Commit 84c57dbd authored by James Morse's avatar James Morse Committed by Will Deacon
Browse files

arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 



Since commit 23c85094 ("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 <takahiro.akashi@linaro.org>
Reviewed-by: default avatarBhupesh Sharma <bhsharma@redhat.com>
Signed-off-by: default avatarJames Morse <james.morse@arm.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 13aceef0

arch/arm64/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -54,6 +54,7 @@ arm64-obj-$(CONFIG_KEXEC) += machine_kexec.o relocate_kernel.o \ 
arm64-obj-$(CONFIG_ARM64_RELOC_TEST)	+= arm64-reloc-test.o

arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o

arm64-obj-$(CONFIG_CRASH_DUMP)		+= crash_dump.o

arm64-obj-$(CONFIG_CRASH_CORE)		+= crash_core.o

arm64-obj-$(CONFIG_ARM_SDE_INTERFACE)	+= sdei.o

arm64-obj-$(CONFIG_ARM64_SSBD)		+= ssbd.o

arch/arm64/kernel/crash_core.c

0 → 100644
+19 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) Linaro.

 * Copyright (C) Huawei Futurewei Technologies.

 */



#include <linux/crash_core.h>

#include <asm/memory.h>



void arch_crash_save_vmcoreinfo(void)

{

	VMCOREINFO_NUMBER(VA_BITS);

	/* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */

	vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",

						kimage_voffset);

	vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",

						PHYS_OFFSET);

	vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());

}

arch/arm64/kernel/machine_kexec.c

+0 −11
Original line number Diff line number Diff line
@@ -358,14 +358,3 @@ void crash_free_reserved_phys_range(unsigned long begin, unsigned long end) 
	}

}

#endif /* CONFIG_HIBERNATION */
 


void arch_crash_save_vmcoreinfo(void)

{

	VMCOREINFO_NUMBER(VA_BITS);

	/* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */

	vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",

						kimage_voffset);

	vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",

						PHYS_OFFSET);

	vmcoreinfo_append_str("KERNELOFFSET=%lx\n", kaslr_offset());

}

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