u-boot/arch/arm/cpu
Andre Przywara ce9c579e2b armv8: always use current exception level for TCR_ELx access
Currently get_tcr() takes an "el" parameter, to select the proper
version of the TCR_ELx system register.
This is problematic in case of the Apple M1, since it runs with
HCR_EL2.E2H fixed to 1, so TCR_EL2 is actually using the TCR_EL1 layout,
and we get the wrong version.

For U-Boot's purposes the only sensible choice here is the current
exception level, and indeed most callers treat it like that, so let's
remove that parameter and read the current EL inside the function.
This allows us to check for the E2H bit, and pretend it's EL1 in this
case.

There are two callers which don't care about the EL, and they pass 0,
which looks wrong, but is irrelevant in these two cases, since we don't
use the return value there. So the change cannot affect those two.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Mark Kettenis <kettenis@openbsd.org>
Tested-by: Mark Kettenis <kettenis@openbsd.org>
2022-06-16 15:22:55 -04:00
..
arm11 common: Drop net.h from common header 2020-05-18 17:33:31 -04:00
arm720t Convert CONFIG_SKIP_LOWLEVEL_INIT et al to Kconfig 2021-08-31 17:47:49 -04:00
arm920t arm: Remove unused ep93xx code 2022-04-08 10:46:22 -04:00
arm926ejs sunxi: f1c100s: Fix FEL registers restore 2022-03-03 01:24:06 +00:00
arm946es Convert CONFIG_SKIP_LOWLEVEL_INIT et al to Kconfig 2021-08-31 17:47:49 -04:00
arm1136 arm: Remove flea3 board 2021-10-01 12:08:19 -04:00
arm1176 SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
armv7 caam: Fix crash in case caam_jr_probe failed 2022-05-20 12:36:47 +02:00
armv7m common: spl: move armv7m-specific code to spl_perform_fixups() 2022-01-18 08:31:02 -05:00
armv8 armv8: always use current exception level for TCR_ELx access 2022-06-16 15:22:55 -04:00
pxa Convert CONFIG_SKIP_LOWLEVEL_INIT et al to Kconfig 2021-08-31 17:47:49 -04:00
sa1100 Convert CONFIG_SKIP_LOWLEVEL_INIT et al to Kconfig 2021-08-31 17:47:49 -04:00
Makefile SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
u-boot-spl.lds spl: fix linker size check off-by-one errors 2019-05-05 08:48:50 -04:00
u-boot.lds ARM: Specify aligned address for secure section instead of using attributes 2018-09-07 09:11:42 -04:00