powerpc/6xx: set High BAT Enable flag on G2_LE cores

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[ Upstream commit a038a3ff8c ]

MMU_FTR_USE_HIGH_BATS is set for G2_LE cores and derivatives like e300cX,
but the high BATs need to be enabled in HID2 to work. Add register
definitions and add the needed setup to __setup_cpu_603.

This fixes boot on CPUs like the MPC5200B with STRICT_KERNEL_RWX enabled
on systems where the flag has not been set by the bootloader already.

Fixes: e4d6654ebe ("powerpc/mm/32s: rework mmu_mapin_ram()")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240124103838.43675-1-matthias.schiffer@ew.tq-group.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Matthias Schiffer 2024-01-24 11:38:38 +01:00 • committed by Greg Kroah-Hartman

parent 12b55cfdd3

commit 04375cb094

2 changed files with 21 additions and 1 deletions

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2

arch/powerpc/include/asm/reg.h

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20

arch/powerpc/kernel/cpu_setup_6xx.S

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