PCI/IOV: Restore VF resizable BAR state after reset

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Similar to regular resizable BARs, VF BARs can also be resized, e.g. by the
system firmware or the PCI subsystem itself.

The capability layout is the same as PCI_EXT_CAP_ID_REBAR.

Add the capability ID and restore it as a part of IOV state.

See PCIe r6.2, sec 7.8.7.

Signed-off-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patch.msgid.link/20250702093522.518099-2-michal.winiarski@intel.com

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This commit is contained in:

Michał Winiarski 2025-07-02 11:35:18 +02:00 • committed by Bjorn Helgaas

parent 19272b37aa

commit 5a8f77e24a

3 changed files with 50 additions and 1 deletions

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30

drivers/pci/iov.c

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12

drivers/pci/pci.h

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9

include/uapi/linux/pci_regs.h

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