On Wed, Jul 16, 2025 at 09:08:32AM -0700, Dan Williams wrote: > Bjorn, > > This is a small collection of miscellaneous updates that originated in > the PCI/TSM work, but are suitable to go ahead in v6.17. It is a > documentation update and a new pci_bus_find_emul_domain_nr() helper. > > First, the PCI/TSM work (Trusted Execution Environment Security Manager > (PCI device assignment for confidential guests)) wants to add some > additional PCI host bridge sysfs attributes. In preparation for that, > document what is already there. > > Next, the PCI/TSM effort proposes samples/devsec/ as a reference and > test implementation of all the TSM infrastructure. It is implemented via > host bridge emulation and aims to be cross-architecture compatible. It > stumbled over the current state of PCI domain number emulation being > arch and driver specific. Remove some of that differentiation and unify > the existing x86 host bridge emulators (hyper-v and vmd) on a common > pci_bus_find_emul_domain_nr() helper. > > Dan Williams (3): > PCI: Establish document for PCI host bridge sysfs attributes > PCI: Enable host bridge emulation for PCI_DOMAINS_GENERIC platforms > PCI: vmd: Switch to pci_bus_find_emul_domain_nr() > > .../ABI/testing/sysfs-devices-pci-host-bridge | 19 +++++++ > MAINTAINERS | 1 + > drivers/pci/controller/pci-hyperv.c | 53 ++----------------- > drivers/pci/controller/vmd.c | 33 ++++-------- > drivers/pci/pci.c | 43 ++++++++++++++- > drivers/pci/probe.c | 8 ++- > include/linux/pci.h | 4 ++ > 7 files changed, 86 insertions(+), 75 deletions(-) > create mode 100644 Documentation/ABI/testing/sysfs-devices-pci-host-bridge Seems OK to me, modulo the conversation with Michael. Would like a Reviewed-by from the owners of pci-hyperv.c and vmd.c, of course. Bjorn
