "lr"79		);80 81	if (result) {82		if (!cptr[0])83			goto trans;84		shmdt((void *)cptr);85 86		storevsx(fp_store, 0);87		ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);88		if (ret)89			exit(1);90		exit(0);91	}92	shmdt((void *)cptr);93	exit(1);94}95 96int trace_tm_spd_vsx(pid_t child)97{98	unsigned long vsx[VSX_MAX];99	unsigned long vmx[VMX_MAX + 2][2];100 101	FAIL_IF(start_trace(child));102	FAIL_IF(show_vsx(child, vsx));103	FAIL_IF(validate_vsx(vsx, fp_load));104	FAIL_IF(show_vmx(child, vmx));105	FAIL_IF(validate_vmx(vmx, fp_load));106	FAIL_IF(show_vsx_ckpt(child, vsx));107	FAIL_IF(validate_vsx(vsx, fp_load_ckpt));108	FAIL_IF(show_vmx_ckpt(child, vmx));109	FAIL_IF(validate_vmx(vmx, fp_load_ckpt));110 111	memset(vsx, 0, sizeof(vsx));112	memset(vmx, 0, sizeof(vmx));113 114	load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);115 116	FAIL_IF(write_vsx_ckpt(child, vsx));117	FAIL_IF(write_vmx_ckpt(child, vmx));118 119	pptr[0] = 1;120	pptr[1] = 1;121	FAIL_IF(stop_trace(child));122 123	return TEST_PASS;124}125 126int ptrace_tm_spd_vsx(void)127{128	pid_t pid;129	int ret, status, i;130 131	SKIP_IF_MSG(!have_htm(), "Don't have transactional memory");132	SKIP_IF_MSG(htm_is_synthetic(), "Transactional memory is synthetic");133	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);134 135	for (i = 0; i < 128; i++) {136		fp_load[i] = 1 + rand();137		fp_load_new[i] = 1 + 2 * rand();138		fp_load_ckpt[i] = 1 + 3 * rand();139		fp_load_ckpt_new[i] = 1 + 4 * rand();140	}141 142	pid = fork();143	if (pid < 0) {144		perror("fork() failed");145		return TEST_FAIL;146	}147 148	if (pid == 0)149		tm_spd_vsx();150 151	if (pid) {152		pptr = (int *)shmat(shm_id, NULL, 0);153		while (!pptr[2])154			asm volatile("" : : : "memory");155 156		ret = trace_tm_spd_vsx(pid);157		if (ret) {158			kill(pid, SIGKILL);159			shmdt((void *)pptr);160			shmctl(shm_id, IPC_RMID, NULL);161			return TEST_FAIL;162		}163 164		shmdt((void *)pptr);165		ret = wait(&status);166		shmctl(shm_id, IPC_RMID, NULL);167		if (ret != pid) {168			printf("Child's exit status not captured\n");169			return TEST_FAIL;170		}171 172		return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :173			TEST_PASS;174	}175	return TEST_PASS;176}177 178int main(int argc, char *argv[])179{180	return test_harness(ptrace_tm_spd_vsx, "ptrace_tm_spd_vsx");181}182