Commit 03f11f03 authored by Atish Patra's avatar Atish Patra Committed by Paul Walmsley

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: default avatarAtish Patra <atish.patra@wdc.com>
Acked-by: default avatarSudeep Holla <sudeep.holla@arm.com>
Signed-off-by: default avatarPaul Walmsley <paul.walmsley@sifive.com>
parent ca74b316
...@@ -48,6 +48,7 @@ config RISCV ...@@ -48,6 +48,7 @@ config RISCV
select PCI_MSI if PCI select PCI_MSI if PCI
select RISCV_TIMER select RISCV_TIMER
select GENERIC_IRQ_MULTI_HANDLER select GENERIC_IRQ_MULTI_HANDLER
select GENERIC_ARCH_TOPOLOGY if SMP
select ARCH_HAS_PTE_SPECIAL select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_MMIOWB select ARCH_HAS_MMIOWB
select HAVE_EBPF_JIT if 64BIT select HAVE_EBPF_JIT if 64BIT
......
...@@ -8,6 +8,7 @@ ...@@ -8,6 +8,7 @@
* Copyright (C) 2017 SiFive * Copyright (C) 2017 SiFive
*/ */
#include <linux/arch_topology.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/kernel.h> #include <linux/kernel.h>
...@@ -35,6 +36,7 @@ static DECLARE_COMPLETION(cpu_running); ...@@ -35,6 +36,7 @@ static DECLARE_COMPLETION(cpu_running);
void __init smp_prepare_boot_cpu(void) void __init smp_prepare_boot_cpu(void)
{ {
init_cpu_topology();
} }
void __init smp_prepare_cpus(unsigned int max_cpus) void __init smp_prepare_cpus(unsigned int max_cpus)
...@@ -138,6 +140,7 @@ asmlinkage void __init smp_callin(void) ...@@ -138,6 +140,7 @@ asmlinkage void __init smp_callin(void)
trap_init(); trap_init();
notify_cpu_starting(smp_processor_id()); notify_cpu_starting(smp_processor_id());
update_siblings_masks(smp_processor_id());
set_cpu_online(smp_processor_id(), 1); set_cpu_online(smp_processor_id(), 1);
/* /*
* Remote TLB flushes are ignored while the CPU is offline, so emit * Remote TLB flushes are ignored while the CPU is offline, so emit
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment