Peter Zijlstra 0ed1325967 mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush ... Architectures for which we have hardware walkers of Linux page table should flush TLB on mmu gather batch allocation failures and batch flush. Some architectures like POWER supports multiple translation modes (hash and radix) and in the case of POWER only radix translation mode needs the above TLBI. This is because for hash translation mode kernel wants to avoid this extra flush since there are no hardware walkers of linux page table. With radix translation, the hardware also walks linux page table and with that, kernel needs to make sure to TLB invalidate page walk cache before page table pages are freed. More details in commit d86564a2f0 ("mm/tlb, x86/mm: Support invalidating TLB caches for RCU_TABLE_FREE") The changes to sparc are to make sure we keep the old behavior since we are now removing HAVE_RCU_TABLE_NO_INVALIDATE. The default value for tlb_needs_table_invalidate is to always force an invalidate and sparc can avoid the table invalidate. Hence we define tlb_needs_table_invalidate to false for sparc architecture. Link: http://lkml.kernel.org/r/20200116064531.483522-3-aneesh.kumar@linux.ibm.com Fixes: a46cc7a90f ("powerpc/mm/radix: Improve TLB/PWC flushes") Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> [powerpc] Cc: <stable@vger.kernel.org> [4.14+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-02-04 03:05:26 +00:00
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boot	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61	2019-05-24 17:36:45 +02:00
configs	sparc: configs: Remove useless UEVENT_HELPER_PATH	2019-06-13 14:12:19 -07:00
crypto	crypto: remove CRYPTO_TFM_RES_BAD_KEY_LEN	2020-01-09 11:30:53 +08:00
include	mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush	2020-02-04 03:05:26 +00:00
kernel	sparc64: fix adjtimex regression	2020-02-02 11:54:41 +01:00
lib	sparc64: Add missing newline at end of file	2019-07-09 14:53:57 -07:00
math-emu	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
mm	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2020-01-30 07:36:43 -08:00
net	treewide: Use sizeof_field() macro	2019-12-09 10:36:44 -08:00
oprofile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
power	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
prom
vdso	y2038: syscall implementation cleanups	2019-12-01 14:00:59 -08:00
Kbuild	treewide: Add SPDX license identifier - Kbuild	2019-05-30 11:32:33 -07:00
Kconfig	mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush	2020-02-04 03:05:26 +00:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Makefile	sparc: generate uapi header and system call table files	2018-11-18 18:52:22 -08:00