From patchwork Fri Nov 6 19:14:36 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geoff Levand X-Patchwork-Id: 7572151 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3013A9F1C4 for ; Fri, 6 Nov 2015 20:04:15 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4CE0B20722 for ; Fri, 6 Nov 2015 20:04:14 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5D65D206F9 for ; Fri, 6 Nov 2015 20:04:13 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZunDU-0006No-TD; Fri, 06 Nov 2015 20:02:32 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zun67-0004wL-9I; Fri, 06 Nov 2015 19:54:55 +0000 Received: from geoff by merlin.infradead.org with local (Exim 4.85 #2 (Red Hat Linux)) id 1ZumT6-0000Bu-Rq; Fri, 06 Nov 2015 19:14:36 +0000 Message-Id: In-Reply-To: References: From: Geoff Levand Patch-Date: Tue, 22 Sep 2015 15:36:30 -0700 Subject: [PATCH 08/15] arm64/kexec: Add pr_devel output To: Catalin Marinas , Will Deacon Date: Fri, 06 Nov 2015 19:14:36 +0000 X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , marc.zyngier@arm.com, kexec@lists.infradead.org, AKASHI Takahiro , christoffer.dall@linaro.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-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP To aid in debugging kexec problems or when adding new functionality to kexec add a new routine kexec_image_info() and several inline pr_devel statements. Signed-off-by: Geoff Levand --- arch/arm64/kernel/machine_kexec.c | 63 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index 8b990b8..da28a26 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -25,6 +25,48 @@ extern const unsigned long arm64_relocate_new_kernel_size; static unsigned long kimage_start; +/** + * kexec_is_dtb - Helper routine to check the device tree header signature. + */ +static bool kexec_is_dtb(const void *dtb) +{ + __be32 magic; + + return get_user(magic, (__be32 *)dtb) ? false : + (be32_to_cpu(magic) == OF_DT_HEADER); +} + +/** + * kexec_image_info - For debugging output. + */ +#define kexec_image_info(_i) _kexec_image_info(__func__, __LINE__, _i) +static void _kexec_image_info(const char *func, int line, + const struct kimage *kimage) +{ + unsigned long i; + +#if !defined(DEBUG) + return; +#endif + pr_devel("%s:%d:\n", func, line); + pr_devel(" kexec kimage info:\n"); + pr_devel(" type: %d\n", kimage->type); + pr_devel(" start: %lx\n", kimage->start); + pr_devel(" head: %lx\n", kimage->head); + pr_devel(" nr_segments: %lu\n", kimage->nr_segments); + + for (i = 0; i < kimage->nr_segments; i++) { + pr_devel(" segment[%lu]: %016lx - %016lx, %lx bytes, %lu pages%s\n", + i, + kimage->segment[i].mem, + kimage->segment[i].mem + kimage->segment[i].memsz, + kimage->segment[i].memsz, + kimage->segment[i].memsz / PAGE_SIZE, + (kexec_is_dtb(kimage->segment[i].buf) ? + ", dtb segment" : "")); + } +} + void machine_kexec_cleanup(struct kimage *kimage) { /* Empty routine needed to avoid build errors. */ @@ -38,6 +80,8 @@ void machine_kexec_cleanup(struct kimage *kimage) int machine_kexec_prepare(struct kimage *kimage) { kimage_start = kimage->start; + kexec_image_info(kimage); + return 0; } @@ -107,6 +151,25 @@ void machine_kexec(struct kimage *kimage) reboot_code_buffer_phys = page_to_phys(kimage->control_code_page); reboot_code_buffer = phys_to_virt(reboot_code_buffer_phys); + kexec_image_info(kimage); + + pr_devel("%s:%d: control_code_page: %p\n", __func__, __LINE__, + kimage->control_code_page); + pr_devel("%s:%d: reboot_code_buffer_phys: %pa\n", __func__, __LINE__, + &reboot_code_buffer_phys); + pr_devel("%s:%d: reboot_code_buffer: %p\n", __func__, __LINE__, + reboot_code_buffer); + pr_devel("%s:%d: relocate_new_kernel: %p\n", __func__, __LINE__, + arm64_relocate_new_kernel); + pr_devel("%s:%d: relocate_new_kernel_size: 0x%lx(%lu) bytes\n", + __func__, __LINE__, arm64_relocate_new_kernel_size, + arm64_relocate_new_kernel_size); + + pr_devel("%s:%d: kimage_head: %lx\n", __func__, __LINE__, + kimage->head); + pr_devel("%s:%d: kimage_start: %lx\n", __func__, __LINE__, + kimage_start); + /* * Copy arm64_relocate_new_kernel to the reboot_code_buffer for use * after the kernel is shut down.