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| author |   Anup Patel <apatel@ventanamicro.com> | 2022-04-20 16:54:08 +0530 |
|---|---|---|
| committer |   Palmer Dabbelt <palmer@rivosinc.com> | 2022-10-04 13:16:44 -0700 |
| commit | e623715f3d67ad10985b2c10cf7edd9ad85db372 (patch) | |
| tree | 2b392ef105748c2d5736e1c22817a49801494ef7 | |
| parent | cpuidle: riscv-sbi: Fix CPU_PM_CPU_IDLE_ENTER_xyz() macro usage (diff) | |
| download | linux-dev-e623715f3d67ad10985b2c10cf7edd9ad85db372.tar.xz linux-dev-e623715f3d67ad10985b2c10cf7edd9ad85db372.zip | |
RISC-V: Increase range and default value of NR_CPUS
Currently, the range and default value of NR_CPUS is too restrictive
for high-end RISC-V systems with large number of HARTs. The latest
QEMU virt machine supports upto 512 CPUs so the current NR_CPUS is
restrictive for QEMU as well. Other major architectures (such as
ARM64, x86_64, MIPS, etc) have a much higher range and default
value of NR_CPUS.
This patch increases NR_CPUS range to 2-512 and default value to
XLEN (i.e. 32 for RV32 and 64 for RV64).
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Link: https://lore.kernel.org/r/20220420112408.155561-1-apatel@ventanamicro.com/
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
| -rw-r--r-- | arch/riscv/Kconfig | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index d557cc50295d..f06ce10a589b 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -309,10 +309,13 @@ config SMP If you don't know what to do here, say N. config NR_CPUS - int "Maximum number of CPUs (2-32)" - range 2 32 + int "Maximum number of CPUs (2-512)" depends on SMP - default "8" + range 2 512 if !SBI_V01 + range 2 32 if SBI_V01 && 32BIT + range 2 64 if SBI_V01 && 64BIT + default "32" if 32BIT + default "64" if 64BIT config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" |