Re: [PATCH RFC 04/13] xen: implement basic PIRQ support for Dom0

On Tuesday, December 24, 2013 6:20:53 am Roger Pau Monne wrote:
> This allows Dom0 to manage physical hardware, redirecting the
> physical interrupts to event channels.
> ---
>  sys/x86/xen/xen_intr.c |  190 
+++++++++++++++++++++++++++++++++++++++++++++--
>  sys/xen/xen_intr.h     |   11 +++
>  2 files changed, 192 insertions(+), 9 deletions(-)
> 
> diff --git a/sys/x86/xen/xen_intr.c b/sys/x86/xen/xen_intr.c
> index bc0781e..340e5ed 100644
> --- a/sys/x86/xen/xen_intr.c
> +++ b/sys/x86/xen/xen_intr.c
> _at__at_ -104,6 +104,8 _at__at_ DPCPU_DECLARE(struct vcpu_info *, vcpu_info);
>  
>  #define is_valid_evtchn(x)	((x) != 0)
>  
> +#define	EEXIST	17	/* Xen "already exists" error */

Is there a xen_errno.h header?  Might be nice to have one and give these 
constants unique names (e.g. XEN_EEXIST or some such) to avoid 
confusion/conflicts with <sys/errno.h>.

Other than that I think this looks fine.

-- 
John Baldwin