This is a note to let you know that I've just added the patch titled
drm/xe/vf: Don't touch GuC irq registers if using memory irqs
to the 6.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-xe-vf-don-t-touch-guc-irq-registers-if-using-mem.patch
and it can be found in the queue-6.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3f499f574a42151dbb62ec059ae2720e94036411
Author: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Date: Mon Jun 17 17:47:36 2024 +0200
drm/xe/vf: Don't touch GuC irq registers if using memory irqs
[ Upstream commit d21d44dbdde83c4a8553c95de1853e63e88d7954 ]
On platforms where VFs are using memory based interrupts, we
missed invalid access to no longer existing interrupt registers,
as we keep them marked with XE_REG_OPTION_VF. To fix that just
either setup memirq vectors in GuC or enable legacy interrupts.
Fixes: aef4eb7c7dec ("drm/xe/vf: Setup memory based interrupts in GuC")
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240617154736.685-1-michal.wajdeczko@xxxxxxxxx
(cherry picked from commit f0ccd2d805e55e12b430d5d6b9acd9f891af455e)
Signed-off-by: Thomas Hellström <thomas.hellstrom@xxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 0d2a2dd13f112..a38f59b4356d4 100644
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -643,8 +643,6 @@ int xe_guc_enable_communication(struct xe_guc *guc)
struct xe_device *xe = guc_to_xe(guc);
int err;
- guc_enable_irq(guc);
-
if (IS_SRIOV_VF(xe) && xe_device_has_memirq(xe)) {
struct xe_gt *gt = guc_to_gt(guc);
struct xe_tile *tile = gt_to_tile(gt);
@@ -652,6 +650,8 @@ int xe_guc_enable_communication(struct xe_guc *guc)
err = xe_memirq_init_guc(&tile->sriov.vf.memirq, guc);
if (err)
return err;
+ } else {
+ guc_enable_irq(guc);
}
xe_mmio_rmw32(guc_to_gt(guc), PMINTRMSK,
