Unverified Commit c4b52d8b authored by Song Shuai's avatar Song Shuai Committed by Palmer Dabbelt
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riscv: export cpu/freq invariant to scheduler 



RISC-V now manages CPU topology using arch_topology which provides
CPU capacity and frequency related interfaces to access the cpu/freq
invariant in possible heterogeneous or DVFS-enabled platforms.

Here adds topology.h file to export the arch_topology interfaces for
replacing the scheduler's constant-based cpu/freq invariant accounting.

Signed-off-by: default avatarSong Shuai <suagrfillet@gmail.com>
Reviewed-by: default avatarAndrew Jones <ajones@ventanamicro.com>
Reviewed-by: default avatarLey Foon Tan <lftan@kernel.org>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230323123924.3032174-1-suagrfillet@gmail.com


[Palmer: Fix the whitespace issues.]
Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent eb04e72b

arch/riscv/include/asm/topology.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_RISCV_TOPOLOGY_H

#define _ASM_RISCV_TOPOLOGY_H



#include <linux/arch_topology.h>



/* Replace task scheduler's default frequency-invariant accounting */

#define arch_scale_freq_tick	topology_scale_freq_tick

#define arch_set_freq_scale	topology_set_freq_scale

#define arch_scale_freq_capacity	topology_get_freq_scale

#define arch_scale_freq_invariant	topology_scale_freq_invariant



/* Replace task scheduler's default cpu-invariant accounting */

#define arch_scale_cpu_capacity	topology_get_cpu_scale



/* Enable topology flag updates */

#define arch_update_cpu_topology	topology_update_cpu_topology



#include <asm-generic/topology.h>

#endif /* _ASM_RISCV_TOPOLOGY_H */