From patchwork Fri Jun 3 18:13:41 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geoff Levand X-Patchwork-Id: 9153821 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 A6B086074E for ; Fri, 3 Jun 2016 18:15:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9BF902832F for ; Fri, 3 Jun 2016 18:15:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8EEB228335; Fri, 3 Jun 2016 18:15:32 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 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.wl.linuxfoundation.org (Postfix) with ESMTPS id 458952832F for ; Fri, 3 Jun 2016 18:15:32 +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 1b8tbU-00056w-HX; Fri, 03 Jun 2016 18:13:52 +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 1b8tbM-00052T-95; Fri, 03 Jun 2016 18:13:44 +0000 Received: from geoff by merlin.infradead.org with local (Exim 4.85_2 #1 (Red Hat Linux)) id 1b8tbJ-0008Tt-3X; Fri, 03 Jun 2016 18:13:41 +0000 Message-Id: In-Reply-To: References: From: Geoff Levand Patch-Date: Wed, 1 Jun 2016 11:59:54 -0700 Subject: [PATCH v17 04/13] arm64/kexec: Add pr_debug output To: Catalin Marinas , Will Deacon Date: Fri, 03 Jun 2016 18:13:41 +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 , James Morse , 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 To aid in debugging kexec problems or when adding new functionality to kexec add a new routine kexec_image_info() and several inline pr_debug 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 bb05529..f232bca 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -11,6 +11,7 @@ #include #include +#include #include #include #include @@ -29,6 +30,47 @@ 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; + + if (get_user(magic, (__be32 *)dtb)) + return false; + + return fdt32_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; + + pr_debug("%s:%d:\n", func, line); + pr_debug(" kexec kimage info:\n"); + pr_debug(" type: %d\n", kimage->type); + pr_debug(" start: %lx\n", kimage->start); + pr_debug(" head: %lx\n", kimage->head); + pr_debug(" nr_segments: %lu\n", kimage->nr_segments); + + for (i = 0; i < kimage->nr_segments; i++) { + pr_debug(" segment[%lu]: %016lx - %016lx, 0x%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. */ @@ -65,6 +107,8 @@ int machine_kexec_prepare(struct kimage *kimage) } } + kexec_image_info(kimage); + return 0; } @@ -140,6 +184,25 @@ void machine_kexec(struct kimage *kimage) reboot_code_buffer_phys = page_to_phys(kimage->control_code_page); reboot_code_buffer = kmap(kimage->control_code_page); + kexec_image_info(kimage); + + pr_debug("%s:%d: control_code_page: %p\n", __func__, __LINE__, + kimage->control_code_page); + pr_debug("%s:%d: reboot_code_buffer_phys: %pa\n", __func__, __LINE__, + &reboot_code_buffer_phys); + pr_debug("%s:%d: reboot_code_buffer: %p\n", __func__, __LINE__, + reboot_code_buffer); + pr_debug("%s:%d: relocate_new_kernel: %p\n", __func__, __LINE__, + arm64_relocate_new_kernel); + pr_debug("%s:%d: relocate_new_kernel_size: 0x%lx(%lu) bytes\n", + __func__, __LINE__, arm64_relocate_new_kernel_size, + arm64_relocate_new_kernel_size); + + pr_debug("%s:%d: kimage_head: %lx\n", __func__, __LINE__, + kimage->head); + pr_debug("%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.