From patchwork Thu Feb 22 11:17:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AKASHI Takahiro X-Patchwork-Id: 10235221 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A463E60224 for ; Thu, 22 Feb 2018 11:21:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A5AA828B9F for ; Thu, 22 Feb 2018 11:21:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 99ED728BA6; Thu, 22 Feb 2018 11:21:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C82A628B9F for ; Thu, 22 Feb 2018 11:21:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=Fge+G+Yn4zLs21lkk+FXiRLTY8y81IJyYiJqA5yj4s4=; b=g0HxG6GZMkWW+od0ZDYt/nGMZK bflo6EJhP4XR3cZMhZlfFQEz4jcO69dLcf512R5Hl0+2IqjuYaQaK8NoV6lVzo7jwHsc/m0CKu7LO LATcmmnc0NO810PzVk2nAx+0vnr0MPHwXlTu+xwgSJIwiMtMZbdK4U7iEkTTkkyJtmJYSldstVDeh TxjK3w/cEZjD/naW4i7hgbVxBYRpQ3CqCZ9dmZ8Z5NIVoWUB2j+02WOQTCva+fewXZQXYCEoeElbe pG5rwYCp3absY9LY+KERouzp2KaZuSjzdRUsOL6rFlj1gT5yzZdzkGjM0tglieKN7oN4aeur0jqgh diBWLw1g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1eoowY-0004yc-BI; Thu, 22 Feb 2018 11:21:42 +0000 Received: from mail-pf0-x244.google.com ([2607:f8b0:400e:c00::244]) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1eoouA-0002Xg-Dp for linux-arm-kernel@lists.infradead.org; Thu, 22 Feb 2018 11:19:30 +0000 Received: by mail-pf0-x244.google.com with SMTP id z24so1944649pfh.13 for ; Thu, 22 Feb 2018 03:19:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Il0NY7dx9L75+0Qy+Cm567MZczyZ9floK17NAH1/Ogc=; b=IfiTt6E99wEJnYwuys9PI+5W6JzG6CYWJ2iRNkkRtyJK+mD7DhtVKBvryDfSnSYPpb DDWjc2Kj57A39wOjKk74JYp8RAcaJ4NsbX5+dD6o+GNImaH0Qd73wXsaSr45A80PacRX rOE89zh74seMPLjaf3CZpN/JjFp8fBdFg4TQ0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Il0NY7dx9L75+0Qy+Cm567MZczyZ9floK17NAH1/Ogc=; b=rqnyo7G+5pUxb2O7kWVdXtzzr+ciWFPREQWKGZMXkW8hfvAJo9rhCR1wHZcUh6A27j EC6gKuEAZySTeC/m24k3BKRPKLRRw3y/86Xllcv9dYvCk7Wa+OPeYYQUiiiRS+aJe9wq 4XmRaV1vq8Ts/uGaxXapDDo41dnVJxuWfqFxcC6KcJsVBAry3a9xxxc7ikAt9zIqWcYH uiOfe4oZusvGgwhwStjWhLUwWSBef0tQaItq13NrK8jfXo6nlkFUAt8xbwwqvWyOs5Ro ryVaZK+sn8cgaZLuPY63YMwCtShPO+BGnm4vwhI081N3fsWYsacqektiYE49ThYCth6A AN4A== X-Gm-Message-State: APf1xPDJ5NuFExU8wbQpu6ghBB3Wa4nXKYZKaFy6Spp5Laf3XW/JtWUG m7vnZq4nUJO4fajRrJrXdI01Jg== X-Google-Smtp-Source: AH8x227pg0xYv9mg47JQuoq31O7nhV7bDRt830cGgFNf9gyExN2Ri6q0B51XoIea3kI4UV5Eo6Nbyw== X-Received: by 10.98.41.194 with SMTP id p185mr6664962pfp.38.1519298347861; Thu, 22 Feb 2018 03:19:07 -0800 (PST) Received: from linaro.org ([121.95.100.191]) by smtp.googlemail.com with ESMTPSA id v8sm19280826pff.38.2018.02.22.03.19.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Feb 2018 03:19:07 -0800 (PST) From: AKASHI Takahiro To: catalin.marinas@arm.com, will.deacon@arm.com, bauerman@linux.vnet.ibm.com, dhowells@redhat.com, vgoyal@redhat.com, herbert@gondor.apana.org.au, davem@davemloft.net, akpm@linux-foundation.org, mpe@ellerman.id.au, dyoung@redhat.com, bhe@redhat.com, arnd@arndb.de, ard.biesheuvel@linaro.org, julien.thierry@arm.com Subject: [PATCH v8 03/13] kexec_file, x86, powerpc: factor out kexec_file_ops functions Date: Thu, 22 Feb 2018 20:17:22 +0900 Message-Id: <20180222111732.23051-4-takahiro.akashi@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180222111732.23051-1-takahiro.akashi@linaro.org> References: <20180222111732.23051-1-takahiro.akashi@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180222_031914_542823_42614460 X-CRM114-Status: GOOD ( 18.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: AKASHI Takahiro , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP As arch_kexec_kernel_*_{probe,load}(), arch_kimage_file_post_load_cleanup() and arch_kexec_kernel_verify_sg can be parameterized with a kexec_file_ops array and now duplicated among some architectures, let's factor them out. Signed-off-by: AKASHI Takahiro Cc: Dave Young Cc: Vivek Goyal Cc: Baoquan He Cc: Michael Ellerman Cc: Thiago Jung Bauermann --- arch/powerpc/include/asm/kexec.h | 2 +- arch/powerpc/kernel/kexec_elf_64.c | 2 +- arch/powerpc/kernel/machine_kexec_file_64.c | 39 ++------------------ arch/x86/include/asm/kexec-bzimage64.h | 2 +- arch/x86/kernel/kexec-bzimage64.c | 2 +- arch/x86/kernel/machine_kexec_64.c | 45 +---------------------- include/linux/kexec.h | 15 ++++---- kernel/kexec_file.c | 57 +++++++++++++++++++++++++++-- 8 files changed, 70 insertions(+), 94 deletions(-) diff --git a/arch/powerpc/include/asm/kexec.h b/arch/powerpc/include/asm/kexec.h index d8b1e8e7e035..4a585cba1787 100644 --- a/arch/powerpc/include/asm/kexec.h +++ b/arch/powerpc/include/asm/kexec.h @@ -95,7 +95,7 @@ static inline bool kdump_in_progress(void) } #ifdef CONFIG_KEXEC_FILE -extern struct kexec_file_ops kexec_elf64_ops; +extern const struct kexec_file_ops kexec_elf64_ops; #ifdef CONFIG_IMA_KEXEC #define ARCH_HAS_KIMAGE_ARCH diff --git a/arch/powerpc/kernel/kexec_elf_64.c b/arch/powerpc/kernel/kexec_elf_64.c index 9a42309b091a..6c78c11c7faf 100644 --- a/arch/powerpc/kernel/kexec_elf_64.c +++ b/arch/powerpc/kernel/kexec_elf_64.c @@ -657,7 +657,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf, return ret ? ERR_PTR(ret) : fdt; } -struct kexec_file_ops kexec_elf64_ops = { +const struct kexec_file_ops kexec_elf64_ops = { .probe = elf64_probe, .load = elf64_load, }; diff --git a/arch/powerpc/kernel/machine_kexec_file_64.c b/arch/powerpc/kernel/machine_kexec_file_64.c index e4395f937d63..a27ec647350c 100644 --- a/arch/powerpc/kernel/machine_kexec_file_64.c +++ b/arch/powerpc/kernel/machine_kexec_file_64.c @@ -31,52 +31,19 @@ #define SLAVE_CODE_SIZE 256 -static struct kexec_file_ops *kexec_file_loaders[] = { +const struct kexec_file_ops * const kexec_file_loaders[] = { &kexec_elf64_ops, + NULL }; int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len) { - int i, ret = -ENOEXEC; - struct kexec_file_ops *fops; - /* We don't support crash kernels yet. */ if (image->type == KEXEC_TYPE_CRASH) return -ENOTSUPP; - for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) { - fops = kexec_file_loaders[i]; - if (!fops || !fops->probe) - continue; - - ret = fops->probe(buf, buf_len); - if (!ret) { - image->fops = fops; - return ret; - } - } - - return ret; -} - -void *arch_kexec_kernel_image_load(struct kimage *image) -{ - if (!image->fops || !image->fops->load) - return ERR_PTR(-ENOEXEC); - - return image->fops->load(image, image->kernel_buf, - image->kernel_buf_len, image->initrd_buf, - image->initrd_buf_len, image->cmdline_buf, - image->cmdline_buf_len); -} - -int arch_kimage_file_post_load_cleanup(struct kimage *image) -{ - if (!image->fops || !image->fops->cleanup) - return 0; - - return image->fops->cleanup(image->image_loader_data); + return _kexec_kernel_image_probe(image, buf, buf_len); } /** diff --git a/arch/x86/include/asm/kexec-bzimage64.h b/arch/x86/include/asm/kexec-bzimage64.h index 9f07cff43705..df89ee7d3e9e 100644 --- a/arch/x86/include/asm/kexec-bzimage64.h +++ b/arch/x86/include/asm/kexec-bzimage64.h @@ -2,6 +2,6 @@ #ifndef _ASM_KEXEC_BZIMAGE64_H #define _ASM_KEXEC_BZIMAGE64_H -extern struct kexec_file_ops kexec_bzImage64_ops; +extern const struct kexec_file_ops kexec_bzImage64_ops; #endif /* _ASM_KEXE_BZIMAGE64_H */ diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c index fb095ba0c02f..705654776c0c 100644 --- a/arch/x86/kernel/kexec-bzimage64.c +++ b/arch/x86/kernel/kexec-bzimage64.c @@ -538,7 +538,7 @@ static int bzImage64_verify_sig(const char *kernel, unsigned long kernel_len) } #endif -struct kexec_file_ops kexec_bzImage64_ops = { +const struct kexec_file_ops kexec_bzImage64_ops = { .probe = bzImage64_probe, .load = bzImage64_load, .cleanup = bzImage64_cleanup, diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index 1f790cf9d38f..2cdd29d64181 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -30,8 +30,9 @@ #include #ifdef CONFIG_KEXEC_FILE -static struct kexec_file_ops *kexec_file_loaders[] = { +const struct kexec_file_ops * const kexec_file_loaders[] = { &kexec_bzImage64_ops, + NULL }; #endif @@ -363,27 +364,6 @@ void arch_crash_save_vmcoreinfo(void) /* arch-dependent functionality related to kexec file-based syscall */ #ifdef CONFIG_KEXEC_FILE -int arch_kexec_kernel_image_probe(struct kimage *image, void *buf, - unsigned long buf_len) -{ - int i, ret = -ENOEXEC; - struct kexec_file_ops *fops; - - for (i = 0; i < ARRAY_SIZE(kexec_file_loaders); i++) { - fops = kexec_file_loaders[i]; - if (!fops || !fops->probe) - continue; - - ret = fops->probe(buf, buf_len); - if (!ret) { - image->fops = fops; - return ret; - } - } - - return ret; -} - void *arch_kexec_kernel_image_load(struct kimage *image) { vfree(image->arch.elf_headers); @@ -398,27 +378,6 @@ void *arch_kexec_kernel_image_load(struct kimage *image) image->cmdline_buf_len); } -int arch_kimage_file_post_load_cleanup(struct kimage *image) -{ - if (!image->fops || !image->fops->cleanup) - return 0; - - return image->fops->cleanup(image->image_loader_data); -} - -#ifdef CONFIG_KEXEC_VERIFY_SIG -int arch_kexec_kernel_verify_sig(struct kimage *image, void *kernel, - unsigned long kernel_len) -{ - if (!image->fops || !image->fops->verify_sig) { - pr_debug("kernel loader does not support signature verification."); - return -EKEYREJECTED; - } - - return image->fops->verify_sig(kernel, kernel_len); -} -#endif - /* * Apply purgatory relocations. * diff --git a/include/linux/kexec.h b/include/linux/kexec.h index f16f6ceb3875..325980537125 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -209,7 +209,7 @@ struct kimage { unsigned long cmdline_buf_len; /* File operations provided by image loader */ - struct kexec_file_ops *fops; + const struct kexec_file_ops *fops; /* Image loader handling the kernel can store a pointer here */ void *image_loader_data; @@ -277,12 +277,13 @@ int crash_shrink_memory(unsigned long new_size); size_t crash_get_memory_size(void); void crash_free_reserved_phys_range(unsigned long begin, unsigned long end); -int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf, - unsigned long buf_len); -void * __weak arch_kexec_kernel_image_load(struct kimage *image); -int __weak arch_kimage_file_post_load_cleanup(struct kimage *image); -int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf, - unsigned long buf_len); +int _kexec_kernel_image_probe(struct kimage *image, void *buf, + unsigned long buf_len); +void *_kexec_kernel_image_load(struct kimage *image); +int _kimage_file_post_load_cleanup(struct kimage *image); +int _kexec_kernel_verify_sig(struct kimage *image, void *buf, + unsigned long buf_len); + int __weak arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, unsigned int relsec); int __weak arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 990adae52151..a6d14a768b3e 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -26,34 +26,83 @@ #include #include "kexec_internal.h" +const __weak struct kexec_file_ops * const kexec_file_loaders[] = {NULL}; + #ifdef CONFIG_ARCH_HAS_KEXEC_PURGATORY static int kexec_calculate_store_digests(struct kimage *image); #else static int kexec_calculate_store_digests(struct kimage *image) { return 0; }; #endif +int _kexec_kernel_image_probe(struct kimage *image, void *buf, + unsigned long buf_len) +{ + const struct kexec_file_ops * const *fops; + int ret = -ENOEXEC; + + for (fops = &kexec_file_loaders[0]; *fops && (*fops)->probe; ++fops) { + ret = (*fops)->probe(buf, buf_len); + if (!ret) { + image->fops = *fops; + return ret; + } + } + + return ret; +} + /* Architectures can provide this probe function */ int __weak arch_kexec_kernel_image_probe(struct kimage *image, void *buf, unsigned long buf_len) { - return -ENOEXEC; + return _kexec_kernel_image_probe(image, buf, buf_len); +} + +void *_kexec_kernel_image_load(struct kimage *image) +{ + if (!image->fops || !image->fops->load) + return ERR_PTR(-ENOEXEC); + + return image->fops->load(image, image->kernel_buf, + image->kernel_buf_len, image->initrd_buf, + image->initrd_buf_len, image->cmdline_buf, + image->cmdline_buf_len); } void * __weak arch_kexec_kernel_image_load(struct kimage *image) { - return ERR_PTR(-ENOEXEC); + return _kexec_kernel_image_load(image); +} + +int _kimage_file_post_load_cleanup(struct kimage *image) +{ + if (!image->fops || !image->fops->cleanup) + return 0; + + return image->fops->cleanup(image->image_loader_data); } int __weak arch_kimage_file_post_load_cleanup(struct kimage *image) { - return -EINVAL; + return _kimage_file_post_load_cleanup(image); } #ifdef CONFIG_KEXEC_VERIFY_SIG +int _kexec_kernel_verify_sig(struct kimage *image, void *buf, + unsigned long buf_len) +{ + if (!image->fops || !image->fops->verify_sig) { + pr_debug("kernel loader does not support signature verification.\n"); + return -EKEYREJECTED; + } + + return image->fops->verify_sig(buf, buf_len); +} + int __weak arch_kexec_kernel_verify_sig(struct kimage *image, void *buf, unsigned long buf_len) { - return -EKEYREJECTED; + return _kexec_kernel_verify_sig(image, buf, buf_len); } #endif