On Mon, 2016-09-12 at 15:33 +0800, wei.guo.simon@xxxxxxxxx wrote:
> From: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
>
> This patch adds ptrace interface test for TM SPR registers. This
> also adds ptrace interface based helper functions related to TM
> SPR registers access.
>
I'm seeing this one fail a lot, it does occasionally succeed but fails
a lot on my test setup.
I use qemu on a power8 for most of my testing:
qemu-system-ppc64 --enable-kvm -machine pseries,accel=kvm,usb=off -m
4096 -realtime mlock=off -smp 4,sockets=1,cores=2,threads=2 -nographic
-vga none
> Signed-off-by: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
> Signed-off-by: Simon Guo <wei.guo.simon@xxxxxxxxx>
> ---
> tools/testing/selftests/powerpc/ptrace/Makefile | 3 +-
> .../selftests/powerpc/ptrace/ptrace-tm-spr.c | 186
> +++++++++++++++++++++
> tools/testing/selftests/powerpc/ptrace/ptrace.h | 35 ++++
> 3 files changed, 223 insertions(+), 1 deletion(-)
> create mode 100644 tools/testing/selftests/powerpc/ptrace/ptrace-tm-
> spr.c
>
> diff --git a/tools/testing/selftests/powerpc/ptrace/Makefile
> b/tools/testing/selftests/powerpc/ptrace/Makefile
> index 797840a..f34670e 100644
> --- a/tools/testing/selftests/powerpc/ptrace/Makefile
> +++ b/tools/testing/selftests/powerpc/ptrace/Makefile
> @@ -1,7 +1,8 @@
> 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-tm-spd-vsx
> +ptrace-tm-spd-vsx ptrace-tm-spr
>
> +include ../../lib.mk
>
> all: $(TEST_PROGS)
> CFLAGS += -m64
> diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
> b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
> new file mode 100644
> index 0000000..2863070
> --- /dev/null
> +++ b/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spr.c
> @@ -0,0 +1,186 @@
> +/*
> + * Ptrace test TM SPR registers
> + *
> + * 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"
> +
> +/* Tracee and tracer shared data */
> +struct shared {
> + int flag;
> + struct tm_spr_regs regs;
> +};
> +unsigned long tfhar;
> +
> +int shm_id;
> +volatile struct shared *cptr, *pptr;
> +
> +int shm_id1;
> +volatile int *cptr1, *pptr1;
> +
> +#define TM_SCHED 0xde0000018c000001
> +#define TM_KVM_SCHED 0xe0000001ac000001
> +
> +int validate_tm_spr(struct tm_spr_regs *regs)
> +{
> + if (regs->tm_tfhar != tfhar)
> + return TEST_FAIL;
> +
> + if ((regs->tm_texasr != TM_SCHED) && (regs->tm_texasr !=
> TM_KVM_SCHED))
> + return TEST_FAIL;
The above condition fails, should this test try again if this condition
is true, rather than fail?
> +
> + if ((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar !=
> 0))
> + return TEST_FAIL;
> +
> + return TEST_PASS;
> +}
> +
[snip]
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