linux-kernel - Re: [PATCH v3 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK

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Message-ID: <alpine.DEB.2.02.1601251505530.9687@kaball.uk.xensource.com>
Date:	Mon, 25 Jan 2016 15:06:05 +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 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA
 ABI from Xen

On Sat, 23 Jan 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@...aro.org>
> 
> Sync the changes of HVM_PARAM_CALLBACK_VIA ABI introduced by
> Xen commit <ca5c54b6ff05> (public/hvm: export the HVM_PARAM_CALLBACK_VIA
> ABI in the API).
> 
> Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>

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


>  include/xen/interface/hvm/params.h | 27 +++++++++++++++++++++------
>  1 file changed, 21 insertions(+), 6 deletions(-)
> 
> diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
> index a6c7991..70ad208 100644
> --- a/include/xen/interface/hvm/params.h
> +++ b/include/xen/interface/hvm/params.h
> @@ -27,16 +27,31 @@
>   * Parameter space for HVMOP_{set,get}_param.
>   */
>  
> +#define HVM_PARAM_CALLBACK_IRQ 0
>  /*
>   * How should CPU0 event-channel notifications be delivered?
> - * val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt).
> - * val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows:
> - *                  Domain = val[47:32], Bus  = val[31:16],
> - *                  DevFn  = val[15: 8], IntX = val[ 1: 0]
> - * val[63:56] == 2: val[7:0] is a vector number.
> + *
>   * If val == 0 then CPU0 event-channel notifications are not delivered.
> + * If val != 0, val[63:56] encodes the type, as follows:
> + */
> +
> +#define HVM_PARAM_CALLBACK_TYPE_GSI      0
> +/*
> + * val[55:0] is a delivery GSI.  GSI 0 cannot be used, as it aliases val == 0,
> + * and disables all notifications.
> + */
> +
> +#define HVM_PARAM_CALLBACK_TYPE_PCI_INTX 1
> +/*
> + * val[55:0] is a delivery PCI INTx line:
> + * Domain = val[47:32], Bus = val[31:16] DevFn = val[15:8], IntX = val[1:0]
> + */
> +
> +#define HVM_PARAM_CALLBACK_TYPE_VECTOR   2
> +/*
> + * val[7:0] is a vector number.  Check for XENFEAT_hvm_callback_vector to know
> + * if this delivery method is available.
>   */
> -#define HVM_PARAM_CALLBACK_IRQ 0
>  
>  #define HVM_PARAM_STORE_PFN    1
>  #define HVM_PARAM_STORE_EVTCHN 2
> -- 
> 2.0.4
> 
>