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 d8c57636b9ce8750d128169e85b1c9ce3094219a..b93c25901e8922feab075b91dd3d875a7485a0f9 100644 (file)
--- a/drivers/vfio/Kconfig
+++ b/drivers/vfio/Kconfig
@@ -16,7 +16,7 @@ config VFIO_SPAPR_EEH
 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 c41b01e2b693e71b4f9640bd6577401318cbbe5e..c6bb5da2d2a7183307b62e5a50e18e759ea2ee94 100644 (file)
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -16,3 +16,11 @@ config VFIO_PCI_VGA
          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 9558da3f06a05ac11706a3294c98efc0b2823502..255201f22126aabd9ea9178fe353cf5f42a82c68 100644 (file)
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -215,7 +215,7 @@ static int vfio_pci_get_irq_count(struct vfio_pci_device *vdev, int irq_type)
        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 @@ static long vfio_pci_ioctl(void *device_data,
 
                        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 1de3f94aa7de486d2d0e7bff5b3d603f1aa3bd13..ff75ca31a199d1a2c468b71bf0d9b4566f1894b7 100644 (file)
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -609,6 +609,10 @@ static int __init init_pci_cap_basic_perm(struct perm_bits *perm)
 
        /* 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 @@ int vfio_config_init(struct vfio_pci_device *vdev)
                *(__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;