diff options
| author | Jan Beulich <JBeulich@suse.com> | 2013-03-12 15:06:23 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 09:25:49 -0700 |
| commit | a420a7e3a40a8396104d9a62f676205f2db1a671 (patch) | |
| tree | 854c0fe3be126e3e2e1779ac2af227723a3c2c95 /include | |
| parent | e131628113867748a05c9080b9aaf67740d24057 (diff) | |
xen-pciback: notify hypervisor about devices intended to be assigned to guests
commit 909b3fdb0dd4f3db07b2d75425a00a2adb551383 upstream.
For MSI-X capable devices the hypervisor wants to write protect the
MSI-X table and PBA, yet it can't assume that resources have been
assigned to their final values at device enumeration time. Thus have
pciback do that notification, as having the device controlled by it is
a prerequisite to assigning the device to guests anyway.
This is the kernel part of hypervisor side commit 4245d33 ("x86/MSI:
add mechanism to fully protect MSI-X table from PV guest accesses") on
the master branch of git://xenbits.xen.org/xen.git.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/xen/interface/physdev.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 1844d31f455..7000bb1f6e9 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -251,6 +251,12 @@ struct physdev_pci_device_add { #define PHYSDEVOP_pci_device_remove 26 #define PHYSDEVOP_restore_msi_ext 27 +/* + * Dom0 should use these two to announce MMIO resources assigned to + * MSI-X capable devices won't (prepare) or may (release) change. + */ +#define PHYSDEVOP_prepare_msix 30 +#define PHYSDEVOP_release_msix 31 struct physdev_pci_device { /* IN */ uint16_t seg; |