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* xen/pcifront: Report the errors better.Konrad Rzeszutek Wilk2016-02-151-2/+2
| | | | | | | The messages should be different depending on the type of error. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
* xen/pci: Squash pci_xen_initial_domain and xen_setup_pirqs together.Konrad Rzeszutek Wilk2011-07-111-2/+3
| | | | | | | Since they are only called once and the rest of the pci_xen_* functions follow the same pattern of setup. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/pci: Add xen_[find|register|unregister]_device_domain_owner functions.Konrad Rzeszutek Wilk2011-04-141-0/+16
| | | | | | | | | | | | | | When the Xen PCI backend is told to enable or disable MSI/MSI-X functions, the initial domain performs these operations. The initial domain needs to know which domain (guest) is going to use the PCI device so when it makes the appropiate hypercall to retrieve the MSI/MSI-X vector it will also assign the PCI device to the appropiate domain (guest). This boils down to us needing a mechanism to find, set and unset the domain id that will be using the device. [v2: EXPORT_SYMBOL -> EXPORT_SYMBOL_GPL.] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* pci/xen: Cleanup: convert int** to int[]Konrad Rzeszutek Wilk2011-02-181-4/+4
| | | | | | | | Cleanup code. Cosmetic change to make the code look easier to read. Reviewed-by: Ian Campbell <Ian.Campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: remap GSIs as pirqs when running as initial domainJeremy Fitzhardinge2010-10-221-0/+7
| | | | | | | | | | | | Implement xen_register_gsi to setup the correct triggering and polarity properties of a gsi. Implement xen_register_pirq to register a particular gsi as pirq and receive interrupts as events. Call xen_setup_pirqs to register all the legacy ISA irqs as pirqs. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen: support GSI -> pirq remapping in PV on HVM guestsStefano Stabellini2010-10-221-0/+5
| | | | | | | | | | Disable pcifront when running on HVM: it is meant to be used with pv guests that don't have PCI bus. Use acpi_register_gsi_xen_hvm to remap GSIs into pirqs. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
* xen/x86/PCI: Add support for the Xen PCI subsystemAlex Nixon2010-10-181-0/+53
The frontend stub lives in arch/x86/pci/xen.c, alongside other sub-arch PCI init code (e.g. olpc.c). It provides a mechanism for Xen PCI frontend to setup/destroy legacy interrupts, MSI/MSI-X, and PCI configuration operations. [ Impact: add core of Xen PCI support ] [ v2: Removed the IOMMU code and only focusing on PCI.] [ v3: removed usage of pci_scan_all_fns as that does not exist] [ v4: introduced pci_xen value to fix compile warnings] [ v5: squished fixes+features in one patch, changed Reviewed-by to Ccs] [ v7: added Acked-by] Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Qing He <qing.he@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org
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