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From: Will Deacon <will@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, misono.tomohiro@fujitsu.com
Subject: Re: [PATCH v2 0/4] selftests: arm64: vec-syscfg updates
Date: Wed, 29 Sep 2021 15:31:14 +0100	[thread overview]
Message-ID: <20210929143113.GA22029@willie-the-truck> (raw)
In-Reply-To: <20210917120855.13858-1-broonie@kernel.org>

On Fri, Sep 17, 2021 at 01:08:51PM +0100, Mark Brown wrote:
> This series fixes up a few issues introduced into vec-syscfg during
> refactoring in the review process, then adds a new test which ensures
> that the behaviour when we attempt to set a vector length which is not
> supported by the current system matches what is documented in the SVE
> ABI documentation.
> 
> v2:
>  - Fix handling of missing VLs when checking that vector length setting
>    works as expected.

With this series applied, I see a test failing under qemu with:

# selftests: arm64: vec-syscfg
# TAP version 13
# 1..10
# ok 1 SVE default vector length 64
# ok 2 # SKIP Need to be root to write to /proc
# ok 3 # SKIP Need to be root to write to /proc
# ok 4 SVE current VL is 64
# ok 5 SVE set VL 64 and have VL 64
# ok 6 # SKIP SVE only one VL supported
# ok 7 # SKIP SVE only one VL supported
# ok 8 # SKIP SVE only one VL supported
# ok 9 # SKIP SVE only one VL supported
# # SVE VL 272 returned 256 not maximum 0
# # SVE VL 288 returned 256 not maximum 0
# # SVE VL 304 returned 256 not maximum 0
# # SVE VL 320 returned 256 not maximum 0
# # SVE VL 336 returned 256 not maximum 0
# # SVE VL 352 returned 256 not maximum 0

[repeat similar messages for ages]

  # SVE VL 8160 returned 256 not maximum 0
# # SVE VL 8176 returned 256 not maximum 0
# # SVE VL 8192 returned 256 not maximum 0
# not ok 10 SVE prctl() set all VLs, 496 errors
# # Totals: pass:3 fail:1 xfail:0 xpass:0 skip:6 error:0

Will

WARNING: multiple messages have this Message-ID (diff)
From: Will Deacon <will@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Shuah Khan <shuah@kernel.org>,
	Shuah Khan <skhan@linuxfoundation.org>,
	linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, misono.tomohiro@fujitsu.com
Subject: Re: [PATCH v2 0/4] selftests: arm64: vec-syscfg updates
Date: Wed, 29 Sep 2021 15:31:14 +0100	[thread overview]
Message-ID: <20210929143113.GA22029@willie-the-truck> (raw)
In-Reply-To: <20210917120855.13858-1-broonie@kernel.org>

On Fri, Sep 17, 2021 at 01:08:51PM +0100, Mark Brown wrote:
> This series fixes up a few issues introduced into vec-syscfg during
> refactoring in the review process, then adds a new test which ensures
> that the behaviour when we attempt to set a vector length which is not
> supported by the current system matches what is documented in the SVE
> ABI documentation.
> 
> v2:
>  - Fix handling of missing VLs when checking that vector length setting
>    works as expected.

With this series applied, I see a test failing under qemu with:

# selftests: arm64: vec-syscfg
# TAP version 13
# 1..10
# ok 1 SVE default vector length 64
# ok 2 # SKIP Need to be root to write to /proc
# ok 3 # SKIP Need to be root to write to /proc
# ok 4 SVE current VL is 64
# ok 5 SVE set VL 64 and have VL 64
# ok 6 # SKIP SVE only one VL supported
# ok 7 # SKIP SVE only one VL supported
# ok 8 # SKIP SVE only one VL supported
# ok 9 # SKIP SVE only one VL supported
# # SVE VL 272 returned 256 not maximum 0
# # SVE VL 288 returned 256 not maximum 0
# # SVE VL 304 returned 256 not maximum 0
# # SVE VL 320 returned 256 not maximum 0
# # SVE VL 336 returned 256 not maximum 0
# # SVE VL 352 returned 256 not maximum 0

[repeat similar messages for ages]

  # SVE VL 8160 returned 256 not maximum 0
# # SVE VL 8176 returned 256 not maximum 0
# # SVE VL 8192 returned 256 not maximum 0
# not ok 10 SVE prctl() set all VLs, 496 errors
# # Totals: pass:3 fail:1 xfail:0 xpass:0 skip:6 error:0

Will

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  parent reply	other threads:[~2021-09-29 14:31 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-17 12:08 [PATCH v2 0/4] selftests: arm64: vec-syscfg updates Mark Brown
2021-09-17 12:08 ` Mark Brown
2021-09-17 12:08 ` [PATCH v2 1/4] selftests: arm64: Fix printf() format mismatch in vec-syscfg Mark Brown
2021-09-17 12:08   ` Mark Brown
2021-09-17 12:08 ` [PATCH v2 2/4] selftests: arm64: Remove bogus error check on writing to files Mark Brown
2021-09-17 12:08   ` Mark Brown
2021-09-17 12:08 ` [PATCH v2 3/4] selftests: arm64: Fix and enable test for setting current VL in vec-syscfg Mark Brown
2021-09-17 12:08   ` Mark Brown
2021-09-17 12:08 ` [PATCH v2 4/4] selftests: arm64: Verify that all possible vector lengths are handled Mark Brown
2021-09-17 12:08   ` Mark Brown
2021-09-17 12:26   ` misono.tomohiro
2021-09-17 12:26     ` misono.tomohiro
2021-09-29 14:31 ` Will Deacon [this message]
2021-09-29 14:31   ` [PATCH v2 0/4] selftests: arm64: vec-syscfg updates Will Deacon
2021-09-29 14:43   ` Mark Brown
2021-09-29 14:43     ` Mark Brown
2021-09-29 15:35     ` Will Deacon
2021-09-29 15:35       ` Will Deacon
2021-09-29 15:38       ` Mark Brown
2021-09-29 15:38         ` Mark Brown
2021-09-29 16:26       ` Shuah Khan
2021-09-29 16:26         ` Shuah Khan
2021-09-29 16:37         ` Mark Brown
2021-09-29 16:37           ` Mark Brown
2021-09-29 18:23           ` Shuah Khan
2021-09-29 18:23             ` Shuah Khan

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