From 4c9e7e649a3f291e1b939299458e6844c16afe70 Mon Sep 17 00:00:00 2001 From: AKASHI Takahiro Date: Thu, 15 Nov 2018 14:52:52 +0900 Subject: arm64: kexec_file: invoke the kernel without purgatory 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 Reviewed-by: James Morse Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Will Deacon --- arch/arm64/kernel/machine_kexec.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'arch/arm64/kernel/machine_kexec.c') diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 922add8adb74..aa9c94113700 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -212,9 +212,17 @@ void machine_kexec(struct kimage *kimage) * uses physical addressing to relocate the new image to its final * position and transfers control to the image entry point when the * relocation is complete. + * In kexec case, kimage->start points to purgatory assuming that + * kernel entry and dtb address are embedded in purgatory by + * userspace (kexec-tools). + * In kexec_file case, the kernel starts directly without purgatory. */ - - cpu_soft_restart(reboot_code_buffer_phys, kimage->head, kimage->start, 0); + cpu_soft_restart(reboot_code_buffer_phys, kimage->head, kimage->start, +#ifdef CONFIG_KEXEC_FILE + kimage->arch.dtb_mem); +#else + 0); +#endif BUG(); /* Should never get here. */ } -- cgit