--- v3
+++ v1
@@ -1,34 +1,61 @@
 This patchset allows for setup_rfi_flush() to be called again
-after PowerVM LPM (live partition mobility) aka LPAR migration,
-in order to possibly switch to a different flush method.
+after PowerVM LPM (live partition mobility) aka LPAR migration.
 
-The patches are mostly from Michael Ellerman, I have rebased to
-powerpc/linux.git merge branch as of commit d8443ef (March 14).
+It's originally written by Michael Ellerman; I just rebased it
+on top of powerpc/merge as of 2018-02-14 BRST (commit 3f6f556).
 
-Testcase and results sent as the last email in the series.
+I tested it with a debug patch (sending shortly) to shortcut
+the LPM functions migration_store() and post_mobility_fixup()
+to just reach pseries_setup_rfi_flush(), and abuse the boot
+option 'no_rfi_flush' not to allocate the fallback flush area
+at boot (to simulate the migration from patched to unpatched
+system).
 
-v3: add patch 4 to tell flush types are 'available' and not 'Using'.
-    remove plumbing patch.
+Testing:
+-------
 
-v2: add plumbing patch between platforms and setup code to
-    force init fallback flush.
+Fallback flush area allocated at boot time:
 
-Mauricio Faria de Oliveira (1):
-  rfi-flush: Differentiate enabled and patched flush types
+    # dmesg | grep rfi-flush
+    [    0.000000] rfi-flush: Using fallback displacement flush
+    [    0.000000] rfi-flush: patched 8 locations
 
-Michael Ellerman (4):
+    # echo > /sys/kernel/mobility/migration 
+
+    # dmesg | grep rfi-flush
+    [    0.000000] rfi-flush: Using fallback displacement flush
+    [    0.000000] rfi-flush: patched 8 locations
+    [   51.793238] rfi-flush: Using fallback displacement flush
+    [   51.793258] rfi-flush: patched 8 locations
+
+Fallback flush area NOT allocated at boot time:
+
+    # grep -o no_rfi_flush /proc/cmdline
+    no_rfi_flush
+    
+    # dmesg | grep rfi-flush
+    [    0.000000] rfi-flush: disabled on command line.
+    [    0.000000] rfi-flush: re-enabled
+
+    # echo > /sys/kernel/mobility/migration 
+
+    # dmesg | grep rfi-flush
+    [    0.000000] rfi-flush: disabled on command line.
+    [    0.000000] rfi-flush: re-enabled
+    [   31.817921] rfi-flush: Error unable to use fallback displacement flush!
+    [   31.817927] rfi-flush: patched 8 locations
+
+Michael Ellerman (3):
   rfi-flush: Move the logic to avoid a redo into the debugfs code
   rfi-flush: Make it possible to call setup_rfi_flush() again
-  rfi-flush: Always enable fallback flush on pseries
   rfi-flush: Call setup_rfi_flush() after LPM migration
 
  arch/powerpc/include/asm/setup.h          |  2 +-
- arch/powerpc/kernel/setup_64.c            | 25 ++++++++++++++++---------
- arch/powerpc/lib/feature-fixups.c         |  9 ++++++++-
+ arch/powerpc/kernel/setup_64.c            | 38 +++++++++++++++++++++++--------
  arch/powerpc/platforms/pseries/mobility.c |  3 +++
  arch/powerpc/platforms/pseries/pseries.h  |  2 ++
- arch/powerpc/platforms/pseries/setup.c    | 12 ++----------
- 6 files changed, 32 insertions(+), 21 deletions(-)
+ arch/powerpc/platforms/pseries/setup.c    |  2 +-
+ 5 files changed, 36 insertions(+), 11 deletions(-)
 
 -- 
 2.7.4