Re: [Xen-devel] pv_ops: 2.6.24.3 - no vm86_info: BAD

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ian Campbell wrote:
> If I remember correctly this was due to the generic parts of the kernel
> trying to use sysenter because the hypervisor claimed to support it in
> 32on64 mode (by setting SEP in cpuid). However the Xen kernel side code
> wasn't present to support it.
>   
Yep, that's right.

> You can try booting with "nosep" on your command line or grabbing the
> git changeset d40e705903397445c6861a0a56c23e5b2e8f9b9a (which I thought
> had been put forward for the stable kernel but I don't see it there
> now).
>   
Yes, I should make sure that gets pushed out, along with the other bugfix.

Booting with "nosep" is a good workaround for the meantime.

> Lastly you could also try b8228d191b5ff7e37525846d187807d162e30464 from
> the x86.git#testing branch which actually implements sysenter support, I
> don't know which other changesets that one depends on though.
>   
I think its fairly independent of everything else.

   J

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