Searched hist:"2 b1dac4b5f97ea88fb01dfcab7fc24500b5dea95" (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/arch/powerpc/kernel/ |
| H A D | interrupt_64.S | diff 2b1dac4b5f97ea88fb01dfcab7fc24500b5dea95 Wed Sep 21 01:55:44 CDT 2022 Rohan McLure <rmclure@linux.ibm.com> powerpc/64s: Use {ZEROIZE,SAVE,REST}_GPRS macros in sc, scv 0 handlers
Use the convenience macros for saving/clearing/restoring gprs in keeping
with syscall calling conventions. The plural variants of these macros
can store a range of registers for concision.
This works well when the user gpr value we are hoping to save is still
live. In the syscall interrupt handlers, user register state is
sometimes juggled between registers. Hold-off from issuing the SAVE_GPR
macro for applicable neighbouring lines to highlight the delicate
register save logic.
Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921065605.1051927-5-rmclure@linux.ibm.com
|