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linux/arch/riscv/include/asm/topology.h

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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: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Ley Foon Tan <lftan@kernel.org> Reviewed-by: Conor 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: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 20:39:24 +08:00
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_RISCV_TOPOLOGY_H
#define _ASM_RISCV_TOPOLOGY_H
#include <linux/arch_topology.h>
arch, mm: move definition of node_data to generic code Every architecture that supports NUMA defines node_data in the same way: struct pglist_data *node_data[MAX_NUMNODES]; No reason to keep multiple copies of this definition and its forward declarations, especially when such forward declaration is the only thing in include/asm/mmzone.h for many architectures. Add definition and declaration of node_data to generic code and drop architecture-specific versions. Link: https://lkml.kernel.org/r/20240807064110.1003856-8-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Tested-by: Zi Yan <ziy@nvidia.com> # for x86_64 and arm64 Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> [arm64 + CXL via QEMU] Acked-by: Dan Williams <dan.j.williams@intel.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiaxun Yang <jiaxun.yang@flygoat.com> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Rob Herring (Arm) <robh@kernel.org> Cc: Samuel Holland <samuel.holland@sifive.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-08-07 09:40:51 +03:00
#ifdef CONFIG_NUMA
#include <asm/numa.h>
#endif
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: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Ley Foon Tan <lftan@kernel.org> Reviewed-by: Conor 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: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 20:39:24 +08:00
/* Replace task scheduler's default frequency-invariant accounting */
Merge patch series "Introduce 64b relocatable kernel" Alexandre Ghiti <alexghiti@rivosinc.com> says: After multiple attempts, this patchset is now based on the fact that the 64b kernel mapping was moved outside the linear mapping. The first patch allows to build relocatable kernels but is not selected by default. That patch is a requirement for KASLR. The second and third patches take advantage of an already existing powerpc script that checks relocations at compile-time, and uses it for riscv. * b4-shazam-merge: riscv: Use --emit-relocs in order to move .rela.dyn in init riscv: Check relocations at compile time powerpc: Move script to check relocations at compile time in scripts/ riscv: Introduce CONFIG_RELOCATABLE riscv: Move .rela.dyn outside of init to avoid empty relocations riscv: Prepare EFI header for relocatable kernels Link: https://lore.kernel.org/r/20230329045329.64565-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-04-19 07:47:45 -07:00
#define arch_scale_freq_tick topology_scale_freq_tick
#define arch_set_freq_scale topology_set_freq_scale
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: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Ley Foon Tan <lftan@kernel.org> Reviewed-by: Conor 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: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 20:39:24 +08:00
#define arch_scale_freq_capacity topology_get_freq_scale
#define arch_scale_freq_invariant topology_scale_freq_invariant
sched/topology: Add a new arch_scale_freq_ref() method Create a new method to get a unique and fixed max frequency. Currently cpuinfo.max_freq or the highest (or last) state of performance domain are used as the max frequency when computing the frequency for a level of utilization, but: - cpuinfo_max_freq can change at runtime. boost is one example of such change. - cpuinfo.max_freq and last item of the PD can be different leading to different results between cpufreq and energy model. We need to save the reference frequency that has been used when computing the CPUs capacity and use this fixed and coherent value to convert between frequency and CPU's capacity. In fact, we already save the frequency that has been used when computing the capacity of each CPU. We extend the precision to save kHz instead of MHz currently and we modify the type to be aligned with other variables used when converting frequency to capacity and the other way. [ mingo: Minor edits. ] Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Lukasz Luba <lukasz.luba@arm.com> Reviewed-by: Lukasz Luba <lukasz.luba@arm.com> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Link: https://lore.kernel.org/r/20231211104855.558096-2-vincent.guittot@linaro.org
2023-12-11 11:48:49 +01:00
#define arch_scale_freq_ref topology_get_freq_ref
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: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Ley Foon Tan <lftan@kernel.org> Reviewed-by: Conor 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: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 20:39:24 +08:00
/* 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>
Merge patch series "Introduce 64b relocatable kernel" Alexandre Ghiti <alexghiti@rivosinc.com> says: After multiple attempts, this patchset is now based on the fact that the 64b kernel mapping was moved outside the linear mapping. The first patch allows to build relocatable kernels but is not selected by default. That patch is a requirement for KASLR. The second and third patches take advantage of an already existing powerpc script that checks relocations at compile-time, and uses it for riscv. * b4-shazam-merge: riscv: Use --emit-relocs in order to move .rela.dyn in init riscv: Check relocations at compile time powerpc: Move script to check relocations at compile time in scripts/ riscv: Introduce CONFIG_RELOCATABLE riscv: Move .rela.dyn outside of init to avoid empty relocations riscv: Prepare EFI header for relocatable kernels Link: https://lore.kernel.org/r/20230329045329.64565-1-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2023-04-19 07:47:45 -07:00
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: Song Shuai <suagrfillet@gmail.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Ley Foon Tan <lftan@kernel.org> Reviewed-by: Conor 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: Palmer Dabbelt <palmer@rivosinc.com>
2023-03-23 20:39:24 +08:00
#endif /* _ASM_RISCV_TOPOLOGY_H */
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