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    Subject[PATCH v15 12/15] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM
    Date
    From: Anshuman Khandual <khandual@linux.vnet.ibm.com>

    This patch adds ptrace interface test for VSX, VMX registers
    inside suspended TM context.

    Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
    Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
    ---
    tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
    .../selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c | 185 +++++++++++++++++++++
    2 files changed, 187 insertions(+), 1 deletion(-)
    create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c

    diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile b/tools/testing/selftests/powerpc/ptrace/Makefile
    index a518fbd..b5b097a 100644
    --- a/tools/testing/selftests/powerpc/ptrace/Makefile
    +++ b/tools/testing/selftests/powerpc/ptrace/Makefile
    @@ -1,5 +1,6 @@
    TEST_PROGS := ptrace-ebb ptrace-gpr ptrace-tm-gpr ptrace-tm-spd-gpr \
    -ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx
    +ptrace-tar ptrace-tm-tar ptrace-tm-spd-tar ptrace-vsx ptrace-tm-vsx \
    +ptrace-tm-spd-vsx


    include ../../lib.mk
    diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
    new file mode 100644
    index 0000000..0df3c23
    --- /dev/null
    +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-vsx.c
    @@ -0,0 +1,185 @@
    +/*
    + * Ptrace test for VMX/VSX registers in the TM Suspend 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;
    +int *cptr, *pptr;
    +
    +unsigned long fp_load[VEC_MAX];
    +unsigned long fp_load_new[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_new(void)
    +{
    + loadvsx(fp_load_new, 0);
    +}
    +
    +__attribute__((used)) void load_vsx_ckpt(void)
    +{
    + loadvsx(fp_load_ckpt, 0);
    +}
    +
    +__attribute__((used)) void wait_parent(void)
    +{
    + cptr[2] = 1;
    + while (!cptr[1])
    + asm volatile("" : : : "memory");
    +}
    +
    +void tm_spd_vsx(void)
    +{
    + unsigned long result, texasr;
    + int ret;
    +
    + cptr = (int *)shmat(shm_id, NULL, 0);
    +
    +trans:
    + cptr[2] = 0;
    + asm __volatile__(
    + "bl load_vsx_ckpt;"
    +
    + "1: ;"
    + "tbegin.;"
    + "beq 2f;"
    +
    + "bl load_vsx_new;"
    + "tsuspend.;"
    + "bl load_vsx;"
    + "bl wait_parent;"
    + "tresume.;"
    +
    + "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)
    + : "memory", "r0", "r1", "r2", "r3", "r4",
    + "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_spd_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;
    + pptr[1] = 1;
    + FAIL_IF(stop_trace(child));
    +
    + return TEST_PASS;
    +}
    +
    +int ptrace_tm_spd_vsx(void)
    +{
    + pid_t pid;
    + int ret, status, i;
    +
    + SKIP_IF(!have_htm());
    + shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
    +
    + for (i = 0; i < 128; i++) {
    + fp_load[i] = 1 + rand();
    + fp_load_new[i] = 1 + 2 * rand();
    + fp_load_ckpt[i] = 1 + 3 * rand();
    + fp_load_ckpt_new[i] = 1 + 4 * rand();
    + }
    +
    + pid = fork();
    + if (pid < 0) {
    + perror("fork() failed");
    + return TEST_FAIL;
    + }
    +
    + if (pid == 0)
    + tm_spd_vsx();
    +
    + if (pid) {
    + pptr = (int *)shmat(shm_id, NULL, 0);
    + while (!pptr[2])
    + asm volatile("" : : : "memory");
    +
    + ret = trace_tm_spd_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_spd_vsx, "ptrace_tm_spd_vsx");
    +}
    --
    1.8.3.1
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