Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b422a309 authored by Yinghai Lu's avatar Yinghai Lu Committed by H. Peter Anvin
Browse files

x86: Factor out e820_add_kernel_range() 



Separate out the reservation of the kernel static memory areas into a
separate function.

Also add support for case when memmap=xxM$yyM is used without exactmap.
Need to remove reserved range at first before we add E820_RAM
range, otherwise added E820_RAM range will be ignored.

Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1359058816-7615-5-git-send-email-yinghai@kernel.org


Cc: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent c9b3234a

arch/x86/kernel/setup.c

+22 −14
Original line number Diff line number Diff line
@@ -702,6 +702,27 @@ static void __init trim_bios_range(void) 
	sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);

}



/* called before trim_bios_range() to spare extra sanitize */

static void __init e820_add_kernel_range(void)

{

	u64 start = __pa_symbol(_text);

	u64 size = __pa_symbol(_end) - start;



	/*

	 * Complain if .text .data and .bss are not marked as E820_RAM and

	 * attempt to fix it by adding the range. We may have a confused BIOS,

	 * or the user may have used memmap=exactmap or memmap=xxM$yyM to

	 * exclude kernel range. If we really are running on top non-RAM,

	 * we will crash later anyways.

	 */

	if (e820_all_mapped(start, start + size, E820_RAM))

		return;



	pr_warn(".text .data .bss are not marked as E820_RAM!\n");

	e820_remove_range(start, size, E820_RAM, 0);

	e820_add_region(start, size, E820_RAM);

}



static int __init parse_reservelow(char *p)

{

	unsigned long long size;
@@ -897,20 +918,7 @@ void __init setup_arch(char **cmdline_p) 
	insert_resource(&iomem_resource, &data_resource);

	insert_resource(&iomem_resource, &bss_resource);



	/*

	 * Complain if .text .data and .bss are not marked as E820_RAM and

	 * attempt to fix it by adding the range. We may have a confused BIOS,

	 * or the user may have incorrectly supplied it via memmap=exactmap. If

	 * we really are running on top non-RAM, we will crash later anyways.

	 */

	if (!e820_all_mapped(code_resource.start, __pa(__brk_limit), E820_RAM)) {

		pr_warn(".text .data .bss are not marked as E820_RAM!\n");



		e820_add_region(code_resource.start,

				__pa(__brk_limit) - code_resource.start + 1,

				E820_RAM);

	}



	e820_add_kernel_range();

	trim_bios_range();

#ifdef CONFIG_X86_32

	if (ppro_with_ram_bug()) {