linux-kernel - Re: [PATCH v3 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK

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Date:	Mon, 25 Jan 2016 15:08:33 +0000
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Shannon Zhao <zhaoshenglong@...wei.com>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<ard.biesheuvel@...aro.org>, <mark.rutland@....com>,
	<stefano.stabellini@...rix.com>, <david.vrabel@...rix.com>,
	<catalin.marinas@....com>, <will.deacon@....com>,
	<julien.grall@...rix.com>, <xen-devel@...ts.xen.org>,
	<devicetree@...r.kernel.org>, <linux-efi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <ian.campbell@...rix.com>,
	<shannon.zhao@...aro.org>, <peter.huangpeng@...wei.com>
Subject: Re: [PATCH v3 09/17] xen/hvm/params: Add a new delivery type for
 event-channel in HVM_PARAM_CALLBACK_IRQ

On Sat, 23 Jan 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@...aro.org>
> 
> Add a new delivery type:
> val[63:56] == 3: val[15:8] is flag: val[7:0] is a PPI.
> To the flag, bit 0 stands the interrupt mode is edge(1) or level(0) and
> bit 1 stands the interrupt polarity is active low(1) or high(0).
> 
> Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>

Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com>


>  include/xen/interface/hvm/params.h | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
> index 70ad208..5dd629f 100644
> --- a/include/xen/interface/hvm/params.h
> +++ b/include/xen/interface/hvm/params.h
> @@ -53,6 +53,15 @@
>   * if this delivery method is available.
>   */
>  
> +#define HVM_PARAM_CALLBACK_TYPE_EVENT    3
> +/*
> + * val[15:8] is flag of event-channel interrupt:
> + *  bit 0: interrupt is edge(1) or level(0) triggered
> + *  bit 1: interrupt is active low(1) or high(0)
> + * val[7:0] is PPI number used by event-channel.
> + * This is only used by ARM/ARM64.
> + */
> +
>  #define HVM_PARAM_STORE_PFN    1
>  #define HVM_PARAM_STORE_EVTCHN 2
>  
> -- 
> 2.0.4
> 
>