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Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
164 lines
3.0 KiB
C
164 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Ptrace test TM SPR registers
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*
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* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
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*/
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#include "ptrace.h"
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#include "tm.h"
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/* Tracee and tracer shared data */
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struct shared {
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int flag;
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struct tm_spr_regs regs;
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};
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unsigned long tfhar;
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int shm_id;
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struct shared *cptr, *pptr;
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int shm_id1;
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int *cptr1, *pptr1;
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#define TM_KVM_SCHED 0xe0000001ac000001
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int validate_tm_spr(struct tm_spr_regs *regs)
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{
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FAIL_IF(regs->tm_tfhar != tfhar);
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FAIL_IF((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar != 0));
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return TEST_PASS;
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}
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void tm_spr(void)
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{
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unsigned long result, texasr;
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int ret;
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cptr = (struct shared *)shmat(shm_id, NULL, 0);
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cptr1 = (int *)shmat(shm_id1, NULL, 0);
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trans:
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cptr1[0] = 0;
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asm __volatile__(
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"1: ;"
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/* TM failover handler should follow "tbegin.;" */
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"mflr 31;"
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"bl 4f;" /* $ = TFHAR - 12 */
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"4: ;"
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"mflr %[tfhar];"
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"mtlr 31;"
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"tbegin.;"
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"beq 2f;"
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"tsuspend.;"
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"li 8, 1;"
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"sth 8, 0(%[cptr1]);"
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"tresume.;"
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"b .;"
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"tend.;"
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"li 0, 0;"
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"ori %[res], 0, 0;"
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"b 3f;"
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"2: ;"
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"li 0, 1;"
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"ori %[res], 0, 0;"
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"mfspr %[texasr], %[sprn_texasr];"
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"3: ;"
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: [tfhar] "=r" (tfhar), [res] "=r" (result),
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[texasr] "=r" (texasr), [cptr1] "=b" (cptr1)
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: [sprn_texasr] "i" (SPRN_TEXASR)
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: "memory", "r0", "r8", "r31"
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);
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/* There are 2 32bit instructions before tbegin. */
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tfhar += 12;
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if (result) {
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if (!cptr->flag)
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goto trans;
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ret = validate_tm_spr((struct tm_spr_regs *)&cptr->regs);
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shmdt((void *)cptr);
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shmdt((void *)cptr1);
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if (ret)
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exit(1);
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exit(0);
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}
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shmdt((void *)cptr);
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shmdt((void *)cptr1);
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exit(1);
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}
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int trace_tm_spr(pid_t child)
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{
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FAIL_IF(start_trace(child));
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FAIL_IF(show_tm_spr(child, (struct tm_spr_regs *)&pptr->regs));
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printf("TFHAR: %lx TEXASR: %lx TFIAR: %lx\n", pptr->regs.tm_tfhar,
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pptr->regs.tm_texasr, pptr->regs.tm_tfiar);
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pptr->flag = 1;
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FAIL_IF(stop_trace(child));
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return TEST_PASS;
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}
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int ptrace_tm_spr(void)
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{
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pid_t pid;
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int ret, status;
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SKIP_IF(!have_htm());
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shm_id = shmget(IPC_PRIVATE, sizeof(struct shared), 0777|IPC_CREAT);
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shm_id1 = shmget(IPC_PRIVATE, sizeof(int), 0777|IPC_CREAT);
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pid = fork();
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if (pid < 0) {
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perror("fork() failed");
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return TEST_FAIL;
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}
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if (pid == 0)
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tm_spr();
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if (pid) {
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pptr = (struct shared *)shmat(shm_id, NULL, 0);
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pptr1 = (int *)shmat(shm_id1, NULL, 0);
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while (!pptr1[0])
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asm volatile("" : : : "memory");
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ret = trace_tm_spr(pid);
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if (ret) {
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kill(pid, SIGKILL);
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shmdt((void *)pptr);
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shmdt((void *)pptr1);
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shmctl(shm_id, IPC_RMID, NULL);
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shmctl(shm_id1, IPC_RMID, NULL);
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return TEST_FAIL;
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}
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shmdt((void *)pptr);
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shmdt((void *)pptr1);
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ret = wait(&status);
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shmctl(shm_id, IPC_RMID, NULL);
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shmctl(shm_id1, IPC_RMID, NULL);
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if (ret != pid) {
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printf("Child's exit status not captured\n");
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return TEST_FAIL;
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}
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return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
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TEST_PASS;
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}
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return TEST_PASS;
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}
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int main(int argc, char *argv[])
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{
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return test_harness(ptrace_tm_spr, "ptrace_tm_spr");
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}
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