drm/xe/vf: Don't touch GuC irq registers if using memory irqs

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@intel.com>
Cc: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240617154736.685-1-michal.wajdeczko@intel.com
(cherry picked from commit f0ccd2d805e55e12b430d5d6b9acd9f891af455e)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_guc.c b/drivers/gpu/drm/xe/xe_guc.c
index 240e7a4bbff1a9e31b2c9d9bb12a5fc8fd012ee2..5faca4fc2fef5aa9e860636570237cc8e0902933 100644 (file)
--- a/drivers/gpu/drm/xe/xe_guc.c
+++ b/drivers/gpu/drm/xe/xe_guc.c
@@ -631,8 +631,6 @@ 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);
@@ -640,6 +638,8 @@ 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,