linux-kernel - RE: 0xB16B00B5? Really? (was Re: Move hyperv out of the drivers/staging/ directory)

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Message-ID: <426367E2313C2449837CD2DE46E7EAF9235474DD@SN2PRD0310MB382.namprd03.prod.outlook.com>
Date:	Thu, 19 Jul 2012 15:53:12 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	Paolo Bonzini <pbonzini@...hat.com>,
	"Greg KH (gregkh@...uxfoundation.org)" <gregkh@...uxfoundation.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>
Subject: RE: 0xB16B00B5? Really? (was Re: Move hyperv out of the
 drivers/staging/ directory)



> -----Original Message-----
> From: Borislav Petkov [mailto:bp@...en8.de]
> Sent: Thursday, July 19, 2012 11:30 AM
> To: KY Srinivasan
> Cc: Paolo Bonzini; Greg KH (gregkh@...uxfoundation.org);
> devel@...uxdriverproject.org; linux-kernel@...r.kernel.org;
> virtualization@...ts.osdl.org
> Subject: Re: 0xB16B00B5? Really? (was Re: Move hyperv out of the
> drivers/staging/ directory)
> 
> On Thu, Jul 19, 2012 at 02:11:47AM +0000, KY Srinivasan wrote:
> > As I noted earlier, this is just a guest ID that needs to be
> > registered with the hypervisor. Thanks for reporting this issue and
> > on behalf of Microsoft, I would like to apologize for this offensive
> > string. I have submitted a patch to fix this issue.
> 
> Ok, quick question:
> 
> http://msdn.microsoft.com/en-
> us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
> 
> says that that guest ID encodes a bunch of version numbers and IDs
> pertaining to the guest OS. And in that case, I would've thought
> you'd encode kernel versions or whatever like it is done with
> LINUX_VERSION_CODE, for example.
> 
> How does this define fit with that scheme or was it chosen completely
> arbitrarily?

From what I know, this constant was chosen I think, completely arbitrarily.
Currently, the hypervisor does not interpret this, however the host partition
can retrieve it. 

Regards,

K. Y