x86/mm: set ARCH_WANT_SPARSEMEM_VMEMMAP_PREINIT

Now that hugetlb bootmem pages are allocated earlier, and available for
section preinit (HVO-style), set ARCH_WANT_SPARSEMEM_VMEMMAP_PREINIT for
x86_64, so that is can be done.

This enables pre-HVO on x86_64.

Link: https://lkml.kernel.org/r/20250218181656.207178-22-fvdl@google.com
Signed-off-by: Frank van der Linden <fvdl@google.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin (Cruise) <roman.gushchin@linux.dev>
Cc: Usama Arif <usamaarif642@gmail.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 39ecafffc7e325da2014895ec1c31aa3de56fd2d..be5e8e93c0f320739d46550cba38bd7981d3aab6 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -147,6 +147,7 @@ config X86
        select ARCH_WANT_LD_ORPHAN_WARN
        select ARCH_WANT_OPTIMIZE_DAX_VMEMMAP   if X86_64
        select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP       if X86_64
+       select ARCH_WANT_SPARSEMEM_VMEMMAP_PREINIT if X86_64
        select ARCH_WANTS_THP_SWAP              if X86_64
        select ARCH_HAS_PARANOID_L1D_FLUSH
        select BUILDTIME_TABLE_SORT