| Message ID | 1543534100-3654-5-git-send-email-atish.patra@wdc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Unify CPU topology across ARM64 & RISC-V | expand |
On Thu, Nov 29, 2018 at 03:28:20PM -0800, Atish Patra wrote: > 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 > That looks simple. Good reuse and thanks for unifying. FWIW, Acked-by:Sudeep Holla <sudeep.holla@arm.com> -- Regards, Sudeep
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 55da93f4..b0b1fe1a 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -42,6 +42,7 @@ config RISCV select THREAD_INFO_IN_TASK select RISCV_TIMER select GENERIC_IRQ_MULTI_HANDLER + select GENERIC_ARCH_TOPOLOGY if SMP select ARCH_HAS_PTE_SPECIAL config MMU diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c index 18cda0e8..5f435af7 100644 --- a/arch/riscv/kernel/smpboot.c +++ b/arch/riscv/kernel/smpboot.c @@ -16,6 +16,7 @@ * GNU General Public License for more details. */ +#include <linux/arch_topology.h> #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> @@ -42,6 +43,7 @@ void *__cpu_up_task_pointer[NR_CPUS]; void __init smp_prepare_boot_cpu(void) { + init_cpu_topology(); } void __init smp_prepare_cpus(unsigned int max_cpus) @@ -115,6 +117,7 @@ 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
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> --- arch/riscv/Kconfig | 1 + arch/riscv/kernel/smpboot.c | 3 +++ 2 files changed, 4 insertions(+)