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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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313a05a15a
A per-CPU batch struct is activated when entering lazy MMU mode; its lifetime is the same as the lazy MMU section (it is deactivated when leaving the mode). Preemption is disabled in that interval to ensure that the per-CPU reference remains valid. The generic lazy_mmu layer now tracks whether a task is in lazy MMU mode. We can therefore use the generic helper is_lazy_mmu_mode_active() to tell whether a batch struct is active instead of tracking it explicitly. Link: https://lkml.kernel.org/r/20251215150323.2218608-12-kevin.brodsky@arm.com Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com> Tested-by: Venkat Rao Bagalkote <venkat88@linux.ibm.com> Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Borislav Betkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Hildenbrand (Red Hat) <david@kernel.org> Cc: David S. Miller <davem@davemloft.net> Cc: David Woodhouse <dwmw2@infradead.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Juegren Gross <jgross@suse.com> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Gleinxer <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
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#define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
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/*
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* TLB flushing for 64-bit hash-MMU CPUs
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*/
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#include <linux/percpu.h>
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#include <asm/page.h>
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#define PPC64_TLB_BATCH_NR 192
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struct ppc64_tlb_batch {
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unsigned long index;
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struct mm_struct *mm;
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real_pte_t pte[PPC64_TLB_BATCH_NR];
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unsigned long vpn[PPC64_TLB_BATCH_NR];
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unsigned int psize;
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int ssize;
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};
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DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
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extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
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static inline void arch_enter_lazy_mmu_mode(void)
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{
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if (radix_enabled())
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return;
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/*
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* apply_to_page_range can call us this preempt enabled when
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* operating on kernel page tables.
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*/
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preempt_disable();
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}
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static inline void arch_flush_lazy_mmu_mode(void)
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{
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struct ppc64_tlb_batch *batch;
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if (radix_enabled())
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return;
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batch = this_cpu_ptr(&ppc64_tlb_batch);
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if (batch->index)
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__flush_tlb_pending(batch);
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}
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static inline void arch_leave_lazy_mmu_mode(void)
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{
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if (radix_enabled())
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return;
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arch_flush_lazy_mmu_mode();
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preempt_enable();
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}
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extern void hash__tlbiel_all(unsigned int action);
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extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
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int ssize, unsigned long flags);
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extern void flush_hash_range(unsigned long number, int local);
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extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
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pmd_t *pmdp, unsigned int psize, int ssize,
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unsigned long flags);
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struct mmu_gather;
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extern void hash__tlb_flush(struct mmu_gather *tlb);
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#ifdef CONFIG_PPC_64S_HASH_MMU
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/* Private function for use by PCI IO mapping code */
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extern void __flush_hash_table_range(unsigned long start, unsigned long end);
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void flush_hash_table_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr);
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#else
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static inline void __flush_hash_table_range(unsigned long start, unsigned long end) { }
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#endif
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#endif /* _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */
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