Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/xe/vf: Reset VF GuC state on fini
Unlike native/PF driver, which was explicitly triggering full GuC
reset during driver unwind, the VF driver was not notifying GuC that
it is about to unwind, and this could lead GuC to access stale data,
which in turn could be interpreted as VF's malicious activity.
Add managed action to send to GuC VF_RESET message during GT unwind.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patch.msgid.link/20260122151924.3726-1-michal.wajdeczko@intel.com
+11
+11
drivers/gpu/drm/xe/xe_guc.c
+11
drivers/gpu/drm/xe/xe_guc.c
···
668
668
guc_g2g_fini(guc);
669
669
}
670
670
671
+
static void vf_guc_fini_hw(void *arg)
672
+
{
673
+
struct xe_guc *guc = arg;
674
+
675
+
xe_gt_sriov_vf_reset(guc_to_gt(guc));
676
+
}
677
+
671
678
/**
672
679
* xe_guc_comm_init_early - early initialization of GuC communication
673
680
* @guc: the &xe_guc to initialize
···
779
772
xe->info.has_page_reclaim_hw_assist = false;
780
773
781
774
if (IS_SRIOV_VF(xe)) {
775
+
ret = devm_add_action_or_reset(xe->drm.dev, vf_guc_fini_hw, guc);
776
+
if (ret)
777
+
goto out;
778
+
782
779
ret = xe_guc_ct_init(&guc->ct);
783
780
if (ret)
784
781
goto out;