[RFC PATCH 02/10] arm64: use more granular reservations for static page table allocations
From: Ard Biesheuvel <hidden>
Date: 2015-12-28 11:20:46
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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 <redacted> --- arch/arm64/mm/init.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 6bacba847923..8e678d05ad84 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c@@ -36,6 +36,7 @@ #include <linux/swiotlb.h> #include <asm/fixmap.h> +#include <asm/kernel-pgtable.h> #include <asm/memory.h> #include <asm/sections.h> #include <asm/setup.h>
@@ -165,11 +166,13 @@ 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();
--
2.5.0