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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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68289ae935
Today we have:
config PPC_BOOK3S_32
bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx"
[depends on PPC32 within a choice]
config PPC_BOOK3S
def_bool y
depends on PPC_BOOK3S_32 || PPC_BOOK3S_64
config PPC_STD_MMU
def_bool y
depends on PPC_BOOK3S
config PPC_STD_MMU_32
def_bool y
depends on PPC_STD_MMU && PPC32
PPC_STD_MMU_32 is therefore redundant with PPC_BOOK3S_32.
In order to make the code clearer, lets use preferably PPC_BOOK3S_32.
This will allow to remove CONFIG_PPC_STD_MMU_32 in a later patch.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/*
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* TLB shootdown specifics for powerpc
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*
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* Copyright (C) 2002 Anton Blanchard, IBM Corp.
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* Copyright (C) 2002 Paul Mackerras, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_TLB_H
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#define _ASM_POWERPC_TLB_H
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#ifdef __KERNEL__
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#ifndef __powerpc64__
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#include <asm/pgtable.h>
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#endif
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#include <asm/pgalloc.h>
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#ifndef __powerpc64__
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#include <asm/page.h>
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#include <asm/mmu.h>
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#endif
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#include <linux/pagemap.h>
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#define tlb_start_vma(tlb, vma) do { } while (0)
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#define tlb_end_vma(tlb, vma) do { } while (0)
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#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
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#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
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extern void tlb_flush(struct mmu_gather *tlb);
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/* Get the generic bits... */
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#include <asm-generic/tlb.h>
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extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
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unsigned long address);
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static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
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unsigned long address)
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{
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#ifdef CONFIG_PPC_BOOK3S_32
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if (pte_val(*ptep) & _PAGE_HASHPTE)
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flush_hash_entry(tlb->mm, ptep, address);
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#endif
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}
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static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
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unsigned int page_size)
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{
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if (!tlb->page_size)
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tlb->page_size = page_size;
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else if (tlb->page_size != page_size) {
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if (!tlb->fullmm)
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tlb_flush_mmu(tlb);
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/*
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* update the page size after flush for the new
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* mmu_gather.
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*/
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tlb->page_size = page_size;
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}
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}
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#ifdef CONFIG_SMP
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static inline int mm_is_core_local(struct mm_struct *mm)
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{
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return cpumask_subset(mm_cpumask(mm),
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topology_sibling_cpumask(smp_processor_id()));
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}
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#ifdef CONFIG_PPC_BOOK3S_64
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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if (atomic_read(&mm->context.active_cpus) > 1)
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return false;
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return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
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}
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static inline void mm_reset_thread_local(struct mm_struct *mm)
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{
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WARN_ON(atomic_read(&mm->context.copros) > 0);
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/*
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* It's possible for mm_access to take a reference on mm_users to
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* access the remote mm from another thread, but it's not allowed
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* to set mm_cpumask, so mm_users may be > 1 here.
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*/
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WARN_ON(current->mm != mm);
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atomic_set(&mm->context.active_cpus, 1);
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cpumask_clear(mm_cpumask(mm));
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cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
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}
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#else /* CONFIG_PPC_BOOK3S_64 */
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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return cpumask_equal(mm_cpumask(mm),
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cpumask_of(smp_processor_id()));
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}
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#endif /* !CONFIG_PPC_BOOK3S_64 */
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#else /* CONFIG_SMP */
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static inline int mm_is_core_local(struct mm_struct *mm)
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{
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return 1;
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}
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static inline int mm_is_thread_local(struct mm_struct *mm)
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{
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return 1;
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}
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#endif
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#endif /* __KERNEL__ */
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#endif /* __ASM_POWERPC_TLB_H */
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