New: ata_piix ATA_HOST_IGNORE_ATA for Hyper-V also affects Virtual PC 7
https://bugzilla.kernel.org/show_bug.cgi?id=52821
Summary: ata_piix ATA_HOST_IGNORE_ATA for Hyper-V also affects
Virtual PC 7
Product: IO/Storage
Version: 2.5
Kernel Version: 3.4+
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: IDE
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
[PATCH 2/2] ata_piix: defer disks to the Hyper-V drivers by default Sat, 14 Apr 2012 16:53:16 +0100
https://lkml.org/lkml/2012/4/14/136
This patch apparently also affects Virtual PC 7.0.3 for Mac, with the result that only the emulated CD/DVD drive is visible to the system due to a missing paravirtualised
driver for the ATA device. An installation of Linux (with a kernel 3.4 and newer) in the emulated environment of VPC7 is therefor impossible.
The problem seems to be that VPC7 also provides DMI 2.3, which also contains the strings "Microsoft Corporation" and "Virtual Machine" -- just like Hyper-V.
VPC6 (Connectix Virtual PC 6.0) is not affected. (UNCONFIRMED, but 99% sure:
there cannot be "Microsoft Corporation" in it, because it was from Connectix!)
I don’t know how, but piix_ignore_devices_quirk should either be more thorough in identifying Hyper-V or it should confirm that it is not running inside Virtual PC.
I would be happy to help with inside data, like a DMI dump or anything, but you’d have to tell me exactly what to do.
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[Bug 52821] ata_piix ATA_HOST_IGNORE_ATA for Hyper-V also affects Virtual PC 7
https://bugzilla.kernel.org/show_bug.cgi?id=52821
--- Comment #1 from Andreas <[email protected]> 2013-01-19 00:35:41 --- I’ve just found that the kernel parameter ata_piix.prefer_ms_hyperv=0 works, but it is a very inconvenient way to work around this problem.
On the other hand, who is still using PowerPC-based Macs with Microsoft Virtual PC 7.0 and with modern Linux distributions?
As long as this parameter to disable the Hyper-V patch is there, at least it does work with a little extra work.
Still, if there is a way to cleanly identify Hyper-V but not Virtual PC 7, this would be great!
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[Bug 52821] ata_piix ATA_HOST_IGNORE_ATA for Hyper-V also affects Virtual PC 7
In reply to [email protected]https://bugzilla.kernel.org/show_bug.cgi?id=52821
Andreas <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |PATCH_ALREADY_AVAILABLE--- Comment #2 from Andreas <[email protected]> 2013-01-30 22:19:21 --- First appearance:
https://bugzilla.novell.com/show_bug.cgi?id=737532
Patch:
https://lkml.org/lkml/2012/9/18/306
Since I discovered the bug in a recent version of a bootable ISO, I assume a lot of recent distros are still affected.
Anyway, future releases should be fixed. Thanks.
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