PCI: vmd: Only copy root bridge _OSC control flags in bare metal OS

Browse source

Only in a bare metal OS environment, the _OSC control flags like Hotplug,
PME, AER, etc. reflect the physical root bridge capabilities. But in a VM
environment, these flags reflect the hypervisor policy and in most cases,
the hypervisor disables all of these control flags to the guest.

So copying these flags would needlessly disable these features in the VMD
owned Root Ports. Hence, copy the flags only when VMD is running in a bare
metal OS environment.

Signed-off-by: Nirmal Patel <nirmal.patel@linux.intel.com>
[mani: commit log and comment rewording]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20260713220844.561357-1-nirmal.patel@intel.com

...

This commit is contained in:

Nirmal Patel 2026-07-13 22:08:44 +00:00 • committed by Manivannan Sadhasivam

parent 72b32eccbc

commit 2162572d34

1 changed files with 12 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

16

drivers/pci/controller/vmd.c

View file