The patch titled
Subject: ARM: kdump: advertise boot aliased crash kernel resource
has been added to the -mm tree. Its filename is
arm-kdump-advertise-boot-aliased-crash-kernel-resource.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/arm-kdump-advertise-boot-aliased-crash-kernel-resource.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/arm-kdump-advertise-boot-aliased-crash-kernel-resource.patch
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------------------------------------------------------
From: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Subject: ARM: kdump: advertise boot aliased crash kernel resource
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@xxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: Baoquan He <bhe@xxxxxxxxxx>
Cc: Keerthy <j-keerthy@xxxxxx>
Cc: Pratyush Anand <panand@xxxxxxxxxx>
Cc: Vitaly Andrianov <vitalya@xxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: Dave Young <dyoung@xxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Cc: Simon Horman <horms@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/kernel/setup.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff -puN arch/arm/kernel/setup.c~arm-kdump-advertise-boot-aliased-crash-kernel-resource arch/arm/kernel/setup.c
--- a/arch/arm/kernel/setup.c~arm-kdump-advertise-boot-aliased-crash-kernel-resource
+++ a/arch/arm/kernel/setup.c
@@ -1006,9 +1006,25 @@ static void __init reserve_crashkernel(v
(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) {}
_
Patches currently in -mm which might be from rmk+kernel@xxxxxxxxxxxxxxxx are
arm-kdump-advertise-boot-aliased-crash-kernel-resource.patch
arm-kexec-advertise-location-of-bootable-ram.patch
kexec-dont-invoke-oom-killer-for-control-page-allocation.patch
kexec-ensure-user-memory-sizes-do-not-wrap.patch
kdump-arrange-for-paddr_vmcoreinfo_note-to-return-phys_addr_t.patch
kexec-allow-architectures-to-override-boot-mapping.patch
arm-kexec-fix-kexec-for-keystone-2.patch
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