linux

iv/linux

History

Rohan McLure cbf892ba56 powerpc/64: Add interrupt register sanitisation macros

Include in asm/ppc_asm.h macros to be used in multiple successive
patches to implement zeroising architected registers in interrupt
handlers. Registers will be sanitised in this fashion in future patches
to reduce the speculation influence of user-controlled register values.
These mitigations will be configurable through the
CONFIG_INTERRUPT_SANITIZE_REGISTERS Kconfig option.

Included are macros for conditionally zeroising registers and restoring
as required with the mitigation enabled. With the mitigation disabled,
non-volatiles must be restored on demand at separate locations to
those required by the mitigation.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221201071019.1953023-2-rmclure@linux.ibm.com

2022-12-02 20:45:57 +11:00

boot

powerpc: dts: turris1x.dts: Add channel labels for temperature sensor

2022-11-30 21:46:48 +11:00

configs

- Yu Zhao's Multi-Gen LRU patches are here. They've been under test in

2022-10-10 17:53:04 -07:00

crypto

treewide: use get_random_bytes() when possible

2022-10-11 17:42:58 -06:00

include

powerpc/64: Add interrupt register sanitisation macros