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author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2021-09-30 14:31:05 +0000 |
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committer | Will Deacon <will@kernel.org> | 2021-10-01 13:31:00 +0100 |
commit | 878fdbd704864352b9b11e29805e92ffa182904e (patch) | |
tree | 2cd5ea9691154cd87031b656a53f88174d99d9f9 /arch/arm64/mm | |
parent | 3036ec599332cdfb406249270e50ad3f1a5c5940 (diff) | |
download | linux-878fdbd704864352b9b11e29805e92ffa182904e.tar.bz2 |
arm64: kexec: pass kimage as the only argument to relocation function
Currently, kexec relocation function (arm64_relocate_new_kernel) accepts
the following arguments:
head: start of array that contains relocation information.
entry: entry point for new kernel or purgatory.
dtb_mem: first and only argument to entry.
The number of arguments cannot be easily expended, because this
function is also called from HVC_SOFT_RESTART, which preserves only
three arguments. And, also arm64_relocate_new_kernel is written in
assembly but called without stack, thus no place to move extra arguments
to free registers.
Soon, we will need to pass more arguments: once we enable MMU we
will need to pass information about page tables.
Pass kimage to arm64_relocate_new_kernel, and teach it to get the
required fields from kimage.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210930143113.1502553-8-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
0 files changed, 0 insertions, 0 deletions