powerpc/dexcr: Track the DEXCR per-process

Browse source

Add capability to make the DEXCR act as a per-process SPR.

We do not yet have an interface for changing the values per task. We
also expect the kernel to use a single DEXCR value across all tasks
while in privileged state, so there is no need to synchronize after
changing it (the userspace aspects will synchronize upon returning to
userspace).

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240417112325.728010-3-bgray@linux.ibm.com

...

This commit is contained in:

Benjamin Gray 2024-04-17 21:23:18 +10:00 • committed by Michael Ellerman

parent d7228a58d9

commit 75171f06c4

3 changed files with 12 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/powerpc/include/asm/processor.h

View file

10

arch/powerpc/kernel/process.c

View file

7

arch/powerpc/kernel/ptrace/ptrace-view.c

View file