linux-kernel - Re: [PATCH 1/1] X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts

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Date:	Fri, 18 Jan 2013 14:10:56 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>
Cc:	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org, olaf@...fle.de, apw@...onical.com,
	jasowang@...hat.com, tglx@...utronix.de,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>
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@...rosoft.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?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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