Arjan van de Ven wrote:
Chuck Ebbert wrote:
In-Reply-To: <[email protected]>
On 15 Jun 2006 03:45:10 +0200, Andi Kleen wrote:
Anyways I would say that if the BIOS can't get MCFG right then it's
likely not been validated on that board and shouldn't be used.
According to Petr Vandrovec:
... "What is important (and checked) is address of MMCONFIG reported
by MCFG
table... Unfortunately code does not bother with printing that
address :-(
"Another problem is that code has hardcoded that MMCONFIG area is
256MB large. Unfortunately for the code PCI specification allows any
power of two between 2MB and 256MB if vendor knows that such amount
of busses (from 2 to 128) will be sufficient for system. With
notebook it is quite possible that not full 8 bits are implemented
for MMCONFIG bus number."
So here is a patch. Unfortunately my system still fails the test
because
it doesn't reserve any part of the MMCONFIG area, but this may fix
others.
Booted on x86_64, only compiled on i386. x86_64 still remaps the max
area
(256MB) even though only 2MB is checked... but 2.6.16 had no check at
all
so it is still better.
PCI: reduce size of x86 MMCONFIG reserved area check
1. Print the address of the MMCONFIG area when the test for that area
being reserved fails.
2. Only check if the first 2MB is reserved, as that is the minimum.
Signed-off-by: Chuck Ebbert <[email protected]>
Acked-by: Arjan van de Ven <[email protected]>
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I have a system that fails to boot reporting MCFG problems.
I've applied your patch and it allowed the HP dc7600U to boot past
the MCFG problem. (I still have LVM problems - but that nothing
to do with this patch).
My shuttle P4 system also boots with your patch applied.
Barry
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