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/* 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);
static inline void hash__local_flush_tlb_mm(struct mm_struct *mm)
{
}
static inline void hash__flush_tlb_mm(struct mm_struct *mm)
{
}
static inline void hash__local_flush_all_mm(struct mm_struct *mm)
{
/*
* There's no Page Walk Cache for hash, so what is needed is
* the same as flush_tlb_mm(), which doesn't really make sense
* with hash. So the only thing we could do is flush the
* entire LPID! Punt for now, as it's not being used.
*/
WARN_ON_ONCE(1);
}
static inline void hash__flush_all_mm(struct mm_struct *mm)
{
/*
* There's no Page Walk Cache for hash, so what is needed is
* the same as flush_tlb_mm(), which doesn't really make sense
* with hash. So the only thing we could do is flush the
* entire LPID! Punt for now, as it's not being used.
*/
WARN_ON_ONCE(1);
}
static inline void hash__local_flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
}
static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
}
static inline void hash__flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
static inline void hash__flush_tlb_kernel_range(unsigned long start,
unsigned long end)
{
}
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 */
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