linux-kernel - [PATCH v3 5/5] mm: Add p{g/4}d_leaf() in asm-generic/pgtable-nop{4/u}d.h

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <7b6f39f3cc9823e0a058b27f50ad4f47b2e10979.1720854135.git.christophe.leroy@csgroup.eu>
Date: Sat, 13 Jul 2024 09:08:27 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Arnd Bergmann <arnd@...db.de>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-riscv@...ts.infradead.org,
	linux-arch@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linux-mips@...r.kernel.org,
	Peter Xu <peterx@...hat.com>
Subject: [PATCH v3 5/5] mm: Add p{g/4}d_leaf() in asm-generic/pgtable-nop{4/u}d.h

Commit 2c8a81dc0cc5 ("riscv/mm: fix two page table check related
issues") added pud_leaf() in include/asm-generic/pgtable-nopmd.h

Do the same for p4d_leaf() and pgd_leaf() to avoid getting them
erroneously defined by architectures that do not implement the
related page level.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
Reviewed-by: Peter Xu <peterx@...hat.com>
---
v2: Added pXd_leaf macro as well in asm-generic/pgtable-nopXd.h to cohabit with the fallback
---
 include/asm-generic/pgtable-nop4d.h | 2 ++
 include/asm-generic/pgtable-nopmd.h | 1 +
 include/asm-generic/pgtable-nopud.h | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/include/asm-generic/pgtable-nop4d.h b/include/asm-generic/pgtable-nop4d.h
index 03b7dae47dd4..ed7ba008469f 100644
--- a/include/asm-generic/pgtable-nop4d.h
+++ b/include/asm-generic/pgtable-nop4d.h
@@ -21,6 +21,8 @@ typedef struct { pgd_t pgd; } p4d_t;
 static inline int pgd_none(pgd_t pgd)		{ return 0; }
 static inline int pgd_bad(pgd_t pgd)		{ return 0; }
 static inline int pgd_present(pgd_t pgd)	{ return 1; }
+static inline int pgd_leaf(pgd_t pgd)		{ return 0; }
+#define pgd_leaf pgd_leaf
 static inline void pgd_clear(pgd_t *pgd)	{ }
 #define p4d_ERROR(p4d)				(pgd_ERROR((p4d).pgd))
 
diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h
index b01349a312fa..e178ace2e23e 100644
--- a/include/asm-generic/pgtable-nopmd.h
+++ b/include/asm-generic/pgtable-nopmd.h
@@ -31,6 +31,7 @@ static inline int pud_none(pud_t pud)		{ return 0; }
 static inline int pud_bad(pud_t pud)		{ return 0; }
 static inline int pud_present(pud_t pud)	{ return 1; }
 static inline int pud_leaf(pud_t pud)		{ return 0; }
+#define pud_leaf pud_leaf
 static inline void pud_clear(pud_t *pud)	{ }
 #define pmd_ERROR(pmd)				(pud_ERROR((pmd).pud))
 
diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h
index eb70c6d7ceff..655dfebea91c 100644
--- a/include/asm-generic/pgtable-nopud.h
+++ b/include/asm-generic/pgtable-nopud.h
@@ -28,6 +28,8 @@ typedef struct { p4d_t p4d; } pud_t;
 static inline int p4d_none(p4d_t p4d)		{ return 0; }
 static inline int p4d_bad(p4d_t p4d)		{ return 0; }
 static inline int p4d_present(p4d_t p4d)	{ return 1; }
+static inline int p4d_leaf(p4d_t p4d)		{ return 0; }
+#define p4d_leaf p4d_leaf
 static inline void p4d_clear(p4d_t *p4d)	{ }
 #define pud_ERROR(pud)				(p4d_ERROR((pud).p4d))
 
-- 
2.44.0