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ARM: kexec: remove 512MB restriction on kexec crashdump

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The real limit is the top of the visible physical address space with
the MMU turned off.  Hence, we need to limit the crash kernel allocation
running-view physical address of the top of the boot-view physical
address space.

Reviewed-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2016-04-01 14:47:36 +01:00
parent 981b6714db
commit d0506a2395
1 changed files with 1 additions and 4 deletions
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5
arch/arm/kernel/setup.c
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@@ -943,7 +943,6 @@ late_initcall(init_machine_late);
* zImage relocating below the reserved region.
*/
#define CRASH_ALIGN (128 << 20)
#define CRASH_ADDR_MAX (PHYS_OFFSET + (512 << 20))
static inline unsigned long long get_total_mem(void)
{
@@ -973,9 +972,7 @@ static void __init reserve_crashkernel(void)
return;
if (crash_base <= 0) {
unsigned long long crash_max = CRASH_ADDR_MAX;
if (crash_max > (u32)~0)
crash_max = (u32)~0;
unsigned long long crash_max = idmap_to_phys((u32)~0);
crash_base = memblock_find_in_range(CRASH_ALIGN, crash_max,
crash_size, CRASH_ALIGN);
if (!crash_base) {