@@ -1003,9 +1003,25 @@ 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) {}
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. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> --- arch/arm/kernel/setup.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)