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authorStefano Stabellini <stefano.stabellini@eu.citrix.com>2012-01-30 20:21:48 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-03-20 23:34:07 +0400
commit9846ff10af12f9e7caac696737db6c990592a74a (patch)
treef0b047fedc93c820ed63657fd5c9bb28457b69ce /include/xen
parent102b208e6b3b16d3611b67a7af9a93d30b92c006 (diff)
downloadlinux-9846ff10af12f9e7caac696737db6c990592a74a.tar.xz
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 <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/interface/physdev.h21
1 files changed, 21 insertions, 0 deletions
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
@@ -39,6 +39,27 @@ struct physdev_eoi {
};
/*
+ * 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.
*/