From nobody Sat Apr 11 21:27:42 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=reject dis=none) header.from=linux.ibm.com ARC-Seal: i=1; a=rsa-sha256; t=1773146856; cv=none; d=zohomail.com; s=zohoarc; b=hcOM4zl9sdRzTNrWRSEPKwogZiASBKE2krY8KQNkvZLyDjYzwXsXM9L657SpYza73Eqpz9ySN+J3YgQP+NCrJsNym7Ej0NPXRBm9Wu/qIqO/miBqu51F+nI54esTXVUm43S48TsMNJrwslDoe0HW/fcBoUcnXtjOm2PYP3lH6aQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1773146856; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=RUuZaIl2BO9hgmx/SSQppSlppQtAun4qakBW8cld8yA=; b=FE1dAGGp6gqEh4ZBA0fNrINZmYvrMue0PMIEPOS4+L7SsHjSZOFflk8917awV9QpTGBOHAUZfoBrSA73m/NxeG0/nx7NWQLAtrEBxeosEurXyNxMTFRLT8dlfMrreYTQ5wNi7Gqv7Ce9Yj1j9SlndzB9W5dTly/H4ghD8JPoj8c= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1773146856381598.6975517366727; Tue, 10 Mar 2026 05:47:36 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1vzwUO-00055L-NK; Tue, 10 Mar 2026 08:47:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vzwTx-000515-PF; Tue, 10 Mar 2026 08:46:43 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1vzwTw-00037p-44; Tue, 10 Mar 2026 08:46:41 -0400 Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 62A2FGiP553970; Tue, 10 Mar 2026 12:46:38 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4crd1mjg79-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 10 Mar 2026 12:46:37 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 62AAQ930029279; Tue, 10 Mar 2026 12:46:37 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4csp6unptx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 10 Mar 2026 12:46:37 +0000 Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 62ACkXYL10486174 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 10 Mar 2026 12:46:33 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 66B8820043; Tue, 10 Mar 2026 12:46:33 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0665120040; Tue, 10 Mar 2026 12:46:31 +0000 (GMT) Received: from li-3c92a0cc-27cf-11b2-a85c-b804d9ca68fa.in.ibm.com (unknown [9.109.199.210]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 10 Mar 2026 12:46:30 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=RUuZaIl2BO9hgmx/S SQppSlppQtAun4qakBW8cld8yA=; b=gXx6kKWvRm264aCzlhLkgiNvigaMLI7S8 53yUeuOOUqQasSpa0zMYcyUmuSRGUL1FaJ5UICi0N7OZgsZqjXeuogv5EBUxhn4w gJfw2opDsxwuowPrTB4TD1pw2DPM/kxhMkNCYH6tA3J9T9U2SP9rtok+otS+krvf 3EatmZJV3UW244Ins620oCPo/bPZ4w1oSOrJ3gkdPwKA2KAT2aZsrF3/I63Me+Cn VztkmLLaF4Uk1fGs/5pLuVR/9BqF9SncvcCDNUty/ww0OatlFjoVH6e+iXreKQla 05kBYEnFlbSvktrh2/TvmdxQNMKtdpvJQI4cC3CIPFqMHg2mCUV0g== From: Aditya Gupta To: Cc: , Hari Bathini , Sourabh Jain , Harsh Prateek Bora , Nicholas Piggin , Miles Glenn , Chinmay Rath , Shivang Upadhyay Subject: [PATCH v5 03/10] ppc/pnv: Handle stash command in PowerNV SBE Date: Tue, 10 Mar 2026 18:16:10 +0530 Message-ID: <20260310124619.3909045-4-adityag@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260310124619.3909045-1-adityag@linux.ibm.com> References: <20260310124619.3909045-1-adityag@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=ds3Wylg4 c=1 sm=1 tr=0 ts=69b012ae cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=pGLkceISAAAA:8 a=rjUXpLR2p4wDE8UIozkA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzEwMDEwOSBTYWx0ZWRfX6sh0sJYZ9MW5 6p7HQ0SpGCUOUiR6RM4mzgJcqoLkXYWoNKy9rv2YlEmfHGkkamqNSOuFw2plJXw7AFUjcw4f8KC o1nsMqjkepQn5uwGbZBBwSCrvlzhi1nuST6MrQ6tMVDgkS7d67sBull1fa2WJYwtZaA06A4h70w 0Z709SOtfQeYHCfPHE8TJlYWUK3jx3NJif9fpl+VNkaDxUVdcXO/9GX0BXSWu6JPeGpXME4qJzd VVID245PB/fSX36u4sQZwCtnprkdaTSlF8i7JMWom0gp3fvi41CdJbqqWx2cRo+TC/TWJ8g2NvL sjxgRZGiINS5WIIZESpchhvIqv/qvsr2q4a5tCwrMdmPsX3IVr1by3EYahWa8lSXQnzBeJfAjw1 4ospd+5u15PROYg16UZnBdDLolXjgP2pSuk+VjSqEkPGewwFDlMwnU5uio4wFY2lPqOsfy2YhIW MTS3c+a65l9gk2usbjg== X-Proofpoint-GUID: jO6WdJehgmlJlhkdhBD_TyZlGjBvHCg8 X-Proofpoint-ORIG-GUID: 0qx8BC-_MpatZozhcyxQPGgp2IN8uYZ4 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-10_02,2026-03-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 clxscore=1015 impostorscore=0 suspectscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 adultscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603100109 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.158.5; envelope-from=adityag@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -9 X-Spam_score: -1.0 X-Spam_bar: - X-Spam_report: (-1.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.819, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.903, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1773146858023154100 Content-Type: text/plain; charset="utf-8" Earlier since the SBE_CMD_STASH_MPIPL_CONFIG command was not handled, so skiboot used to not get any response from SBE: [ 106.350742821,3] SBE: Message timeout [chip id =3D 0], cmd =3D d7, s= ubcmd =3D 7 [ 106.352067746,3] SBE: Failed to send stash MPIPL config [chip id =3D= 0x0, rc =3D 254] Fix this by handling the command in PowerNV SBE, and sending a response so skiboot knows SBE has handled the STASH command The stashed skiboot base is later used to access the relocated MDST/MDDT tables when MPIPL is implemented. The purpose of stashing relocated base address is explained in following skiboot commit: author Vasant Hegde Fri Jul 12 16:47:5= 1 2019 +0530 committer Oliver O'Halloran Thu Aug 15 17:53:39 2019= +1000 SBE: Send OPAL relocated base address to SBE OPAL relocates itself during boot. During memory preserving IPL hostb= oot needs to access relocated OPAL base address to get MDST, MDDT tables. Hence= send relocated base address to SBE via 'stash MPIPL config' chip-op. Durin= g next IPL SBE will send stashed data to hostboot... so that hostboot can ac= cess these data. Reviewed-by: Hari Bathini Signed-off-by: Aditya Gupta --- hw/ppc/pnv_sbe.c | 37 +++++++++++++++++++++++++++++++++++++ include/hw/ppc/pnv_mpipl.h | 3 +++ 2 files changed, 40 insertions(+) diff --git a/hw/ppc/pnv_sbe.c b/hw/ppc/pnv_sbe.c index 5a2b3342d199..46c5047f1c0a 100644 --- a/hw/ppc/pnv_sbe.c +++ b/hw/ppc/pnv_sbe.c @@ -233,8 +233,11 @@ static void sbe_timer(void *opaque) =20 static void do_sbe_msg(PnvSBE *sbe) { + PnvMachineState *pnv =3D PNV_MACHINE(qdev_get_machine()); + MachineState *machine =3D MACHINE(pnv); struct sbe_msg msg; uint16_t cmd, ctrl_flags, seq_id; + uint64_t mbox_val; int i; =20 memset(&msg, 0, sizeof(msg)); @@ -265,6 +268,40 @@ static void do_sbe_msg(PnvSBE *sbe) timer_del(sbe->timer); } break; + case SBE_CMD_STASH_MPIPL_CONFIG: + /* key =3D sbe->mbox[1] */ + switch (sbe->mbox[1]) { + case SBE_STASH_KEY_SKIBOOT_BASE: + mbox_val =3D sbe->mbox[2]; + if (mbox_val >=3D machine->ram_size) { + qemu_log_mask(LOG_GUEST_ERROR, + "SBE: skiboot_base 0x%" PRIx64 " exceeds RAM size 0x%" P= RIx64 "\n", + mbox_val, machine->ram_size); + return; + } + + pnv->mpipl_state.skiboot_base =3D mbox_val; + qemu_log_mask(LOG_UNIMP, + "Stashing skiboot base: 0x%" HWADDR_PRIx "\n", + pnv->mpipl_state.skiboot_base); + + /* + * Set the response register. + * + * Currently setting the same sequence number in + * response as we got in the request. + */ + sbe->mbox[4] =3D sbe->mbox[0]; /* sequence number */ + pnv_sbe_set_host_doorbell(sbe, + sbe->host_doorbell | SBE_HOST_RESPONSE_WAITING); + + break; + default: + qemu_log_mask(LOG_UNIMP, + "SBE: CMD_STASH_MPIPL_CONFIG: Unimplemented key: 0x" TARGE= T_FMT_lx "\n", + sbe->mbox[1]); + } + break; default: qemu_log_mask(LOG_UNIMP, "SBE Unimplemented command: 0x%x\n", cmd); } diff --git a/include/hw/ppc/pnv_mpipl.h b/include/hw/ppc/pnv_mpipl.h index c544984dc76d..60d6ede48209 100644 --- a/include/hw/ppc/pnv_mpipl.h +++ b/include/hw/ppc/pnv_mpipl.h @@ -8,11 +8,14 @@ #define PNV_MPIPL_H =20 #include "qemu/osdep.h" +#include "exec/hwaddr.h" =20 typedef struct MpiplPreservedState MpiplPreservedState; =20 /* Preserved state to be saved in PnvMachineState */ struct MpiplPreservedState { + /* skiboot_base will be valid only after OPAL sends relocated base to = SBE */ + hwaddr skiboot_base; bool is_next_boot_mpipl; }; =20 --=20 2.53.0