MIPS: Set ELF AT_PLATFORM string for Loongson2 processors

Signed-off-by: Robert Millan <rmh@gnu.org>
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: David Daney <ddaney@caviumnetworks.com>
Cc: wu zhangjin <wuzhangjin@gmail.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2302/
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 7da861755f4f6b5840a78c38f3fe280fff8479d4..bb133d10b14566470ca8cd9bfb823126198076fc 100644 (file)
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -620,6 +620,16 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
        case PRID_IMP_LOONGSON2:
                c->cputype = CPU_LOONGSON2;
                __cpu_name[cpu] = "ICT Loongson-2";
+
+               switch (c->processor_id & PRID_REV_MASK) {
+               case PRID_REV_LOONGSON2E:
+                       set_elf_platform(cpu, "loongson2e");
+                       break;
+               case PRID_REV_LOONGSON2F:
+                       set_elf_platform(cpu, "loongson2f");
+                       break;
+               }
+
                c->isa_level = MIPS_CPU_ISA_III;
                c->options = R4K_OPTS |
                             MIPS_CPU_FPU | MIPS_CPU_LLSC |