PCI: add xen dom0 checking before ACS initialization
This patch is predicated on Jeremy's patch in include/xen/xen.h. It'll prevent ACS init unless the platform has both an IOMMU and we're running as dom0. Signed-off-by: Allen Kay <allen.m.kay@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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@ -11,6 +11,7 @@
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#include <linux/cpumask.h>
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#include <linux/pci-aspm.h>
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#include <linux/iommu.h>
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#include <xen/xen.h>
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#include "pci.h"
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#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */
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@ -1007,7 +1008,7 @@ static void pci_init_capabilities(struct pci_dev *dev)
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pci_iov_init(dev);
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/* Enable ACS P2P upstream forwarding */
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if (iommu_found())
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if (iommu_found() || xen_initial_domain())
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pci_enable_acs(dev);
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}
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