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Andre Przywara f38f972e14 kselftest/arm64: mte: Fix MTE feature detection 
[ Upstream commit 592432862c ]

To check whether the CPU and kernel support the MTE features we want
to test, we use an (emulated) CPU ID register read. However we only
check against a very particular feature version (0b0010), even though
the ARM ARM promises ID register features to be backwards compatible.

While this could be fixed by using ">=" instead of "==", we should
actually use the explicit HWCAP2_MTE hardware capability, exposed by the
kernel via the ELF auxiliary vectors.

That moves this responsibility to the kernel, and fixes running the
tests on machines with FEAT_MTE3 capability.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Mark Brown <broone@kernel.org>
Link: https://lore.kernel.org/r/20210319165334.29213-7-andre.przywara@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2021-05-11 14:47:18 +02:00
..
fault-injection docs: fault-injection: convert docs to ReST and rename to *.rst 2019-06-14 14:21:07 -06:00
ktest ktest.pl: Fix the logic for truncating the size of the log file for email 2020-12-21 13:30:06 +01:00
kunit kunit: tool: Fix a python tuple typing error 2021-04-10 13:36:08 +02:00
nvdimm device-dax: add dis-contiguous resource support 2020-10-13 18:38:28 -07:00
radix-tree idr test suite: Create anchor before launching throbber 2021-04-16 11:43:21 +02:00
scatterlist tools/testing/scatterlist: Fix test to compile and run 2020-11-17 20:02:20 -04:00
selftests kselftest/arm64: mte: Fix MTE feature detection 2021-05-11 14:47:18 +02:00
vsock SPDX patches for 5.7-rc1. 2020-04-03 13:12:26 -07:00