[PULL,05/10] ppc/spapr: Add FWNMI machine check delivery warnings
diff mbox series

Message ID 20200407043606.291546-6-david@gibson.dropbear.id.au
State New
Headers show
Series
  • [PULL,01/10] hw/ppc/e500.c: Handle qemu_find_file() failure
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Commit Message

David Gibson April 7, 2020, 4:36 a.m. UTC
From: Nicholas Piggin <npiggin@gmail.com>

Add some messages which explain problems and guest misbehaviour that
may be difficult to diagnose in rare cases of machine checks.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20200325142906.221248-4-npiggin@gmail.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr_events.c | 4 ++++
 hw/ppc/spapr_rtas.c   | 3 +++
 2 files changed, 7 insertions(+)

Patch
diff mbox series

diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
index a908c5d0e9..c8964eb25d 100644
--- a/hw/ppc/spapr_events.c
+++ b/hw/ppc/spapr_events.c
@@ -833,6 +833,8 @@  static void spapr_mce_dispatch_elog(PowerPCCPU *cpu, bool recovered)
     /* get rtas addr from fdt */
     rtas_addr = spapr_get_rtas_addr();
     if (!rtas_addr) {
+        error_report(
+"FWNMI: Unable to deliver machine check to guest: rtas_addr not found.");
         qemu_system_guest_panicked(NULL);
         g_free(ext_elog);
         return;
@@ -874,6 +876,8 @@  void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered)
          * that CPU called "ibm,nmi-interlock")
          */
         if (spapr->fwnmi_machine_check_interlock == cpu->vcpu_id) {
+            error_report(
+"FWNMI: Unable to deliver machine check to guest: nested machine check.");
             qemu_system_guest_panicked(NULL);
             return;
         }
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c
index 29abe66d01..bcac0d00e7 100644
--- a/hw/ppc/spapr_rtas.c
+++ b/hw/ppc/spapr_rtas.c
@@ -462,6 +462,9 @@  static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
     }
 
     if (spapr->fwnmi_machine_check_addr == -1) {
+        qemu_log_mask(LOG_GUEST_ERROR,
+"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
+
         /* NMI register not called */
         rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
         return;