tree 8fb30cb3ae36af4051a15debd2d04acfba4085ae
parent 379dd2dfecf1a0c06adf0f6e257a5ebc75374cb8
author Peter Fang <peter.fang@intel.corp-partner.google.com> 1657785671 -0700
committer crosvm LUCI <crosvm-scoped@luci-project-accounts.iam.gserviceaccount.com> 1660735234 +0000

devices: vfio_pci: identify intel-lpss devices via cmdline

intel-lpss devices need special handling during BAR accesses due to PV
operations in the guest (when compiled with the direct feature). Allow
identification of such devices via a new vfio parameter, intel-lpss, so
that it can tag them for PV handling.

BUG=b:232887201
TEST=crosvm accepts the intel-lpss parameter in --vfio

Change-Id: I6ce710b112e7d286e43014d7dc55ec4e68939731
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3764936
Tested-by: Peter Fang <peter.fang@intel.corp-partner.google.com>
Commit-Queue: Tomasz Nowicki <tnowicki@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>