diff options
| author | Aneesh Kumar K.V <[email protected]> | 2020-07-09 08:59:41 +0530 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2020-07-20 22:57:59 +1000 |
| commit | 000a42b35a54372597f0657f6b9875b38c641864 (patch) | |
| tree | 755256c0c901e1437d79c4c336de70075ff40975 /arch/powerpc/include/asm/kexec.h | |
| parent | 7cdd3745f2d75aecc2b61368e2563ae54bfac59a (diff) | |
powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec
As we kexec across kernels that use AMR/IAMR for different purposes
we need to ensure that new kernels get kexec'd with a reset value
of AMR/IAMR. For ex: the new kernel can use key 0 for kernel mapping and the old
AMR value prevents access to key 0.
This patch also removes reset if IAMR and AMOR in kexec_sequence. Reset of AMOR
is not needed and the IAMR reset is partial (it doesn't do the reset
on secondary cpus) and is redundant with this patch.
Signed-off-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'arch/powerpc/include/asm/kexec.h')
| -rw-r--r-- | arch/powerpc/include/asm/kexec.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index c68476818753..89f7e3462292 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -150,6 +150,18 @@ static inline void crash_send_ipi(void (*crash_ipi_callback)(struct pt_regs *)) } #endif /* CONFIG_KEXEC_CORE */ + +#ifdef CONFIG_PPC_BOOK3S_64 +#include <asm/book3s/64/kexec.h> +#endif + +#ifndef reset_sprs +#define reset_sprs reset_sprs +static inline void reset_sprs(void) +{ +} +#endif + #endif /* ! __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_KEXEC_H */ |