* what is MCFG area ?
@ 2006-06-06 23:45 Sergio Monteiro Basto
2006-06-07 4:15 ` Pavel Troller
0 siblings, 1 reply; 3+ messages in thread
From: Sergio Monteiro Basto @ 2006-06-06 23:45 UTC (permalink / raw)
To: linux-acpi
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http://lkml.org/lkml/2006/3/23/213
On my buggy computer i get
cat dmesg09 | grep "MM\|MCFG"
ACPI: MCFG (v001 A M I OEMMCFG 0x05000602 MSFT 0x00000097) @ 0x000000003ffb0410
PCI: BIOS Bug: MCFG area is not E820-reserved
PCI: Not using MMCONFIG.
PCI-DMA: Disabling IOMMU.
Should ACPI read MCFG area ?
Thanks,
--
Sérgio M. B.
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: what is MCFG area ?
2006-06-06 23:45 what is MCFG area ? Sergio Monteiro Basto
@ 2006-06-07 4:15 ` Pavel Troller
2006-06-07 13:33 ` Sergio Monteiro Basto
0 siblings, 1 reply; 3+ messages in thread
From: Pavel Troller @ 2006-06-07 4:15 UTC (permalink / raw)
To: Sergio Monteiro Basto; +Cc: linux-acpi
> On my buggy computer i get
> cat dmesg09 | grep "MM\|MCFG"
> ACPI: MCFG (v001 A M I OEMMCFG 0x05000602 MSFT 0x00000097) @ 0x000000003ffb0410
> PCI: BIOS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG.
> PCI-DMA: Disabling IOMMU.
I'm getting exactly the same messages, just the numbers in the MCFG line are
different:
root@arcus:~# dmesg | grep "MM\|MCFG"
ACPI: MCFG (v001 A M I OEMMCFG 0x11000524 MSFT 0x00000097) @ 0x000000003f7d03f0
PCI: BIOS Bug: MCFG area is not E820-reserved
PCI: Not using MMCONFIG.
PCI-DMA: Disabling IOMMU.
It's on a MSI motherboard with Intel 945 chipset (MS-7210). The machine
otherwise works very well.
The "Disabling IOMMU" message I'm getting also on another, Nvidia NF4/Opteron
based board, without this MCFG bug. I think it's unrelated and because Linux
properly detected the BIOS bug and probably fixed it, I think the MCFG message
is harmless.
With regards, Pavel Troller
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: what is MCFG area ?
2006-06-07 4:15 ` Pavel Troller
@ 2006-06-07 13:33 ` Sergio Monteiro Basto
0 siblings, 0 replies; 3+ messages in thread
From: Sergio Monteiro Basto @ 2006-06-07 13:33 UTC (permalink / raw)
To: Pavel Troller; +Cc: linux-acpi
On Wed, 2006-06-07 at 06:15 +0200, Pavel Troller wrote:
> > On my buggy computer i get
> > cat dmesg09 | grep "MM\|MCFG"
> > ACPI: MCFG (v001 A M I OEMMCFG 0x05000602 MSFT 0x00000097) @ 0x000000003ffb0410
> > PCI: BIOS Bug: MCFG area is not E820-reserved
> > PCI: Not using MMCONFIG.
> > PCI-DMA: Disabling IOMMU.
>
> I'm getting exactly the same messages, just the numbers in the MCFG line are
> different:
> root@arcus:~# dmesg | grep "MM\|MCFG"
> ACPI: MCFG (v001 A M I OEMMCFG 0x11000524 MSFT 0x00000097) @ 0x000000003f7d03f0
> PCI: BIOS Bug: MCFG area is not E820-reserved
> PCI: Not using MMCONFIG.
> PCI-DMA: Disabling IOMMU.
>
> It's on a MSI motherboard with Intel 945 chipset (MS-7210). The machine
> otherwise works very well.
> The "Disabling IOMMU" message I'm getting also on another, Nvidia NF4/Opteron
> based board, without this MCFG bug. I think it's unrelated and because Linux
> properly detected the BIOS bug and probably fixed it, I think the MCFG message
> is harmless.
> With regards, Pavel Troller
yes, IOMMU is a different thing some AGPs have it. But I don't what is
too.
Sérgio M. B.
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2006-06-07 4:15 ` Pavel Troller
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