PAGE_KERNEL_RO);
}
+static bool crash_mem_map __initdata;
+
+static int __init enable_crash_mem_map(char *arg)
+{
+ /*
+ * Proper parameter parsing is done by reserve_crashkernel(). We only
+ * need to know if the linear map has to avoid block mappings so that
+ * the crashkernel reservations can be unmapped later.
+ */
+ crash_mem_map = true;
+
+ return 0;
+}
+early_param("crashkernel", enable_crash_mem_map);
+
static void __init map_mem(pgd_t *pgdp)
{
phys_addr_t kernel_start = __pa_symbol(_text);
int flags = 0;
u64 i;
- if (rodata_full || debug_pagealloc_enabled())
+ if (rodata_full || crash_mem_map || debug_pagealloc_enabled())
flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS;
/*
* the following for-loop
*/
memblock_mark_nomap(kernel_start, kernel_end - kernel_start);
-#ifdef CONFIG_KEXEC_CORE
- if (crashk_res.end)
- memblock_mark_nomap(crashk_res.start,
- resource_size(&crashk_res));
-#endif
/* map all the memory banks */
for_each_mem_range(i, &start, &end) {
__map_memblock(pgdp, kernel_start, kernel_end,
PAGE_KERNEL, NO_CONT_MAPPINGS);
memblock_clear_nomap(kernel_start, kernel_end - kernel_start);
-
-#ifdef CONFIG_KEXEC_CORE
- /*
- * Use page-level mappings here so that we can shrink the region
- * in page granularity and put back unused memory to buddy system
- * through /sys/kernel/kexec_crash_size interface.
- */
- if (crashk_res.end) {
- __map_memblock(pgdp, crashk_res.start, crashk_res.end + 1,
- PAGE_KERNEL,
- NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS);
- memblock_clear_nomap(crashk_res.start,
- resource_size(&crashk_res));
- }
-#endif
}
void mark_rodata_ro(void)