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arm64: kexec_file: invoke the kernel without purgatory

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On arm64, purgatory would do almost nothing. So just invoke secondary
kernel directly by jumping into its entry code.

While, in this case, cpu_soft_restart() must be called with dtb address
in the fifth argument, the behavior still stays compatible with kexec_load
case as long as the argument is null.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: James Morse <james.morse@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
AKASHI Takahiro
2018-11-15 14:52:52 +09:00
committed by Will Deacon
parent f3b70e5094
commit 4c9e7e649a
3 changed files with 16 additions and 7 deletions
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3
arch/arm64/kernel/relocate_kernel.S
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@@ -32,6 +32,7 @@
ENTRY(arm64_relocate_new_kernel)
/* Setup the list loop variables. */
mov x18, x2 /* x18 = dtb address */
mov x17, x1 /* x17 = kimage_start */
mov x16, x0 /* x16 = kimage_head */
raw_dcache_line_size x15, x0 /* x15 = dcache line size */
@@ -107,7 +108,7 @@ ENTRY(arm64_relocate_new_kernel)
isb
/* Start new image. */
mov x0, xzr
mov x0, x18
mov x1, xzr
mov x2, xzr
mov x3, xzr