[RFC 01/12] PCI: Add helpers to identify SR-IOV PFs/VFs.
From: Dimitri Daskalakis <hidden>
Date: 2026-06-04 15:01:57
Also in:
kvm, linux-pci, linux-s390, xen-devel
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
From: Dimitri Daskalakis <redacted> Throughout core the pci_dev attribute is_physfn is used to determine whether or not a PF has SR-IOV active. And is_virtfn is used to check if a device is a SR-IOV VF. These attributes should be generalized to represent PFs/VFs for any type of virtualization. So in preparation, wrap the existing usage in helpers and use helpers in subsequent patches to ease the transition. Assisted-by: Claude:claude-opus-4.7 Signed-off-by: Dimitri Daskalakis <redacted> --- include/linux/pci.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c4454583c11..28892243f49f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -604,6 +604,16 @@ static inline struct pci_dev *pci_physfn(struct pci_dev *dev) return dev; } +static inline bool pci_is_sriov_physfn(const struct pci_dev *dev) +{ + return dev->is_physfn; +} + +static inline bool pci_is_sriov_virtfn(const struct pci_dev *dev) +{ + return dev->is_virtfn; +} + struct pci_dev *pci_alloc_dev(struct pci_bus *bus); #define to_pci_dev(n) container_of(n, struct pci_dev, dev)
@@ -1277,6 +1287,7 @@ void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type); void pci_sort_breadthfirst(void); #define dev_is_pci(d) ((d)->bus == &pci_bus_type) #define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false)) +#define dev_is_sriov_pf(d) ((dev_is_pci(d) ? pci_is_sriov_physfn(to_pci_dev(d)) : false)) /* Generic PCI functions exported to card drivers */
@@ -2207,6 +2218,7 @@ static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; } #define dev_is_pci(d) (false) #define dev_is_pf(d) (false) +#define dev_is_sriov_pf(d) (false) static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags) { return false; } static inline int pci_irqd_intx_xlate(struct irq_domain *d,
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2.52.0