[PATCH] x86-64: 64bit ACPI wakeup trampoline

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o Moved wakeup_level4_pgt into the wakeup routine so we can
  run the kernel above 4G.

o Now we first go to 64bit mode and continue to run from trampoline and
  then then start accessing kernel symbols and restore processor context.
  This enables us to resume even in relocatable kernel context when
  kernel might not be loaded at physical addr it has been compiled for.

o Removed the need for modifying any existing kernel page table.

o Increased the size of the wakeup routine to 8K. This is required as
  wake page tables are on trampoline itself and they got to be at 4K
  boundary, hence one page is not sufficient.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

...

This commit is contained in:

Vivek Goyal 2007-05-02 19:27:07 +02:00 • committed by Andi Kleen

parent 275f55170e

commit d8e1baf10d

3 changed files with 41 additions and 51 deletions

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24

arch/x86_64/kernel/acpi/sleep.c

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59

arch/x86_64/kernel/acpi/wakeup.S

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9

arch/x86_64/kernel/head.S

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