[PATCH] drm/xe/gsc: Don't create mei-gscfi auxiliary device in a Guest VM

[Vivek Kasireddy]

While running in a Guest Virtual Machine (VM), we do not have to
initialize and enable the mei-gscfi auxiliary device. This is
because communication with the GSC/CSC firmware -- which is the
main purpose of the aux device -- is unlikely to work in the VM
environment, and can result in the following errors while loading
the Xe driver:

[  762.274208] mei_gsc xe.mei-gscfi.24: H_RST is not set = 0x00000000
[  764.299203] mei_gsc xe.mei-gscfi.24: wait hw ready failed
[  764.300334] mei_gsc xe.mei-gscfi.24: hw_start failed ret = -62 fw status = 00000000 00000000 00000000 00000000 00000000 00000000
[  768.333706] mei_gsc xe.mei-gscfi.24: reset: reached maximal consecutive resets: disabling the device
[  768.334466] mei_gsc xe.mei-gscfi.24: reset failed ret = -19
[  768.334941] mei_gsc xe.mei-gscfi.24: link layer initialization failed.
[  768.335346] mei_gsc xe.mei-gscfi.24: init hw failure.

Cc: Alexander Usyskin <alexander.usyskin at intel.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy at intel.com>
---
 drivers/gpu/drm/xe/xe_heci_gsc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_heci_gsc.c b/drivers/gpu/drm/xe/xe_heci_gsc.c
index 6d7b62724126..eb94fcb3f03b 100644
--- a/drivers/gpu/drm/xe/xe_heci_gsc.c
+++ b/drivers/gpu/drm/xe/xe_heci_gsc.c
@@ -13,6 +13,7 @@
 #include "xe_heci_gsc.h"
 #include "regs/xe_gsc_regs.h"
 #include "xe_platform_types.h"
+#include "xe_sriov.h"
 #include "xe_survivability_mode.h"
 
 #define GSC_BAR_LENGTH  0x00000FFC
@@ -176,6 +177,9 @@ int xe_heci_gsc_init(struct xe_device *xe)
 	if (!xe->info.has_heci_gscfi && !xe->info.has_heci_cscfi)
 		return 0;
 
+	if (IS_SRIOV_VF(xe))
+		return 0;
+
 	heci_gsc->irq = -1;
 
 	if (xe->info.platform == XE_BATTLEMAGE) {
-- 
2.49.0