summaryrefslogtreecommitdiff
path: root/scripts/gdb/linux/pgtable.py
diff options
context:
space:
mode:
authorKeith Busch <kbusch@kernel.org>2024-10-25 15:27:54 -0700
committerBjorn Helgaas <bhelgaas@google.com>2024-11-13 16:43:34 -0600
commit2fa046449a82a7d0f6d9721dd83e348816038444 (patch)
treea0fd994dd816d1da3e5f6ad0f0c30fff194d9e3f /scripts/gdb/linux/pgtable.py
parent9852d85ec9d492ebef56dc5f229416c925758edc (diff)
PCI: Add 'reset_subordinate' to reset hierarchy below bridge
The "bus" and "cxl_bus" reset methods reset a device by asserting Secondary Bus Reset on the bridge leading to the device. These only work if the device is the only device below the bridge. Add a sysfs 'reset_subordinate' attribute on bridges that can assert Secondary Bus Reset regardless of how many devices are below the bridge. This resets all the devices below a bridge in a single command, including the locking and config space save/restore that reset methods normally do. This may be the only way to reset devices that don't support other reset methods (ACPI, FLR, PM reset, etc). Link: https://lore.kernel.org/r/20241025222755.3756162-1-kbusch@meta.com Signed-off-by: Keith Busch <kbusch@kernel.org> [bhelgaas: commit log, add capable(CAP_SYS_ADMIN) check] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Amey Narkhede <ameynarkhede03@gmail.com>
Diffstat (limited to 'scripts/gdb/linux/pgtable.py')
0 files changed, 0 insertions, 0 deletions