linux-kernel - Re: [PATCH 1/3] xen: update xen headers

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Date:	Tue, 5 Jul 2016 16:07:12 +0100 (BST)
From:	Stefano Stabellini <sstabellini@...nel.org>
To:	Juergen Gross <jgross@...e.com>
cc:	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	sstabellini@...nel.org, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com
Subject: Re: [PATCH 1/3] xen: update xen headers

On Wed, 22 Jun 2016, Juergen Gross wrote:
> Update some Xen headers to be able to use new functionality.
> 
> Signed-off-by: Juergen Gross <jgross@...e.com>

Reviewed-by: Stefano Stabellini <sstabellini@...nel.org>


>  include/xen/interface/vcpu.h | 24 +++++++++++++++---------
>  include/xen/interface/xen.h  | 17 ++++++++++++++++-
>  2 files changed, 31 insertions(+), 10 deletions(-)
> 
> diff --git a/include/xen/interface/vcpu.h b/include/xen/interface/vcpu.h
> index b05288c..98188c8 100644
> --- a/include/xen/interface/vcpu.h
> +++ b/include/xen/interface/vcpu.h
> @@ -75,15 +75,21 @@
>   */
>  #define VCPUOP_get_runstate_info	 4
>  struct vcpu_runstate_info {
> -		/* VCPU's current state (RUNSTATE_*). */
> -		int		 state;
> -		/* When was current state entered (system time, ns)? */
> -		uint64_t state_entry_time;
> -		/*
> -		 * Time spent in each RUNSTATE_* (ns). The sum of these times is
> -		 * guaranteed not to drift from system time.
> -		 */
> -		uint64_t time[4];
> +	/* VCPU's current state (RUNSTATE_*). */
> +	int		 state;
> +	/* When was current state entered (system time, ns)? */
> +	uint64_t state_entry_time;
> +	/*
> +	 * Update indicator set in state_entry_time:
> +	 * When activated via VMASST_TYPE_runstate_update_flag, set during
> +	 * updates in guest memory mapped copy of vcpu_runstate_info.
> +	 */
> +#define XEN_RUNSTATE_UPDATE	(1ULL << 63)
> +	/*
> +	 * Time spent in each RUNSTATE_* (ns). The sum of these times is
> +	 * guaranteed not to drift from system time.
> +	 */
> +	uint64_t time[4];
>  };
>  DEFINE_GUEST_HANDLE_STRUCT(vcpu_runstate_info);
>  
> diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h
> index d133112..1b0d189 100644
> --- a/include/xen/interface/xen.h
> +++ b/include/xen/interface/xen.h
> @@ -413,7 +413,22 @@ DEFINE_GUEST_HANDLE_STRUCT(mmuext_op);
>  /* x86/PAE guests: support PDPTs above 4GB. */
>  #define VMASST_TYPE_pae_extended_cr3     3
>  
> -#define MAX_VMASST_TYPE 3
> +/*
> + * x86 guests: Sane behaviour for virtual iopl
> + *  - virtual iopl updated from do_iret() hypercalls.
> + *  - virtual iopl reported in bounce frames.
> + *  - guest kernels assumed to be level 0 for the purpose of iopl checks.
> + */
> +#define VMASST_TYPE_architectural_iopl   4
> +
> +/*
> + * All guests: activate update indicator in vcpu_runstate_info
> + * Enable setting the XEN_RUNSTATE_UPDATE flag in guest memory mapped
> + * vcpu_runstate_info during updates of the runstate information.
> + */
> +#define VMASST_TYPE_runstate_update_flag 5
> +
> +#define MAX_VMASST_TYPE 5
>  
>  #ifndef __ASSEMBLY__
>  
> -- 
> 2.6.6
>