From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5] helo=mx0a-001b2d01.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1bBvns-0006lG-4x for kexec@lists.infradead.org; Sun, 12 Jun 2016 03:11:13 +0000 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u5C38qtX062605 for ; Sat, 11 Jun 2016 23:10:49 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0b-001b2d01.pphosted.com with ESMTP id 23get04k13-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sat, 11 Jun 2016 23:10:49 -0400 Received: from localhost by e24smtp02.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Sun, 12 Jun 2016 00:10:47 -0300 Received: from d24relay03.br.ibm.com (d24relay03.br.ibm.com [9.13.184.25]) by d24dlp01.br.ibm.com (Postfix) with ESMTP id B42DE3520068 for ; Sat, 11 Jun 2016 23:10:28 -0400 (EDT) Received: from d24av02.br.ibm.com (d24av02.br.ibm.com [9.8.31.93]) by d24relay03.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u5C3Ai1b15204830 for ; Sun, 12 Jun 2016 00:10:44 -0300 Received: from d24av02.br.ibm.com (localhost [127.0.0.1]) by d24av02.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u5C3AiSN029563 for ; Sun, 12 Jun 2016 00:10:44 -0300 From: Thiago Jung Bauermann Subject: [PATCH 0/8] kexec_file_load implementation for PowerPC Date: Sun, 12 Jun 2016 00:10:14 -0300 Message-Id: <1465701022-11601-1-git-send-email-bauerman@linux.vnet.ibm.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: linuxppc-dev@lists.ozlabs.org Cc: Thiago Jung Bauermann , kexec@lists.infradead.org, linux-kernel@vger.kernel.org Hello, This patch series implements the kexec_file_load system call on PowerPC. It starts by removing an x86 assumption from kexec_file: kexec_add_buffer uses iomem to find reserved memory ranges, but PowerPC uses the memblock subsystem. Hooks are added so that each arch can specify how memory ranges can be found. Also, the memory-walking logic in kexec_add_buffer is useful in this implementation to find a free area for the purgatory's stack, so that same patch moves that logic to kexec_locate_mem_hole. The kexec_file_load system call needs to apply relocations to the purgatory but adding code for that would duplicate functionality with the module loading mechanism, which also needs to apply relocations to the kernel modules. Therefore, this patch series factors out the module relocation code so that it can be shared. One thing that is still missing is crashkernel support, which I intend to submit shortly. This code is based on kexec-tools, but with many modifications to adapt it to the kernel environment and facilities. Except the purgatory, which only has minimal changes. Thiago Jung Bauermann (8): kexec_file: Remove unused members from struct kexec_buf. kexec_file: Generalize kexec_add_buffer. powerpc: Factor out relocation code from module_64.c to elf_util_64.c. powerpc: Generalize elf64_apply_relocate_add. powerpc: Add functions to read ELF files of any endianness. powerpc: Implement kexec_file_load. powerpc: Add support for loading ELF kernels with kexec_file_load. powerpc: Add purgatory for kexec_file_load implementation. arch/powerpc/Kconfig | 13 + arch/powerpc/Makefile | 4 + arch/powerpc/include/asm/elf_util.h | 92 +++++ arch/powerpc/include/asm/kexec_elf_64.h | 10 + arch/powerpc/include/asm/module.h | 14 +- arch/powerpc/include/asm/systbl.h | 1 + arch/powerpc/include/asm/unistd.h | 2 +- arch/powerpc/include/uapi/asm/unistd.h | 1 + arch/powerpc/kernel/Makefile | 7 + arch/powerpc/kernel/elf_util.c | 476 +++++++++++++++++++++++++ arch/powerpc/kernel/elf_util_64.c | 373 ++++++++++++++++++++ arch/powerpc/kernel/kexec_elf_64.c | 564 ++++++++++++++++++++++++++++++ arch/powerpc/kernel/machine_kexec_64.c | 142 ++++++++ arch/powerpc/kernel/module_64.c | 328 +++-------------- arch/powerpc/purgatory/.gitignore | 2 + arch/powerpc/purgatory/Makefile | 36 ++ arch/powerpc/purgatory/console-ppc64.c | 43 +++ arch/powerpc/purgatory/crashdump-ppc64.h | 42 +++ arch/powerpc/purgatory/crashdump_backup.c | 40 +++ arch/powerpc/purgatory/crtsavres.S | 5 + arch/powerpc/purgatory/hvCall.S | 27 ++ arch/powerpc/purgatory/hvCall.h | 8 + arch/powerpc/purgatory/kexec-sha256.h | 11 + arch/powerpc/purgatory/ppc64_asm.h | 18 + arch/powerpc/purgatory/printf.c | 171 +++++++++ arch/powerpc/purgatory/purgatory-ppc64.c | 46 +++ arch/powerpc/purgatory/purgatory-ppc64.h | 6 + arch/powerpc/purgatory/purgatory.c | 66 ++++ arch/powerpc/purgatory/purgatory.h | 11 + arch/powerpc/purgatory/sha256.c | 6 + arch/powerpc/purgatory/sha256.h | 1 + arch/powerpc/purgatory/string.S | 1 + arch/powerpc/purgatory/v2wrap.S | 139 ++++++++ include/linux/kexec.h | 10 + kernel/kexec_file.c | 102 ++++-- kernel/kexec_internal.h | 2 - 36 files changed, 2504 insertions(+), 316 deletions(-) create mode 100644 arch/powerpc/include/asm/elf_util.h create mode 100644 arch/powerpc/include/asm/kexec_elf_64.h create mode 100644 arch/powerpc/kernel/elf_util.c create mode 100644 arch/powerpc/kernel/elf_util_64.c create mode 100644 arch/powerpc/kernel/kexec_elf_64.c create mode 100644 arch/powerpc/purgatory/.gitignore create mode 100644 arch/powerpc/purgatory/Makefile create mode 100644 arch/powerpc/purgatory/console-ppc64.c create mode 100644 arch/powerpc/purgatory/crashdump-ppc64.h create mode 100644 arch/powerpc/purgatory/crashdump_backup.c create mode 100644 arch/powerpc/purgatory/crtsavres.S create mode 100644 arch/powerpc/purgatory/hvCall.S create mode 100644 arch/powerpc/purgatory/hvCall.h create mode 100644 arch/powerpc/purgatory/kexec-sha256.h create mode 100644 arch/powerpc/purgatory/ppc64_asm.h create mode 100644 arch/powerpc/purgatory/printf.c create mode 100644 arch/powerpc/purgatory/purgatory-ppc64.c create mode 100644 arch/powerpc/purgatory/purgatory-ppc64.h create mode 100644 arch/powerpc/purgatory/purgatory.c create mode 100644 arch/powerpc/purgatory/purgatory.h create mode 100644 arch/powerpc/purgatory/sha256.c create mode 100644 arch/powerpc/purgatory/sha256.h create mode 100644 arch/powerpc/purgatory/string.S create mode 100644 arch/powerpc/purgatory/v2wrap.S -- 1.9.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec