From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39455) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yo4e9-0008LT-BG 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 1Yo4e5-0001I6-Or for qemu-devel@nongnu.org; Fri, 01 May 2015 02:42:01 -0400 From: David Gibson Date: Fri, 1 May 2015 16:41:36 +1000 Message-Id: <1430462510-14195-19-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 18/32] spapr_rtas: add get/set-power-level RTAS interfaces 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, qemu-ppc@nongnu.org, Nathan Fontenot , afaerber@suse.de, David Gibson From: Nathan Fontenot These interfaces manage the power domains that guest devices are assigned to and are used to power on/off devices. Currently we only utilize 1 power domain, the 'live-insertion' domain, which automates power management of plugged/unplugged devices, essentially making these calls no-ops, but the RTAS interfaces are still required by guest hotplug code and PAPR+. See docs/specs/ppc-spapr-hotplug.txt for a complete description of these interfaces. Signed-off-by: Nathan Fontenot Signed-off-by: Michael Roth Reviewed-by: David Gibson Signed-off-by: David Gibson --- hw/ppc/spapr_rtas.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 0f1ae55..d7694cd 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -245,6 +245,56 @@ static void rtas_ibm_os_term(PowerPCCPU *cpu, rtas_st(rets, 0, ret); } +static void rtas_set_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, uint32_t nret, + target_ulong rets) +{ + int32_t power_domain; + + if (nargs != 2 || nret != 2) { + rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); + return; + } + + /* we currently only use a single, "live insert" powerdomain for + * hotplugged/dlpar'd resources, so the power is always live/full (100) + */ + power_domain = rtas_ld(args, 0); + if (power_domain != -1) { + rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); + return; + } + + rtas_st(rets, 0, RTAS_OUT_SUCCESS); + rtas_st(rets, 1, 100); +} + +static void rtas_get_power_level(PowerPCCPU *cpu, sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, uint32_t nret, + target_ulong rets) +{ + int32_t power_domain; + + if (nargs != 1 || nret != 2) { + rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); + return; + } + + /* we currently only use a single, "live insert" powerdomain for + * hotplugged/dlpar'd resources, so the power is always live/full (100) + */ + power_domain = rtas_ld(args, 0); + if (power_domain != -1) { + rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED); + return; + } + + rtas_st(rets, 0, RTAS_OUT_SUCCESS); + rtas_st(rets, 1, 100); +} + static struct rtas_call { const char *name; spapr_rtas_fn fn; @@ -370,6 +420,10 @@ static void core_rtas_register_types(void) rtas_ibm_set_system_parameter); spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term", rtas_ibm_os_term); + spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level", + rtas_set_power_level); + spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", + rtas_get_power_level); } type_init(core_rtas_register_types) -- 2.1.0