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MIPS: Warn if vector register partitioning is implemented 

No current systems implementing MSA include support for vector register
partitioning which makes it somewhat difficult to implement support for
it in the kernel. Thus for the moment the kernel includes no such
support. However if the kernel were to be run on a system which
implemented register partitioning then it would not function correctly,
mishandling MSA disabled exceptions. Print a warning if run on a system
with vector register partitioning implemented to indicate this problem
should it occur.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6494/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton 2014-01-28 14:28:43 +00:00 committed by Ralf Baechle
parent 2bcb3fbc3f
commit a8ad136789
1 changed files with 4 additions and 1 deletions
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5
arch/mips/kernel/cpu-probe.c
View File

@ -1195,8 +1195,11 @@ void cpu_probe(void)
else
c->srsets = 1;
if (cpu_has_msa)
if (cpu_has_msa) {
c->msa_id = cpu_get_msa_id();
WARN(c->msa_id & MSA_IR_WRPF,
"Vector register partitioning unimplemented!");
}
cpu_probe_vmbits(c);