From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Wed, 16 Nov 2011 16:48:10 +0000 Subject: [PATCH 0/4] Consolidate identity mapping code in idmap.c Message-ID: <1321462094-6647-1-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, This patch series consolidates the identity mapping code into idmap.c, where a single set of page tables (idmap_pgd) are allocated and populated at init time for use by subsystems such as soft reboot, kexec and CPU suspend. A new linker section (.idmap.text) is introduced so that code which needs to be identity mapped can be annotated with __idmap or, if written in assembly, placed there explicitly. CPU suspend, cpu_*_reset and setup_mm_for_reboot are all updated to work with the new mapping code. This is currently based on 3.2-rc2, but will be based on Russell's reset branch when it comes to merging (where the prototype of setup_mm_for_reboot has changed slightly). Furthermore, I have rebased my kexec series against this which I will post separately. Comments welcome. Cheers, Will Will Deacon (4): ARM: idmap: populate identity map pgd at init time using .init.text ARM: suspend: use idmap_pgd instead of suspend_pgd ARM: proc-*.S: place cpu_reset functions into .idmap.text section ARM: idmap: use idmap_pgd when setting up mm for reboot arch/arm/include/asm/idmap.h | 11 ++++++++ arch/arm/kernel/sleep.S | 2 + arch/arm/kernel/suspend.c | 17 ++---------- arch/arm/kernel/vmlinux.lds.S | 1 + arch/arm/mm/idmap.c | 49 ++++++++++++++++++++++++++++++------- arch/arm/mm/proc-arm1020.S | 3 ++ arch/arm/mm/proc-arm1020e.S | 3 ++ arch/arm/mm/proc-arm1022.S | 3 ++ arch/arm/mm/proc-arm1026.S | 3 ++ arch/arm/mm/proc-arm6_7.S | 4 +++ arch/arm/mm/proc-arm720.S | 3 ++ arch/arm/mm/proc-arm740.S | 3 ++ arch/arm/mm/proc-arm7tdmi.S | 3 ++ arch/arm/mm/proc-arm920.S | 3 ++ arch/arm/mm/proc-arm922.S | 3 ++ arch/arm/mm/proc-arm925.S | 3 ++ arch/arm/mm/proc-arm926.S | 3 ++ arch/arm/mm/proc-arm940.S | 3 ++ arch/arm/mm/proc-arm946.S | 3 ++ arch/arm/mm/proc-arm9tdmi.S | 3 ++ arch/arm/mm/proc-fa526.S | 3 ++ arch/arm/mm/proc-feroceon.S | 3 ++ arch/arm/mm/proc-mohawk.S | 3 ++ arch/arm/mm/proc-sa110.S | 3 ++ arch/arm/mm/proc-sa1100.S | 3 ++ arch/arm/mm/proc-v6.S | 3 ++ arch/arm/mm/proc-v7.S | 2 + arch/arm/mm/proc-xsc3.S | 3 ++ arch/arm/mm/proc-xscale.S | 3 ++ include/asm-generic/vmlinux.lds.h | 6 ++++ 30 files changed, 135 insertions(+), 23 deletions(-) create mode 100644 arch/arm/include/asm/idmap.h -- 1.7.4.1