Re: [PATCHv3 0/4] x86: Make 5-level paging support unconditional for x86-64

[Borislav Petkov <bp@alien8.de>]

On Fri, May 16, 2025 at 03:33:02PM +0300, Kirill A. Shutemov wrote:
> Both Intel and AMD CPUs support 5-level paging, which is expected to
> become more widely adopted in the future.
> 
> Remove CONFIG_X86_5LEVEL.
> 
> In preparation to that remove CONFIG_DYNAMIC_MEMORY_LAYOUT and make
> SPARSEMEM_VMEMMAP the only memory model.
> 
> v3:
>  - Drop few "#if CONFIG_PGTABLE_LEVELS >= 5";
>  - Make PARAVIRT_XXL 64-bit explicitly and drop ifdefs
>    to support PGTABLE_LEVELS < 5;
>  - Add Reviewed-by tags from Ard;
> v2:
>  - Fix 32-bit build by wrapping p4d_set_huge() and p4d_clear_huge() in
>    #if CONFIG_PGTABLE_LEVELS > 4;
>  - Rebased onto current tip/master;
> 
> Kirill A. Shutemov (4):
>   x86/64/mm: Always use dynamic memory layout
>   x86/64/mm: Make SPARSEMEM_VMEMMAP the only memory model
>   x86/64/mm: Make 5-level paging support unconditional
>   x86/paravirt: Restrict PARAVIRT_XXL to 64-bit only

The whole set passed randbuilds testing here too, and am running boot tests on
my pile of stinky hw.

If it passes, we could queue it all.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette