On Wed, 28 Sep 2022 16:45:17 +0100, Mark Brown wrote:
> Currently we set -march=armv8.5+memtag when building the MTE selftests,
> allowing the compiler to emit v8.5 and MTE instructions for anything it
> generates. This means that we may get code that will generate SIGILLs when
> run on older systems rather than skipping on non-MTE systems as should be
> the case. Most toolchains don't select any incompatible instructions but
> I have seen some reports which suggest that some may be appearing which do
> so. This is also potentially problematic in that if the compiler chooses to
> emit any MTE instructions for the C code it may interfere with the MTE
> usage we are trying to test.
>
> [...]
Applied to arm64 (for-next/kselftest), thanks!
[1/1] kselftest/arm64: Don't enable v8.5 for MTE selftest builds
https://git.kernel.org/arm64/c/55c8a987dd73
--
Catalin
