Re: [Qemu-devel] [PATCH v4 3/5] acpi: pc: add fw_cfg device node to ssdt

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Oct 13, 2015 at 07:43:00PM -0300, Eduardo Habkost wrote:
> On Wed, Oct 14, 2015 at 12:18:10AM +0300, Michael S. Tsirkin wrote:
> > On Tue, Oct 13, 2015 at 04:10:03PM -0300, Eduardo Habkost wrote:
> > > One of the things that may break if guest-visible bits of the machine
> > > change is Windows license activation, but the rules Windows use to
> > > trigger reactivation aren't very clear.
> > 
> > They are easy to find on the internet.
> 
> I couldn't find them[1]. If you have a pointer to a clear description of
> the rules for all Windows versions, I would love to see it.


The detailed info is not hard to find:
http://en.wikipedia.org/wiki/Microsoft_Product_Activation
links to:
http://technet.microsoft.com/en-us/library/bb457054.aspx


1
Display Adapter
00010 (5)
2
SCSI Adapter
00011 (5)
3
IDE Adapter
0011 (4)
4
Network Adapter MAC Address
1001011000 (10)
5
RAM Amount Range (i.e. 0-64mb, 64-128mb, etc)
101 (3)
6
Processor Type
011 (3)
7
Processor Serial Number
000000 (6)
8
Hard Drive Device
1101100 (7)
9
Hard Drive Volume Serial Number
1001000001 (10)
10
CD—ROM / CD-RW / DVD-ROM
010111 (6)
-
"Dockable"
0 (1)
-
Hardware Hash version (version of algorithm used)
001 (3)

Also:
	Microsoft defines "substantially different" hardware differently for PCs
	that are configured to be dockable. Additionally, the network adapter is
	given a superior "weighting." If the PC is not dockable and a network
	adapter exists and is not changed, 6 or more of the other above values
	would have to change before reactivation was required. If a network
	adapter existed but is changed or never existed at all, 4 or more
	changes (including the changed network adapter if it previously existed)
	will result in a requirement to reactivate.

So it's also not hard to try it out with kvm.  Apply a patch, change
3 other things: nic mac, ram size (by a factor of >2), cpu type and boot.



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> -- 
> Ross Philipson