Skip to main content

Browse the archive

https://github.com/torvalds/linux
17 May 2024, 09:02:56 UTC
Revision bbd5ff50afffcf4a01d05367524736c57607a478 authored by Alistair Popple on 20 June 2017, 08:37:28 UTC, committed by Michael Ellerman on 22 June 2017, 11:21:08 UTC 
powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD
 
NPU2 requires an extra explicit flush to an active GPU PID when
sending address translation shoot downs (ATSDs) to reliably flush the
GPU TLB. This patch adds just such a flush at the end of each sequence
of ATSDs.

We can safely use PID 0 which is always reserved and active on the
GPU. PID 0 is only used for init_mm which will never be a user mm on
the GPU. To enforce this we add a check in pnv_npu2_init_context()
just in case someone tries to use PID 0 on the GPU.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
[mpe: Use true/false for bool literals]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
1 parent bf05fc2
History
Tip revision: bbd5ff50afffcf4a01d05367524736c57607a478 authored by Alistair Popple on 20 June 2017, 08:37:28 UTC
powerpc/powernv/npu-dma: Add explicit flush when sending an ATSD
Tip revision: bbd5ff5
File Mode Size
Documentation
arch
block
certs
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 96.2 KB
Kbuild -rw-r--r-- 2.2 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 397.6 KB
Makefile -rw-r--r-- 58.6 KB
README -rw-r--r-- 722 bytes

README

back to top