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authorWeidong Han <weidong.han@intel.com>2009-05-23 00:41:15 +0800
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-06-23 22:09:17 +0100
commitf007e99c8e2e322b8331aba72414715119a2920d (patch)
tree616bfcdda74341dc8b5d9ea1013bb7506407a961 /net/irda
parentc4658b4e777bebf69884f4884a9bfb2f84dd71d9 (diff)
Intel-IOMMU, intr-remap: source-id checking
To support domain-isolation usages, the platform hardware must be capable of uniquely identifying the requestor (source-id) for each interrupt message. Without source-id checking for interrupt remapping , a rouge guest/VM with assigned devices can launch interrupt attacks to bring down anothe guest/VM or the VMM itself. This patch adds source-id checking for interrupt remapping, and then really isolates interrupts for guests/VMs with assigned devices. Because PCI subsystem is not initialized yet when set up IOAPIC entries, use read_pci_config_byte to access PCI config space directly. Signed-off-by: Weidong Han <weidong.han@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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