vgsp-rm r623: oserrlog - deliver a synthetic OS_ERROR_LOG (0x1006) engine-fault report to the guest's RM queue (debug param; payload mirrors the GSP ABI decode: exceptType/runlistId/chid/errString/prevXid) - the suspected missing recovery half after a synth-fault (post-fault clients stick pre-submission)

1 files changed, 42 insertions, 0 deletions

diff --git a/kernel/gsp_rm_emulation.c b/kernel/gsp_rm_emulation.c
index 2a957b3..7011f77 100644
--- a/kernel/gsp_rm_emulation.c
+++ b/kernel/gsp_rm_emulation.c
@@ -926,6 +926,48 @@ int gsp_rm_post_channel_event(struct nv_vgpu_device *vgpu, u32 h_src)
 }
 
 /*
+ * r623 experiment: deliver a synthetic OS_ERROR_LOG (0x1006) record to the
+ * guest's RM queue - the error report a real GSP sends into the client's
+ * message queue when an engine faults. r618's synth-fault writes the channel
+ * notifier and posts a generic event; after it, the NEXT client stuck
+ * pre-submission (r620 atomics; r616b saxpy/math). If the guest's fault
+ * handling marks the device recoverable only when the 0x1006 report arrives,
+ * this record is the missing half. Payload mirrors the GSP ABI decode in
+ * gsp_phys_booter.c (GSP_PHYS_OSERR_OFF_*): exceptType u32, runlistId u32,
+ * chid u32, errString[256], prevXid u32. Manual/debug only.
+ */
+int gsp_rm_send_os_error_log(struct nv_vgpu_device *vgpu, u32 except_type,
+			     u32 runlist_id, u32 chid, const char *engine)
+{
+	struct gsp_emu_context *ctx = vgpu ? vgpu->gsp_comm_ctx : NULL;
+	struct gsp_rm_emu *rm;
+	u8 payload[272] = {0};
+	int rc;
+
+	if (!ctx)
+		return -ENODEV;
+	rm = ctx->rm_emu;
+	if (!rm || !rm->parsed)
+		return -EAGAIN;
+
+	memcpy(payload + 0, &except_type, 4);
+	memcpy(payload + 4, &runlist_id, 4);
+	memcpy(payload + 8, &chid, 4);
+	snprintf((char *)payload + 12, 255, "ENGINE %s",
+		 engine && *engine ? engine : "GR");
+	/* prevXid stays 0 */
+
+	rc = gsp_rm_send(ctx, 0x1006, (u32)rm->stat_seq + 1, 0, payload,
+			 sizeof(payload));
+	if (!rc)
+		nv_vgpu_info(vgpu,
+			     "vgsp-rm: OS_ERROR_LOG sent (synthetic) except=0x%x rl=%u chid=%u engine=%s\n",
+			     except_type, runlist_id, chid,
+			     engine && *engine ? engine : "GR");
+	return rc;
+}
+
+/*
  * Debug: post the event record for one registered event (or all of them with
  * idx 0xffffffff). Used to test the guest's event path on demand without
  * waiting for a channel submission.