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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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80639d4a79
We don't currently check a number of registers exposed to AArch32 guests
(MVFR{0,1,2}_EL1 and ID_DFR0_EL1), despite the fact these describe
AArch32 feature support exposed to userspace and KVM guests similarly to
AArch64 registers which we do check. We do not expect these registers to
vary across a set of CPUs.
This patch adds said registers to the cpuinfo framework and sanity
checks. No sanity check failures have been observed on a current ARMv8
big.LITTLE platform (Juno).
Cc: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* Copyright (C) 2014 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ASM_CPU_H
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#define __ASM_CPU_H
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#include <linux/cpu.h>
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#include <linux/init.h>
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#include <linux/percpu.h>
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/*
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* Records attributes of an individual CPU.
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*/
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struct cpuinfo_arm64 {
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struct cpu cpu;
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u32 reg_ctr;
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u32 reg_cntfrq;
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u32 reg_dczid;
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u32 reg_midr;
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u64 reg_id_aa64dfr0;
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u64 reg_id_aa64dfr1;
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u64 reg_id_aa64isar0;
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u64 reg_id_aa64isar1;
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u64 reg_id_aa64mmfr0;
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u64 reg_id_aa64mmfr1;
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u64 reg_id_aa64pfr0;
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u64 reg_id_aa64pfr1;
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u32 reg_id_dfr0;
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u32 reg_id_isar0;
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u32 reg_id_isar1;
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u32 reg_id_isar2;
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u32 reg_id_isar3;
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u32 reg_id_isar4;
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u32 reg_id_isar5;
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u32 reg_id_mmfr0;
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u32 reg_id_mmfr1;
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u32 reg_id_mmfr2;
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u32 reg_id_mmfr3;
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u32 reg_id_pfr0;
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u32 reg_id_pfr1;
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u32 reg_mvfr0;
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u32 reg_mvfr1;
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u32 reg_mvfr2;
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};
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DECLARE_PER_CPU(struct cpuinfo_arm64, cpu_data);
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void cpuinfo_store_cpu(void);
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void __init cpuinfo_store_boot_cpu(void);
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#endif /* __ASM_CPU_H */
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