v2 -> v3: Saved structure has variable contents. Avi, see if this adds any credibility to the pci-core allocated opaque buffer. It was wrong in the previous versions to distill the variable device capability save list into a fixed struct. This should also eliminate any future maintenance specific to this storing and loading of state as capability save changes. v1 -> v2: Make the pointer passed around less opaque for type safety. Bug https://bugs.launchpad.net/qemu/+bug/754591 is caused because the KVM module attempts to do a pci_save_state() before assigning the device to a VM, expecting that the saved state will remain valid until we release the device. This is in conflict with our need to reset devices using PCI sysfs during a VM reset to quiesce the device. Any calls to pci_reset_function() will overwrite the device saved stated prior to reset, and reload and invalidate the state after. KVM then ends up trying to restore the state, but it's already invalid, so the device ends up with reset values. This series adds a mechanism to pull the saved state off the struct pci_dev and reload it later. Thanks, Alex --- Alex Williamson (3): KVM: Use pci_store/load_saved_state() around VM device usage PCI: Add interfaces to store and load the device saved state PCI: Track the size of each saved capability data area drivers/pci/pci.c | 110 ++++++++++++++++++++++++++++++++++++++++++++-- include/linux/kvm_host.h | 1 include/linux/pci.h | 15 +++++- virt/kvm/assigned-dev.c | 18 ++++++-- 4 files changed, 132 insertions(+), 12 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
