diff options
| author | Matthew Rosato <mjrosato@linux.ibm.com> | 2020-09-10 10:59:55 -0400 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-09-21 14:42:11 -0600 |
| commit | 12856e7acde4702b7c3238c15fcba86ff6aa507f (patch) | |
| tree | f9e0073991158db7fb74b6b0fe05444836722a1e | |
| parent | ba4f184e126b751d1bffad5897f263108befc780 (diff) | |
PCI/IOV: Mark VFs as not implementing PCI_COMMAND_MEMORY
For VFs, the Memory Space Enable bit in the Command Register is
hard-wired to 0.
Add a new bit to signify devices where the Command Register Memory
Space Enable bit does not control the device's response to MMIO
accesses.
Fixes: abafbc551fdd ("vfio-pci: Invalidate mmaps and block MMIO access on disabled memory")
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | drivers/pci/iov.c | 1 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index b37e08c4f9d1..4afd4ee4f7f0 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -180,6 +180,7 @@ int pci_iov_add_virtfn(struct pci_dev *dev, int id) virtfn->device = iov->vf_device; virtfn->is_virtfn = 1; virtfn->physfn = pci_dev_get(dev); + virtfn->no_command_memory = 1; if (id == 0) pci_read_vf_config_common(virtfn); diff --git a/include/linux/pci.h b/include/linux/pci.h index 835530605c0d..3ff723124ca7 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -445,6 +445,7 @@ struct pci_dev { unsigned int is_probed:1; /* Device probing in progress */ unsigned int link_active_reporting:1;/* Device capable of reporting link active */ unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */ + unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */ pci_dev_flags_t dev_flags; atomic_t enable_cnt; /* pci_enable_device has been called */ |