[Xen-devel] [PATCH 2/3] x2APIC/VT-d: improve interrupt remapping and queued invalidation enabling and disabling

["Han, Weidong" <weidong.han@xxxxxxxxx>]

        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@xxxxxxxxx>

Attachment: ir-qi.patch
Description: ir-qi.patch

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel