ppc/xive2: Add undelivered group interrupt to backlog

When a group interrupt cannot be delivered, we need to:
- increment the backlog counter for the group in the NVG table
  (if the END is configured to keep a backlog).
- start a broadcast operation to set the LSMFB field on matching CPUs
  which can't take the interrupt now because they're running at too
  high a priority.

[npiggin: squash in fixes from milesg]
[milesg: only load the NVP if the END is !ignore]
[milesg: always broadcast backlog, not only when there are precluded VPs]

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Kowal <kowal@linux.ibm.com>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index e78adaffa5..6a410c6f1a 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -442,6 +442,9 @@ struct XivePresenterClass {
                      uint32_t logic_serv, XiveTCTXMatch *match);
     bool (*in_kernel)(const XivePresenter *xptr);
     uint32_t (*get_config)(XivePresenter *xptr);
+    int (*broadcast)(XivePresenter *xptr,
+                     uint8_t nvt_blk, uint32_t nvt_idx,
+                     uint8_t priority);
 };
 
 int xive_presenter_tctx_match(XivePresenter *xptr, XiveTCTX *tctx,
@@ -472,6 +475,8 @@ struct XiveFabricClass {
                      uint8_t nvt_blk, uint32_t nvt_idx,
                      bool cam_ignore, uint8_t priority,
                      uint32_t logic_serv, XiveTCTXMatch *match);
+    int (*broadcast)(XiveFabric *xfb, uint8_t nvt_blk, uint32_t nvt_idx,
+                     uint8_t priority);
 };
 
 /*