diff options
| author | Vasily Gorbik <[email protected]> | 2024-01-17 11:50:49 +0100 |
|---|---|---|
| committer | Alexander Gordeev <[email protected]> | 2024-04-17 13:38:03 +0200 |
| commit | ba05b39d54eef78043b5c8ee90545cb06a98ae6f (patch) | |
| tree | 418a03082771eedde694ef99a12334276b3e21d7 /arch/s390/lib/expoline.S | |
| parent | ea84f14d2a6b1a4fde17d2713dbdfdef7b84da87 (diff) | |
s390/expoline: Make modules use kernel expolines
Currently, kernel modules contain their own set of expoline thunks. In
the case of EXPOLINE_EXTERN, this involves postlinking of precompiled
expoline.o. expoline.o is also necessary for out-of-source tree module
builds.
Now that the kernel modules area is less than 4 GB away from
kernel expoline thunks, make modules use kernel expolines. Also make
EXPOLINE_EXTERN the default if the compiler supports it. This simplifies
build and aligns with the approach adopted by other architectures.
Signed-off-by: Vasily Gorbik <[email protected]>
Signed-off-by: Alexander Gordeev <[email protected]>
Diffstat (limited to 'arch/s390/lib/expoline.S')
| -rw-r--r-- | arch/s390/lib/expoline.S | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/lib/expoline.S b/arch/s390/lib/expoline.S new file mode 100644 index 000000000000..92ed8409a7a4 --- /dev/null +++ b/arch/s390/lib/expoline.S @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include <asm/nospec-insn.h> +#include <linux/linkage.h> + +.macro GEN_ALL_BR_THUNK_EXTERN + .irp r1,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + GEN_BR_THUNK_EXTERN %r\r1 + .endr +.endm + +GEN_ALL_BR_THUNK_EXTERN |