lkml.org 
[lkml]   [2017]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 21/26] x86/mm: add support of additional page table level during early boot

    * Kirill A. Shutemov <kirill.shutemov@linux.intel.com> wrote:

    > This patch adds support for 5-level paging during early boot.
    > It generalizes boot for 4- and 5-level paging on 64-bit systems with
    > compile-time switch between them.
    >
    > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    > ---
    > arch/x86/boot/compressed/head_64.S | 23 +++++++++--
    > arch/x86/include/asm/pgtable.h | 2 +-
    > arch/x86/include/asm/pgtable_64.h | 6 ++-
    > arch/x86/include/uapi/asm/processor-flags.h | 2 +
    > arch/x86/kernel/espfix_64.c | 2 +-
    > arch/x86/kernel/head64.c | 40 +++++++++++++-----
    > arch/x86/kernel/head_64.S | 63 +++++++++++++++++++++--------

    Ok, here I'd like to have a C version instead of further complicating an already
    complex assembly version...

    I.e. the existing setup code should be converted to C in one patch, and then
    another patch should add 5-level paging support to the C code.

    See how this was done for the 32-bit setup code already:

    5a7670ee23f2 x86/boot/32: Convert the 32-bit pgtable setup code from assembly to C

    Also, please split it up into per boot path and topic, i.e. have a sparate patch
    for the Xen bits, the KASAN bits, the kexec extension, etc.

    Thanks,

    Ingo

    \
     
     \ /
      Last update: 2017-03-13 08:18    [W:7.331 / U:0.128 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site