mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2025-01-14 06:16:11 +07:00
3c739b5710
This patch adds an infrastructure to keep track of the CPU feature registers on the system. For each register, the infrastructure keeps track of the system wide safe value of the feature bits. Also, tracks the which fields of a register should be matched strictly across all the CPUs on the system for the SANITY check infrastructure. The feature bits are classified into following 3 types depending on the implication of the possible values. This information is used to decide the safe value for a feature. LOWER_SAFE - The smaller value is safer HIGHER_SAFE - The bigger value is safer EXACT - We can't decide between the two, so a predefined safe_value is used. This infrastructure will be later used to make better decisions for: - Kernel features (e.g, KVM, Debug) - SANITY Check - CPU capability - ELF HWCAP - Exposing CPU Feature register to userspace. Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com> Tested-by: Dave Martin <Dave.Martin@arm.com> [catalin.marinas@arm.com: whitespace fix] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/*
|
|
* Copyright (C) 2014 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#ifndef __ASM_CPU_H
|
|
#define __ASM_CPU_H
|
|
|
|
#include <linux/cpu.h>
|
|
#include <linux/init.h>
|
|
#include <linux/percpu.h>
|
|
|
|
/*
|
|
* Records attributes of an individual CPU.
|
|
*/
|
|
struct cpuinfo_arm64 {
|
|
struct cpu cpu;
|
|
u32 reg_ctr;
|
|
u32 reg_cntfrq;
|
|
u32 reg_dczid;
|
|
u32 reg_midr;
|
|
|
|
u64 reg_id_aa64dfr0;
|
|
u64 reg_id_aa64dfr1;
|
|
u64 reg_id_aa64isar0;
|
|
u64 reg_id_aa64isar1;
|
|
u64 reg_id_aa64mmfr0;
|
|
u64 reg_id_aa64mmfr1;
|
|
u64 reg_id_aa64pfr0;
|
|
u64 reg_id_aa64pfr1;
|
|
|
|
u32 reg_id_dfr0;
|
|
u32 reg_id_isar0;
|
|
u32 reg_id_isar1;
|
|
u32 reg_id_isar2;
|
|
u32 reg_id_isar3;
|
|
u32 reg_id_isar4;
|
|
u32 reg_id_isar5;
|
|
u32 reg_id_mmfr0;
|
|
u32 reg_id_mmfr1;
|
|
u32 reg_id_mmfr2;
|
|
u32 reg_id_mmfr3;
|
|
u32 reg_id_pfr0;
|
|
u32 reg_id_pfr1;
|
|
|
|
u32 reg_mvfr0;
|
|
u32 reg_mvfr1;
|
|
u32 reg_mvfr2;
|
|
};
|
|
|
|
DECLARE_PER_CPU(struct cpuinfo_arm64, cpu_data);
|
|
|
|
void cpuinfo_store_cpu(void);
|
|
void __init cpuinfo_store_boot_cpu(void);
|
|
|
|
void __init init_cpu_features(struct cpuinfo_arm64 *info);
|
|
void update_cpu_features(struct cpuinfo_arm64 *info);
|
|
|
|
#endif /* __ASM_CPU_H */
|