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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>
This commit is contained in:
Allen Kay 2009-10-07 10:27:51 -07:00 committed by Jesse Barnes
parent ae21ee65e8
commit df0e97c6f1
1 changed files with 2 additions and 1 deletions
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3
drivers/pci/probe.c
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@ -11,6 +11,7 @@
#include <linux/cpumask.h>
#include <linux/pci-aspm.h>
#include <linux/iommu.h>
#include <xen/xen.h>
#include "pci.h"
#define CARDBUS_LATENCY_TIMER 176 /* secondary latency timer */
@ -1007,7 +1008,7 @@ static void pci_init_capabilities(struct pci_dev *dev)
pci_iov_init(dev);
/* Enable ACS P2P upstream forwarding */
if (iommu_found())
if (iommu_found() || xen_initial_domain())
pci_enable_acs(dev);
}