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 @@ -1000,9 +1000,25 @@ 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) {} _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
