* Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx> > --- > 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
