linux-kernel - [PATCH v2 22/28] x86/mm: set ARCH_WANT_SPARSEMEM_VMEMMAP

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Message-ID: <20250129224157.2046079-23-fvdl@google.com>
Date: Wed, 29 Jan 2025 22:41:51 +0000
From: Frank van der Linden <fvdl@...gle.com>
To: akpm@...ux-foundation.org, muchun.song@...ux.dev, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Cc: yuzhao@...gle.com, usamaarif642@...il.com, joao.m.martins@...cle.com, 
	roman.gushchin@...ux.dev, Frank van der Linden <fvdl@...gle.com>
Subject: [PATCH v2 22/28] 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.

Signed-off-by: Frank van der Linden <fvdl@...gle.com>
---
 arch/x86/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 87198d957e2f..ccef99c0a2ba 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -146,6 +146,7 @@ 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
-- 
2.48.1.262.g85cc9f2d1e-goog