ARM: kdump: advertise boot aliased crash kernel resource (f7f0b7dc) · Commits · 戴 / test

Advertise a resource which describes where the crash kernel is located in the boot view of RAM. This allows kexec-tools to have this vital information. Link: http://lkml.kernel.org/r/E1b8knz-0004H4-Bd@rmk-PC.armlinux.org.uk Signed-off-by:

Russell King <rmk+kernel@arm.linux.org.uk> Cc: Baoquan He <bhe@redhat.com> Cc: Keerthy <j-keerthy@ti.com> Cc: Pratyush Anand <panand@redhat.com> Cc: Vitaly Andrianov <vitalya@ti.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Dave Young <dyoung@redhat.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Simon Horman <horms@verge.net.au> Signed-off-by:

Andrew Morton <akpm@linux-foundation.org> Signed-off-by:

Linus Torvalds <torvalds@linux-foundation.org>

arch/arm/kernel/setup.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -1000,9 +1000,25 @@ static void __init reserve_crashkernel(void)
		(unsigned long)(crash_base >> 20),
		(unsigned long)(total_mem >> 20));

		/* The crashk resource must always be located in normal mem */
		crashk_res.start = crash_base;
		crashk_res.end = crash_base + crash_size - 1;
		insert_resource(&iomem_resource, &crashk_res);

		if (arm_has_idmap_alias()) {
		/*
		* If we have a special RAM alias for use at boot, we
		* need to advertise to kexec tools where the alias is.
		*/
		static struct resource crashk_boot_res = {
		.name = "Crash kernel (boot alias)",
		.flags = IORESOURCE_BUSY \| IORESOURCE_MEM,
		};

		crashk_boot_res.start = phys_to_idmap(crash_base);
		crashk_boot_res.end = crashk_boot_res.start + crash_size - 1;
		insert_resource(&iomem_resource, &crashk_boot_res);
		}
		}
		#else
		static inline void reserve_crashkernel(void) {}

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