Commit 1d53a3a7 authored by Frank Blaschka's avatar Frank Blaschka Committed by Alex Williamson
Browse files

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: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 0df1f248

drivers/vfio/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -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

drivers/vfio/pci/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -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

drivers/vfio/pci/vfio_pci.c

+3 −2
Original line number Diff line number Diff line
@@ -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;

drivers/vfio/pci/vfio_pci_config.c

+7 −0
Original line number Diff line number Diff line
@@ -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;