A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

VFIO updates for v4.20

Browse source 
- EDID interfaces for vfio devices supporting display extensions
    (Gerd Hoffmann)
 
  - Generically select Type-1 IOMMU model support on ARM/ARM64
    (Geert Uytterhoeven)
 
  - Quirk for VFs reporting INTx pin (Alex Williamson)
 
  - Fix error path memory leak in MSI support (Li Qiang)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2.0.14 (GNU/Linux)
 
 iQIcBAABAgAGBQJb2MH7AAoJECObm247sIsiJ/wP+gOlhmUz7eVNhf8ZMC9+17Ev
 mWy41waHW4ATBWRxuaSNetLG0E3Cbt9IMpf6yx3YTuOiD+zCwUUJm934ZVfOUMWb
 yh5UEC2W4+fUt8HjDvYwuGlpyVeEwSTVnprtWjYz9bBsHbCeK7WY4vUeo6WHFrTt
 K+WOsYXC8TEzqj/VQ851Cr0Q23SzdlUFOWhKN0AO/CXshsOzL8An3Ryx95X26oPc
 HlVd1+KDOxpAKmfhA028HeT2GBy6Yu6EjJEGMwo66QtylwTJCPbNxTlg1/noYTTz
 1uV02FR7oAZcmuP6R4iKLr4UBfmJDs2hjIVS6Bcm561KL+tXAUl1FX91ky7snaRq
 0wqMUBJbAmDUEx2smFQI81LoE0OHN4T/u99uEe0cyZ/aNsAcnmbwWRS0rl/1s2eD
 AE9Ht05yMRDp4ENUc8aBKHbXWjId2HjxZwqAzAFd2moVpaD4W/4bZ1ZXssbGTaQk
 /VCXnYl8HJTqAjRwqChW6dc4d2tMaTDIU+FDD85yJVzg4DEZg4xJCAz6CWsGjYmr
 JWHh2iu8fO8FAFhqx5vNz2PzTQUWfi3yfGUNRSH7pFCX07AQ25LdSwQxOQ3eov/X
 YyqFINLscLePrAzw1WAAOk3ghCFBWw/mpIXyzShYNnrGnre+tzbzOSwSFcgMojlc
 nHP6PB+3S4VR24k6ZzUc
 =cat2
 -----END PGP SIGNATURE-----

Merge tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio

Pull VFIO updates from Alex Williamson:

 - EDID interfaces for vfio devices supporting display extensions (Gerd
   Hoffmann)

 - Generically select Type-1 IOMMU model support on ARM/ARM64 (Geert
   Uytterhoeven)

 - Quirk for VFs reporting INTx pin (Alex Williamson)

 - Fix error path memory leak in MSI support (Li Qiang)

* tag 'vfio-v4.20-rc1.v2' of git://github.com/awilliam/linux-vfio:
  vfio: add edid support to mbochs sample driver
  vfio: add edid api for display (vgpu) devices.
  drivers/vfio: Allow type-1 IOMMU instantiation with all ARM/ARM64 IOMMUs
  vfio/pci: Mask buggy SR-IOV VF INTx support
  vfio/pci: Fix potential memory leak in vfio_msi_cap_len
This commit is contained in:
Linus Torvalds 2018-10-31 11:01:38 -07:00
commit 0c86e761b9
5 changed files with 204 additions and 23 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/vfio/Kconfig
View file

@ -21,7 +21,7 @@ config VFIO_VIRQFD
menuconfig VFIO
tristate "VFIO Non-Privileged userspace driver framework"
depends on IOMMU_API
select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM_SMMU || ARM_SMMU_V3)
select VFIO_IOMMU_TYPE1 if (X86 || S390 || ARM || ARM64)
select ANON_INODES
help
VFIO provides a framework for secure userspace device drivers.

10
drivers/vfio/pci/vfio_pci.c
View file

@ -434,10 +434,14 @@ 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 (IS_ENABLED(CONFIG_VFIO_PCI_INTX) && !vdev->nointx && pin)
return 1;
if (!IS_ENABLED(CONFIG_VFIO_PCI_INTX) ||
vdev->nointx || vdev->pdev->is_virtfn)
return 0;
pci_read_config_byte(vdev->pdev, PCI_INTERRUPT_PIN, &pin);
return pin ? 1 : 0;
} else if (irq_type == VFIO_PCI_MSI_IRQ_INDEX) {
u8 pos;
u16 flags;

31
drivers/vfio/pci/vfio_pci_config.c
View file

@ -1180,8 +1180,10 @@ static int vfio_msi_cap_len(struct vfio_pci_device *vdev, u8 pos)
return -ENOMEM;
ret = init_pci_cap_msi_perm(vdev->msi_perm, len, flags);
if (ret)
if (ret) {
kfree(vdev->msi_perm);
return ret;
}
return len;
}
@ -1609,6 +1611,15 @@ static int vfio_ecap_init(struct vfio_pci_device *vdev)
return 0;
}
/*
* Nag about hardware bugs, hopefully to have vendors fix them, but at least
* to collect a list of dependencies for the VF INTx pin quirk below.
*/
static const struct pci_device_id known_bogus_vf_intx_pin[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x270c) },
{}
};
/*
* For each device we allocate a pci_config_map that indicates the
* capability occupying each dword and thus the struct perm_bits we
@ -1674,6 +1685,24 @@ int vfio_config_init(struct vfio_pci_device *vdev)
if (pdev->is_virtfn) {
*(__le16 *)&vconfig[PCI_VENDOR_ID] = cpu_to_le16(pdev->vendor);
*(__le16 *)&vconfig[PCI_DEVICE_ID] = cpu_to_le16(pdev->device);
/*
* Per SR-IOV spec rev 1.1, 3.4.1.18 the interrupt pin register
* does not apply to VFs and VFs must implement this register
* as read-only with value zero. Userspace is not readily able
* to identify whether a device is a VF and thus that the pin
* definition on the device is bogus should it violate this
* requirement. We already virtualize the pin register for
* other purposes, so we simply need to replace the bogus value
* and consider VFs when we determine INTx IRQ count.
*/
if (vconfig[PCI_INTERRUPT_PIN] &&
!pci_match_id(known_bogus_vf_intx_pin, pdev))
pci_warn(pdev,
"Hardware bug: VF reports bogus INTx pin %d\n",
vconfig[PCI_INTERRUPT_PIN]);
vconfig[PCI_INTERRUPT_PIN] = 0; /* Gratuitous for good VFs */
}
if (!IS_ENABLED(CONFIG_VFIO_PCI_INTX) || vdev->nointx)