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author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2012-01-30 20:21:48 +0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-03-20 23:34:07 +0400 |
commit | 9846ff10af12f9e7caac696737db6c990592a74a (patch) | |
tree | f0b047fedc93c820ed63657fd5c9bb28457b69ce /include/xen/interface/physdev.h | |
parent | 102b208e6b3b16d3611b67a7af9a93d30b92c006 (diff) | |
download | linux-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/interface/physdev.h')
-rw-r--r-- | include/xen/interface/physdev.h | 21 |
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. */ |