x86-32, mm: Add an initial page table for core bootstrapping

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This patch adds an initial page table with low mappings used exclusively
for booting APs/resuming after ACPI suspend/machine restart. After this,
there's no need to add low mappings to swapper_pg_dir and zap them later
or create own swsusp PGD page solely for ACPI sleep needs - we have
initial_page_table for that.

Signed-off-by: Borislav Petkov <bp@alien8.de>
LKML-Reference: <20101020070526.GA9588@liondog.tnic>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

...

This commit is contained in:

Borislav Petkov 2010-08-28 15:58:33 +02:00 • committed by H. Peter Anvin

parent d25e6b0b32

commit b40827fa72

11 changed files with 56 additions and 119 deletions

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2

arch/x86/include/asm/pgtable_32.h

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2

arch/x86/include/asm/tlbflush.h

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3

arch/x86/include/asm/trampoline.h

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7

arch/x86/kernel/acpi/sleep.c

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1

arch/x86/kernel/head32.c

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55

arch/x86/kernel/head_32.S

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10

arch/x86/kernel/reboot.c

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18

arch/x86/kernel/setup.c

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arch/x86/kernel/smpboot.c

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16

arch/x86/kernel/trampoline.c

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45

arch/x86/mm/init_32.c

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