From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751822AbeBBNHc (ORCPT ); Fri, 2 Feb 2018 08:07:32 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:46858 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750773AbeBBNHY (ORCPT ); Fri, 2 Feb 2018 08:07:24 -0500 From: Philipp Rudo To: kexec@lists.infradead.org, linux-s390@vger.kernel.org Cc: prudo@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, Eric Biederman , Vivek Goyal , Michael Ellerman , Thiago Jung Bauermann , Martin Schwidefsky , Heiko Carstens Subject: [PATCH 00/17] Add kexec_file_load support to s390 Date: Fri, 2 Feb 2018 14:07:01 +0100 X-Mailer: git-send-email 2.13.5 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 x-cbid: 18020213-0040-0000-0000-0000040BC081 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18020213-0041-0000-0000-0000260F648E Message-Id: <20180202130718.35509-1-prudo@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-02-02_04:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802020162 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi everybody this series adds the kexec_file_load system call to s390. Before the system call is added there are some preparations/clean ups to common kexec_file_load. In detail this series contains: Patch #1&2: Minor cleanups/fixes. Patch #3-9: Clean up the purgatory load/relocation code. Especially remove the mis-use of the purgatory_info->sechdrs->sh_offset field, currently holding a pointer into either kexec_purgatory (ro) or purgatory_buf (rw) depending on the section. With these patches the section address will be calculated verbosely and sh_offset will contain the offset of the section in the stripped purgatory binary (purgatory_buf). Patch #10: Allows architectures to set the purgaory load address. This patch is important for s390 as the kernel and purgatory have to be loaded to fixed addresses. In current code this is impossible as the purgatory load is opaque to the architecture. Patch #11: Moves x86 purgatories sha implementation to common lib/ directory. Patches #12-17 finally adds the kexec_file_load system call to s390. Please note that I had to touch arch code for x86 and power a little. In theory this should not change the behavior but I don't have a way to test it. Cross-compiling with defconfig(*) works fine for both. Thanks Philipp (*) On x86 with the orc unwinder turned off. objtool SEGFAULTs on s390... Philipp Rudo (17): kexec_file: Silence compile warnings kexec_file: Remove checks in kexec_purgatory_load kexec_file: Make purgatory_info->ehdr const kexec_file: Search symbols in read-only kexec_purgatory kexec_file: Use read-only sections in arch_kexec_apply_relocations* kexec_file: Split up __kexec_load_puragory kexec_file: Simplify kexec_purgatory_setup_sechdrs 1 kexec_file: Simplify kexec_purgatory_setup_sechdrs 2 kexec_file: Remove mis-use of sh_offset field kexec_file: Allow archs to set purgatory load address kexec_file: Move purgatories sha256 to common code s390/kexec_file: Prepare setup.h for kexec_file_load s390/kexec_file: Add purgatory s390/kexec_file: Add kexec_file_load system call s390/kexec_file: Add image loader s390/kexec_file: Add crash support to image loader s390/kexec_file: Add ELF loader arch/powerpc/kernel/kexec_elf_64.c | 9 +- arch/s390/Kbuild | 1 + arch/s390/Kconfig | 4 + arch/s390/include/asm/kexec.h | 23 ++ arch/s390/include/asm/purgatory.h | 17 ++ arch/s390/include/asm/setup.h | 40 ++- arch/s390/kernel/Makefile | 1 + arch/s390/kernel/asm-offsets.c | 5 + arch/s390/kernel/compat_wrapper.c | 1 + arch/s390/kernel/kexec_elf.c | 149 ++++++++++ arch/s390/kernel/kexec_image.c | 78 +++++ arch/s390/kernel/machine_kexec_file.c | 291 +++++++++++++++++++ arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/s390/purgatory/Makefile | 37 +++ arch/s390/purgatory/head.S | 279 ++++++++++++++++++ arch/s390/purgatory/purgatory.c | 42 +++ arch/x86/kernel/kexec-bzimage64.c | 8 +- arch/x86/kernel/machine_kexec_64.c | 66 ++--- arch/x86/purgatory/Makefile | 3 + arch/x86/purgatory/purgatory.c | 2 +- include/linux/kexec.h | 38 +-- {arch/x86/purgatory => include/linux}/sha256.h | 10 +- kernel/kexec_file.c | 375 ++++++++++++------------- {arch/x86/purgatory => lib}/sha256.c | 4 +- 24 files changed, 1200 insertions(+), 284 deletions(-) create mode 100644 arch/s390/include/asm/purgatory.h create mode 100644 arch/s390/kernel/kexec_elf.c create mode 100644 arch/s390/kernel/kexec_image.c create mode 100644 arch/s390/kernel/machine_kexec_file.c create mode 100644 arch/s390/purgatory/Makefile create mode 100644 arch/s390/purgatory/head.S create mode 100644 arch/s390/purgatory/purgatory.c rename {arch/x86/purgatory => include/linux}/sha256.h (63%) rename {arch/x86/purgatory => lib}/sha256.c (99%) -- 2.13.5 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1ehb47-0007p4-Pl for kexec@lists.infradead.org; Fri, 02 Feb 2018 13:07:42 +0000 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w12D6E1L055812 for ; Fri, 2 Feb 2018 08:07:25 -0500 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 2fvqmqtpqs-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 02 Feb 2018 08:07:24 -0500 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 2 Feb 2018 13:07:22 -0000 From: Philipp Rudo Subject: [PATCH 00/17] Add kexec_file_load support to s390 Date: Fri, 2 Feb 2018 14:07:01 +0100 MIME-Version: 1.0 Message-Id: <20180202130718.35509-1-prudo@linux.vnet.ibm.com> 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: kexec@lists.infradead.org, linux-s390@vger.kernel.org Cc: prudo@linux.vnet.ibm.com, Michael Ellerman , Heiko Carstens , linux-kernel@vger.kernel.org, Martin Schwidefsky , Eric Biederman , Thiago Jung Bauermann , Vivek Goyal Hi everybody this series adds the kexec_file_load system call to s390. Before the system call is added there are some preparations/clean ups to common kexec_file_load. In detail this series contains: Patch #1&2: Minor cleanups/fixes. Patch #3-9: Clean up the purgatory load/relocation code. Especially remove the mis-use of the purgatory_info->sechdrs->sh_offset field, currently holding a pointer into either kexec_purgatory (ro) or purgatory_buf (rw) depending on the section. With these patches the section address will be calculated verbosely and sh_offset will contain the offset of the section in the stripped purgatory binary (purgatory_buf). Patch #10: Allows architectures to set the purgaory load address. This patch is important for s390 as the kernel and purgatory have to be loaded to fixed addresses. In current code this is impossible as the purgatory load is opaque to the architecture. Patch #11: Moves x86 purgatories sha implementation to common lib/ directory. Patches #12-17 finally adds the kexec_file_load system call to s390. Please note that I had to touch arch code for x86 and power a little. In theory this should not change the behavior but I don't have a way to test it. Cross-compiling with defconfig(*) works fine for both. Thanks Philipp (*) On x86 with the orc unwinder turned off. objtool SEGFAULTs on s390... Philipp Rudo (17): kexec_file: Silence compile warnings kexec_file: Remove checks in kexec_purgatory_load kexec_file: Make purgatory_info->ehdr const kexec_file: Search symbols in read-only kexec_purgatory kexec_file: Use read-only sections in arch_kexec_apply_relocations* kexec_file: Split up __kexec_load_puragory kexec_file: Simplify kexec_purgatory_setup_sechdrs 1 kexec_file: Simplify kexec_purgatory_setup_sechdrs 2 kexec_file: Remove mis-use of sh_offset field kexec_file: Allow archs to set purgatory load address kexec_file: Move purgatories sha256 to common code s390/kexec_file: Prepare setup.h for kexec_file_load s390/kexec_file: Add purgatory s390/kexec_file: Add kexec_file_load system call s390/kexec_file: Add image loader s390/kexec_file: Add crash support to image loader s390/kexec_file: Add ELF loader arch/powerpc/kernel/kexec_elf_64.c | 9 +- arch/s390/Kbuild | 1 + arch/s390/Kconfig | 4 + arch/s390/include/asm/kexec.h | 23 ++ arch/s390/include/asm/purgatory.h | 17 ++ arch/s390/include/asm/setup.h | 40 ++- arch/s390/kernel/Makefile | 1 + arch/s390/kernel/asm-offsets.c | 5 + arch/s390/kernel/compat_wrapper.c | 1 + arch/s390/kernel/kexec_elf.c | 149 ++++++++++ arch/s390/kernel/kexec_image.c | 78 +++++ arch/s390/kernel/machine_kexec_file.c | 291 +++++++++++++++++++ arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/s390/purgatory/Makefile | 37 +++ arch/s390/purgatory/head.S | 279 ++++++++++++++++++ arch/s390/purgatory/purgatory.c | 42 +++ arch/x86/kernel/kexec-bzimage64.c | 8 +- arch/x86/kernel/machine_kexec_64.c | 66 ++--- arch/x86/purgatory/Makefile | 3 + arch/x86/purgatory/purgatory.c | 2 +- include/linux/kexec.h | 38 +-- {arch/x86/purgatory => include/linux}/sha256.h | 10 +- kernel/kexec_file.c | 375 ++++++++++++------------- {arch/x86/purgatory => lib}/sha256.c | 4 +- 24 files changed, 1200 insertions(+), 284 deletions(-) create mode 100644 arch/s390/include/asm/purgatory.h create mode 100644 arch/s390/kernel/kexec_elf.c create mode 100644 arch/s390/kernel/kexec_image.c create mode 100644 arch/s390/kernel/machine_kexec_file.c create mode 100644 arch/s390/purgatory/Makefile create mode 100644 arch/s390/purgatory/head.S create mode 100644 arch/s390/purgatory/purgatory.c rename {arch/x86/purgatory => include/linux}/sha256.h (63%) rename {arch/x86/purgatory => lib}/sha256.c (99%) -- 2.13.5 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec