From patchwork Wed Feb 10 09:20:16 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yinghai Lu X-Patchwork-Id: 78356 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o1A9S5qP012007 for ; Wed, 10 Feb 2010 09:28:12 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755261Ab0BJJ1i (ORCPT ); Wed, 10 Feb 2010 04:27:38 -0500 Received: from sca-es-mail-1.Sun.COM ([192.18.43.132]:60052 "EHLO sca-es-mail-1.sun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752657Ab0BJJVx (ORCPT ); Wed, 10 Feb 2010 04:21:53 -0500 Received: from fe-sfbay-10.sun.com ([192.18.43.129]) by sca-es-mail-1.sun.com (8.13.7+Sun/8.12.9) with ESMTP id o1A9LrRc006767; Wed, 10 Feb 2010 01:21:53 -0800 (PST) MIME-version: 1.0 Content-transfer-encoding: 7BIT Content-type: TEXT/PLAIN Received: from conversion-daemon.fe-sfbay-10.sun.com by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) id <0KXM00700CGOJQ00@fe-sfbay-10.sun.com>; Wed, 10 Feb 2010 01:21:53 -0800 (PST) Received: from localhost.localdomain ([unknown] [75.36.246.78]) by fe-sfbay-10.sun.com (Sun Java(tm) System Messaging Server 7u2-7.04 64bit (built Jul 2 2009)) with ESMTPSA id <0KXM00EGECNZY760@fe-sfbay-10.sun.com>; Wed, 10 Feb 2010 01:21:52 -0800 (PST) Date: Wed, 10 Feb 2010 01:20:16 -0800 From: Yinghai Lu Subject: [PATCH 12/35] x86: introduce max_early_res and early_res_count In-reply-to: <1265793639-15071-1-git-send-email-yinghai@kernel.org> To: Ingo Molnar , Thomas Gleixner , "H. Peter Anvin" , Andrew Morton , Linus Torvalds Cc: Jesse Barnes , Christoph Lameter , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Yinghai Lu Message-id: <1265793639-15071-13-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.6.4.2 References: <1265793639-15071-1-git-send-email-yinghai@kernel.org> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Wed, 10 Feb 2010 09:28:12 +0000 (UTC) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index f406efe..7053f4a 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -732,14 +732,18 @@ core_initcall(e820_mark_nvs_memory); /* * Early reserved memory areas. */ -#define MAX_EARLY_RES 32 +/* + * need to make sure this one is bigger enough before + * find_e820_area could be used + */ +#define MAX_EARLY_RES_X 32 struct early_res { u64 start, end; - char name[16]; + char name[15]; char overlap_ok; }; -static struct early_res early_res[MAX_EARLY_RES] __initdata = { +static struct early_res early_res_x[MAX_EARLY_RES_X] __initdata = { { 0, PAGE_SIZE, "BIOS data page", 1 }, /* BIOS data page */ #if defined(CONFIG_X86_32) && defined(CONFIG_X86_TRAMPOLINE) /* @@ -753,12 +757,22 @@ static struct early_res early_res[MAX_EARLY_RES] __initdata = { {} }; +static int max_early_res __initdata = MAX_EARLY_RES_X; +static struct early_res *early_res __initdata = &early_res_x[0]; +static int early_res_count __initdata = +#ifdef CONFIG_X86_32 + 2 +#else + 1 +#endif + ; + static int __init find_overlapped_early(u64 start, u64 end) { int i; struct early_res *r; - for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) { + for (i = 0; i < max_early_res && early_res[i].end; i++) { r = &early_res[i]; if (end > r->start && start < r->end) break; @@ -776,13 +790,14 @@ static void __init drop_range(int i) { int j; - for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++) + for (j = i + 1; j < max_early_res && early_res[j].end; j++) ; memmove(&early_res[i], &early_res[i + 1], (j - 1 - i) * sizeof(struct early_res)); early_res[j - 1].end = 0; + early_res_count--; } /* @@ -801,9 +816,9 @@ static void __init drop_overlaps_that_are_ok(u64 start, u64 end) struct early_res *r; u64 lower_start, lower_end; u64 upper_start, upper_end; - char name[16]; + char name[15]; - for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) { + for (i = 0; i < max_early_res && early_res[i].end; i++) { r = &early_res[i]; /* Continue past non-overlapping ranges */ @@ -859,7 +874,7 @@ static void __init __reserve_early(u64 start, u64 end, char *name, struct early_res *r; i = find_overlapped_early(start, end); - if (i >= MAX_EARLY_RES) + if (i >= max_early_res) panic("Too many early reservations"); r = &early_res[i]; if (r->end) @@ -872,6 +887,7 @@ static void __init __reserve_early(u64 start, u64 end, char *name, r->overlap_ok = overlap_ok; if (name) strncpy(r->name, name, sizeof(r->name) - 1); + early_res_count++; } /* @@ -924,7 +940,7 @@ void __init free_early(u64 start, u64 end) i = find_overlapped_early(start, end); r = &early_res[i]; - if (i >= MAX_EARLY_RES || r->end != end || r->start != start) + if (i >= max_early_res || r->end != end || r->start != start) panic("free_early on not reserved area: %llx-%llx!", start, end - 1); @@ -935,14 +951,15 @@ void __init early_res_to_bootmem(u64 start, u64 end) { int i, count; u64 final_start, final_end; + int idx = 0; count = 0; - for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) + for (i = 0; i < max_early_res && early_res[i].end; i++) count++; - printk(KERN_INFO "(%d early reservations) ==> bootmem [%010llx - %010llx]\n", - count, start, end); - for (i = 0; i < count; i++) { + printk(KERN_INFO "(%d/%d early reservations) ==> bootmem [%010llx - %010llx]\n", + count - idx, max_early_res, start, end); + for (i = idx; i < count; i++) { struct early_res *r = &early_res[i]; printk(KERN_INFO " #%d [%010llx - %010llx] %16s", i, r->start, r->end, r->name); @@ -969,7 +986,7 @@ static inline int __init bad_addr(u64 *addrp, u64 size, u64 align) again: i = find_overlapped_early(addr, addr + size); r = &early_res[i]; - if (i < MAX_EARLY_RES && r->end) { + if (i < max_early_res && r->end) { *addrp = addr = round_up(r->end, align); changed = 1; goto again; @@ -986,7 +1003,7 @@ static inline int __init bad_addr_size(u64 *addrp, u64 *sizep, u64 align) int changed = 0; again: last = addr + size; - for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) { + for (i = 0; i < max_early_res && early_res[i].end; i++) { struct early_res *r = &early_res[i]; if (last > r->start && addr < r->start) { size = r->start - addr;