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authorYinghai Lu <yinghai@kernel.org>2009-02-22 22:14:56 -0800
committerIngo Molnar <mingo@elte.hu>2009-02-23 07:41:31 +0100
commitecda06289f8202d4c6beb235f59ea464f4a91209 (patch)
tree351d1919e4ea31dc727b6793bab2527461d06ef5 /Makefile
parentx86: refactor x86_quirks support (diff)
downloadlinux-dev-ecda06289f8202d4c6beb235f59ea464f4a91209.tar.xz
linux-dev-ecda06289f8202d4c6beb235f59ea464f4a91209.zip
x86: check mptable physptr with max_low_pfn on 32bit
Impact: fix early crash on LinuxBIOS systems Kevin O'Connor reported that Coreboot aka LinuxBIOS tries to put mptable somewhere very high, well above max_low_pfn (below which BIOSes generally put the mptable), causing a panic. The BIOS will probably be changed to be compatible with older Linus versions, but nevertheless the MP-spec does not forbid an MP-table in arbitrary system RAM, so make sure it all works even if the table is in an unexpected place. Check physptr with max_low_pfn * PAGE_SIZE. Reported-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: Stefan Reinauer <stepan@coresystems.de> Cc: coreboot@coreboot.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Makefile')
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