[Qemu-devel] [PATCH target-arm v5 00/10] Fix Support for ARM CBAR and reset-hivecs

[Peter Crosthwaite]

Hi All,

This patch series adds support for two board configurable ARM CPU
properties - Configuration Base Address Register and the
hivecs-on-reset.

The CBAR is needed to fix Zynq and Highbank which both were broken for
linux boot. This series provides the fixes.

I have added these properties as qdev properties rather than object
properties to pick up the desired writable-until-realize semantic.

To test the semantics of these new qdev properties I hacked Highbank
to illegally set the property after realize:

diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c
index c75b425..905483d 100644
--- a/hw/arm/highbank.c
+++ b/hw/arm/highbank.c
@@ -236,13 +236,13 @@ static void calxeda_init(QEMUMachineInitArgs
*args, enum cxmachines machine)

         cpu = ARM_CPU(object_new(object_class_get_name(oc)));

-        object_property_set_int(OBJECT(cpu), MPCORE_PERIPHBASE, "reset-cbar",
-                                &err);
+        object_property_set_bool(OBJECT(cpu), true, "realized", &err);
         if (err) {
             error_report("%s", error_get_pretty(err));
             exit(1);
         }
-        object_property_set_bool(OBJECT(cpu), true, "realized", &err);
+        object_property_set_int(OBJECT(cpu), MPCORE_PERIPHBASE, "reset-cbar",
+                                &err);
         if (err) {
             error_report("%s", error_get_pretty(err));
             exit(1);

Booting with this bug I now get:

$ qemu-system-arm -M highbank ...
qemu-system-arm: Attempt to set property 'reset-cbar' on anonymous device (type 
'cortex-a9-arm-cpu') after it was realized

whereas the previous versions would have silent failed.

Regards,
Peter

changed since v4:
Reimplemented using qdev properties
dropped QOM patches
rebased against mainline
changed since v3:
Rebased against target-arm patch queue (2013/12/11)
Added Antonys reset hivecs patches
changed since v2:
Fixed comment in p8 (PMM review)
Enabled CBAR for a15 (PMM review)
Typo sweep
Changed since v1:
Fix QOM to support writeable dynamic properties
Use dynamic props instead (PMM/AF discussion)
Use error_report (AF reivew)
Use reset- prefix on propname (AF review)
Fix machine model namings or the MPCore PERIPHBASE


Antony Pavlov (2):
  ARM: cpu: add "reset_hivecs" property
  ARM: arm_cpu_reset: make it possible to use high vectors for reset_exc

Peter Crosthwaite (8):
  target-arm/helper.c: Allow cp15.c15 dummy override
  target-arm: Define and use ARM_FEATURE_CBAR
  target-arm/cpu: Convert reset CBAR to a property
  arm/highbank: Use object_new() rather than cpu_arm_init()
  arm/highbank: Fix CBAR initialisation
  arm/xilinx_zynq: Use object_new() rather than cpu_arm_init()
  arm/xilinx_zynq: Implement CBAR initialisation
  arm/highbank.c: Fix MPCore periphbase name

 hw/arm/highbank.c    | 33 +++++++++++++++++++++------------
 hw/arm/xilinx_zynq.c | 21 +++++++++++++++++----
 target-arm/cpu-qom.h |  1 +
 target-arm/cpu.c     | 47 ++++++++++++++++++++++++++++++++++++++---------
 target-arm/cpu.h     |  1 +
 target-arm/helper.c  | 12 +++++++++++-
 6 files changed, 89 insertions(+), 26 deletions(-)

-- 
1.8.5.1