[PATCH v2 1/3] x86/KASLR: Update document about KERNEL_IMAGE_SIZE
From: Baoquan He <hidden>
Date: 2018-09-26 23:58:38
Also in:
lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Currently CONFIG_RANDOMIZE_BASE=y is default set, update the relevant document about KERNEL_IMAGE_SIZE. Signed-off-by: Baoquan He <redacted> --- arch/x86/include/asm/page_64_types.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index 6afac386a434..2288ceabdb9c 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h@@ -61,9 +61,10 @@ /* * Kernel image size is limited to 1GiB due to the fixmap living in the * next 1GiB (see level2_kernel_pgt in arch/x86/kernel/head_64.S). Use - * 512MiB by default, leaving 1.5GiB for modules once the page tables - * are fully set up. If kernel ASLR is configured, it can extend the - * kernel page table mapping, reducing the size of the modules area. + * 1 GiB by default, leaving 1 GiB for modules once the page tables are + * fully set up. If kernel ASLR is not configured, it can shrink the + * kernel page table mapping to decrease the size of kernel area to 512 + * MiB, increase the size of the modules area to 1.5 GiB. */ #if defined(CONFIG_RANDOMIZE_BASE) #define KERNEL_IMAGE_SIZE (1024 * 1024 * 1024)
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2.13.6