Commit-ID: b422a3091748c38b68052e8ba021652590b1f25c Gitweb: http://git.kernel.org/tip/b422a3091748c38b68052e8ba021652590b1f25c Author: Yinghai Lu <ying...@kernel.org> AuthorDate: Thu, 24 Jan 2013 12:19:45 -0800 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Tue, 29 Jan 2013 15:12:24 -0800
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$yyM is used without exactmap. Need to remove reserved range at first before we add E820_RAM range, otherwise added E820_RAM range will be ignored. Signed-off-by: Yinghai Lu <ying...@kernel.org> Link: http://lkml.kernel.org/r/1359058816-7615-5-git-send-email-ying...@kernel.org Cc: Jacob Shin <jacob.s...@amd.com> Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/kernel/setup.c | 36 ++++++++++++++++++++++-------------- 1 file changed, 22 insertions(+), 14 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 2681937..5552d04 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -702,6 +702,27 @@ static void __init trim_bios_range(void) sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); } +/* called before trim_bios_range() to spare extra sanitize */ +static void __init e820_add_kernel_range(void) +{ + u64 start = __pa_symbol(_text); + u64 size = __pa_symbol(_end) - start; + + /* + * Complain if .text .data and .bss are not marked as E820_RAM and + * attempt to fix it by adding the range. We may have a confused BIOS, + * or the user may have used memmap=exactmap or memmap=xxM$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()) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
