linux-kernel - [PATCH part3 0/5] acpi, acpica: Initialize acpi_gbl_root_table

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 8 Aug 2013 16:54:01 +0800
From:	Tang Chen <tangchen@...fujitsu.com>
To:	robert.moore@...el.com, lv.zheng@...el.com, rjw@...k.pl,
	lenb@...nel.org, tglx@...utronix.de, mingo@...e.hu, hpa@...or.com,
	akpm@...ux-foundation.org, tj@...nel.org, trenn@...e.de,
	yinghai@...nel.org, jiang.liu@...wei.com, wency@...fujitsu.com,
	laijs@...fujitsu.com, isimatu.yasuaki@...fujitsu.com,
	izumi.taku@...fujitsu.com, mgorman@...e.de, minchan@...nel.org,
	mina86@...a86.com, gong.chen@...ux.intel.com,
	vasilis.liaskovitis@...fitbricks.com, lwoodman@...hat.com,
	riel@...hat.com, jweiner@...hat.com, prarit@...hat.com,
	zhangyanfei@...fujitsu.com, yanghy@...fujitsu.com
Cc:	x86@...nel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-acpi@...r.kernel.org
Subject: [PATCH part3 0/5] acpi, acpica: Initialize acpi_gbl_root_table_list earlier and override it later.

In order to prevent bootmem allocator (memblock) from allocating hotpluggable 
memory for the kernel, we need to obtain SRAT earlier.

In part1 patch-set, we have split acpi_gbl_root_table_list initialization into
two steps: install and override.

This patch-set will do install step earlier. This will help us to find SRAT provided 
by firmware earlier in later patches. 

The current kernel looks like this:

setup_arch()
 |->acpi_initrd_override()         /* Find all tables specified by users in initrd,
 |                                    and store them in acpi_tables_addr array. */
 |......
 |->acpi_boot_table_init()         /* Find all tables in firmware and install them
                                      into acpi_gbl_root_table_list. Check acpi_tables_addr,
                                      if any table needs to be overrided, override it. */

After this patch-set, the kernel will look like this:

setup_arch()
 |->early_acpi_boot_table_init()   /* Find all tables in firmware and install them 
 |                                    into acpi_gbl_root_table_list. No override. */
 |
 |->acpi_initrd_override()         /* Find all tables specified by users in initrd,
 |                                    and store them in acpi_tables_addr array. */
 |......
 |->acpi_boot_table_init()         /* Check acpi_tables_addr, if any table needs to 
                                      be overrided, override it. */


Tang Chen (5):
  x86, acpi: Call two new functions instead of acpi_initialize_tables()
    in acpi_table_init().
  x86, acpi: Split acpi_table_init() into two parts.
  x86, acpi: Rename check_multiple_madt() and make it global.
  x86, acpi: Split acpi_boot_table_init() into two parts.
  x86, acpi: Initialize acpi golbal root table list earlier.

 arch/x86/kernel/acpi/boot.c |   32 ++++++++++++++++++++------------
 arch/x86/kernel/setup.c     |    8 +++++++-
 drivers/acpi/tables.c       |   29 +++++++++++++++++++++++------
 include/acpi/acpixf.h       |    4 ++++
 include/linux/acpi.h        |    4 ++++
 5 files changed, 58 insertions(+), 19 deletions(-)

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/