[mirror_ubuntu-jammy-kernel.git] / arch / powerpc / include / asm / tlb.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *	TLB shootdown specifics for powerpc
 *
 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
 */
#ifndef _ASM_POWERPC_TLB_H
#define _ASM_POWERPC_TLB_H
#ifdef __KERNEL__

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

#include <linux/pagemap.h>

#define tlb_start_vma(tlb, vma)	do { } while (0)
#define tlb_end_vma(tlb, vma)	do { } while (0)
#define __tlb_remove_tlb_entry	__tlb_remove_tlb_entry

#define tlb_flush tlb_flush
extern void tlb_flush(struct mmu_gather *tlb);

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

extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
			     unsigned long address);

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));
}
static inline void mm_reset_thread_local(struct mm_struct *mm)
{
	WARN_ON(atomic_read(&mm->context.copros) > 0);
	/*
	 * It's possible for mm_access to take a reference on mm_users to
	 * access the remote mm from another thread, but it's not allowed
	 * to set mm_cpumask, so mm_users may be > 1 here.
	 */
	WARN_ON(current->mm != mm);
	atomic_set(&mm->context.active_cpus, 1);
	cpumask_clear(mm_cpumask(mm));
	cpumask_set_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

#endif /* __KERNEL__ */
#endif /* __ASM_POWERPC_TLB_H */
Commit	Line	Data
2874c5fd	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
1da177e4	2	/*
9a0f78f6	3	* TLB shootdown specifics for powerpc
1da177e4	4	*
9a0f78f6	5	* Copyright (C) 2002 Anton Blanchard, IBM Corp.
1da177e4	6	* Copyright (C) 2002 Paul Mackerras, IBM Corp.
1da177e4	7	*/
9a0f78f6 SR	8	#ifndef _ASM_POWERPC_TLB_H
9a0f78f6 SR	9	#define _ASM_POWERPC_TLB_H
88ced031	10	#ifdef __KERNEL__
1da177e4	11
9a0f78f6	12	#ifndef __powerpc64__
1da177e4	13	#include <asm/pgtable.h>
9a0f78f6	14	#endif
1da177e4	15	#include <asm/pgalloc.h>
9a0f78f6	16	#ifndef __powerpc64__
1da177e4 LT	17	#include <asm/page.h>
1da177e4 LT	18	#include <asm/mmu.h>
9a0f78f6	19	#endif
1da177e4	20
d4243c17 MD	21	#include <linux/pagemap.h>
d4243c17 MD	22
9a0f78f6 SR	23	#define tlb_start_vma(tlb, vma) do { } while (0)
9a0f78f6 SR	24	#define tlb_end_vma(tlb, vma) do { } while (0)
fb7332a9	25	#define __tlb_remove_tlb_entry __tlb_remove_tlb_entry
9a0f78f6	26
5f307be1	27	#define tlb_flush tlb_flush
1da177e4 LT	28	extern void tlb_flush(struct mmu_gather *tlb);
	29
	30	/* Get the generic bits... */
	31	#include <asm-generic/tlb.h>
	32
1da177e4 LT	33	extern void flush_hash_entry(struct mm_struct mm, pte_t ptep,
	34	unsigned long address);
	35
	36	static inline void __tlb_remove_tlb_entry(struct mmu_gather tlb, pte_t ptep,
c7cc58a1	37	unsigned long address)
1da177e4	38	{
68289ae9	39	#ifdef CONFIG_PPC_BOOK3S_32
1da177e4 LT	40	if (pte_val(*ptep) & _PAGE_HASHPTE)
1da177e4 LT	41	flush_hash_entry(tlb->mm, ptep, address);
c7cc58a1	42	#endif
1da177e4 LT	43	}
1da177e4 LT	44
9d4dab11 AK	45	#ifdef CONFIG_SMP
	46	static inline int mm_is_core_local(struct mm_struct *mm)
	47	{
	48	return cpumask_subset(mm_cpumask(mm),
	49	topology_sibling_cpumask(smp_processor_id()));
	50	}
bd77c449	51
a619e59c BH	52	#ifdef CONFIG_PPC_BOOK3S_64
	53	static inline int mm_is_thread_local(struct mm_struct *mm)
	54	{
	55	if (atomic_read(&mm->context.active_cpus) > 1)
	56	return false;
	57	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
	58	}
0cef77c7 NP	59	static inline void mm_reset_thread_local(struct mm_struct *mm)
	60	{
	61	WARN_ON(atomic_read(&mm->context.copros) > 0);
	62	/*
	63	* It's possible for mm_access to take a reference on mm_users to
	64	* access the remote mm from another thread, but it's not allowed
	65	* to set mm_cpumask, so mm_users may be > 1 here.
	66	*/
	67	WARN_ON(current->mm != mm);
	68	atomic_set(&mm->context.active_cpus, 1);
	69	cpumask_clear(mm_cpumask(mm));
	70	cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm));
	71	}
a619e59c	72	#else /* CONFIG_PPC_BOOK3S_64 */
bd77c449 AK	73	static inline int mm_is_thread_local(struct mm_struct *mm)
	74	{
	75	return cpumask_equal(mm_cpumask(mm),
	76	cpumask_of(smp_processor_id()));
	77	}
a619e59c	78	#endif /* !CONFIG_PPC_BOOK3S_64 */
bd77c449	79
a619e59c	80	#else /* CONFIG_SMP */
9d4dab11 AK	81	static inline int mm_is_core_local(struct mm_struct *mm)
	82	{
	83	return 1;
	84	}
bd77c449 AK	85
	86	static inline int mm_is_thread_local(struct mm_struct *mm)
	87	{
	88	return 1;
	89	}
9d4dab11 AK	90	#endif
9d4dab11 AK	91
88ced031	92	#endif /* __KERNEL__ */
9a0f78f6	93	#endif /* __ASM_POWERPC_TLB_H */