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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2010-10-13 16:34:15 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-14 09:06:49 +0200 |
| commit | 67e87f0a1c5cbc750f81ebf6a128e8ff6f4376cc (patch) | |
| tree | 566e2fdaf0fdec91bc1fd21141b6052bf4837fba /kernel | |
| parent | fef5ba797991f9335bcfc295942b684f9bf613a1 (diff) | |
| download | op-kernel-dev-67e87f0a1c5cbc750f81ebf6a128e8ff6f4376cc.zip op-kernel-dev-67e87f0a1c5cbc750f81ebf6a128e8ff6f4376cc.tar.gz | |
x86-64: Only set max_pfn_mapped to 512 MiB if we enter via head_64.S
head_64.S maps up to 512 MiB, but that is not necessarity true for
other entry paths, such as Xen.
Thus, co-locate the setting of max_pfn_mapped with the code to
actually set up the page tables in head_64.S. The 32-bit code is
already so co-located. (The Xen code already sets max_pfn_mapped
correctly for its own use case.)
-v2:
Yinghai fixed the following bug in this patch:
|
| max_pfn_mapped is in .bss section, so we need to set that
| after bss get cleared. Without that we crash on bootup.
|
| That is safe because Xen does not call x86_64_start_kernel().
|
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Fixed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
LKML-Reference: <4CB6AB24.9020504@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions
