From: Cristian Marussi <cristian.marussi@arm•com>
To: Dave Martin <Dave.Martin@arm•com>
Cc: andreyknvl@google•com, shuah@kernel•org,
linux-arm-kernel@lists•infradead.org,
linux-kselftest@vger•kernel.org
Subject: Re: [PATCH v3 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el
Date: Thu, 29 Aug 2019 12:50:04 +0100 [thread overview]
Message-ID: <91b30d04-e044-6b15-9435-0c1351e2af85@arm.com> (raw)
In-Reply-To: <20190813162451.GB10425@arm.com>
On 13/08/2019 17:24, Dave Martin wrote:
> On Fri, Aug 02, 2019 at 06:02:53PM +0100, Cristian Marussi wrote:
>> Added 3 simple mangle testcases that mess with the ucontext_t
>
> Add
>
>> from within the sig_handler, trying to toggle PSTATE mode bits to
>
> signal handler
>
>> trick the system into switching to EL1/EL2/EL3. Expects SIGSEGV
>> on test PASS.
Ok
>>
>> Signed-off-by: Cristian Marussi <cristian.marussi@arm•com>
>> ---
>> .../arm64/signal/testcases/.gitignore | 3 ++
>> .../mangle_pstate_invalid_mode_el1.c | 29 +++++++++++++++++++
>> .../mangle_pstate_invalid_mode_el2.c | 29 +++++++++++++++++++
>> .../mangle_pstate_invalid_mode_el3.c | 29 +++++++++++++++++++
>> 4 files changed, 90 insertions(+)
>> create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c
>> create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el2.c
>> create mode 100644 tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el3.c
>>
>> diff --git a/tools/testing/selftests/arm64/signal/testcases/.gitignore b/tools/testing/selftests/arm64/signal/testcases/.gitignore
>> index 8a0a29f0cc2a..226bb179b673 100644
>> --- a/tools/testing/selftests/arm64/signal/testcases/.gitignore
>> +++ b/tools/testing/selftests/arm64/signal/testcases/.gitignore
>> @@ -1,2 +1,5 @@
>> mangle_pstate_invalid_compat_toggle
>> mangle_pstate_invalid_daif_bits
>> +mangle_pstate_invalid_mode_el1
>> +mangle_pstate_invalid_mode_el2
>> +mangle_pstate_invalid_mode_el3
>
> What about having
>
> !*.[ch]
> mangle_*
>
> rather than having to update .gitignore to list every test executable?
>
Yes it reduces inter-dependencies between testcases patches in fact,
and in fact I already know all the possible name patterns on this set of tests:
mangle_ fake_sigreturn_
>> diff --git a/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c
>> new file mode 100644
>> index 000000000000..07aed7624383
>> --- /dev/null
>> +++ b/tools/testing/selftests/arm64/signal/testcases/mangle_pstate_invalid_mode_el1.c
>> @@ -0,0 +1,29 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/* Copyright (C) 2019 ARM Limited */
>> +
>> +#include "test_signals_utils.h"
>> +#include "testcases.h"
>> +
>> +static int mangle_invalid_pstate_run(struct tdescr *td, siginfo_t *si,
>> + ucontext_t *uc)
>> +{
>> + ASSERT_GOOD_CONTEXT(uc);
>> +
>> + /*
>> + * This config should trigger a SIGSEGV by Kernel
>> + * when checking valid_user_regs()
>> + */
>> + uc->uc_mcontext.pstate &= ~PSR_MODE_MASK;
>> + uc->uc_mcontext.pstate |= PSR_MODE_EL1t;
>> +
>> + return 1;
>> +}
>> +
>> +struct tdescr tde = {
>> + .sanity_disabled = true,
>> + .name = "MANGLE_PSTATE_INVALID_MODE_EL1t",
>> + .descr = "Mangling uc_mcontext with INVALID MODE EL1t",
>> + .sig_trig = SIGUSR1,
>> + .sig_ok = SIGSEGV,
>> + .run = mangle_invalid_pstate_run,
>> +};
>
> These tests seem identical except for the EL number.
> Can we macro-ise them?
>
> mangle_pstate_invalid_mode_el1.c could become
>
> --8<--
>
> #include "mangle_pstate_invalid_mode.h"
>
> DEFINE_TESTCASE_MANGLE_PSTATE_INVALID_MODE(1)
>
> -->8--
Yes I'll do, and I'll split these 3 testcases in 6 macro-ized test cases to cover
all EL_x h/t variants (something you already told me in V2 I think)
Cheers
Cristian
>
> (for example).
>
> [...]
>
> Cheers
> ---Dave
>
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next prev parent reply other threads:[~2019-08-29 11:50 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-02 17:02 [PATCH v3 00/11] Add arm64/signal initial kselftest support Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 01/11] kselftest: arm64: introduce new boilerplate code Cristian Marussi
2019-08-13 16:23 ` Dave Martin
2019-08-27 12:14 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 02/11] kselftest: arm64: adds first test and common utils Cristian Marussi
2019-08-06 15:50 ` Cristian Marussi
2019-08-07 15:42 ` Cristian Marussi
2019-08-09 10:54 ` Cristian Marussi
2019-08-09 11:16 ` Dave Martin
2019-08-09 12:20 ` Cristian Marussi
2019-08-09 12:32 ` Dave Martin
2019-08-12 12:43 ` Amit Kachhap
2019-08-13 13:22 ` Cristian Marussi
2019-08-14 10:22 ` Amit Kachhap
2019-08-27 14:24 ` Cristian Marussi
2019-08-13 16:24 ` Dave Martin
2019-08-28 17:34 ` Cristian Marussi
2019-09-03 15:34 ` Dave Martin
2019-09-03 16:08 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 03/11] kselftest: arm64: mangle_pstate_invalid_daif_bits Cristian Marussi
2019-08-13 16:24 ` Dave Martin
2019-08-29 10:19 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 04/11] kselftest: arm64: mangle_pstate_invalid_mode_el Cristian Marussi
2019-08-13 16:24 ` Dave Martin
2019-08-29 11:50 ` Cristian Marussi [this message]
2019-08-02 17:02 ` [PATCH v3 05/11] kselftest: arm64: mangle_pstate_ssbs_regs Cristian Marussi
2019-08-13 16:25 ` Dave Martin
2019-08-29 15:35 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 06/11] kselftest: arm64: fake_sigreturn_bad_magic Cristian Marussi
2019-08-13 16:25 ` Dave Martin
2019-08-30 14:29 ` Cristian Marussi
2019-09-04 10:05 ` Dave Martin
2019-09-04 10:37 ` Cristian Marussi
2019-09-04 10:47 ` Dave Martin
2019-08-02 17:02 ` [PATCH v3 07/11] kselftest: arm64: fake_sigreturn_bad_size_for_magic0 Cristian Marussi
2019-08-13 16:25 ` Dave Martin
2019-08-30 14:49 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 08/11] kselftest: arm64: fake_sigreturn_missing_fpsimd Cristian Marussi
2019-08-13 16:26 ` Dave Martin
2019-08-30 14:55 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 09/11] kselftest: arm64: fake_sigreturn_duplicated_fpsimd Cristian Marussi
2019-08-13 16:26 ` Dave Martin
2019-08-30 15:11 ` Cristian Marussi
2019-08-02 17:02 ` [PATCH v3 10/11] kselftest: arm64: fake_sigreturn_bad_size Cristian Marussi
2019-08-13 16:26 ` Dave Martin
2019-08-30 15:21 ` Cristian Marussi
2019-08-02 17:03 ` [PATCH v3 11/11] kselftest: arm64: fake_sigreturn_misaligned_sp Cristian Marussi
2019-08-07 16:04 ` Cristian Marussi
2019-08-13 16:28 ` Dave Martin
2019-08-30 15:22 ` Cristian Marussi
2019-08-13 16:27 ` Dave Martin
2019-08-30 16:33 ` Cristian Marussi
2019-08-13 16:22 ` [PATCH v3 00/11] Add arm64/signal initial kselftest support Dave Martin
2019-08-30 16:40 ` Cristian Marussi
2019-09-02 10:53 ` Dave Martin
2019-09-02 11:30 ` Cristian Marussi
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