From: tip-bot for Stefano Stabellini <stefano.stabellini@eu.citrix.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org,
yinghai@kernel.org, tglx@linutronix.de, hpa@linux.intel.com,
stefano.stabellini@eu.citrix.com
Subject: [tip:x86/mm2] x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
Date: Wed, 21 Nov 2012 18:06:47 -0800 [thread overview]
Message-ID: <tip-ddd3509df8f8d4f1cf4784f559d702ce00dc8846@git.kernel.org> (raw)
In-Reply-To: <1353123563-3103-29-git-send-email-yinghai@kernel.org>
Commit-ID: ddd3509df8f8d4f1cf4784f559d702ce00dc8846
Gitweb: http://git.kernel.org/tip/ddd3509df8f8d4f1cf4784f559d702ce00dc8846
Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
AuthorDate: Fri, 16 Nov 2012 19:39:05 -0800
Committer: H. Peter Anvin <hpa@linux.intel.com>
CommitDate: Sat, 17 Nov 2012 11:59:28 -0800
x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
Add link for more information
279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve
-v2: updated to commets from hpa to include commit name.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-29-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---
arch/x86/mm/init.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 02cea14..cb4f8ba 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -25,6 +25,15 @@ unsigned long __meminitdata pgt_buf_top;
static unsigned long min_pfn_mapped;
+/*
+ * Pages returned are already directly mapped.
+ *
+ * Changing that is likely to break Xen, see commit:
+ *
+ * 279b706 x86,xen: introduce x86_init.mapping.pagetable_reserve
+ *
+ * for detailed information.
+ */
__ref void *alloc_low_pages(unsigned int num)
{
unsigned long pfn;
next prev parent reply other threads:[~2012-11-22 18:58 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-17 3:38 [PATCH v8 00/46] x86, mm: map ram from top-down with BRK and memblock Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 01/46] x86, mm: Add global page_size_mask and probe one time only Yinghai Lu
2012-11-22 1:38 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 02/46] x86, mm: Split out split_mem_range from init_memory_mapping Yinghai Lu
2012-11-22 1:39 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 03/46] x86, mm: Move down find_early_table_space() Yinghai Lu
2012-11-22 1:40 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 16:50 ` [PATCH v8 03/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 04/46] x86, mm: Move init_memory_mapping calling out of setup.c Yinghai Lu
2012-11-22 1:41 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 16:50 ` [PATCH v8 04/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 05/46] x86, mm: Revert back good_end setting for 64bit Yinghai Lu
2012-11-22 1:42 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 06/46] x86, mm: Change find_early_table_space() paramters Yinghai Lu
2012-11-22 1:43 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 16:50 ` [PATCH v8 06/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 07/46] x86, mm: Find early page table buffer together Yinghai Lu
2012-11-22 1:44 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 16:50 ` [PATCH v8 07/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 08/46] x86, mm: Separate out calculate_table_space_size() Yinghai Lu
2012-11-22 1:45 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 16:59 ` [PATCH v8 08/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 09/46] x86, mm: Set memblock initial limit to 1M Yinghai Lu
2012-11-22 1:46 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 10/46] x86, mm: if kernel .text .data .bss are not marked as E820_RAM, complain and fix Yinghai Lu
2012-11-22 1:47 ` [tip:x86/mm2] " tip-bot for Jacob Shin
2012-11-17 3:38 ` [PATCH v8 11/46] x86, mm: Fixup code testing if a pfn is direct mapped Yinghai Lu
2012-11-22 1:48 ` [tip:x86/mm2] " tip-bot for Jacob Shin
2012-11-17 3:38 ` [PATCH v8 12/46] x86, mm: use pfn_range_is_mapped() with CPA Yinghai Lu
2012-11-22 1:49 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 17:06 ` [PATCH v8 12/46] " Konrad Rzeszutek Wilk
2012-11-28 19:33 ` Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 13/46] x86, mm: use pfn_range_is_mapped() with gart Yinghai Lu
2012-11-22 1:50 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 17:07 ` [PATCH v8 13/46] " Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 14/46] x86, mm: use pfn_range_is_mapped() with reserve_initrd Yinghai Lu
2012-11-22 1:51 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 17:08 ` [PATCH v8 14/46] " Konrad Rzeszutek Wilk
2012-11-28 19:40 ` Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 15/46] x86, mm: Only direct map addresses that are marked as E820_RAM Yinghai Lu
2012-11-22 1:53 ` [tip:x86/mm2] " tip-bot for Jacob Shin
2012-11-28 17:15 ` [PATCH v8 15/46] " Konrad Rzeszutek Wilk
2012-11-28 19:43 ` Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 16/46] x86, mm: relocate initrd under all mem for 64bit Yinghai Lu
2012-11-22 1:54 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 17/46] x86, mm: Align start address to correct big page size Yinghai Lu
2012-11-22 1:55 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 18/46] x86, mm: Use big page size for small memory range Yinghai Lu
2012-11-22 1:56 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 19/46] x86, mm: Don't clear page table if range is ram Yinghai Lu
2012-11-22 1:57 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 20/46] x86, mm: Break down init_all_memory_mapping Yinghai Lu
2012-11-22 1:58 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:38 ` [PATCH v8 21/46] x86, mm: setup page table in top-down Yinghai Lu
2012-11-22 1:59 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 17:50 ` [PATCH v8 21/46] " Konrad Rzeszutek Wilk
2012-11-28 20:16 ` Yinghai Lu
2012-12-05 21:53 ` Konrad Rzeszutek Wilk
2012-11-17 3:38 ` [PATCH v8 22/46] x86, mm: Remove early_memremap workaround for page table accessing on 64bit Yinghai Lu
2012-11-22 2:00 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 18:57 ` [PATCH v8 22/46] " Konrad Rzeszutek Wilk
2012-11-17 3:39 ` [PATCH v8 23/46] x86, mm: Remove parameter in alloc_low_page for 64bit Yinghai Lu
2012-11-22 2:01 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 18:57 ` [PATCH v8 23/46] " Konrad Rzeszutek Wilk
2012-11-17 3:39 ` [PATCH v8 24/46] x86, mm: Merge alloc_low_page between 64bit and 32bit Yinghai Lu
2012-11-22 2:02 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 25/46] x86, mm: Move min_pfn_mapped back to mm/init.c Yinghai Lu
2012-11-22 2:03 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 26/46] x86, mm, Xen: Remove mapping_pagetable_reserve() Yinghai Lu
2012-11-22 2:04 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 27/46] x86, mm: Add alloc_low_pages(num) Yinghai Lu
2012-11-22 2:05 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 28/46] x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages Yinghai Lu
2012-11-22 2:06 ` tip-bot for Stefano Stabellini [this message]
2012-11-17 3:39 ` [PATCH v8 29/46] x86, mm: only call early_ioremap_page_table_range_init() once Yinghai Lu
2012-11-22 2:07 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 19:02 ` [PATCH v8 29/46] " Konrad Rzeszutek Wilk
2012-11-17 3:39 ` [PATCH v8 30/46] x86, mm: Move back pgt_buf_* to mm/init.c Yinghai Lu
2012-11-22 2:08 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 31/46] x86, mm: Move init_gbpages() out of setup.c Yinghai Lu
2012-11-22 2:09 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 32/46] x86, mm: change low/hignmem_pfn_init to static on 32bit Yinghai Lu
2012-11-22 2:10 ` [tip:x86/mm2] x86, mm: change low/ hignmem_pfn_init " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 33/46] x86, mm: Move function declaration into mm_internal.h Yinghai Lu
2012-11-22 2:11 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 34/46] x86, mm: Add check before clear pte above max_low_pfn on 32bit Yinghai Lu
2012-11-22 2:13 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 19:09 ` [PATCH v8 34/46] " Konrad Rzeszutek Wilk
2012-11-28 20:38 ` Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 35/46] x86, mm: use round_up/down in split_mem_range() Yinghai Lu
2012-11-22 2:14 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 36/46] x86, mm: use PFN_DOWN " Yinghai Lu
2012-11-22 2:15 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 37/46] x86, mm: use pfn instead of pos in split_mem_range Yinghai Lu
2012-11-22 2:16 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 38/46] x86, mm: use limit_pfn for end pfn Yinghai Lu
2012-11-22 2:17 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 39/46] x86, mm: Unifying after_bootmem for 32bit and 64bit Yinghai Lu
2012-11-22 2:18 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 40/46] x86, mm: Move after_bootmem to mm_internel.h Yinghai Lu
2012-11-22 2:19 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 41/46] x86, mm: Use clamp_t() in init_range_memory_mapping Yinghai Lu
2012-11-22 2:20 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 42/46] x86, mm: kill numa_free_all_bootmem() Yinghai Lu
2012-11-22 2:21 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 43/46] x86, mm: kill numa_64.h Yinghai Lu
2012-11-22 2:22 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 44/46] sparc, mm: Remove calling of free_all_bootmem_node() Yinghai Lu
2012-11-22 2:23 ` [tip:x86/mm2] sparc, mm: Remove calling of free_all_bootmem_node( ) tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 45/46] mm: Kill NO_BOOTMEM version free_all_bootmem_node() Yinghai Lu
2012-11-22 2:24 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-17 3:39 ` [PATCH v8 46/46] x86, mm: Let "memmap=" take more entries one time Yinghai Lu
2012-11-22 2:25 ` [tip:x86/mm2] " tip-bot for Yinghai Lu
2012-11-28 19:12 ` [PATCH v8 46/46] " Konrad Rzeszutek Wilk
2012-11-27 21:17 ` [PATCH v8 00/46] x86, mm: map ram from top-down with BRK and memblock Konrad Rzeszutek Wilk
2012-11-28 19:35 ` Konrad Rzeszutek Wilk
2012-11-28 19:47 ` Yinghai Lu
2012-11-28 20:57 ` Konrad Rzeszutek Wilk
2012-11-28 21:06 ` Yinghai Lu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=tip-ddd3509df8f8d4f1cf4784f559d702ce00dc8846@git.kernel.org \
--to=stefano.stabellini@eu.citrix.com \
--cc=hpa@linux.intel.com \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=tglx@linutronix.de \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).