linux-kernel - Re: ACPI error when mapping a 2GB BAR w/ 4GB of RAM

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Message-ID: <20100917200428.GD19949@x200.localdomain>
Date:	Fri, 17 Sep 2010 13:04:28 -0700
From:	Chris Wright <chrisw@...hat.com>
To:	Cam Macdonell <cam@...ualberta.ca>
Cc:	"qemu-devel@...gnu.org Developers" <qemu-devel@...gnu.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Chris Wright <chrisw@...hat.com>
Subject: Re: ACPI error when mapping a 2GB BAR w/ 4GB of RAM

* Cam Macdonell (cam@...ualberta.ca) wrote:
> After fixing the resource_size_t return value with
> pci_resource_alignment, I see one other strange behaviour only when
> using 4GB of RAM and a 2GB BAR.  I haven't found any other combination
> of RAM/BAR size that triggers this bug.  I am using 2.6.36-rc3.
> 
> ACPI Error: The DSDT has been corrupted or replaced - old, new headers
> below (20100702/tbutils-372)
> ACPI: DSDT (null) 01F15 (v01   BXPC   BXDSDT 00000001 INTL 20090123)
> ACPI:      (null) 00000 (v00                 00000000      00000000)
> ACPI Error: Please send DMI info to linux-acpi@...r.kernel.org
> If system does not work as expected, please boot with acpi=copy_dsdt
> (20100702/tbutils-378)
> ACPI: PCI Interrupt Link [LNKC] disabled and referenced, BIOS bug
> ACPI Exception: AE_AML_INVALID_RESOURCE_TYPE, Evaluating _CRS
> (20100702/pci_link-283)
> ACPI: Unable to set IRQ for PCI Interrupt Link [LNKC]. Try pci=noacpi
> or acpi=off
> virtio-pci 0000:00:03.0: PCI INT A: no GSI - using ISA IRQ 11
> Non-volatile memory driver v1.3
> Linux agpgart interface v0.103
> Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

IIRC,  the pci hole is only 1.5G in the BIOS, can you verify that
seabios is doing the right thing?

thanks,
-chris
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