On Fri, 17 Jun 2022 14:39:35 +1000, Rashmica Gupta wrote:

The ISA states: "when ACC[i] contains defined data, the contents of VSRs
4×i to 4×i+3 are undefined until either a VSX Move From ACC instruction
is used to copy the contents of ACC[i] to VSRs 4×i to 4×i+3 or some other
instruction directly writes to one of these VSRs." We aren't doing this.

This test only works on Power10 because the hardware implementation
happens to map ACC0 to VSRs 0-3, but will fail on any other implementation
that doesn't do this. So add xxmfacc between writing to the accumulator
and accessing the VSRs.

[...]

Applied to powerpc/next.

[1/1] selftests/powerpc: Fix matrix multiply assist test
      https://git.kernel.org/powerpc/c/cd1e64935f79e31d666172c52c951ca97152b783

cheers