]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
arch/powerpc/mm: Nest MMU workaround for mprotect RW upgrade
authorAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Tue, 5 Mar 2019 23:46:33 +0000 (15:46 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 6 Mar 2019 05:07:18 +0000 (21:07 -0800)
commit5b323367ef2567dff0d3daff477186002754f0bd
tree48198967c06de704b46750342fdce8ec4677461d
parent04a8645304500be88b3345b65fef7efe58016166
arch/powerpc/mm: Nest MMU workaround for mprotect RW upgrade

NestMMU requires us to mark the pte invalid and flush the tlb when we do
a RW upgrade of pte.  We fixed a variant of this in the fault path in
bd5050e38aec ("powerpc/mm/radix: Change pte relax sequence to handle
nest MMU hang").

Do the same for mprotect upgrades.

Hugetlb is handled in the next patch.

Link: http://lkml.kernel.org/r/20190116085035.29729-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/powerpc/include/asm/book3s/64/pgtable.h
arch/powerpc/include/asm/book3s/64/radix.h
arch/powerpc/mm/pgtable-book3s64.c
arch/powerpc/mm/pgtable-radix.c