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SubjectRE: [PATCH 1/1] X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts
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> -----Original Message-----
> From: Borislav Petkov [mailto:bp@alien8.de]
> Sent: Friday, January 18, 2013 8:11 AM
> To: KY Srinivasan
> Cc: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org;
> devel@linuxdriverproject.org; olaf@aepfle.de; apw@canonical.com;
> jasowang@redhat.com; tglx@linutronix.de; H. Peter Anvin; Ingo Molnar
> Subject: Re: [PATCH 1/1] X86: Handle Hyper-V vmbus interrupts as special
> hypervisor interrupts
>
> On Thu, Jan 17, 2013 at 04:39:37PM -0800, K. Y. Srinivasan wrote:
> >
> > Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
> > ---
> > arch/x86/include/asm/irq_vectors.h | 2 +
> > arch/x86/include/asm/mshyperv.h | 4 +++
> > arch/x86/kernel/cpu/mshyperv.c | 39
> ++++++++++++++++++++++++++++++++++++
> > arch/x86/kernel/entry_32.S | 7 ++++++
> > arch/x86/kernel/entry_64.S | 5 ++++
> > 5 files changed, 57 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/x86/include/asm/irq_vectors.h
> b/arch/x86/include/asm/irq_vectors.h
> > index 1508e51..c2ff239 100644
> > --- a/arch/x86/include/asm/irq_vectors.h
> > +++ b/arch/x86/include/asm/irq_vectors.h
> > @@ -112,6 +112,8 @@
> > /* Xen vector callback to receive events in a HVM domain */
> > #define XEN_HVM_EVTCHN_CALLBACK 0xf3
> >
> > +/* Hyper-V vector callback to receive vmbus interrupts*/
> > +#define HYPER_V_CALLBACK_VECTOR 0xf2
>
> Btw, could those hypervisor vectors be merged into one VIRT_INTR_VECTOR
> and be shared between the hypervisors? I mean, you can't have a xen and
> hyperv hypervisor running next to each other and fihgting over that
> vector, right?

You are right; we could just have one vector for this. Let me wait for other comments and
input from Xen maintainers before I make this change.

Regards,

K. Y
>
> --
> Regards/Gruss,
> Boris.
>
> Sent from a fat crate under my desk. Formatting is fine.
> --
>

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