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| author | Chris Wright <chrisw@sous-sol.org> | 2009-12-04 23:15:21 +0300 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-12-05 03:19:24 +0300 |
| commit | 5d990b627537e59a3a2f039ff588a4750e9c1a6a (patch) | |
| tree | 8c0e723c3f9146da52b30c087a80fc417df2b41b /include/linux/pci.h | |
| parent | b26a34aa4792b3db2500b8a98cb7702765c1a92e (diff) | |
| download | linux-5d990b627537e59a3a2f039ff588a4750e9c1a6a.tar.xz | |
PCI: add pci_request_acs
Commit ae21ee65e8bc228416bbcc8a1da01c56a847a60c "PCI: acs p2p upsteram
forwarding enabling" doesn't actually enable ACS.
Add a function to pci core to allow an IOMMU to request that ACS
be enabled. The existing mechanism of using iommu_found() in the pci
core to know when ACS should be enabled doesn't actually work due to
initialization order; iommu has only been detected not initialized.
Have Intel and AMD IOMMUs request ACS, and Xen does as well during early
init of dom0.
Cc: Allen Kay <allen.m.kay@intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'include/linux/pci.h')
| -rw-r--r-- | include/linux/pci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci.h b/include/linux/pci.h index 2891c3d3e51a..04771b9c3316 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1328,5 +1328,7 @@ static inline bool pci_is_pcie(struct pci_dev *dev) return !!pci_pcie_cap(dev); } +void pci_request_acs(void); + #endif /* __KERNEL__ */ #endif /* LINUX_PCI_H */ |