diff options
Diffstat (limited to 'arch/x86/pci/common.c')
| -rw-r--r-- | arch/x86/pci/common.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index df1d95913d4e..3507f456fcd0 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -19,6 +19,7 @@ #include <asm/smp.h> #include <asm/pci_x86.h> #include <asm/setup.h> +#include <asm/irqdomain.h> unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | PCI_PROBE_MMCONF; @@ -633,8 +634,9 @@ static void set_dev_domain_options(struct pci_dev *pdev) int pcibios_add_device(struct pci_dev *dev) { - struct setup_data *data; struct pci_setup_rom *rom; + struct irq_domain *msidom; + struct setup_data *data; u64 pa_data; pa_data = boot_params.hdr.setup_data; @@ -661,6 +663,20 @@ int pcibios_add_device(struct pci_dev *dev) memunmap(data); } set_dev_domain_options(dev); + + /* + * Setup the initial MSI domain of the device. If the underlying + * bus has a PCI/MSI irqdomain associated use the bus domain, + * otherwise set the default domain. This ensures that special irq + * domains e.g. VMD are preserved. The default ensures initial + * operation if irq remapping is not active. If irq remapping is + * active it will overwrite the domain pointer when the device is + * associated to a remapping domain. + */ + msidom = dev_get_msi_domain(&dev->bus->dev); + if (!msidom) + msidom = x86_pci_msi_default_domain; + dev_set_msi_domain(&dev->dev, msidom); return 0; } |