diff options
| author | Frank Blaschka <frank.blaschka@de.ibm.com> | 2014-11-07 09:52:22 -0700 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2014-11-07 09:52:22 -0700 |
| commit | 1d53a3a7d3b886bcc60b90e41693b82a791c25ba (patch) | |
| tree | 0c3ccdb3b8b5c769b458b185b2eb209468e8667e /drivers/vfio/pci | |
| parent | 0df1f2487d2f0d04703f142813d53615d62a1da4 (diff) | |
| download | lwn-1d53a3a7d3b886bcc60b90e41693b82a791c25ba.tar.gz lwn-1d53a3a7d3b886bcc60b90e41693b82a791c25ba.zip | |
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>
Diffstat (limited to 'drivers/vfio/pci')
| -rw-r--r-- | drivers/vfio/pci/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/vfio/pci/vfio_pci.c | 5 | ||||
| -rw-r--r-- | drivers/vfio/pci/vfio_pci_config.c | 7 |
3 files changed, 18 insertions, 2 deletions
diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index c41b01e2b693..c6bb5da2d2a7 100644 --- 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 9558da3f06a0..255201f22126 100644 --- 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 1de3f94aa7de..ff75ca31a199 100644 --- 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; |