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=-7.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY autolearn=unavailable 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 7FA3FC433ED for ; Mon, 13 Jul 2020 17:23:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 636E2206F5 for ; Mon, 13 Jul 2020 17:23:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730576AbgGMRXA (ORCPT ); Mon, 13 Jul 2020 13:23:00 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:35040 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729747AbgGMRW7 (ORCPT ); Mon, 13 Jul 2020 13:22:59 -0400 Received: from pps.filterd (m0098421.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 06DH226b145170; Mon, 13 Jul 2020 13:22:49 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3279dtb8pm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Jul 2020 13:22:49 -0400 Received: from m0098421.ppops.net (m0098421.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 06DHIibl193771; Mon, 13 Jul 2020 13:22:48 -0400 Received: from ppma02fra.de.ibm.com (47.49.7a9f.ip4.static.sl-reverse.com [159.122.73.71]) by mx0a-001b2d01.pphosted.com with ESMTP id 3279dtb8nw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Jul 2020 13:22:48 -0400 Received: from pps.filterd (ppma02fra.de.ibm.com [127.0.0.1]) by ppma02fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 06DHLDWc027163; Mon, 13 Jul 2020 17:22:46 GMT Received: from b06cxnps3074.portsmouth.uk.ibm.com (d06relay09.portsmouth.uk.ibm.com [9.149.109.194]) by ppma02fra.de.ibm.com with ESMTP id 327527tfcp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Jul 2020 17:22:46 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06DHMhCX12583402 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 13 Jul 2020 17:22:43 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7BE2A4055; Mon, 13 Jul 2020 17:22:43 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 37BE6A4053; Mon, 13 Jul 2020 17:22:40 +0000 (GMT) Received: from hbathini.in.ibm.com (unknown [9.102.3.11]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 13 Jul 2020 17:22:39 +0000 (GMT) Subject: [PATCH v3 08/12] ppc64/kexec_file: setup the stack for purgatory From: Hari Bathini To: Michael Ellerman , Andrew Morton Cc: Pingfan Liu , Kexec-ml , Mimi Zohar , Nayna Jain , Petr Tesarik , Mahesh J Salgaonkar , Sourabh Jain , lkml , linuxppc-dev , Eric Biederman , Thiago Jung Bauermann , Dave Young , Vivek Goyal Date: Mon, 13 Jul 2020 22:52:39 +0530 Message-ID: <159466095278.24747.9161591016931052627.stgit@hbathini.in.ibm.com> In-Reply-To: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> References: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-07-13_15:2020-07-13,2020-07-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 spamscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007130120 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To avoid any weird errors, the purgatory should run with its own stack. Set one up by adding the stack buffer to .data section of the purgatory. Also, setup opal base & entry values in r8 & r9 registers to help early OPAL debugging. Signed-off-by: Hari Bathini Tested-by: Pingfan Liu --- v2 -> v3: * Unchanged. Added Tested-by tag from Pingfan. v1 -> v2: * Setting up opal base & entry values in r8 & r9 for early OPAL debug. arch/powerpc/include/asm/kexec.h | 4 ++++ arch/powerpc/kexec/file_load_64.c | 29 +++++++++++++++++++++++++++++ arch/powerpc/purgatory/trampoline_64.S | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+) diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index bf47a01..e78cd0a 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -45,6 +45,10 @@ #define KEXEC_ARCH KEXEC_ARCH_PPC #endif +#ifdef CONFIG_KEXEC_FILE +#define KEXEC_PURGATORY_STACK_SIZE 16384 /* 16KB stack size */ +#endif + #define KEXEC_STATE_NONE 0 #define KEXEC_STATE_IRQS_OFF 1 #define KEXEC_STATE_REAL_MODE 2 diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index 8bff29e..adad297 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -875,6 +875,8 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, const void *fdt, unsigned long kernel_load_addr, unsigned long fdt_load_addr) { + struct device_node *dn; + void *stack_buf; uint64_t val; int ret; @@ -898,10 +900,37 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, goto out; } + /* Setup the stack top */ + stack_buf = kexec_purgatory_get_symbol_addr(image, "stack_buf"); + if (!stack_buf) + goto out; + + val = (u64)stack_buf + KEXEC_PURGATORY_STACK_SIZE; + ret = kexec_purgatory_get_set_symbol(image, "stack", &val, sizeof(val), + false); + if (ret) + goto out; + /* Setup the TOC pointer */ val = get_toc_ptr(&(image->purgatory_info)); ret = kexec_purgatory_get_set_symbol(image, "my_toc", &val, sizeof(val), false); + if (ret) + goto out; + + /* Setup OPAL base & entry values */ + dn = of_find_node_by_path("/ibm,opal"); + if (dn) { + of_property_read_u64(dn, "opal-base-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_base", &val, + sizeof(val), false); + if (ret) + goto out; + + of_property_read_u64(dn, "opal-entry-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_entry", &val, + sizeof(val), false); + } out: if (ret) pr_err("Failed to setup purgatory symbols"); diff --git a/arch/powerpc/purgatory/trampoline_64.S b/arch/powerpc/purgatory/trampoline_64.S index 7b4a5f7..83e93b7 100644 --- a/arch/powerpc/purgatory/trampoline_64.S +++ b/arch/powerpc/purgatory/trampoline_64.S @@ -9,6 +9,7 @@ * Copyright (C) 2013, Anton Blanchard, IBM Corporation */ +#include #include .machine ppc64 @@ -53,6 +54,8 @@ master: ld %r2,(my_toc - 0b)(%r18) /* setup toc */ + ld %r1,(stack - 0b)(%r18) /* setup stack */ + /* load device-tree address */ ld %r3, (dt_offset - 0b)(%r18) mr %r16,%r3 /* save dt address in reg16 */ @@ -63,6 +66,11 @@ master: li %r4,28 STWX_BE %r17,%r3,%r4 /* Store my cpu as __be32 at byte 28 */ 1: + + /* Load opal base and entry values in r8 & r9 respectively */ + ld %r8,(opal_base - 0b)(%r18) + ld %r9,(opal_entry - 0b)(%r18) + /* load the kernel address */ ld %r4,(kernel - 0b)(%r18) @@ -111,6 +119,24 @@ my_toc: .8byte 0x0 .size my_toc, . - my_toc + .balign 8 + .globl stack +stack: + .8byte 0x0 + .size stack, . - stack + + .balign 8 + .globl opal_base +opal_base: + .8byte 0x0 + .size opal_base, . - opal_base + + .balign 8 + .globl opal_entry +opal_entry: + .8byte 0x0 + .size opal_entry, . - opal_entry + .data .balign 8 .globl purgatory_sha256_digest @@ -123,3 +149,9 @@ purgatory_sha256_digest: purgatory_sha_regions: .skip 8 * 2 * 16 .size purgatory_sha_regions, . - purgatory_sha_regions + + .balign 8 +.globl stack_buf +stack_buf: + .skip KEXEC_PURGATORY_STACK_SIZE + .size stack_buf, . - stack_buf 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=-7.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY autolearn=unavailable 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 57AECC433DF for ; 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Mon, 13 Jul 2020 17:22:46 +0000 Received: from d06av23.portsmouth.uk.ibm.com (d06av23.portsmouth.uk.ibm.com [9.149.105.59]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 06DHMhCX12583402 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 13 Jul 2020 17:22:43 GMT Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C7BE2A4055; Mon, 13 Jul 2020 17:22:43 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 37BE6A4053; Mon, 13 Jul 2020 17:22:40 +0000 (GMT) Received: from hbathini.in.ibm.com (unknown [9.102.3.11]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 13 Jul 2020 17:22:39 +0000 (GMT) Subject: [PATCH v3 08/12] ppc64/kexec_file: setup the stack for purgatory From: Hari Bathini To: Michael Ellerman , Andrew Morton Date: Mon, 13 Jul 2020 22:52:39 +0530 Message-ID: <159466095278.24747.9161591016931052627.stgit@hbathini.in.ibm.com> In-Reply-To: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> References: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235, 18.0.687 definitions=2020-07-13_15:2020-07-13, 2020-07-13 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 phishscore=0 mlxscore=0 adultscore=0 bulkscore=0 spamscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2007130120 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pingfan Liu , Kexec-ml , Nayna Jain , Petr Tesarik , Mahesh J Salgaonkar , Mimi Zohar , lkml , linuxppc-dev , Sourabh Jain , Vivek Goyal , Dave Young , Thiago Jung Bauermann , Eric Biederman Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" To avoid any weird errors, the purgatory should run with its own stack. Set one up by adding the stack buffer to .data section of the purgatory. Also, setup opal base & entry values in r8 & r9 registers to help early OPAL debugging. Signed-off-by: Hari Bathini Tested-by: Pingfan Liu --- v2 -> v3: * Unchanged. Added Tested-by tag from Pingfan. v1 -> v2: * Setting up opal base & entry values in r8 & r9 for early OPAL debug. arch/powerpc/include/asm/kexec.h | 4 ++++ arch/powerpc/kexec/file_load_64.c | 29 +++++++++++++++++++++++++++++ arch/powerpc/purgatory/trampoline_64.S | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+) diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index bf47a01..e78cd0a 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -45,6 +45,10 @@ #define KEXEC_ARCH KEXEC_ARCH_PPC #endif +#ifdef CONFIG_KEXEC_FILE +#define KEXEC_PURGATORY_STACK_SIZE 16384 /* 16KB stack size */ +#endif + #define KEXEC_STATE_NONE 0 #define KEXEC_STATE_IRQS_OFF 1 #define KEXEC_STATE_REAL_MODE 2 diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index 8bff29e..adad297 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -875,6 +875,8 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, const void *fdt, unsigned long kernel_load_addr, unsigned long fdt_load_addr) { + struct device_node *dn; + void *stack_buf; uint64_t val; int ret; @@ -898,10 +900,37 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, goto out; } + /* Setup the stack top */ + stack_buf = kexec_purgatory_get_symbol_addr(image, "stack_buf"); + if (!stack_buf) + goto out; + + val = (u64)stack_buf + KEXEC_PURGATORY_STACK_SIZE; + ret = kexec_purgatory_get_set_symbol(image, "stack", &val, sizeof(val), + false); + if (ret) + goto out; + /* Setup the TOC pointer */ val = get_toc_ptr(&(image->purgatory_info)); ret = kexec_purgatory_get_set_symbol(image, "my_toc", &val, sizeof(val), false); + if (ret) + goto out; + + /* Setup OPAL base & entry values */ + dn = of_find_node_by_path("/ibm,opal"); + if (dn) { + of_property_read_u64(dn, "opal-base-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_base", &val, + sizeof(val), false); + if (ret) + goto out; + + of_property_read_u64(dn, "opal-entry-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_entry", &val, + sizeof(val), false); + } out: if (ret) pr_err("Failed to setup purgatory symbols"); diff --git a/arch/powerpc/purgatory/trampoline_64.S b/arch/powerpc/purgatory/trampoline_64.S index 7b4a5f7..83e93b7 100644 --- a/arch/powerpc/purgatory/trampoline_64.S +++ b/arch/powerpc/purgatory/trampoline_64.S @@ -9,6 +9,7 @@ * Copyright (C) 2013, Anton Blanchard, IBM Corporation */ +#include #include .machine ppc64 @@ -53,6 +54,8 @@ master: ld %r2,(my_toc - 0b)(%r18) /* setup toc */ + ld %r1,(stack - 0b)(%r18) /* setup stack */ + /* load device-tree address */ ld %r3, (dt_offset - 0b)(%r18) mr %r16,%r3 /* save dt address in reg16 */ @@ -63,6 +66,11 @@ master: li %r4,28 STWX_BE %r17,%r3,%r4 /* Store my cpu as __be32 at byte 28 */ 1: + + /* Load opal base and entry values in r8 & r9 respectively */ + ld %r8,(opal_base - 0b)(%r18) + ld %r9,(opal_entry - 0b)(%r18) + /* load the kernel address */ ld %r4,(kernel - 0b)(%r18) @@ -111,6 +119,24 @@ my_toc: .8byte 0x0 .size my_toc, . - my_toc + .balign 8 + .globl stack +stack: + .8byte 0x0 + .size stack, . - stack + + .balign 8 + .globl opal_base +opal_base: + .8byte 0x0 + .size opal_base, . - opal_base + + .balign 8 + .globl opal_entry +opal_entry: + .8byte 0x0 + .size opal_entry, . - opal_entry + .data .balign 8 .globl purgatory_sha256_digest @@ -123,3 +149,9 @@ purgatory_sha256_digest: purgatory_sha_regions: .skip 8 * 2 * 16 .size purgatory_sha_regions, . - purgatory_sha_regions + + .balign 8 +.globl stack_buf +stack_buf: + .skip KEXEC_PURGATORY_STACK_SIZE + .size stack_buf, . - stack_buf From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jv2AG-0007Wp-KI for kexec@lists.infradead.org; Mon, 13 Jul 2020 17:22:54 +0000 Subject: [PATCH v3 08/12] ppc64/kexec_file: setup the stack for purgatory From: Hari Bathini Date: Mon, 13 Jul 2020 22:52:39 +0530 Message-ID: <159466095278.24747.9161591016931052627.stgit@hbathini.in.ibm.com> In-Reply-To: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> References: <159466074408.24747.10036072269371204890.stgit@hbathini.in.ibm.com> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Michael Ellerman , Andrew Morton Cc: Pingfan Liu , Kexec-ml , Nayna Jain , Petr Tesarik , Mahesh J Salgaonkar , Mimi Zohar , lkml , linuxppc-dev , Sourabh Jain , Vivek Goyal , Dave Young , Thiago Jung Bauermann , Eric Biederman To avoid any weird errors, the purgatory should run with its own stack. Set one up by adding the stack buffer to .data section of the purgatory. Also, setup opal base & entry values in r8 & r9 registers to help early OPAL debugging. Signed-off-by: Hari Bathini Tested-by: Pingfan Liu --- v2 -> v3: * Unchanged. Added Tested-by tag from Pingfan. v1 -> v2: * Setting up opal base & entry values in r8 & r9 for early OPAL debug. arch/powerpc/include/asm/kexec.h | 4 ++++ arch/powerpc/kexec/file_load_64.c | 29 +++++++++++++++++++++++++++++ arch/powerpc/purgatory/trampoline_64.S | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 65 insertions(+) diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index bf47a01..e78cd0a 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -45,6 +45,10 @@ #define KEXEC_ARCH KEXEC_ARCH_PPC #endif +#ifdef CONFIG_KEXEC_FILE +#define KEXEC_PURGATORY_STACK_SIZE 16384 /* 16KB stack size */ +#endif + #define KEXEC_STATE_NONE 0 #define KEXEC_STATE_IRQS_OFF 1 #define KEXEC_STATE_REAL_MODE 2 diff --git a/arch/powerpc/kexec/file_load_64.c b/arch/powerpc/kexec/file_load_64.c index 8bff29e..adad297 100644 --- a/arch/powerpc/kexec/file_load_64.c +++ b/arch/powerpc/kexec/file_load_64.c @@ -875,6 +875,8 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, const void *fdt, unsigned long kernel_load_addr, unsigned long fdt_load_addr) { + struct device_node *dn; + void *stack_buf; uint64_t val; int ret; @@ -898,10 +900,37 @@ int setup_purgatory_ppc64(struct kimage *image, const void *slave_code, goto out; } + /* Setup the stack top */ + stack_buf = kexec_purgatory_get_symbol_addr(image, "stack_buf"); + if (!stack_buf) + goto out; + + val = (u64)stack_buf + KEXEC_PURGATORY_STACK_SIZE; + ret = kexec_purgatory_get_set_symbol(image, "stack", &val, sizeof(val), + false); + if (ret) + goto out; + /* Setup the TOC pointer */ val = get_toc_ptr(&(image->purgatory_info)); ret = kexec_purgatory_get_set_symbol(image, "my_toc", &val, sizeof(val), false); + if (ret) + goto out; + + /* Setup OPAL base & entry values */ + dn = of_find_node_by_path("/ibm,opal"); + if (dn) { + of_property_read_u64(dn, "opal-base-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_base", &val, + sizeof(val), false); + if (ret) + goto out; + + of_property_read_u64(dn, "opal-entry-address", &val); + ret = kexec_purgatory_get_set_symbol(image, "opal_entry", &val, + sizeof(val), false); + } out: if (ret) pr_err("Failed to setup purgatory symbols"); diff --git a/arch/powerpc/purgatory/trampoline_64.S b/arch/powerpc/purgatory/trampoline_64.S index 7b4a5f7..83e93b7 100644 --- a/arch/powerpc/purgatory/trampoline_64.S +++ b/arch/powerpc/purgatory/trampoline_64.S @@ -9,6 +9,7 @@ * Copyright (C) 2013, Anton Blanchard, IBM Corporation */ +#include #include .machine ppc64 @@ -53,6 +54,8 @@ master: ld %r2,(my_toc - 0b)(%r18) /* setup toc */ + ld %r1,(stack - 0b)(%r18) /* setup stack */ + /* load device-tree address */ ld %r3, (dt_offset - 0b)(%r18) mr %r16,%r3 /* save dt address in reg16 */ @@ -63,6 +66,11 @@ master: li %r4,28 STWX_BE %r17,%r3,%r4 /* Store my cpu as __be32 at byte 28 */ 1: + + /* Load opal base and entry values in r8 & r9 respectively */ + ld %r8,(opal_base - 0b)(%r18) + ld %r9,(opal_entry - 0b)(%r18) + /* load the kernel address */ ld %r4,(kernel - 0b)(%r18) @@ -111,6 +119,24 @@ my_toc: .8byte 0x0 .size my_toc, . - my_toc + .balign 8 + .globl stack +stack: + .8byte 0x0 + .size stack, . - stack + + .balign 8 + .globl opal_base +opal_base: + .8byte 0x0 + .size opal_base, . - opal_base + + .balign 8 + .globl opal_entry +opal_entry: + .8byte 0x0 + .size opal_entry, . - opal_entry + .data .balign 8 .globl purgatory_sha256_digest @@ -123,3 +149,9 @@ purgatory_sha256_digest: purgatory_sha_regions: .skip 8 * 2 * 16 .size purgatory_sha_regions, . - purgatory_sha_regions + + .balign 8 +.globl stack_buf +stack_buf: + .skip KEXEC_PURGATORY_STACK_SIZE + .size stack_buf, . - stack_buf _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec