kernel.git/arch/arm64/kernel/machine_kexec.c, branch linux-5.10.y

arm64: fix the flush_icache_range arguments in machine_kexec

2020-05-11T11:02:14Z

The second argument is the end "pointer", not the length. Fixes: d28f6df1305a ("arm64/kexec: Add core kexec support") Cc: # 4.8.x- Signed-off-by: Christoph Hellwig Signed-off-by: Catalin Marinas

Revert "arm64: kexec: make dtb_mem always enabled"

2020-01-10T16:00:50Z

Adding crash dump support to 'kexec_file' is going to extend 'struct kimage_arch' with more 'kexec_file'-specific members. The cleanup here then starts to get in the way, so revert it. This reverts commit 621516789ee6e285cb2088fe4706eedd030d38bf. Reported-by: AKASHI Takahiro Signed-off-by: Will Deacon

arm64: kexec: make dtb_mem always enabled

2020-01-08T16:32:55Z

Currently, dtb_mem is enabled only when CONFIG_KEXEC_FILE is enabled. This adds ugly ifdefs to c files. Always enabled dtb_mem, when it is not used, it is NULL. Change the dtb_mem to phys_addr_t, as it is a physical address. Signed-off-by: Pavel Tatashin Signed-off-by: Will Deacon

arm64: kexec: remove unnecessary debug prints

2020-01-08T16:32:55Z

The kexec_image_info() outputs all the necessary information about the upcoming kexec. The extra debug printfs in machine_kexec() are not needed. Signed-off-by: Pavel Tatashin Signed-off-by: Will Deacon

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55Z

Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Enrico Weigelt Reviewed-by: Kate Stewart Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman

arm64: kdump: no need to mark crashkernel pages manually PG_reserved

2019-03-06T05:07:19Z

The crashkernel is reserved via memblock_reserve(). memblock_free_all() will call free_low_memory_core_early(), which will go over all reserved memblocks, marking the pages as PG_reserved. So manually marking pages as PG_reserved is not necessary, they are already in the desired state (otherwise they would have been handed over to the buddy as free pages and bad things would happen). Link: http://lkml.kernel.org/r/20190114125903.24845-8-david@redhat.com Signed-off-by: David Hildenbrand Reviewed-by: Matthias Brugger Reviewed-by: Bhupesh Sharma Cc: Catalin Marinas Cc: Will Deacon Cc: James Morse Cc: David Hildenbrand Cc: Mark Rutland Cc: Dave Kleikamp Cc: Mike Rapoport Cc: Michal Hocko Cc: Florian Fainelli Cc: Stefan Agner Cc: Laura Abbott Cc: Greg Hackmann Cc: Johannes Weiner Cc: Kristina Martsenko Cc: CHANDAN VN Cc: AKASHI Takahiro Cc: Logan Gunthorpe Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

arm64: kexec: no need to ClearPageReserved()

2019-03-06T05:07:19Z

This will be done by free_reserved_page(). Link: http://lkml.kernel.org/r/20190114125903.24845-7-david@redhat.com Signed-off-by: David Hildenbrand Acked-by: James Morse Reviewed-by: Bhupesh Sharma Cc: Catalin Marinas Cc: Will Deacon Cc: James Morse Cc: Marc Zyngier Cc: Dave Kleikamp Cc: Mark Rutland Cc: Michal Hocko Cc: Matthew Wilcox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

arm64: kexec_file: invoke the kernel without purgatory

2018-12-06T14:38:53Z

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

arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE

2018-09-11T10:08:49Z

Since commit 23c85094fe18 ("proc/kcore: add vmcoreinfo note to /proc/kcore") the kernel has exported the vmcoreinfo PT_NOTE on /proc/kcore as well as /proc/vmcore. arm64 only exposes it's additional arch information via arch_crash_save_vmcoreinfo() if built with CONFIG_KEXEC, as kdump was previously the only user of vmcoreinfo. Move this weak function to a separate file that is built at the same time as its caller in kernel/crash_core.c. This ensures values like 'kimage_voffset' are always present in the vmcoreinfo PT_NOTE. CC: AKASHI Takahiro Reviewed-by: Bhupesh Sharma Signed-off-by: James Morse Signed-off-by: Will Deacon

arm64: kexec: Add comment to explain use of __flush_icache_range()

2018-07-31T11:10:38Z

Now that we understand the deadlock arising from flush_icache_range() on the kexec crash kernel path, add a comment to justify the use of __flush_icache_range() here. Reported-by: Dave Kleikamp Signed-off-by: Will Deacon