diff options
| author | Arjan van de Ven <arjan@linux.intel.com> | 2006-04-07 19:49:30 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-09 11:53:51 -0700 |
| commit | 946f2ee5c7312e8acac4f3ab6629e7e2d36a3646 (patch) | |
| tree | 0821a2f3f59a089b73d33f64f59331460e20355a /kernel/extable.c | |
| parent | 952223683ec989e86328c24808fdb962c4dbeb0a (diff) | |
[PATCH] i386/x86-64: Check that MCFG points to an e820 reserved area
This patch introduces a user for the e820_all_mapped function:
There have been several machines that don't have a working MMCONFIG,
often because of a buggy MCFG table in the ACPI bios. This patch adds a
simple sanity check that detects a whole bunch of these cases, and when
it detects it, linux now boots rather than crash-and-burns.
The accuracy of this detection can in principle be improved if there was
a "is this entire range in e820 with THIS attribute", but no such
function exist and the complexity needed for this is not really worth
it; this simple check already catches most cases anyway.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/extable.c')
0 files changed, 0 insertions, 0 deletions