kernel/arch/s390/include/asm/alternative-asm.h, branch linux-5.14.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-5.14.y2018-03-28T06:38:27Zs390: add assembler macros for CPU alternatives2018-03-28T06:38:27ZMartin Schwidefskyschwidefsky@de.ibm.com2018-03-19T17:07:31Zurn:sha1:fba9eb7946251d6e420df3bdf7bc45195be7be9a
Add a header with macros usable in assembler files to emit alternative
code sequences. It works analog to the alternatives for inline assmeblies
in C files, with the same restrictions and capabilities.
The syntax is
ALTERNATIVE "<default instructions sequence>", \
"<alternative instructions sequence>", \
"<features-bit>"
and
ALTERNATIVE_2 "<default instructions sequence>", \
"<alternative instructions sqeuence #1>", \
"<feature-bit #1>",
"<alternative instructions sqeuence #2>", \
"<feature-bit #2>"
Reviewed-by: Vasily Gorbik <gor@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>