Re: [Xen-devel] Regression in PCI pass-through from qemu-xen changeset "Fix hvm guest cirrus_vga hvm s3 resume failure"

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Simon Horman writes ("[Xen-devel] Regression in PCI pass-through from qemu-xen 
changeset "Fix hvm guest cirrus_vga hvm s3 resume failure""):
> Apologies if this has been reported elsewhere.

Not that I've seen.

> Changeset "Fix hvm guest cirrus_vga hvm s3 resume failure"
> (08251d35eafe5bafff42d226ccd56277014b16e9) in qemu-xen-unstable.git
> appears to cause a regression. This changeset was applied
> between the xen-3.4.0-rc2 and xen-3.4.0-rc3 tags of qemu-xen-unstable.git.

You've definitely isolated it to this changeset ?

The symptoms you describe are very odd and don't seem to correspond
meaningfully to anything in the changeset.  The changeset does two
things:

 * Removes a memset to 0xff of the VGA screen memory.
 * Moves forward vga_bios_init which just initialises a bunch
   of the cirrus_vga registers, to put it before graphic_console_init.

Ian.

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