Alistair Popple d0cf9b561c powerpc/powernv/npu: Do a PID GPU TLB flush when invalidating a large address range ... The NPU has a limited number of address translation shootdown (ATSD) registers and the GPU has limited bandwidth to process ATSDs. This can result in contention of ATSD registers leading to soft lockups on some threads, particularly when invalidating a large address range in pnv_npu2_mn_invalidate_range(). At some threshold it becomes more efficient to flush the entire GPU TLB for the given MM context (PID) than individually flushing each address in the range. This patch will result in ranges greater than 2MB being converted from 32+ ATSDs into a single ATSD which will flush the TLB for the given PID on each GPU. Fixes: 1ab66d1fba ("powerpc/powernv: Introduce address translation services for Nvlink2") Cc: stable@vger.kernel.org # v4.12+ Signed-off-by: Alistair Popple <alistair@popple.id.au> Acked-by: Balbir Singh <bsingharora@gmail.com> Tested-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-04-24 09:46:57 +10:00
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boot	powerpc updates for 4.17	2018-04-07 12:08:19 -07:00
configs	scsi: remove the fdomain and fdomain_cs drivers	2018-03-19 22:54:47 -04:00
crypto	crypto: hash - annotate algorithms taking optional key	2018-01-12 23:03:35 +11:00
include	powerpc/powernv/npu: Prevent overwriting of pnv_npu2_init_contex() callback parameters	2018-04-24 09:46:57 +10:00
kernel	powerpc/kvm: Fix lockups when running KVM guests on Power8	2018-04-19 16:22:20 +10:00
kvm	powerpc fixes for 4.17 #2	2018-04-15 11:57:12 -07:00
lib	powerpc/lib: Fix off-by-one in alternate feature patching	2018-04-17 00:37:48 +10:00
math-emu	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mm	powerpc/mm: Flush cache on memory hot(un)plug	2018-04-24 09:46:56 +10:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2018-03-05 11:29:24 -08:00
oprofile	powerpc: Use sizeof(*foo) rather than sizeof(struct foo)	2018-03-20 16:47:53 +11:00
perf	powerpc updates for 4.17	2018-04-07 12:08:19 -07:00
platforms	powerpc/powernv/npu: Do a PID GPU TLB flush when invalidating a large address range	2018-04-24 09:46:57 +10:00
purgatory	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
sysdev	powerpc/xive: Fix trying to "push" an already active pool VP	2018-04-19 00:49:45 +10:00
tools	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
xmon	Merge branch 'topic/paca' into next	2018-03-31 09:09:36 +11:00
Kconfig	kexec_file: make use of purgatory optional	2018-04-13 17:10:27 -07:00
Kconfig.debug	powerpc: Add new kconfig CONFIG_PPC_IRQ_SOFT_MASK_DEBUG	2018-01-19 22:37:03 +11:00
Makefile	powerpc/64s: Add POWER9 CPU type selection	2018-04-01 22:15:32 +10:00
Makefile.postlink	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00