arch/powerpc/include/asm/tlb.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/tlb.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/tlb.h
Extension
.h
Size
2322 bytes
Lines
94
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_POWERPC_TLB_H
#define _ASM_POWERPC_TLB_H
#ifdef __KERNEL__

#ifndef __powerpc64__
#include <linux/pgtable.h>
#endif
#ifndef __powerpc64__
#include <asm/page.h>
#include <asm/mmu.h>
#endif

#include <linux/pagemap.h>

static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
					  unsigned long address);
#define __tlb_remove_tlb_entry	__tlb_remove_tlb_entry

#define tlb_flush tlb_flush
extern void tlb_flush(struct mmu_gather *tlb);
/*
 * book3s:
 * Hash does not use the linux page-tables, so we can avoid
 * the TLB invalidate for page-table freeing, Radix otoh does use the
 * page-tables and needs the TLBI.
 *
 * nohash:
 * We still do TLB invalidate in the __pte_free_tlb routine before we
 * add the page table pages to mmu gather table batch.
 */
#define tlb_needs_table_invalidate()	radix_enabled()

/* Get the generic bits... */
#include <asm-generic/tlb.h>

static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
					  unsigned long address)
{
#ifdef CONFIG_PPC_BOOK3S_32
	if (pte_val(*ptep) & _PAGE_HASHPTE)
		flush_hash_entry(tlb->mm, ptep, address);
#endif
}

#ifdef CONFIG_SMP
static inline int mm_is_core_local(struct mm_struct *mm)
{
	return cpumask_subset(mm_cpumask(mm),
			      topology_sibling_cpumask(smp_processor_id()));
}

#ifdef CONFIG_PPC_BOOK3S_64
static inline int mm_is_thread_local(struct mm_struct *mm)
{
	if (atomic_read(&mm->context.active_cpus) > 1)
		return false;
	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
}
#else /* CONFIG_PPC_BOOK3S_64 */
static inline int mm_is_thread_local(struct mm_struct *mm)
{
	return cpumask_equal(mm_cpumask(mm),
			      cpumask_of(smp_processor_id()));
}
#endif /* !CONFIG_PPC_BOOK3S_64 */

#else /* CONFIG_SMP */
static inline int mm_is_core_local(struct mm_struct *mm)
{
	return 1;
}

static inline int mm_is_thread_local(struct mm_struct *mm)
{
	return 1;
}
#endif

#define arch_supports_page_table_move arch_supports_page_table_move
static inline bool arch_supports_page_table_move(void)
{
	return radix_enabled();
}

#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_TLB_H */

Annotation

Implementation Notes