diff options
author | Rashmica Gupta <rashmica@linux.ibm.com> | 2022-06-17 14:39:35 +1000 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-07-28 16:22:15 +1000 |
commit | cd1e64935f79e31d666172c52c951ca97152b783 (patch) | |
tree | 687dc9bb87d88ea70771ed1c054666bd71597e27 /arch/powerpc | |
parent | e4787e71ae2de3f60bc04fe09d1be4ef628b6c68 (diff) |
selftests/powerpc: Fix matrix multiply assist test
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.
Fixes: 3527e1ab9a79 ("selftests/powerpc: Add matrix multiply assist (MMA) test")
Signed-off-by: Rashmica Gupta <rashmica@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220617043935.428083-1-rashmica@linux.ibm.com
Diffstat (limited to 'arch/powerpc')
0 files changed, 0 insertions, 0 deletions