Commit 442bf488 authored by Kevin Brodsky's avatar Kevin Brodsky Committed by Andrew Morton
Browse files

sparc/mm: implement arch_flush_lazy_mmu_mode() 

Upcoming changes to the lazy_mmu API will cause arch_flush_lazy_mmu_mode()
to be called when leaving a nested lazy_mmu section.

Move the relevant logic from arch_leave_lazy_mmu_mode() to
arch_flush_lazy_mmu_mode() and have the former call the latter.

Note: the additional this_cpu_ptr() call on the arch_leave_lazy_mmu_mode()
path will be removed in a subsequent patch.

Link: https://lkml.kernel.org/r/20251215150323.2218608-5-kevin.brodsky@arm.com


Signed-off-by: default avatarKevin Brodsky <kevin.brodsky@arm.com>
Acked-by: default avatarDavid Hildenbrand <david@redhat.com>
Reviewed-by: default avatarYeoreum Yun <yeoreum.yun@arm.com>
Acked-by: default avatarAndreas Larsson <andreas@gaisler.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.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: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Venkat Rao Bagalkote <venkat88@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c3f0778f

arch/sparc/include/asm/tlbflush_64.h

+1 −1
Original line number Diff line number Diff line
@@ -43,8 +43,8 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end); 


void flush_tlb_pending(void);

void arch_enter_lazy_mmu_mode(void);

void arch_flush_lazy_mmu_mode(void);

void arch_leave_lazy_mmu_mode(void);

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



/* Local cpu only.  */

void __flush_tlb_all(void);

arch/sparc/mm/tlb.c

+8 −1
Original line number Diff line number Diff line
@@ -59,12 +59,19 @@ void arch_enter_lazy_mmu_mode(void) 
	tb->active = 1;

}



void arch_leave_lazy_mmu_mode(void)

void arch_flush_lazy_mmu_mode(void)

{

	struct tlb_batch *tb = this_cpu_ptr(&tlb_batch);



	if (tb->tlb_nr)

		flush_tlb_pending();

}



void arch_leave_lazy_mmu_mode(void)

{

	struct tlb_batch *tb = this_cpu_ptr(&tlb_batch);



	arch_flush_lazy_mmu_mode();

	tb->active = 0;

	preempt_enable();

}