diff options
author | Vincenzo Frascino <vincenzo.frascino@arm.com> | 2020-12-22 12:01:42 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-22 12:55:07 -0800 |
commit | 620954a67bcec6ca6b902baaaa1e3f2601b371a7 (patch) | |
tree | e259f490abfa25e9eddc4d19f1349918390bc6d5 /arch/sparc/lib/NG4patch.S | |
parent | bfc62c5985274e926ee959dd3aaf999d4bdfbb1d (diff) |
arm64: mte: convert gcr_user into an exclude mask
The gcr_user mask is a per thread mask that represents the tags that are
excluded from random generation when the Memory Tagging Extension is
present and an 'irg' instruction is invoked.
gcr_user affects the behavior on EL0 only.
Currently that mask is an include mask and it is controlled by the user
via prctl() while GCR_EL1 accepts an exclude mask.
Convert the include mask into an exclude one to make it easier the
register setting.
Note: This change will affect gcr_kernel (for EL1) introduced with a
future patch.
Link: https://lkml.kernel.org/r/946dd31be833b660334c4f93410acf6d6c4cf3c4.1606161801.git.andreyknvl@google.com
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Branislav Rankov <Branislav.Rankov@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Kevin Brodsky <kevin.brodsky@arm.com>
Cc: Marco Elver <elver@google.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sparc/lib/NG4patch.S')
0 files changed, 0 insertions, 0 deletions