xref: /kernel/linux/linux-6.6/arch/powerpc/include/asm/book3s/64/tlbflush-hash.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
#define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H

/*
 * TLB flushing for 64-bit hash-MMU CPUs
 */

#include <linux/percpu.h>
#include <asm/page.h>

#define PPC64_TLB_BATCH_NR 192

struct ppc64_tlb_batch {
	int			active;
	unsigned long		index;
	struct mm_struct	*mm;
	real_pte_t		pte[PPC64_TLB_BATCH_NR];
	unsigned long		vpn[PPC64_TLB_BATCH_NR];
	unsigned int		psize;
	int			ssize;
};
DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);

extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);

#define __HAVE_ARCH_ENTER_LAZY_MMU_MODE

static inline void arch_enter_lazy_mmu_mode(void)
{
	struct ppc64_tlb_batch *batch;

	if (radix_enabled())
		return;
	/*
	 * apply_to_page_range can call us this preempt enabled when
	 * operating on kernel page tables.
	 */
	preempt_disable();
	batch = this_cpu_ptr(&ppc64_tlb_batch);
	batch->active = 1;
}

static inline void arch_leave_lazy_mmu_mode(void)
{
	struct ppc64_tlb_batch *batch;

	if (radix_enabled())
		return;
	batch = this_cpu_ptr(&ppc64_tlb_batch);

	if (batch->index)
		__flush_tlb_pending(batch);
	batch->active = 0;
	preempt_enable();
}

#define arch_flush_lazy_mmu_mode()      do {} while (0)

extern void hash__tlbiel_all(unsigned int action);

extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
			    int ssize, unsigned long flags);
extern void flush_hash_range(unsigned long number, int local);
extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
				pmd_t *pmdp, unsigned int psize, int ssize,
				unsigned long flags);

struct mmu_gather;
extern void hash__tlb_flush(struct mmu_gather *tlb);

#ifdef CONFIG_PPC_64S_HASH_MMU
/* Private function for use by PCI IO mapping code */
extern void __flush_hash_table_range(unsigned long start, unsigned long end);
void flush_hash_table_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr);
#else
static inline void __flush_hash_table_range(unsigned long start, unsigned long end) { }
#endif
#endif /*  _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */