Generalize this function out of pci_setup_msi(), then it can be further
used to enable INTx (or, disable MSI).
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
---
lib/pci.c | 19 +++++++++++++++++--
lib/pci.h | 1 +
2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/lib/pci.c b/lib/pci.c
index a7cfacb..5062036 100644
--- a/lib/pci.c
+++ b/lib/pci.c
@@ -39,6 +39,22 @@ void pci_cap_walk(struct pci_dev *dev)
}
}
+void pci_msi_set_enable(struct pci_dev *dev, bool enabled)
+{
+ uint16_t msi_control;
+ uint16_t offset;
+
+ offset = dev->msi_offset;
+ msi_control = pci_config_readw(dev->bdf, offset + PCI_MSI_FLAGS);
+
+ if (enabled)
+ msi_control |= PCI_MSI_FLAGS_ENABLE;
+ else
+ msi_control &= ~PCI_MSI_FLAGS_ENABLE;
+
+ pci_config_writew(dev->bdf, offset + PCI_MSI_FLAGS, msi_control);
+}
+
bool pci_setup_msi(struct pci_dev *dev, uint64_t msi_addr, uint32_t msi_data)
{
uint16_t msi_control;
@@ -69,8 +85,7 @@ bool pci_setup_msi(struct pci_dev *dev, uint64_t msi_addr, uint32_t msi_data)
}
printf("addr=0x%lx, data=0x%x\n", msi_addr, msi_data);
- msi_control |= PCI_MSI_FLAGS_ENABLE;
- pci_config_writew(addr, offset + PCI_MSI_FLAGS, msi_control);
+ pci_msi_set_enable(dev, true);
return true;
}
diff --git a/lib/pci.h b/lib/pci.h
index df86951..0815754 100644
--- a/lib/pci.h
+++ b/lib/pci.h
@@ -65,6 +65,7 @@ extern bool pci_bar_is_valid(struct pci_dev *dev, int bar_num);
extern void pci_bar_print(struct pci_dev *dev, int bar_num);
extern void pci_dev_print_id(pcidevaddr_t dev);
extern uint8_t pci_intx_line(struct pci_dev *dev);
+void pci_msi_set_enable(struct pci_dev *dev, bool enabled);
extern int pci_testdev(void);
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
