diff options
Diffstat (limited to 'hw/pci-bridge/pci_bridge_dev.c')
| -rw-r--r-- | hw/pci-bridge/pci_bridge_dev.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/hw/pci-bridge/pci_bridge_dev.c b/hw/pci-bridge/pci_bridge_dev.c index 41ca47b..5dbd933 100644 --- a/hw/pci-bridge/pci_bridge_dev.c +++ b/hw/pci-bridge/pci_bridge_dev.c @@ -42,9 +42,10 @@ struct PCIBridgeDev { MemoryRegion bar; uint8_t chassis_nr; -#define PCI_BRIDGE_DEV_F_MSI_REQ 0 -#define PCI_BRIDGE_DEV_F_SHPC_REQ 1 +#define PCI_BRIDGE_DEV_F_SHPC_REQ 0 uint32_t flags; + + OnOffAuto msi; }; typedef struct PCIBridgeDev PCIBridgeDev; @@ -53,6 +54,7 @@ static int pci_bridge_dev_initfn(PCIDevice *dev) PCIBridge *br = PCI_BRIDGE(dev); PCIBridgeDev *bridge_dev = PCI_BRIDGE_DEV(dev); int err; + Error *local_err = NULL; pci_bridge_initfn(dev, TYPE_PCI_BUS); @@ -66,7 +68,7 @@ static int pci_bridge_dev_initfn(PCIDevice *dev) } } else { /* MSI is not applicable without SHPC */ - bridge_dev->flags &= ~(1 << PCI_BRIDGE_DEV_F_MSI_REQ); + bridge_dev->msi = ON_OFF_AUTO_OFF; } err = slotid_cap_init(dev, 0, bridge_dev->chassis_nr, 0); @@ -74,12 +76,23 @@ static int pci_bridge_dev_initfn(PCIDevice *dev) goto slotid_error; } - if ((bridge_dev->flags & (1 << PCI_BRIDGE_DEV_F_MSI_REQ)) && - msi_nonbroken) { - err = msi_init(dev, 0, 1, true, true); - if (err < 0) { + if (bridge_dev->msi != ON_OFF_AUTO_OFF) { + /* it means SHPC exists, because MSI is needed by SHPC */ + + err = msi_init(dev, 0, 1, true, true, &local_err); + /* Any error other than -ENOTSUP(board's MSI support is broken) + * is a programming error */ + assert(!err || err == -ENOTSUP); + if (err && bridge_dev->msi == ON_OFF_AUTO_ON) { + /* Can't satisfy user's explicit msi=on request, fail */ + error_append_hint(&local_err, "You have to use msi=auto (default) " + "or msi=off with this machine type.\n"); + error_report_err(local_err); goto msi_error; } + assert(!local_err || bridge_dev->msi == ON_OFF_AUTO_AUTO); + /* With msi=auto, we fall back to MSI off silently */ + error_free(local_err); } if (shpc_present(dev)) { @@ -147,8 +160,8 @@ static Property pci_bridge_dev_properties[] = { /* Note: 0 is not a legal chassis number. */ DEFINE_PROP_UINT8(PCI_BRIDGE_DEV_PROP_CHASSIS_NR, PCIBridgeDev, chassis_nr, 0), - DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, flags, - PCI_BRIDGE_DEV_F_MSI_REQ, true), + DEFINE_PROP_ON_OFF_AUTO(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, msi, + ON_OFF_AUTO_AUTO), DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags, PCI_BRIDGE_DEV_F_SHPC_REQ, true), DEFINE_PROP_END_OF_LIST(), |