x86, kexec: x86_64: add identity map for pages at image->start

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Impact: Fix corner case that cannot yet occur

image->start may be outside of 0 ~ max_pfn, for example when jumping
back to original kernel from kexeced kenrel. This patch add identity
map for pages at image->start.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Huang Ying 2009-03-10 10:57:04 +08:00 • committed by H. Peter Anvin

parent fef3a7a174

commit 5359454701

1 changed files with 42 additions and 0 deletions

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arch/x86/kernel/machine_kexec_64.c

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