diff options
| author | Atish Patra <atish.patra@wdc.com> | 2019-06-27 12:53:00 -0700 |
|---|---|---|
| committer | Paul Walmsley <paul.walmsley@sifive.com> | 2019-07-22 09:36:30 -0700 |
| commit | 03f11f03dbfe37c0bff2768b8f2e277a29ac62b9 (patch) | |
| tree | b040c074863a1c1c79799b6b5cd3a251d0ee0273 /arch/riscv/kernel | |
| parent | ca74b316df96d7c40ee3e8301065607c11c60c27 (diff) | |
RISC-V: Parse cpu topology during boot.
Currently, there are no topology defined for RISC-V.
Parse the cpu-map node from device tree and setup the
cpu topology.
CPU topology after applying the patch.
$cat /sys/devices/system/cpu/cpu2/topology/core_siblings_list
0-3
$cat /sys/devices/system/cpu/cpu3/topology/core_siblings_list
0-3
$cat /sys/devices/system/cpu/cpu3/topology/physical_package_id
0
$cat /sys/devices/system/cpu/cpu3/topology/core_id
3
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Diffstat (limited to 'arch/riscv/kernel')
| -rw-r--r-- | arch/riscv/kernel/smpboot.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index 7462a44304fe..18ae6da5115e 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -8,6 +8,7 @@ * Copyright (C) 2017 SiFive */ +#include <linux/arch_topology.h> #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> @@ -35,6 +36,7 @@ static DECLARE_COMPLETION(cpu_running); void __init smp_prepare_boot_cpu(void) { + init_cpu_topology(); } void __init smp_prepare_cpus(unsigned int max_cpus) @@ -138,6 +140,7 @@ asmlinkage void __init smp_callin(void) trap_init(); notify_cpu_starting(smp_processor_id()); + update_siblings_masks(smp_processor_id()); set_cpu_online(smp_processor_id(), 1); /* * Remote TLB flushes are ignored while the CPU is offline, so emit |