linux-kernel - [PATCH] mm/execmem: Make ARCH_WANTS_EXECMEM

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Message-Id: <20241209031251.515903-1-anshuman.khandual@arm.com>
Date: Mon,  9 Dec 2024 08:42:51 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-mm@...ck.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <kees@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mm/execmem: Make ARCH_WANTS_EXECMEM_LATE depend on EXECMEM

Late initialisation of EXECMEM inherently requires EXEMEM itself, and hence
this dependency should not be left with the subscribing platforms.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Kees Cook <kees@...nel.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-mm@...ck.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
This patch applies on v6.13-rc1

 arch/Kconfig       | 1 +
 arch/arm64/Kconfig | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/Kconfig b/arch/Kconfig
index 6682b2a53e34..17716f32dc44 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -1058,6 +1058,7 @@ config ARCH_WANTS_MODULES_DATA_IN_VMALLOC
 
 config ARCH_WANTS_EXECMEM_LATE
 	bool
+	depends on EXECMEM
 	help
 	  For architectures that do not allocate executable memory early on
 	  boot, but rather require its initialization late when there is
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b5479c8b454c..b146372bc365 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -113,7 +113,7 @@ config ARM64
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
 	select ARCH_WANT_LD_ORPHAN_WARN
-	select ARCH_WANTS_EXECMEM_LATE if EXECMEM
+	select ARCH_WANTS_EXECMEM_LATE
 	select ARCH_WANTS_NO_INSTR
 	select ARCH_WANTS_THP_SWAP if ARM64_4K_PAGES
 	select ARCH_HAS_UBSAN
-- 
2.30.2