diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2021-09-30 14:31:09 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-10-01 13:31:00 +0100 |
| commit | 3744b5280e67f54579abe92576deec0079242323 (patch) | |
| tree | e0a9a519d17edcebe48b5af1acecde8ab95f202c /arch/arm64/include/asm/kexec.h | |
| parent | 19a046f07ce5a5c34ebb6432192d98cfdb38444f (diff) | |
arm64: kexec: install a copy of the linear-map
To perform the kexec relocation with the MMU enabled, we need a copy
of the linear map.
Create one, and install it from the relocation code. This has to be done
from the assembly code as it will be idmapped with TTBR0. The kernel
runs in TTRB1, so can't use the break-before-make sequence on the mapping
it is executing from.
The makes no difference yet as the relocation code runs with the MMU
disabled.
Suggested-by: James Morse <james.morse@arm.com>
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210930143113.1502553-12-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/kexec.h')
| -rw-r--r-- | arch/arm64/include/asm/kexec.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kexec.h b/arch/arm64/include/asm/kexec.h index 753a1c398898..d678f0ceb7ee 100644 --- a/arch/arm64/include/asm/kexec.h +++ b/arch/arm64/include/asm/kexec.h @@ -97,6 +97,8 @@ struct kimage_arch { phys_addr_t dtb_mem; phys_addr_t kern_reloc; phys_addr_t el2_vectors; + phys_addr_t ttbr1; + phys_addr_t zero_page; }; #ifdef CONFIG_KEXEC_FILE |