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[v2,2/7] arm64: use more granular reservations for static page table allocations

Message ID 1442968663-31843-3-git-send-email-ard.biesheuvel@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Ard Biesheuvel Sept. 23, 2015, 12:37 a.m. UTC 
Before introducing new statically allocated page tables and increasing
their alignment in subsequent patches, update the reservation logic
so that only pages that are in actual use end up as reserved with
memblock.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 arch/arm64/mm/init.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index f5c0680d17d9..b9390eb1e29f 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -37,6 +37,7 @@ 
 
 #include <asm/fixmap.h>
 #include <asm/memory.h>
+#include <asm/mmu_context.h>
 #include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/sizes.h>
@@ -164,11 +165,13 @@  void __init arm64_memblock_init(void)
 	 * Register the kernel text, kernel data, initrd, and initial
 	 * pagetables with memblock.
 	 */
-	memblock_reserve(__pa(_text), _end - _text);
+	memblock_reserve(__pa(_text), __bss_stop - _text);
 #ifdef CONFIG_BLK_DEV_INITRD
 	if (initrd_start)
 		memblock_reserve(__virt_to_phys(initrd_start), initrd_end - initrd_start);
 #endif
+	memblock_reserve(__pa(idmap_pg_dir), IDMAP_DIR_SIZE);
+	memblock_reserve(__pa(swapper_pg_dir), SWAPPER_DIR_SIZE);
 
 	early_init_fdt_scan_reserved_mem();