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 4.85_2 #1 (Red Hat Linux)) id 1bXz5y-0006u0-DK for kexec@lists.infradead.org; Thu, 11 Aug 2016 23:09:08 +0000 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u7BN8f5N055250 for ; Thu, 11 Aug 2016 19:08:44 -0400 Received: from e24smtp01.br.ibm.com (e24smtp01.br.ibm.com [32.104.18.85]) by mx0a-001b2d01.pphosted.com with ESMTP id 24qm9vfehw-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 11 Aug 2016 19:08:43 -0400 Received: from localhost by e24smtp01.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 11 Aug 2016 20:08:37 -0300 Received: from d24relay03.br.ibm.com (d24relay03.br.ibm.com [9.13.184.25]) by d24dlp01.br.ibm.com (Postfix) with ESMTP id 3F4F23520068 for ; Thu, 11 Aug 2016 19:08:14 -0400 (EDT) Received: from d24av01.br.ibm.com (d24av01.br.ibm.com [9.8.31.91]) by d24relay03.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u7BN8YTA16253422 for ; Thu, 11 Aug 2016 20:08:34 -0300 Received: from d24av01.br.ibm.com (localhost [127.0.0.1]) by d24av01.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u7BN8XmT027049 for ; Thu, 11 Aug 2016 20:08:34 -0300 From: Thiago Jung Bauermann Subject: [PATCH v5 03/13] kexec_file: Factor out kexec_locate_mem_hole from kexec_add_buffer. Date: Thu, 11 Aug 2016 20:08:08 -0300 In-Reply-To: <1470956898-5991-1-git-send-email-bauerman@linux.vnet.ibm.com> References: <1470956898-5991-1-git-send-email-bauerman@linux.vnet.ibm.com> Message-Id: <1470956898-5991-4-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: kexec@lists.infradead.org Cc: Stewart Smith , Benjamin Herrenschmidt , Baoquan He , linuxppc-dev@lists.ozlabs.org, x86@kernel.org, "H. Peter Anvin" , linux-kernel@vger.kernel.org, Ingo Molnar , Paul Mackerras , Eric Biederman , Michael Ellerman , Thiago Jung Bauermann , Thomas Gleixner , Dave Young , Andrew Morton , Vivek Goyal kexec_locate_mem_hole will be used by the PowerPC kexec_file_load implementation to find free memory for the purgatory stack. Signed-off-by: Thiago Jung Bauermann Acked-by: Dave Young --- include/linux/kexec.h | 1 + kernel/kexec_file.c | 25 ++++++++++++++++++++----- 2 files changed, 21 insertions(+), 5 deletions(-) diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 28bc9f335d0d..ceccc5856aab 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -176,6 +176,7 @@ struct kexec_buf { int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf, int (*func)(u64, u64, void *)); extern int kexec_add_buffer(struct kexec_buf *kbuf); +int kexec_locate_mem_hole(struct kexec_buf *kbuf); int __weak arch_kexec_verify_buffer(enum kexec_file_type type, const void *buf, unsigned long size); #endif /* CONFIG_KEXEC_FILE */ diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index 58818264ad0e..772cb491715e 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -524,6 +524,23 @@ int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf, } /** + * kexec_locate_mem_hole - find free memory for the purgatory or the next kernel + * @kbuf: Parameters for the memory search. + * + * On success, kbuf->mem will have the start address of the memory region found. + * + * Return: 0 on success, negative errno on error. + */ +int kexec_locate_mem_hole(struct kexec_buf *kbuf) +{ + int ret; + + ret = arch_kexec_walk_mem(kbuf, locate_mem_hole_callback); + + return ret == 1 ? 0 : -EADDRNOTAVAIL; +} + +/** * kexec_add_buffer - place a buffer in a kexec segment * @kbuf: Buffer contents and memory parameters. * @@ -563,11 +580,9 @@ int kexec_add_buffer(struct kexec_buf *kbuf) kbuf->buf_align = max(kbuf->buf_align, PAGE_SIZE); /* Walk the RAM ranges and allocate a suitable range for the buffer */ - ret = arch_kexec_walk_mem(kbuf, locate_mem_hole_callback); - if (ret != 1) { - /* A suitable memory range could not be found for buffer */ - return -EADDRNOTAVAIL; - } + ret = kexec_locate_mem_hole(kbuf); + if (ret) + return ret; /* Found a suitable memory range */ ksegment = &kbuf->image->segment[kbuf->image->nr_segments]; -- 1.9.1 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec