linux-kernel - Re: [PATCH v2 01/10] KVM: add commentary for kvm_debug_exit

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Message-ID: <20150413105744.GL6186@cbox>
Date:	Mon, 13 Apr 2015 12:57:44 +0200
From:	Christoffer Dall <christoffer.dall@...aro.org>
To:	Alex Bennée <alex.bennee@...aro.org>
Cc:	kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, marc.zyngier@....com,
	peter.maydell@...aro.org, agraf@...e.de, drjones@...hat.com,
	pbonzini@...hat.com, zhichao.huang@...aro.org,
	jan.kiszka@...mens.com, dahi@...ux.vnet.ibm.com,
	r65777@...escale.com, bp@...e.de, Gleb Natapov <gleb@...nel.org>,
	"open list:ABI/API" <linux-api@...r.kernel.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 01/10] KVM: add commentary for kvm_debug_exit_arch
 struct

On Tue, Mar 31, 2015 at 04:07:59PM +0100, Alex Bennée wrote:
> Bring into line with the commentary for the other structures and their
> KVM_EXIT_* cases.
> 
> Signed-off-by: Alex Bennée <alex.bennee@...aro.org>
> 
> ---
> 
> v2
>   - add comments for other exit types
> 
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 8055706..5eedf84 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -226,6 +226,7 @@ struct kvm_run {
>  			__u32 count;
>  			__u64 data_offset; /* relative to kvm_run start */
>  		} io;
> +		/* KVM_EXIT_DEBUG */
>  		struct {
>  			struct kvm_debug_exit_arch arch;
>  		} debug;
> @@ -274,6 +275,7 @@ struct kvm_run {
>  			__u32 data;
>  			__u8  is_write;
>  		} dcr;
> +		/* KVM_EXIT_INTERNAL_ERROR */
>  		struct {
>  			__u32 suberror;
>  			/* Available with KVM_CAP_INTERNAL_ERROR_DATA: */
> @@ -284,6 +286,7 @@ struct kvm_run {
>  		struct {
>  			__u64 gprs[32];
>  		} osi;
> +		/* KVM_EXIT_PAPR_HCALL */
>  		struct {
>  			__u64 nr;
>  			__u64 ret;
> -- 
> 2.3.4
> 

I'm fine with this change as it is, but I think it should update the
documenation of the kvm_run structure along with it, and in there it
seems the debug struct is listed as 'unused'; this should be addressed
in this patch set somewhere if we start using this struct?

-Christoffer
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