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Commit 11508074 authored by Anshuman Khandual's avatar Anshuman Khandual Committed by Michael Ellerman
Browse files

selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM 



This patch adds ptrace interface test for VSX, VMX registers
inside TM context. This also adds ptrace interface based helper
functions related to chckpointed VSX, VMX registers access.

Signed-off-by: default avatarAnshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: default avatarSimon Guo <wei.guo.simon@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 0da535c0

tools/testing/selftests/powerpc/ptrace/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -5,3 +5,4 @@ ptrace-tar 
ptrace-tm-tar

ptrace-tm-spd-tar

ptrace-vsx

ptrace-tm-vsx

tools/testing/selftests/powerpc/ptrace/Makefile

+1 −1
Original line number Diff line number Diff line 
TEST_PROGS := ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \

              ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx

              ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx



include ../../lib.mk

tools/testing/selftests/powerpc/ptrace/ptrace-tm-vsx.c

0 → 100644
+168 −0
Original line number Diff line number Diff line 
/*

 * Ptrace test for VMX/VSX registers in the TM context

 *

 * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.

 *

 * 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.

 */

#include "ptrace.h"

#include "tm.h"

#include "ptrace-vsx.h"



int shm_id;

unsigned long *cptr, *pptr;



unsigned long fp_load[VEC_MAX];

unsigned long fp_store[VEC_MAX];

unsigned long fp_load_ckpt[VEC_MAX];

unsigned long fp_load_ckpt_new[VEC_MAX];



__attribute__((used)) void load_vsx(void)

{

	loadvsx(fp_load, 0);

}



__attribute__((used)) void load_vsx_ckpt(void)

{

	loadvsx(fp_load_ckpt, 0);

}



void tm_vsx(void)

{

	unsigned long result, texasr;

	int ret;



	cptr = (unsigned long *)shmat(shm_id, NULL, 0);



trans:

	cptr[1] = 0;

	asm __volatile__(

		"bl load_vsx_ckpt;"



		"1: ;"

		"tbegin.;"

		"beq 2f;"



		"bl load_vsx;"

		"tsuspend.;"

		"li 7, 1;"

		"stw 7, 0(%[cptr1]);"

		"tresume.;"

		"b .;"



		"tend.;"

		"li 0, 0;"

		"ori %[res], 0, 0;"

		"b 3f;"



		"2: ;"

		"li 0, 1;"

		"ori %[res], 0, 0;"

		"mfspr %[texasr], %[sprn_texasr];"



		"3: ;"

		: [res] "=r" (result), [texasr] "=r" (texasr)

		: [fp_load] "r" (fp_load), [fp_load_ckpt] "r" (fp_load_ckpt),

		[sprn_texasr] "i"  (SPRN_TEXASR), [cptr1] "r" (&cptr[1])

		: "memory", "r0", "r1", "r2", "r3", "r4",

		"r7", "r8", "r9", "r10", "r11"

		);



	if (result) {

		if (!cptr[0])

			goto trans;



		shmdt((void *)cptr);

		storevsx(fp_store, 0);

		ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);

		if (ret)

			exit(1);

		exit(0);

	}

	shmdt((void *)cptr);

	exit(1);

}



int trace_tm_vsx(pid_t child)

{

	unsigned long vsx[VSX_MAX];

	unsigned long vmx[VMX_MAX + 2][2];



	FAIL_IF(start_trace(child));

	FAIL_IF(show_vsx(child, vsx));

	FAIL_IF(validate_vsx(vsx, fp_load));

	FAIL_IF(show_vmx(child, vmx));

	FAIL_IF(validate_vmx(vmx, fp_load));

	FAIL_IF(show_vsx_ckpt(child, vsx));

	FAIL_IF(validate_vsx(vsx, fp_load_ckpt));

	FAIL_IF(show_vmx_ckpt(child, vmx));

	FAIL_IF(validate_vmx(vmx, fp_load_ckpt));

	memset(vsx, 0, sizeof(vsx));

	memset(vmx, 0, sizeof(vmx));



	load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);



	FAIL_IF(write_vsx_ckpt(child, vsx));

	FAIL_IF(write_vmx_ckpt(child, vmx));

	pptr[0] = 1;

	FAIL_IF(stop_trace(child));

	return TEST_PASS;

}



int ptrace_tm_vsx(void)

{

	pid_t pid;

	int ret, status, i;



	SKIP_IF(!have_htm());

	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);



	for (i = 0; i < 128; i++) {

		fp_load[i] = 1 + rand();

		fp_load_ckpt[i] = 1 + 2 * rand();

		fp_load_ckpt_new[i] = 1 + 3 * rand();

	}



	pid = fork();

	if (pid < 0) {

		perror("fork() failed");

		return TEST_FAIL;

	}



	if (pid == 0)

		tm_vsx();



	if (pid) {

		pptr = (unsigned long *)shmat(shm_id, NULL, 0);

		while (!pptr[1])

			asm volatile("" : : : "memory");



		ret = trace_tm_vsx(pid);

		if (ret) {

			kill(pid, SIGKILL);

			shmdt((void *)pptr);

			shmctl(shm_id, IPC_RMID, NULL);

			return TEST_FAIL;

		}



		shmdt((void *)pptr);

		ret = wait(&status);

		shmctl(shm_id, IPC_RMID, NULL);

		if (ret != pid) {

			printf("Child's exit status not captured\n");

			return TEST_FAIL;

		}



		return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :

			TEST_PASS;

	}

	return TEST_PASS;

}



int main(int argc, char *argv[])

{

	return test_harness(ptrace_tm_vsx, "ptrace_tm_vsx");

}