From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39502) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yo4eA-0008NS-Bb for qemu-devel@nongnu.org; Fri, 01 May 2015 02:42:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yo4e6-0001Ih-Gn for qemu-devel@nongnu.org; Fri, 01 May 2015 02:42:02 -0400 From: David Gibson Date: Fri, 1 May 2015 16:41:38 +1000 Message-Id: <1430462510-14195-21-git-send-email-david@gibson.dropbear.id.au> In-Reply-To: <1430462510-14195-1-git-send-email-david@gibson.dropbear.id.au> References: <1430462510-14195-1-git-send-email-david@gibson.dropbear.id.au> Subject: [Qemu-devel] [PATCH 20/32] spapr_rtas: add get-sensor-state RTAS interface List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: agraf@suse.de Cc: qemu-devel@nongnu.org, mdroth@linux.vnet.ibm.com, Mike Day , qemu-ppc@nongnu.org, afaerber@suse.de, 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 --- 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) -- 2.1.0