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d0cf9b561c
linux_dsm_epyc7002/arch/powerpc/platforms/powernv
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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
..
copy-paste.h powerpc/powernv/vas: Define copy/paste interfaces 2017-08-31 14:26:38 +10:00
eeh-powernv.c powerpc/eeh: Add eeh_state_active() helper 2018-03-27 23:45:19 +11:00
idle.c powerpc/powernv: Fix SMT4 forcing idle code 2018-04-03 22:14:27 +10:00
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile powerpc/powernv/vas: Remove a stray line in Makefile 2018-03-13 15:10:14 +11:00
memtrace.c powerpc/powernv/memtrace: Let the arch hotunplug code flush cache 2018-04-24 09:46:56 +10:00
npu-dma.c powerpc/powernv/npu: Do a PID GPU TLB flush when invalidating a large address range 2018-04-24 09:46:57 +10:00
ocxl.c ocxl: Add AFU interrupt support 2018-01-24 11:42:58 +11:00
opal-async.c powerpc/opal: Add opal_async_wait_response_interruptible() to opal-async 2017-11-06 20:39:28 +11:00
opal-dump.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
opal-elog.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
opal-flash.c powerpc/powernv: Always stop secondaries before reboot/shutdown 2018-04-03 22:59:57 +10:00
opal-hmi.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-imc.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-irqchip.c powerpc/powernv: Make opal_event_shutdown() callable from IRQ context 2017-10-06 20:03:08 +11:00
opal-kmsg.c powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages 2016-01-13 12:35:17 +11:00
opal-lpc.c powerpc: Create asm/debugfs.h and move powerpc_debugfs_root there 2017-04-11 07:46:03 +10:00
opal-memory-errors.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-msglog.c locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE() 2017-10-25 11:01:08 +02:00
opal-nvram.c powerpc/powernv: Fix OPAL NVRAM driver OPAL_BUSY loops 2018-04-11 11:58:43 +10:00
opal-power.c powerpc/powernv: Add poweroff (EPOW, DPO) events support for PowerNV platform 2015-07-16 13:34:36 +10:00
opal-powercap.c powerpc/powernv: Add support for powercap framework 2017-08-10 22:39:53 +10:00
opal-prd.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
opal-psr.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-rtc.c powerpc/powernv: Only delay opal_rtc_read() retry when necessary 2015-12-27 19:12:40 +11:00
opal-sensor-groups.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal-sensor.c powernv/opal-sensor: remove not needed lock 2017-11-06 20:33:56 +11:00
opal-sysparam.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
opal-tracepoints.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
opal-wrappers.S powerpc/powernv: Enable tunneled operations 2018-03-13 15:50:30 +11:00
opal-xscom.c powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
opal.c libnvdimm for 4.17 2018-04-10 10:25:57 -07:00
pci-cxl.c powerpc/powernv: Enable tunneled operations 2018-03-13 15:50:30 +11:00
pci-ioda.c powerpc/powernv/npu: Do not try invalidating 32bit table when 64bit table is enabled 2018-03-27 23:44:57 +11:00
pci.c powerpc/powernv: Enable tunneled operations 2018-03-13 15:50:30 +11:00
pci.h powerpc/powernv: Introduce new PHB type for opencapi links 2018-01-24 11:42:56 +11:00
powernv.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
rng.c powerpc: Convert to using %pOF instead of full_name 2017-08-23 22:27:04 +10:00
setup.c powerpc/powernv: Always stop secondaries before reboot/shutdown 2018-04-03 22:59:57 +10:00
smp.c powerpc/64: Use array of paca pointers and allocate pacas individually 2018-03-30 23:34:23 +11:00
subcore-asm.S powerpc/powernv: Add support for POWER8 split core on powernv 2014-05-28 13:35:37 +10:00
subcore.c powerpc/64: Use array of paca pointers and allocate pacas individually 2018-03-30 23:34:23 +11:00
subcore.h powernv/powerpc: Add winkle support for offline cpus 2014-12-15 10:46:41 +11:00
vas-debug.c powerpc/vas: Fix cleanup when VAS is not configured 2018-03-14 20:11:37 +11:00
vas-trace.h powerpc/vas: Add a couple of trace points 2018-03-14 20:13:58 +11:00
vas-window.c powerpc/vas: Add a couple of trace points 2018-03-14 20:13:58 +11:00
vas.c powerpc/vas: Fix cleanup when VAS is not configured 2018-03-14 20:11:37 +11:00
vas.h powerpc/vas: Define vas_win_id() 2017-11-12 09:03:10 +11:00