Greg Kroah-Hartman gregkh@linuxfoundation.org writes:
6.9-stable review patch. If anyone has any objections, please let me know.
From: Benjamin Gray bgray@linux.ibm.com
[ Upstream commit 75171f06c4507c3b6b5a69d793879fb20d108bb1 ]
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 Stable-dep-of: bbd99922d0f4 ("powerpc/dexcr: Reset DEXCR value across exec")
This is listed as a dep, but I don't see that commit (bbd99922d0f4) queued up?
This series included user-visible changes including new prctls, it shouldn't be backported piecemeal.
I think this series shouldn't be backported unless someone explicitly wants it.
cheers