Re: [PATCH] powerpc/6xx: Fix power_save_ppc32_restore() with CONFIG_VMAP_STACK
From: Michael Ellerman <hidden>
Date: 2020-02-19 12:40:07
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On Fri, 2020-02-14 at 06:53:00 UTC, Christophe Leroy wrote:
power_save_ppc32_restore() is called during exception entry, before
re-enabling the MMU. It substracts KERNELBASE from the address
of nap_save_msscr0 to access it.
With CONFIG_VMAP_STACK enabled, data MMU translation has already been
re-enabled, so power_save_ppc32_restore() has to access
nap_save_msscr0 by its virtual address.
Reported-by: Larry Finger <redacted>
Signed-off-by: Christophe Leroy <redacted>
Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK")
Tested-by: Larry Finger <redacted>Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/477f3488a94e35380c82a7498d46f10fa5f3edd2 cheers