From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD7A0C432C3 for ; Fri, 22 Nov 2019 03:43:59 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A7E9820704 for ; Fri, 22 Nov 2019 03:43:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=gibson.dropbear.id.au header.i=@gibson.dropbear.id.au header.b="Feu/i654" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A7E9820704 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=gibson.dropbear.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:47154 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iXzrQ-0006Oh-Vg for qemu-devel@archiver.kernel.org; Thu, 21 Nov 2019 22:43:58 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:55343) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iXzpq-0004W2-Pm for qemu-devel@nongnu.org; Thu, 21 Nov 2019 22:42:20 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iXzpp-0004VT-3c for qemu-devel@nongnu.org; Thu, 21 Nov 2019 22:42:18 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:51115 helo=ozlabs.org) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iXzpn-0004Th-VT; Thu, 21 Nov 2019 22:42:17 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 47K2LC0QMCz9sPf; Fri, 22 Nov 2019 14:42:10 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1574394131; bh=qO9Bxjy8w9u35cUaEH5/nGa86TwN+seOjzrgB5r8jG8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Feu/i654QXHYlZ7mMYvojS6lQJv9WYTru5OQy/8h9/h+iJm2xY+tR4Id4kRcw4yZm ymsiZz4jNkAZ9PNUkIxINM3htDatE7Uz18AihirNXX4B61XzP1mVdc32HZdBH52HyJ a3WfR3Pj2mIA7vFRH5S8WfN6R5lcnUdCkyFlkx/E= Date: Fri, 22 Nov 2019 14:41:28 +1100 From: David Gibson To: =?iso-8859-1?Q?C=E9dric?= Le Goater Subject: Re: [PATCH v2] ppc/pnv: Create BMC devices at machine init Message-ID: <20191122034128.GC5582@umbus.fritz.box> References: <20191121162340.11049-1-clg@kaod.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="E9BSeqwf+/eWbDe5" Content-Disposition: inline In-Reply-To: <20191121162340.11049-1-clg@kaod.org> User-Agent: Mutt/1.12.1 (2019-06-15) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 203.11.71.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: qemu-ppc@nongnu.org, Corey Minyard , Oliver O'Halloran , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" --E9BSeqwf+/eWbDe5 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 21, 2019 at 05:23:40PM +0100, C=E9dric Le Goater wrote: > The BMC of the OpenPOWER systems monitors the machine state using > sensors, controls the power and controls the access to the PNOR flash > device containing the firmware image required to boot the host. >=20 > QEMU models the power cycle process, access to the sensors and access > to the PNOR device. But, for these features to be available, the QEMU > PowerNV machine needs two extras devices on the command line, an IPMI > BT device for communication and a BMC backend device: >=20 > -device ipmi-bmc-sim,id=3Dbmc0 -device isa-ipmi-bt,bmc=3Dbmc0,irq=3D10 >=20 > The BMC properties are then defined accordingly in the device tree and > OPAL self adapts. If a BMC device and an IPMI BT device are not > available, OPAL does not try to communicate with the BMC in any > manner. This is not how real systems behave. >=20 > To be closer to the default behavior, create an IPMI BMC simulator > device and an IPMI BT device at machine initialization time. We loose > the ability to define an external BMC device but there are benefits: >=20 > - a better match with real systems, > - a better test coverage of the OPAL code, > - system powerdown and reset commands that work, > - a QEMU device tree compliant with the specifications (*). >=20 > (*) Still needs a MBOX device. >=20 > Signed-off-by: C=E9dric Le Goater Applied to ppc-for-5.0. > --- >=20 > Changes since v1: >=20 > - renamed ipmi_bt_init() to pnv_ipmi_bt_init() >=20 > include/hw/ppc/pnv.h | 2 +- > hw/ppc/pnv.c | 33 ++++++++++++++++----------------- > hw/ppc/pnv_bmc.c | 20 +++++++++++++++++--- > 3 files changed, 34 insertions(+), 21 deletions(-) >=20 > diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h > index 07c56c05ad30..90f1343ed07c 100644 > --- a/include/hw/ppc/pnv.h > +++ b/include/hw/ppc/pnv.h > @@ -198,7 +198,7 @@ static inline bool pnv_is_power9(PnvMachineState *pnv) > */ > void pnv_dt_bmc_sensors(IPMIBmc *bmc, void *fdt); > void pnv_bmc_powerdown(IPMIBmc *bmc); > -int pnv_bmc_hiomap(IPMIBmc *bmc); > +IPMIBmc *pnv_bmc_create(void); > =20 > /* > * POWER8 MMIO base addresses > diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c > index c3ac0d6d5b4a..f0adb06c8d65 100644 > --- a/hw/ppc/pnv.c > +++ b/hw/ppc/pnv.c > @@ -551,27 +551,10 @@ static void pnv_powerdown_notify(Notifier *n, void = *opaque) > =20 > static void pnv_reset(MachineState *machine) > { > - PnvMachineState *pnv =3D PNV_MACHINE(machine); > void *fdt; > - Object *obj; > =20 > qemu_devices_reset(); > =20 > - /* > - * OpenPOWER systems have a BMC, which can be defined on the > - * command line with: > - * > - * -device ipmi-bmc-sim,id=3Dbmc0 > - * > - * This is the internal simulator but it could also be an external > - * BMC. > - */ > - obj =3D object_resolve_path_type("", "ipmi-bmc-sim", NULL); > - if (obj) { > - pnv->bmc =3D IPMI_BMC(obj); > - pnv_bmc_hiomap(pnv->bmc); > - } > - > fdt =3D pnv_dt_create(machine); > =20 > /* Pack resulting tree */ > @@ -629,6 +612,16 @@ static bool pnv_match_cpu(const char *default_type, = const char *cpu_type) > return ppc_default->pvr_match(ppc_default, ppc->pvr); > } > =20 > +static void pnv_ipmi_bt_init(ISABus *bus, IPMIBmc *bmc, uint32_t irq) > +{ > + Object *obj; > + > + obj =3D OBJECT(isa_create(bus, "isa-ipmi-bt")); > + object_property_set_link(obj, OBJECT(bmc), "bmc", &error_fatal); > + object_property_set_int(obj, irq, "irq", &error_fatal); > + object_property_set_bool(obj, true, "realized", &error_fatal); > +} > + > static void pnv_init(MachineState *machine) > { > PnvMachineState *pnv =3D PNV_MACHINE(machine); > @@ -751,6 +744,9 @@ static void pnv_init(MachineState *machine) > } > g_free(chip_typename); > =20 > + /* Create the machine BMC simulator */ > + pnv->bmc =3D pnv_bmc_create(); > + > /* Instantiate ISA bus on chip 0 */ > pnv->isa_bus =3D pnv_isa_create(pnv->chips[0], &error_fatal); > =20 > @@ -760,6 +756,9 @@ static void pnv_init(MachineState *machine) > /* Create an RTC ISA device too */ > mc146818_rtc_init(pnv->isa_bus, 2000, NULL); > =20 > + /* Create the IPMI BT device for communication with the BMC */ > + pnv_ipmi_bt_init(pnv->isa_bus, pnv->bmc, 10); > + > /* > * OpenPOWER systems use a IPMI SEL Event message to notify the > * host to powerdown > diff --git a/hw/ppc/pnv_bmc.c b/hw/ppc/pnv_bmc.c > index aa5c89586c63..07fa1e1c7e45 100644 > --- a/hw/ppc/pnv_bmc.c > +++ b/hw/ppc/pnv_bmc.c > @@ -17,6 +17,8 @@ > */ > =20 > #include "qemu/osdep.h" > +#include "qemu-common.h" > +#include "qapi/error.h" > #include "target/ppc/cpu.h" > #include "qemu/log.h" > #include "hw/ipmi/ipmi.h" > @@ -211,8 +213,20 @@ static const IPMINetfn hiomap_netfn =3D { > .cmd_handlers =3D hiomap_cmds > }; > =20 > -int pnv_bmc_hiomap(IPMIBmc *bmc) > +/* > + * Instantiate the machine BMC. PowerNV uses the QEMU internal > + * simulator but it could also be external. > + */ > +IPMIBmc *pnv_bmc_create(void) > { > - return ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(bmc), > - IPMI_NETFN_OEM, &hiomap_netfn); > + Object *obj; > + > + obj =3D object_new(TYPE_IPMI_BMC_SIMULATOR); > + object_property_set_bool(obj, true, "realized", &error_fatal); > + > + /* Install the HIOMAP protocol handlers to access the PNOR */ > + ipmi_sim_register_netfn(IPMI_BMC_SIMULATOR(obj), IPMI_NETFN_OEM, > + &hiomap_netfn); > + > + return IPMI_BMC(obj); > } --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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