vfio: make vfio run on s390
add Kconfig switch to hide INTx
add Kconfig switch to let vfio announce PCI BARs are not mapable
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/drivers/vfio/Kconfig b/drivers/vfio/Kconfig
index d8c5763..b93c259 100644
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -16,7 +16,7 @@
menuconfig VFIO
tristate "VFIO Non-Privileged userspace driver framework"
depends on IOMMU_API
- select VFIO_IOMMU_TYPE1 if X86
+ select VFIO_IOMMU_TYPE1 if (X86 || S390)
select VFIO_IOMMU_SPAPR_TCE if (PPC_POWERNV || PPC_PSERIES)
select VFIO_SPAPR_EEH if (PPC_POWERNV || PPC_PSERIES)
select ANON_INODES
diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
index c41b01e..c6bb5da 100644
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -16,3 +16,11 @@
BIOS and generic video drivers.
If you don't know what to do here, say N.
+
+config VFIO_PCI_MMAP
+ depends on VFIO_PCI
+ def_bool y if !S390
+
+config VFIO_PCI_INTX
+ depends on VFIO_PCI
+ def_bool y if !S390
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 9558da3..255201f 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -215,7 +215,7 @@
if (irq_type == VFIO_PCI_INTX_IRQ_INDEX) {
u8 pin;
pci_read_config_byte(vdev->pdev, PCI_INTERRUPT_PIN, &pin);
- if (pin)
+ if (IS_ENABLED(CONFIG_VFIO_PCI_INTX) && pin)
return 1;
} else if (irq_type == VFIO_PCI_MSI_IRQ_INDEX) {
@@ -406,7 +406,8 @@
info.flags = VFIO_REGION_INFO_FLAG_READ |
VFIO_REGION_INFO_FLAG_WRITE;
- if (pci_resource_flags(pdev, info.index) &
+ if (IS_ENABLED(CONFIG_VFIO_PCI_MMAP) &&
+ pci_resource_flags(pdev, info.index) &
IORESOURCE_MEM && info.size >= PAGE_SIZE)
info.flags |= VFIO_REGION_INFO_FLAG_MMAP;
break;
diff --git a/drivers/vfio/pci/vfio_pci_config.c b/drivers/vfio/pci/vfio_pci_config.c
index 1de3f94..ff75ca3 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -609,6 +609,10 @@
/* Sometimes used by sw, just virtualize */
p_setb(perm, PCI_INTERRUPT_LINE, (u8)ALL_VIRT, (u8)ALL_WRITE);
+
+ /* Virtualize interrupt pin to allow hiding INTx */
+ p_setb(perm, PCI_INTERRUPT_PIN, (u8)ALL_VIRT, (u8)NO_WRITE);
+
return 0;
}
@@ -1445,6 +1449,9 @@
*(__le16 *)&vconfig[PCI_DEVICE_ID] = cpu_to_le16(pdev->device);
}
+ if (!IS_ENABLED(CONFIG_VFIO_PCI_INTX))
+ vconfig[PCI_INTERRUPT_PIN] = 0;
+
ret = vfio_cap_init(vdev);
if (ret)
goto out;