From 18372181079e7b22cdbcc79c97a526d07d72f30c Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Thu, 25 Jun 2015 13:44:31 +0200 Subject: [PATCH 006/100] spapr_rtas: add get-sensor-state RTAS interface Message-id: <1435239881-28541-5-git-send-email-lvivier@redhat.com> Patchwork-id: 66484 O-Subject: [RHEL7.2 qemu-kvm-rhev PATCH 04/14] spapr_rtas: add get-sensor-state RTAS interface Bugzilla: 1172478 RH-Acked-by: Michael S. Tsirkin RH-Acked-by: Thomas Huth RH-Acked-by: David Gibson From: Mike Day 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 Signed-off-by: Michael Roth Reviewed-by: David Gibson Signed-off-by: David Gibson Signed-off-by: Alexander Graf (cherry picked from commit 886445a6ee808ee06533f9ecdf0f169c9ea83fbb) Signed-off-by: Laurent Vivier Signed-off-by: Miroslav Rezanina --- hw/ppc/spapr_rtas.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) 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) -- 1.8.3.1