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author | Mike Day <ncmike@ncultra.org> | 2015-05-07 15:33:46 +1000 |
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committer | Alexander Graf <agraf@suse.de> | 2015-06-03 23:56:53 +0200 |
commit | 886445a6ee808ee06533f9ecdf0f169c9ea83fbb (patch) | |
tree | 8b8db4c1946af876e1f1c36c34a32e222563caac /hw/ppc | |
parent | 8c8639df32f19d5ca9bf6a823ac83e298a188fd1 (diff) | |
download | qemu-886445a6ee808ee06533f9ecdf0f169c9ea83fbb.zip qemu-886445a6ee808ee06533f9ecdf0f169c9ea83fbb.tar.gz qemu-886445a6ee808ee06533f9ecdf0f169c9ea83fbb.tar.bz2 |
spapr_rtas: add get-sensor-state RTAS interface
This interface allows a guest to read various platform/device sensors.
initially, we only implement support necessary to support hotplug:
reading of the dr-entity-sense sensor, which communicates the state of
a hotplugged resource/device to the guest (EMPTY/PRESENT/UNUSABLE).
See docs/specs/ppc-spapr-hotplug.txt for a complete description of
this interface.
Signed-off-by: Mike Day <ncmike@ncultra.org>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw/ppc')
-rw-r--r-- | hw/ppc/spapr_rtas.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 6c741fa..f80beb2 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -377,6 +377,47 @@ out_unimplemented: rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); } +static void rtas_get_sensor_state(PowerPCCPU *cpu, sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, uint32_t nret, + target_ulong rets) +{ + uint32_t sensor_type; + uint32_t sensor_index; + sPAPRDRConnector *drc; + sPAPRDRConnectorClass *drck; + uint32_t entity_sense; + + if (nargs != 2 || nret != 2) { + rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); + return; + } + + sensor_type = rtas_ld(args, 0); + sensor_index = rtas_ld(args, 1); + + if (sensor_type != RTAS_SENSOR_TYPE_ENTITY_SENSE) { + /* currently only DR-related sensors are implemented */ + DPRINTF("rtas_get_sensor_state: sensor/indicator not implemented: %d\n", + sensor_type); + rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); + return; + } + + drc = spapr_dr_connector_by_index(sensor_index); + if (!drc) { + DPRINTF("rtas_get_sensor_state: invalid sensor/DRC index: %xh\n", + sensor_index); + rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); + return; + } + drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); + entity_sense = drck->entity_sense(drc); + + rtas_st(rets, 0, RTAS_OUT_SUCCESS); + rtas_st(rets, 1, entity_sense); +} + static struct rtas_call { const char *name; spapr_rtas_fn fn; @@ -508,6 +549,8 @@ static void core_rtas_register_types(void) rtas_get_power_level); spapr_rtas_register(RTAS_SET_INDICATOR, "set-indicator", rtas_set_indicator); + spapr_rtas_register(RTAS_GET_SENSOR_STATE, "get-sensor-state", + rtas_get_sensor_state); } type_init(core_rtas_register_types) |