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Date: Mon, 25 Jan 2016 15:06:05 +0000
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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To: Shannon Zhao <zhaoshenglong@huawei.com>
CC: <linux-arm-kernel@lists.infradead.org>, <ard.biesheuvel@linaro.org>,
        <mark.rutland@arm.com>, <stefano.stabellini@citrix.com>,
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        <ian.campbell@citrix.com>, <shannon.zhao@linaro.org>,
        <peter.huangpeng@huawei.com>
Subject: Re: [PATCH v3 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA
 ABI from Xen
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On Sat, 23 Jan 2016, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@linaro.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@linaro.org>

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