> -Original Message-
> From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
> Srinivasan
> Sent: Thursday, April 18, 2013 9:23 AM
> To: Michael S. Tsirkin
> Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
> x...@kernel.org;
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Thursday, April 18, 2013 3:48 AM
> To: KY Srinivasan
> Cc: Jan Beulich; o...@aepfle.de; b...@alien8.de; a...@canonical.com;
> x...@kernel.org; t...@linutronix.de; de...@linuxdriverproject.org;
>
On Wed, Apr 17, 2013 at 04:28:36PM +, KY Srinivasan wrote:
>
>
> > -Original Message-
> > From: Jan Beulich [mailto:jbeul...@suse.com]
> > Sent: Wednesday, April 17, 2013 11:51 AM
> > To: KY Srinivasan; Michael S. Tsirkin
> > Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com;
On Wed, Apr 17, 2013 at 04:28:36PM +, KY Srinivasan wrote:
-Original Message-
From: Jan Beulich [mailto:jbeul...@suse.com]
Sent: Wednesday, April 17, 2013 11:51 AM
To: KY Srinivasan; Michael S. Tsirkin
Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com;
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Thursday, April 18, 2013 3:48 AM
To: KY Srinivasan
Cc: Jan Beulich; o...@aepfle.de; b...@alien8.de; a...@canonical.com;
x...@kernel.org; t...@linutronix.de; de...@linuxdriverproject.org;
-Original Message-
From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
Srinivasan
Sent: Thursday, April 18, 2013 9:23 AM
To: Michael S. Tsirkin
Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
x...@kernel.org; linux-kernel@vger.kernel.org;
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Wednesday, April 17, 2013 11:51 AM
> To: KY Srinivasan; Michael S. Tsirkin
> Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
> t...@linutronix.de; de...@linuxdriverproject.org;
>>> On 17.04.13 at 17:31, KY Srinivasan wrote:
> If Xen were to change where it would not unconditionally emulate Hyper-V, I
> would not be opposed to taking
> this check out.
But it doesn't do this unconditionally, only upon admin request.
Jan
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To unsubscribe from this list: send the line
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Wednesday, April 17, 2013 9:49 AM
> To: KY Srinivasan
> Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
>
On 04/17/2013 07:09 AM, Jan Beulich wrote:
>
> Iirc it was/is XenServer which enable Hyper-V emulation for all HVM
> guests, which clearly is the wrong thing. I was personally also not
> really in agreement with the override in the kernel, but it was
> decided to do it that way at that point in
On Wed, Apr 17, 2013 at 02:34:57PM +, KY Srinivasan wrote:
>
>
> > -Original Message-
> > From: Michael S. Tsirkin [mailto:m...@redhat.com]
> > Sent: Wednesday, April 17, 2013 9:25 AM
> > To: KY Srinivasan
> > Cc: x...@kernel.org; gre...@linuxfoundation.org;
> >
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Wednesday, April 17, 2013 9:25 AM
> To: KY Srinivasan
> Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
>
On Wed, Apr 17, 2013 at 02:12:12PM +, KY Srinivasan wrote:
>
>
> > -Original Message-
> > From: Michael S. Tsirkin [mailto:m...@redhat.com]
> > Sent: Wednesday, April 17, 2013 8:49 AM
> > To: KY Srinivasan
> > Cc: x...@kernel.org; gre...@linuxfoundation.org;
> >
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Wednesday, April 17, 2013 8:49 AM
> To: KY Srinivasan
> Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
>
On Wed, Apr 17, 2013 at 04:01:02PM +0300, Michael S. Tsirkin wrote:
> On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
> > >>> On 17.04.13 at 15:20, KY Srinivasan wrote:
> > > If I recall correctly, the issue here was that Xen was enabling Hyper-V
> > > emulation un-conditionally
>>> On 17.04.13 at 15:01, "Michael S. Tsirkin" wrote:
> On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
>> >>> On 17.04.13 at 15:20, KY Srinivasan wrote:
>> > If I recall correctly, the issue here was that Xen was enabling Hyper-V
>> > emulation un-conditionally even for Linux
Hi!
This is _positive_ variant of possible future,
but on _practic_ very often we need prevent _negative_ variant of possible
future
I don't really know what this means.
On practic: this means, that need test with KVM "Hyper-V emulation" not only
Windows guest, but _all_ Linux guest
On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
> >>> On 17.04.13 at 15:20, KY Srinivasan wrote:
> > If I recall correctly, the issue here was that Xen was enabling Hyper-V
> > emulation un-conditionally even for Linux guests.
>
> To make this a little more precise - Xen is doing
>>> On 17.04.13 at 15:20, KY Srinivasan wrote:
> If I recall correctly, the issue here was that Xen was enabling Hyper-V
> emulation un-conditionally even for Linux guests.
To make this a little more precise - Xen is doing so only when the
guest config tells it to.
Jan
--
To unsubscribe from
Hi!
2013/4/17 Jan Beulich
>>> On 17.04.13 at 12:16, "Michael S. Tsirkin" wrote:
> If the hypervisor says it's Hyper-V, that's because it wants
> guests to use Hyper-V. I don't see why is guest second-guessing
> this a good idea.
There are two reasons here: For one, when the hypervisor is not
On Wed, Apr 17, 2013 at 01:20:58PM +, KY Srinivasan wrote:
>
>
> > -Original Message-
> > From: Michael S. Tsirkin [mailto:m...@redhat.com]
> > Sent: Wednesday, April 17, 2013 3:06 AM
> > To: KY Srinivasan
> > Cc: x...@kernel.org; gre...@linuxfoundation.org;
> >
On Wed, Apr 17, 2013 at 04:03:08PM +0300, Victor M. wrote:
> Hi!
>
> 2013/4/17 Jan Beulich
>
> >>> On 17.04.13 at 12:16, "Michael S. Tsirkin" wrote:
> > If the hypervisor says it's Hyper-V, that's because it wants
> > guests to use Hyper-V. I don't see why is guest second-guessing
>
> -Original Message-
> From: Michael S. Tsirkin [mailto:m...@redhat.com]
> Sent: Wednesday, April 17, 2013 3:06 AM
> To: KY Srinivasan
> Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
> de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
>
Hi!
Short:
>> When KVM runs in Hyper-V emulation mode it expects to get Hyper-V hypercalls.
>> Mixing KVM hypercalls and Hyper-V requires some tricks. It
VVM>> KVM "Hyper-V emulation" -- this can be related "Linux on Hyper-V" ?
It's not related.
Are You shue?
Xen-team _think_ too what
On Sun, Feb 03, 2013 at 05:22:38PM -0800, K. Y. Srinivasan wrote:
> Xen emulates Hyper-V to host enlightened Windows. Looks like this
> emulation may be turned on by default even for Linux guests. Check and
> fail Hyper-V detection if we are on Xen.
>
> Signed-off-by: K. Y. Srinivasan
I'm very
On Sun, Feb 03, 2013 at 05:22:38PM -0800, K. Y. Srinivasan wrote:
Xen emulates Hyper-V to host enlightened Windows. Looks like this
emulation may be turned on by default even for Linux guests. Check and
fail Hyper-V detection if we are on Xen.
Signed-off-by: K. Y. Srinivasan
Hi!
Short:
When KVM runs in Hyper-V emulation mode it expects to get Hyper-V hypercalls.
Mixing KVM hypercalls and Hyper-V requires some tricks. It
VVM KVM Hyper-V emulation -- this can be related Linux on Hyper-V ?
It's not related.
Are You shue?
Xen-team _think_ too what is not
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 3:06 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
On Wed, Apr 17, 2013 at 04:03:08PM +0300, Victor M. wrote:
Hi!
2013/4/17 Jan Beulich
On 17.04.13 at 12:16, Michael S. Tsirkin wrote:
If the hypervisor says it's Hyper-V, that's because it wants
guests to use Hyper-V. I don't see why is guest second-guessing
this a
On Wed, Apr 17, 2013 at 01:20:58PM +, KY Srinivasan wrote:
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 3:06 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org;
linux-kernel@vger.kernel.org;
Hi!
2013/4/17 Jan Beulich
On 17.04.13 at 12:16, Michael S. Tsirkin wrote:
If the hypervisor says it's Hyper-V, that's because it wants
guests to use Hyper-V. I don't see why is guest second-guessing
this a good idea.
There are two reasons here: For one, when the hypervisor is not
On 17.04.13 at 15:20, KY Srinivasan k...@microsoft.com wrote:
If I recall correctly, the issue here was that Xen was enabling Hyper-V
emulation un-conditionally even for Linux guests.
To make this a little more precise - Xen is doing so only when the
guest config tells it to.
Jan
--
To
On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
On 17.04.13 at 15:20, KY Srinivasan k...@microsoft.com wrote:
If I recall correctly, the issue here was that Xen was enabling Hyper-V
emulation un-conditionally even for Linux guests.
To make this a little more precise - Xen is
Hi!
This is _positive_ variant of possible future,
but on _practic_ very often we need prevent _negative_ variant of possible
future
I don't really know what this means.
On practic: this means, that need test with KVM Hyper-V emulation not only
Windows guest, but _all_ Linux guest
_all_
On 17.04.13 at 15:01, Michael S. Tsirkin m...@redhat.com wrote:
On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
On 17.04.13 at 15:20, KY Srinivasan k...@microsoft.com wrote:
If I recall correctly, the issue here was that Xen was enabling Hyper-V
emulation un-conditionally
On Wed, Apr 17, 2013 at 04:01:02PM +0300, Michael S. Tsirkin wrote:
On Wed, Apr 17, 2013 at 02:52:42PM +0100, Jan Beulich wrote:
On 17.04.13 at 15:20, KY Srinivasan k...@microsoft.com wrote:
If I recall correctly, the issue here was that Xen was enabling Hyper-V
emulation
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 8:49 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
On Wed, Apr 17, 2013 at 02:12:12PM +, KY Srinivasan wrote:
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 8:49 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org;
linux-kernel@vger.kernel.org;
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 9:25 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
On Wed, Apr 17, 2013 at 02:34:57PM +, KY Srinivasan wrote:
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 9:25 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org;
linux-kernel@vger.kernel.org;
On 04/17/2013 07:09 AM, Jan Beulich wrote:
Iirc it was/is XenServer which enable Hyper-V emulation for all HVM
guests, which clearly is the wrong thing. I was personally also not
really in agreement with the override in the kernel, but it was
decided to do it that way at that point in time.
-Original Message-
From: Michael S. Tsirkin [mailto:m...@redhat.com]
Sent: Wednesday, April 17, 2013 9:49 AM
To: KY Srinivasan
Cc: x...@kernel.org; gre...@linuxfoundation.org; linux-kernel@vger.kernel.org;
de...@linuxdriverproject.org; o...@aepfle.de; a...@canonical.com;
On 17.04.13 at 17:31, KY Srinivasan k...@microsoft.com wrote:
If Xen were to change where it would not unconditionally emulate Hyper-V, I
would not be opposed to taking
this check out.
But it doesn't do this unconditionally, only upon admin request.
Jan
--
To unsubscribe from this list:
-Original Message-
From: Jan Beulich [mailto:jbeul...@suse.com]
Sent: Wednesday, April 17, 2013 11:51 AM
To: KY Srinivasan; Michael S. Tsirkin
Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
t...@linutronix.de; de...@linuxdriverproject.org;
> -Original Message-
> From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
> Srinivasan
> Sent: Friday, February 01, 2013 10:11 AM
> To: Stefano Stabellini; H. Peter Anvin
> Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
> x...@kernel.org;
> -Original Message-
> From: Stefano Stabellini [mailto:stefano.stabell...@eu.citrix.com]
> Sent: Friday, February 01, 2013 8:20 AM
> To: H. Peter Anvin
> Cc: Jan Beulich; KY Srinivasan; o...@aepfle.de; b...@alien8.de;
> a...@canonical.com; x...@kernel.org; t...@linutronix.de;
>
On Thu, 31 Jan 2013, H. Peter Anvin wrote:
> On 01/30/2013 12:53 AM, Jan Beulich wrote:
> >
> > I'm not convinced that's the right approach - any hypervisor
> > could do similar emulation, and hence you either want to make
> > sure you run on Hyper-V (by excluding all others), or you
> > tolerate
On Thu, 31 Jan 2013, H. Peter Anvin wrote:
On 01/30/2013 12:53 AM, Jan Beulich wrote:
I'm not convinced that's the right approach - any hypervisor
could do similar emulation, and hence you either want to make
sure you run on Hyper-V (by excluding all others), or you
tolerate using the
-Original Message-
From: Stefano Stabellini [mailto:stefano.stabell...@eu.citrix.com]
Sent: Friday, February 01, 2013 8:20 AM
To: H. Peter Anvin
Cc: Jan Beulich; KY Srinivasan; o...@aepfle.de; b...@alien8.de;
a...@canonical.com; x...@kernel.org; t...@linutronix.de;
-Original Message-
From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
Srinivasan
Sent: Friday, February 01, 2013 10:11 AM
To: Stefano Stabellini; H. Peter Anvin
Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
x...@kernel.org;
On 01/30/2013 12:53 AM, Jan Beulich wrote:
>
> I'm not convinced that's the right approach - any hypervisor
> could do similar emulation, and hence you either want to make
> sure you run on Hyper-V (by excluding all others), or you
> tolerate using the emulation (which may require syncing up with
On 01/31/2013 08:45 AM, Jan Beulich wrote:
On 31.01.13 at 16:53, KY Srinivasan wrote:
Are there any published standards in terms of how the CPUID space should be
populated in the range from 0x4000 to 0x4001. Specifically, unless
I recall having seen this range being marked as
>>> On 31.01.13 at 16:53, KY Srinivasan wrote:
> Are there any published standards in terms of how the CPUID space should be
> populated in the range from 0x4000 to 0x4001. Specifically, unless
I recall having seen this range being marked as reserved for
hypervisor use somewhere, but I
> -Original Message-
> From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
> Srinivasan
> Sent: Thursday, January 31, 2013 9:46 AM
> To: Jan Beulich
> Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
> x...@kernel.org;
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Thursday, January 31, 2013 2:38 AM
> To: KY Srinivasan
> Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
> t...@linutronix.de; de...@linuxdriverproject.org; gre...@linuxfoundation.org;
>
-Original Message-
From: Jan Beulich [mailto:jbeul...@suse.com]
Sent: Thursday, January 31, 2013 2:38 AM
To: KY Srinivasan
Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
t...@linutronix.de; de...@linuxdriverproject.org; gre...@linuxfoundation.org;
-Original Message-
From: devel [mailto:devel-boun...@linuxdriverproject.org] On Behalf Of KY
Srinivasan
Sent: Thursday, January 31, 2013 9:46 AM
To: Jan Beulich
Cc: o...@aepfle.de; gre...@linuxfoundation.org; jasow...@redhat.com;
x...@kernel.org; linux-kernel@vger.kernel.org;
On 31.01.13 at 16:53, KY Srinivasan k...@microsoft.com wrote:
Are there any published standards in terms of how the CPUID space should be
populated in the range from 0x4000 to 0x4001. Specifically, unless
I recall having seen this range being marked as reserved for
hypervisor use
On 01/31/2013 08:45 AM, Jan Beulich wrote:
On 31.01.13 at 16:53, KY Srinivasan k...@microsoft.com wrote:
Are there any published standards in terms of how the CPUID space should be
populated in the range from 0x4000 to 0x4001. Specifically, unless
I recall having seen this range being
On 01/30/2013 12:53 AM, Jan Beulich wrote:
I'm not convinced that's the right approach - any hypervisor
could do similar emulation, and hence you either want to make
sure you run on Hyper-V (by excluding all others), or you
tolerate using the emulation (which may require syncing up with
the
>>> On 30.01.13 at 19:12, KY Srinivasan wrote:
> Presumably, Hyper-V emulation is only to run enlightened Windows. The issue
> with
> Xen is not that it emulates Hyper-V, but this emulation is turned on while
> running Linux.
> That is the reason I chose to check for Xen. Would you prefer a DMI
On 01/30/2013 10:12 AM, KY Srinivasan wrote:
I'm not convinced that's the right approach - any hypervisor
could do similar emulation, and hence you either want to make
sure you run on Hyper-V (by excluding all others), or you
tolerate using the emulation (which may require syncing up with
the
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: Wednesday, January 30, 2013 3:53 AM
> To: KY Srinivasan
> Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
> t...@linutronix.de; de...@linuxdriverproject.org; gre...@linuxfoundation.org;
>
>>> On 30.01.13 at 01:51, "K. Y. Srinivasan" wrote:
> Xen emulates Hyper-V to host enlightened Windows. Looks like this
> emulation may be turned on by default even for Linux guests. Check and
> fail Hyper-V detection if we are on Xen.
>
> Signed-off-by: K. Y. Srinivasan
> ---
>
On 30.01.13 at 01:51, K. Y. Srinivasan k...@microsoft.com wrote:
Xen emulates Hyper-V to host enlightened Windows. Looks like this
emulation may be turned on by default even for Linux guests. Check and
fail Hyper-V detection if we are on Xen.
Signed-off-by: K. Y. Srinivasan
-Original Message-
From: Jan Beulich [mailto:jbeul...@suse.com]
Sent: Wednesday, January 30, 2013 3:53 AM
To: KY Srinivasan
Cc: o...@aepfle.de; b...@alien8.de; a...@canonical.com; x...@kernel.org;
t...@linutronix.de; de...@linuxdriverproject.org; gre...@linuxfoundation.org;
On 01/30/2013 10:12 AM, KY Srinivasan wrote:
I'm not convinced that's the right approach - any hypervisor
could do similar emulation, and hence you either want to make
sure you run on Hyper-V (by excluding all others), or you
tolerate using the emulation (which may require syncing up with
the
On 30.01.13 at 19:12, KY Srinivasan k...@microsoft.com wrote:
Presumably, Hyper-V emulation is only to run enlightened Windows. The issue
with
Xen is not that it emulates Hyper-V, but this emulation is turned on while
running Linux.
That is the reason I chose to check for Xen. Would you
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