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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9d3a04925d
Add support for per-processor bug checking - each processor function descriptor gains a function pointer for this check, which must not be an __init function. If non-NULL, this will be called whenever a CPU enters the kernel via which ever path (boot CPU, secondary CPU startup, CPU resuming, etc.) This allows processor specific bug checks to validate that workaround bits are properly enabled by firmware via all entry paths to the kernel. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Boot-tested-by: Tony Lindgren <tony@atomide.com> Reviewed-by: Tony Lindgren <tony@atomide.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com>
158 lines
3.6 KiB
C
158 lines
3.6 KiB
C
/*
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* arch/arm/include/asm/proc-fns.h
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*
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* Copyright (C) 1997-1999 Russell King
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* Copyright (C) 2000 Deep Blue Solutions 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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#ifndef __ASM_PROCFNS_H
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#define __ASM_PROCFNS_H
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#ifdef __KERNEL__
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#include <asm/glue-proc.h>
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#include <asm/page.h>
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#ifndef __ASSEMBLY__
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struct mm_struct;
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/*
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* Don't change this structure - ASM code relies on it.
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*/
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extern struct processor {
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/* MISC
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* get data abort address/flags
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*/
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void (*_data_abort)(unsigned long pc);
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/*
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* Retrieve prefetch fault address
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*/
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unsigned long (*_prefetch_abort)(unsigned long lr);
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/*
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* Set up any processor specifics
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*/
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void (*_proc_init)(void);
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/*
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* Check for processor bugs
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*/
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void (*check_bugs)(void);
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/*
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* Disable any processor specifics
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*/
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void (*_proc_fin)(void);
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/*
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* Special stuff for a reset
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*/
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void (*reset)(unsigned long addr, bool hvc) __attribute__((noreturn));
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/*
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* Idle the processor
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*/
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int (*_do_idle)(void);
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/*
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* Processor architecture specific
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*/
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/*
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* clean a virtual address range from the
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* D-cache without flushing the cache.
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*/
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void (*dcache_clean_area)(void *addr, int size);
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/*
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* Set the page table
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*/
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void (*switch_mm)(phys_addr_t pgd_phys, struct mm_struct *mm);
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/*
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* Set a possibly extended PTE. Non-extended PTEs should
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* ignore 'ext'.
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*/
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#ifdef CONFIG_ARM_LPAE
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void (*set_pte_ext)(pte_t *ptep, pte_t pte);
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#else
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void (*set_pte_ext)(pte_t *ptep, pte_t pte, unsigned int ext);
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#endif
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/* Suspend/resume */
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unsigned int suspend_size;
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void (*do_suspend)(void *);
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void (*do_resume)(void *);
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} processor;
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#ifndef MULTI_CPU
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extern void cpu_proc_init(void);
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extern void cpu_proc_fin(void);
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extern int cpu_do_idle(void);
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extern void cpu_dcache_clean_area(void *, int);
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extern void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm);
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#ifdef CONFIG_ARM_LPAE
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extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte);
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#else
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extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext);
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#endif
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extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn));
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/* These three are private to arch/arm/kernel/suspend.c */
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extern void cpu_do_suspend(void *);
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extern void cpu_do_resume(void *);
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#else
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#define cpu_proc_init processor._proc_init
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#define cpu_proc_fin processor._proc_fin
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#define cpu_reset processor.reset
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#define cpu_do_idle processor._do_idle
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#define cpu_dcache_clean_area processor.dcache_clean_area
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#define cpu_set_pte_ext processor.set_pte_ext
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#define cpu_do_switch_mm processor.switch_mm
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/* These three are private to arch/arm/kernel/suspend.c */
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#define cpu_do_suspend processor.do_suspend
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#define cpu_do_resume processor.do_resume
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#endif
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extern void cpu_resume(void);
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#include <asm/memory.h>
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#ifdef CONFIG_MMU
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#define cpu_switch_mm(pgd,mm) cpu_do_switch_mm(virt_to_phys(pgd),mm)
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#ifdef CONFIG_ARM_LPAE
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#define cpu_get_ttbr(nr) \
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({ \
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u64 ttbr; \
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__asm__("mrrc p15, " #nr ", %Q0, %R0, c2" \
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: "=r" (ttbr)); \
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ttbr; \
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})
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#define cpu_get_pgd() \
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({ \
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u64 pg = cpu_get_ttbr(0); \
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pg &= ~(PTRS_PER_PGD*sizeof(pgd_t)-1); \
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(pgd_t *)phys_to_virt(pg); \
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})
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#else
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#define cpu_get_pgd() \
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({ \
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unsigned long pg; \
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__asm__("mrc p15, 0, %0, c2, c0, 0" \
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: "=r" (pg) : : "cc"); \
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pg &= ~0x3fff; \
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(pgd_t *)phys_to_virt(pg); \
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})
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#endif
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#else /*!CONFIG_MMU */
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#define cpu_switch_mm(pgd,mm) { }
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* __ASM_PROCFNS_H */
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