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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-12-01 17:51:44 +0300 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-12-02 17:28:22 +0300 |
| commit | e5fc7345412d5e4758fcef55a74354c5cbefd61e (patch) | |
| tree | 00f8303544240826fb2dd2b97de5ff66596e7beb /include | |
| parent | e8a7e48bb248a1196484d3f8afa53bded2b24e71 (diff) | |
| download | linux-e5fc7345412d5e4758fcef55a74354c5cbefd61e.tar.xz | |
xen: use PHYSDEVOP_get_free_pirq to implement find_unbound_pirq
Use the new hypercall PHYSDEVOP_get_free_pirq to ask Xen to allocate a
pirq. Remove the unsupported PHYSDEVOP_get_nr_pirqs hypercall to get the
amount of pirq available.
This fixes find_unbound_pirq that otherwise would return a number
starting from nr_irqs that might very well be out of range in Xen.
The symptom of this bug is that when you passthrough an MSI capable pci
device to a PV on HVM guest, Linux would fail to enable MSIs on the
device.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/xen/interface/physdev.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 2b2c66c3df00..534cac89a77d 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -188,6 +188,16 @@ struct physdev_nr_pirqs { uint32_t nr_pirqs; }; +/* type is MAP_PIRQ_TYPE_GSI or MAP_PIRQ_TYPE_MSI + * the hypercall returns a free pirq */ +#define PHYSDEVOP_get_free_pirq 23 +struct physdev_get_free_pirq { + /* IN */ + int type; + /* OUT */ + uint32_t pirq; +}; + /* * Notify that some PIRQ-bound event channels have been unmasked. * ** This command is obsolete since interface version 0x00030202 and is ** |