Han, Weidong
2010-Jul-05 07:08 UTC
[Xen-devel] [PATCH 2/3] x2APIC/VT-d: improve interrupt remapping and queued invalidation enabling and disabling
x2APIC depends on interrupt remapping, so interrupt remapping needs to be enabled before x2APIC. Usually x2APIC is not enabled (x2apic_enabled=0) when enable interrupt remapping, although x2APIC will be enabled later. So it needs to pass a parameter to set interrupt mode in intremap_enable, instead of checking x2apic_enable. This patch adds a parameter "eim" to intremap_enable to achieve it. Interrupt remapping and queued invalidation are already enabled when enable x2apic, so it needn''t to enable them again when setup iommu. This patch checks if interrupt remapping and queued invalidation are already enable or not, and won''t enable them if already enabled. It does the similar in disabling, that''s to say don''t disable them if already disabled. Signed-off-by: Weidong Han <weidong.han@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel