diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2014-03-27 10:57:30 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-31 18:17:12 +0200 |
| commit | 30ee615bb86ba640c9ec7f85fb95c1b0e31c41be (patch) | |
| tree | b756df1f38821bb46182fab185ebd2c4f5e0c86c /arch | |
| parent | 968a0734db05ad907bc8fffabdbe7da5e1e731f6 (diff) | |
| download | linux-30ee615bb86ba640c9ec7f85fb95c1b0e31c41be.tar.bz2 | |
MIPS: Fix core number detection for MT cores
In cores which implement the MT ASE, the CPUNum in the EBase register is
a concatenation of the core number & the VPE ID within that core. In
order to retrieve the correct core number CPUNum must be shifted
appropriately to remove the VPE ID bits.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6666/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index bd712c91f48b..6e8fb85ce7c3 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -23,6 +23,7 @@ #include <asm/cpu-type.h> #include <asm/fpu.h> #include <asm/mipsregs.h> +#include <asm/mipsmtregs.h> #include <asm/msa.h> #include <asm/watch.h> #include <asm/elf.h> @@ -421,8 +422,11 @@ static void decode_configs(struct cpuinfo_mips *c) mips_probe_watch_registers(c); #ifndef CONFIG_MIPS_CPS - if (cpu_has_mips_r2) + if (cpu_has_mips_r2) { c->core = read_c0_ebase() & 0x3ff; + if (cpu_has_mipsmt) + c->core >>= fls(core_nvpes()) - 1; + } #endif } |