linux-kernel - [PATCH 0/5] X86/XEN: Merge x86_init.paging.pagetable_setup_start and x86_init.paging.pagetable_setup

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Date:	Tue, 21 Aug 2012 02:14:01 +0100
From:	Attilio Rao <attilio.rao@...rix.com>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	Stefano Stabellini <Stefano.Stabellini@...citrix.com>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	<xen-devel@...ts.xensource.com>
CC:	Attilio Rao <attilio.rao@...rix.com>
Subject: [PATCH 0/5] X86/XEN: Merge x86_init.paging.pagetable_setup_start and x86_init.paging.pagetable_setup_done PVOPS and document the semantic

Currently the definition of x86_init.paging.pagetable_setup_start and
x86_init.paging.pagetable_setup_done is twisted and not really well
defined (in terms of prototypes desired). More specifically:
pagetable_setup_start:
 * it is a nop on x86_32
 * it is a nop for the XEN case
 * cleans up the boot time page table in the x86_64 case

pagetable_setup_done:
 * it is a nop on x86_32
 * sets up accessor functions for pagetable manipulation, for the
   XEN case
 * it is a nop on x86_64

Most of this logic can be skipped by creating a new PVOPS that can handle
pagetable setup and pre/post operations on it.
The new PVOPS must be called only once, during boot-time setup and
after the direct mapping for physical memory is available.

Attilio Rao (5):
  XEN: Remove the base argument from
    x86_init.paging.pagetable_setup_done PVOPS
  XEN: Remove the base argument from
    x86_init.paging.pagetable_setup_start PVOPS
  X86/XEN: Introduce the x86_init.paging.pagetable_init() PVOPS
  X86/XEN: Retire now unused x86_init.paging.pagetable_setup_start and
    x86_init.paging.pagetable_setup_done PVOPS
  X86/XEN: Add few lines explaining simple semantic for
    x86_init.paging.pagetable_init PVOPS

 arch/x86/include/asm/pgtable_types.h |    6 ++----
 arch/x86/include/asm/x86_init.h      |   11 +++++++----
 arch/x86/kernel/setup.c              |    4 +---
 arch/x86/kernel/x86_init.c           |    4 +---
 arch/x86/mm/init_32.c                |   12 ++++++------
 arch/x86/xen/mmu.c                   |   18 +++++++-----------
 6 files changed, 24 insertions(+), 31 deletions(-)

-- 
1.7.2.5

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