MIPS: Advertise MSA support via HWCAP when present

If MSA is supported by both the hardware & the kernel then advertise
that support to userland via the AT_HWCAP aux vector.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Matthew Fortune <matthew.fortune@imgtec.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-kernel@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/10799/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 380a14b8772eaf54b4b73c6205eccc4eb1514f4f..571a8e6ea5bd0048a840bc539135f27c32fec621 100644 (file)
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -1531,6 +1531,7 @@ void cpu_probe(void)
                c->msa_id = cpu_get_msa_id();
                WARN(c->msa_id & MSA_IR_WRPF,
                     "Vector register partitioning unimplemented!");
+               elf_hwcap |= HWCAP_MIPS_MSA;
        }
 
        cpu_probe_vmbits(c);