On Mon, Feb 07, 2022 at 03:21:01PM +0000, Mark Brown wrote: > The Scalable Matrix Extension adds a new system register TPIDR2 intended to > be used by libc for its own thread specific use, add some kselftests which > exercise the ABI for it. > > Since this test should with some adjustment work for TPIDR and any other > similar registers added in future add tests for it in a separate > directory rather than placing it with the other floating point tests, > nothing existing looked suitable so I created a new test directory > called "abi". > > Since this feature is intended to be used by libc the test is built as > freestanding code using nolibc so we don't end up with the test program > and libc both trying to manage the register simultaneously and > distrupting each other. As a result of being written using nolibc rather > than using hwcaps to identify if SME is available in the system we check > for the default SME vector length configuration in proc, adding hwcap > support to nolibc seems like disproportionate effort and didn't feel > entirely idiomatic for what nolibc is trying to do. > > Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
