From: Yinghai Lu <yinghai@kernel.org> To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>, Andrew Morton <akpm@linux-foundation.org>, David Miller <davem@davemloft.net>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Linus Torvalds <torvalds@linux-foundation.org> Cc: Johannes Weiner <hannes@cmpxchg.org>, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu <yinghai@kernel.org> Subject: [PATCH 28/33] x86: Align e820 ram range to page Date: Tue, 30 Mar 2010 19:17:13 -0700 [thread overview] Message-ID: <1270001838-15857-29-git-send-email-yinghai@kernel.org> (raw) In-Reply-To: <1270001838-15857-1-git-send-email-yinghai@kernel.org> to workaround wrong BIOS memory map. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- arch/x86/kernel/e820.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e2a0b02..57c938a 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -910,6 +910,47 @@ static int __init parse_memmap_opt(char *p) } early_param("memmap", parse_memmap_opt); +static void __init e820_align_ram_page(void) +{ + int i; + bool changed = false;; + + for (i = 0; i < e820.nr_map; i++) { + struct e820entry *entry = &e820.map[i]; + u64 start, end; + u64 start_aligned, end_aligned; + + if (entry->type != E820_RAM) + continue; + + start = entry->addr; + end = start + entry->size; + + start_aligned = round_up(start, PAGE_SIZE); + end_aligned = round_down(end, PAGE_SIZE); + + if (end_aligned <= start_aligned) { + e820_update_range(start, end - start, E820_RAM, E820_RESERVED); + changed = true; + continue; + } + if (start < start_aligned) { + e820_update_range(start, start_aligned - start, E820_RAM, E820_RESERVED); + changed = true; + } + if (end_aligned < end) { + e820_update_range(end_aligned, end - end_aligned, E820_RAM, E820_RESERVED); + changed = true; + } + } + + if (changed) { + sanitize_e820_map(); + printk(KERN_INFO "aligned physical RAM map:\n"); + e820_print_map("aligned"); + } +} + void __init finish_e820_parsing(void) { if (userdef) { @@ -922,6 +963,9 @@ void __init finish_e820_parsing(void) printk(KERN_INFO "user-defined physical RAM map:\n"); e820_print_map("user"); } + + /* In case, We have RAM entres that are not PAGE aligned */ + e820_align_ram_page(); } static inline const char *e820_type_to_string(int e820_type) -- 1.6.4.2
WARNING: multiple messages have this Message-ID (diff)
From: Yinghai Lu <yinghai@kernel.org> To: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>, "H. Peter Anvin" <hpa@zytor.com>, Andrew Morton <akpm@linux-foundation.org>, David Miller <davem@davemloft.net>, Be Cc: Johannes Weiner <hannes@cmpxchg.org>, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu <yinghai@kernel.org> Subject: [PATCH 28/33] x86: Align e820 ram range to page Date: Tue, 30 Mar 2010 19:17:13 -0700 [thread overview] Message-ID: <1270001838-15857-29-git-send-email-yinghai@kernel.org> (raw) In-Reply-To: <1270001838-15857-1-git-send-email-yinghai@kernel.org> to workaround wrong BIOS memory map. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- arch/x86/kernel/e820.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 44 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e2a0b02..57c938a 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -910,6 +910,47 @@ static int __init parse_memmap_opt(char *p) } early_param("memmap", parse_memmap_opt); +static void __init e820_align_ram_page(void) +{ + int i; + bool changed = false;; + + for (i = 0; i < e820.nr_map; i++) { + struct e820entry *entry = &e820.map[i]; + u64 start, end; + u64 start_aligned, end_aligned; + + if (entry->type != E820_RAM) + continue; + + start = entry->addr; + end = start + entry->size; + + start_aligned = round_up(start, PAGE_SIZE); + end_aligned = round_down(end, PAGE_SIZE); + + if (end_aligned <= start_aligned) { + e820_update_range(start, end - start, E820_RAM, E820_RESERVED); + changed = true; + continue; + } + if (start < start_aligned) { + e820_update_range(start, start_aligned - start, E820_RAM, E820_RESERVED); + changed = true; + } + if (end_aligned < end) { + e820_update_range(end_aligned, end - end_aligned, E820_RAM, E820_RESERVED); + changed = true; + } + } + + if (changed) { + sanitize_e820_map(); + printk(KERN_INFO "aligned physical RAM map:\n"); + e820_print_map("aligned"); + } +} + void __init finish_e820_parsing(void) { if (userdef) { @@ -922,6 +963,9 @@ void __init finish_e820_parsing(void) printk(KERN_INFO "user-defined physical RAM map:\n"); e820_print_map("user"); } + + /* In case, We have RAM entres that are not PAGE aligned */ + e820_align_ram_page(); } static inline const char *e820_type_to_string(int e820_type) -- 1.6.4.2
next prev parent reply other threads:[~2010-03-31 2:28 UTC|newest] Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top 2010-03-31 2:16 [PATCH -v11 00/33] use lmb with x86 Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 01/33] x86: Make e820_remove_range() to handle all covered case Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 02/33] lmb: Move lmb.c to mm/ Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 03/33] lmb: Seperate region array from lmb_region struct Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 04/33] lmb: Seperate __lmb_find_base() from __lmb_alloc_base() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 05/33] lmb: Add lmb_find_area() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 06/33] lmb: Add lmb_reserve_area/lmb_free_area Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-04-07 23:35 ` Michael Ellerman 2010-04-07 23:36 ` Yinghai 2010-03-31 2:16 ` [PATCH 07/33] bootmem, x86: Add weak version of reserve_bootmem_generic Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 08/33] lmb: Add lmb_to_bootmem() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 09/33] lmb: Add get_free_all_memory_range() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 10/33] lmb: Add lmb_register_active_regions() and lmb_hole_size() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 11/33] lmb: Prepare to include linux/lmb.h in core file Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 12/33] lmb: Add find_memory_core_early() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 13/33] lmb: Add lmb_find_area_node() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:16 ` [PATCH 14/33] lmb: Add lmb_free_memory_size() Yinghai Lu 2010-03-31 2:16 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 15/33] lmb: Add lmb_memory_size() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 16/33] lmb: Add lmb_reserve_area_overlap_ok() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 17/33] lmb: Use lmb_debug to control debug message print out Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 18/33] lmb: Add ARCH_DISCARD_LMB to put lmb code to .init Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 19/33] x86: Add sanitize_e820_map() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 20/33] x86, lmb: Add lmb_find_area_size() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 21/33] x86, lmb: Add x86 version of __lmb_find_area() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 22/33] x86: Use lmb to replace early_res Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 23/33] x86: Replace e820_/_early string with lmb_ Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 24/33] nobootmem: use lmb.default_alloc_limit in alloc_bootmem path Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 25/33] x86, lmb: turn off ARCH_LMB_FIND_AREA Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-04-07 23:38 ` Michael Ellerman 2010-04-07 23:40 ` Yinghai 2010-03-31 2:17 ` [PATCH 26/33] x86: Remove not used early_res code Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 27/33] x86, lmb: Use lmb_memory_size()/lmb_free_memory_size() to get correct dma_reserve Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu [this message] 2010-03-31 2:17 ` [PATCH 28/33] x86: Align e820 ram range to page Yinghai Lu 2010-03-31 2:17 ` [PATCH 29/33] x86: Use wake_system_ram_range instead of e820_any_mapped in agp path Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 30/33] x86: Add get_centaur_ram_top() Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 31/33] x86: Change e820_any_mapped() to __init Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 32/33] x86: Use walk_system_ream_range() instead of referring e820.map directly for tboot Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu 2010-03-31 2:17 ` [PATCH 33/33] x86: make e820 to be __initdata Yinghai Lu 2010-03-31 2:17 ` Yinghai Lu
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