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From: Kevin Brodsky <kevin.brodsky@arm.com>
To: linux-hardening@vger.kernel.org
Cc: Kevin Brodsky <kevin.brodsky@arm.com>,
	 Andrew Morton <akpm@linux-foundation.org>,
	 Andy Lutomirski <luto@kernel.org>,
	 Catalin Marinas <catalin.marinas@arm.com>,
	 Dave Hansen <dave.hansen@linux.intel.com>,
	 "David Hildenbrand (Arm)" <david@kernel.org>,
	 Ira Weiny <ira.weiny@intel.com>, Jann Horn <jannh@google.com>,
	 Jeff Xu <jeffxu@chromium.org>, Joey Gouly <joey.gouly@arm.com>,
	 Kees Cook <kees@kernel.org>, Linus Walleij <linusw@kernel.org>,
	 Marc Zyngier <maz@kernel.org>, Mark Brown <broonie@kernel.org>,
	 Matthew Wilcox <willy@infradead.org>,
	Maxwell Bland <mbland@motorola.com>,
	 "Mike Rapoport (IBM)" <rppt@kernel.org>,
	 Peter Zijlstra <peterz@infradead.org>,
	 Pierre Langlois <pierre.langlois@arm.com>,
	 Quentin Perret <qperret@google.com>,
	 Rick Edgecombe <rick.p.edgecombe@intel.com>,
	 Ryan Roberts <ryan.roberts@arm.com>,
	Vlastimil Babka <vbabka@kernel.org>,
	 Will Deacon <will@kernel.org>,
	Yang Shi <yang@os.amperecomputing.com>,
	 Yeoreum Yun <yeoreum.yun@arm.com>,
	linux-arm-kernel@lists.infradead.org,  linux-mm@kvack.org,
	x86@kernel.org, Lorenzo Stoakes <ljs@kernel.org>,
	 Thomas Gleixner <tglx@kernel.org>
Subject: [PATCH RFC v8 10/24] memblock: Move INIT_MEMBLOCK_* macros to header
Date: Tue, 26 May 2026 12:15:59 +0100	[thread overview]
Message-ID: <20260526-kpkeys-v8-10-eaaacdacc67c@arm.com> (raw)
In-Reply-To: <20260526-kpkeys-v8-0-eaaacdacc67c@arm.com>

The upcoming page table allocator for the kpkeys_hardened_pgtables
feature will need to know the maximum number of memblock regions.
Move the corresponding macros to <linux/memblock.h> to allow that.

INIT_MEMBLOCK_{RESERVED,MEMORY}_REGIONS may be overridden, but this
should be fine as only arm64 and loong currently do that and the
relevant header is already (indirectly) included by
<linux/memblock.h>.

Signed-off-by: Kevin Brodsky <kevin.brodsky@arm.com>
---
 include/linux/memblock.h | 11 +++++++++++
 mm/memblock.c            | 11 -----------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index b0f750d22a7b..e58b2c859b95 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -24,6 +24,17 @@ extern unsigned long max_pfn;
  */
 extern unsigned long long max_possible_pfn;
 
+#define INIT_MEMBLOCK_REGIONS			128
+#define INIT_PHYSMEM_REGIONS			4
+
+#ifndef INIT_MEMBLOCK_RESERVED_REGIONS
+#define INIT_MEMBLOCK_RESERVED_REGIONS		INIT_MEMBLOCK_REGIONS
+#endif
+
+#ifndef INIT_MEMBLOCK_MEMORY_REGIONS
+#define INIT_MEMBLOCK_MEMORY_REGIONS		INIT_MEMBLOCK_REGIONS
+#endif
+
 /**
  * enum memblock_flags - definition of memory region attributes
  * @MEMBLOCK_NONE: no special request
diff --git a/mm/memblock.c b/mm/memblock.c
index a6a1c91e276d..e64ad9c72dc3 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -30,17 +30,6 @@
 
 #include "internal.h"
 
-#define INIT_MEMBLOCK_REGIONS			128
-#define INIT_PHYSMEM_REGIONS			4
-
-#ifndef INIT_MEMBLOCK_RESERVED_REGIONS
-# define INIT_MEMBLOCK_RESERVED_REGIONS		INIT_MEMBLOCK_REGIONS
-#endif
-
-#ifndef INIT_MEMBLOCK_MEMORY_REGIONS
-#define INIT_MEMBLOCK_MEMORY_REGIONS		INIT_MEMBLOCK_REGIONS
-#endif
-
 /**
  * DOC: memblock overview
  *

-- 
2.51.2



  parent reply	other threads:[~2026-05-26 11:17 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-26 11:15 [PATCH RFC v8 00/24] pkeys-based page table hardening Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 01/24] mm: Introduce kpkeys Kevin Brodsky
2026-05-26 13:17   ` Linus Walleij
2026-05-27  8:24     ` Kevin Brodsky
2026-06-16 15:32       ` David Hildenbrand (Arm)
2026-06-16 15:19   ` David Hildenbrand (Arm)
2026-05-26 11:15 ` [PATCH RFC v8 02/24] set_memory: Introduce set_memory_pkey() stub Kevin Brodsky
2026-06-16 15:41   ` David Hildenbrand (Arm)
2026-05-26 11:15 ` [PATCH RFC v8 03/24] arm64: mm: Enable overlays for all EL1 indirect permissions Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 04/24] arm64: Introduce por_elx_set_pkey_perms() helper Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 05/24] arm64: Implement asm/kpkeys.h using POE Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 06/24] arm64: set_memory: Implement set_memory_pkey() Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 07/24] arm64: Context-switch POR_EL1 Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 08/24] arm64: Initialize POR_EL1 register on cpu_resume() Kevin Brodsky
2026-05-26 11:15 ` [PATCH RFC v8 09/24] arm64: Enable kpkeys Kevin Brodsky
2026-05-26 11:15 ` Kevin Brodsky [this message]
2026-05-26 11:16 ` [PATCH RFC v8 11/24] mm: kpkeys: Introduce kpkeys_hardened_pgtables feature Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 12/24] mm: kpkeys: Protect regular page tables Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 13/24] mm: kpkeys: Introduce early page table allocator Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 14/24] mm: kpkeys: Protect vmemmap page tables Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 15/24] mm: kpkeys: Introduce hook for protecting static " Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 16/24] arm64: kpkeys: Implement arch_supports_kpkeys_early() Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 17/24] arm64: kpkeys: Support KPKEYS_CTX_PGTABLES Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 18/24] arm64: kpkeys: Ensure the linear map can be modified Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 19/24] arm64: kpkeys: Protect early page tables Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 20/24] arm64: kpkeys: Protect init_pg_dir Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 21/24] arm64: kpkeys: Guard page table writes Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 22/24] arm64: kpkeys: Batch KPKEYS_CTX_PGTABLES switches Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 23/24] arm64: kpkeys: Enable kpkeys_hardened_pgtables support Kevin Brodsky
2026-05-26 11:16 ` [PATCH RFC v8 24/24] mm: Add basic tests for kpkeys_hardened_pgtables Kevin Brodsky

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