From 9846ff10af12f9e7caac696737db6c990592a74a Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Mon, 30 Jan 2012 16:21:48 +0000 Subject: xen: support pirq_eoi_map The pirq_eoi_map is a bitmap offered by Xen to check which pirqs need to be EOI'd without having to issue an hypercall every time. We use PHYSDEVOP_pirq_eoi_gmfn_v2 to map the bitmap, then if we succeed we use pirq_eoi_map to check whether pirqs need eoi. Changes in v3: - explicitly use PHYSDEVOP_pirq_eoi_gmfn_v2 rather than PHYSDEVOP_pirq_eoi_gmfn; - introduce pirq_check_eoi_map, a function to check if a pirq needs an eoi using the map; -rename pirq_needs_eoi into pirq_needs_eoi_flag; - introduce a function pointer called pirq_needs_eoi that is going to be set to the right implementation depending on the availability of PHYSDEVOP_pirq_eoi_gmfn_v2. Signed-off-by: Stefano Stabellini Signed-off-by: Konrad Rzeszutek Wilk --- include/xen/interface/physdev.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'include/xen') diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 0c28989007fb..9ce788d8cf49 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -38,6 +38,27 @@ struct physdev_eoi { uint32_t irq; }; +/* + * Register a shared page for the hypervisor to indicate whether the guest + * must issue PHYSDEVOP_eoi. The semantics of PHYSDEVOP_eoi change slightly + * once the guest used this function in that the associated event channel + * will automatically get unmasked. The page registered is used as a bit + * array indexed by Xen's PIRQ value. + */ +#define PHYSDEVOP_pirq_eoi_gmfn_v1 17 +/* + * Register a shared page for the hypervisor to indicate whether the + * guest must issue PHYSDEVOP_eoi. This hypercall is very similar to + * PHYSDEVOP_pirq_eoi_gmfn_v1 but it doesn't change the semantics of + * PHYSDEVOP_eoi. The page registered is used as a bit array indexed by + * Xen's PIRQ value. + */ +#define PHYSDEVOP_pirq_eoi_gmfn_v2 28 +struct physdev_pirq_eoi_gmfn { + /* IN */ + unsigned long gmfn; +}; + /* * Query the status of an IRQ line. * @arg == pointer to physdev_irq_status_query structure. -- cgit v1.2.3