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From: Andrew Donnellan <ajd@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: x86@kernel.org, linux-mm@kvack.org,
	linux-riscv@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com,
	sweettea-kernel@dorminy.me, christophe.leroy@csgroup.eu
Subject: [PATCH v14 08/11] powerpc: mm: Add pud_pfn() stub
Date: Fri, 11 Apr 2025 15:43:51 +1000	[thread overview]
Message-ID: <20250411054354.511145-9-ajd@linux.ibm.com> (raw)
In-Reply-To: <20250411054354.511145-1-ajd@linux.ibm.com>

From: Rohan McLure <rmclure@linux.ibm.com>

The page table check feature requires that pud_pfn() be defined
on each consuming architecture. Since only 64-bit, Book3S platforms
allow for hugepages at this upper level, and since the calling code is
gated by a call to pud_user_accessible_page(), which will return zero,
include this stub as a BUILD_BUG().

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
---
 arch/powerpc/include/asm/pgtable.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 2f72ad885332..bb43e4f46367 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -215,6 +215,15 @@ static inline bool arch_supports_memmap_on_memory(unsigned long vmemmap_size)
 
 #endif /* CONFIG_PPC64 */
 
+#ifndef pud_pfn
+#define pud_pfn pud_pfn
+static inline int pud_pfn(pud_t pud)
+{
+	BUILD_BUG();
+	return 0;
+}
+#endif
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_POWERPC_PGTABLE_H */
-- 
2.49.0



WARNING: multiple messages have this Message-ID (diff)
From: Andrew Donnellan <ajd@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: x86@kernel.org, linux-mm@kvack.org,
	linux-riscv@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com,
	sweettea-kernel@dorminy.me, christophe.leroy@csgroup.eu
Subject: [PATCH v14 08/11] powerpc: mm: Add pud_pfn() stub
Date: Fri, 11 Apr 2025 15:43:51 +1000	[thread overview]
Message-ID: <20250411054354.511145-9-ajd@linux.ibm.com> (raw)
In-Reply-To: <20250411054354.511145-1-ajd@linux.ibm.com>

From: Rohan McLure <rmclure@linux.ibm.com>

The page table check feature requires that pud_pfn() be defined
on each consuming architecture. Since only 64-bit, Book3S platforms
allow for hugepages at this upper level, and since the calling code is
gated by a call to pud_user_accessible_page(), which will return zero,
include this stub as a BUILD_BUG().

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
---
 arch/powerpc/include/asm/pgtable.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 2f72ad885332..bb43e4f46367 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -215,6 +215,15 @@ static inline bool arch_supports_memmap_on_memory(unsigned long vmemmap_size)
 
 #endif /* CONFIG_PPC64 */
 
+#ifndef pud_pfn
+#define pud_pfn pud_pfn
+static inline int pud_pfn(pud_t pud)
+{
+	BUILD_BUG();
+	return 0;
+}
+#endif
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_POWERPC_PGTABLE_H */
-- 
2.49.0


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  parent reply	other threads:[~2025-04-11  6:26 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-11  5:43 [PATCH v14 00/11] Support page table check on PowerPC Andrew Donnellan
2025-04-11  5:43 ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 01/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud_set() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 02/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_set() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 03/11] mm/page_table_check: Provide addr parameter to page_table_check_pte_set() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 04/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pud_clear() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 05/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pmd_clear() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 06/11] mm/page_table_check: Reinstate address parameter in [__]page_table_check_pte_clear() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 07/11] mm: Provide address parameter to p{te,md,ud}_user_accessible_page() Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` Andrew Donnellan [this message]
2025-04-11  5:43   ` [PATCH v14 08/11] powerpc: mm: Add pud_pfn() stub Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 09/11] powerpc: mm: Implement *_user_accessible_page() for ptes Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 10/11] powerpc: mm: Use set_pte_at_unchecked() for internal usages Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  5:43 ` [PATCH v14 11/11] powerpc: mm: Support page table check Andrew Donnellan
2025-04-11  5:43   ` Andrew Donnellan
2025-04-11  9:10 ` [PATCH v14 00/11] Support page table check on PowerPC Ingo Molnar
2025-04-11  9:10   ` Ingo Molnar
2025-05-12  5:04 ` Andrew Donnellan
2025-05-12  5:04   ` Andrew Donnellan
2025-06-10  7:33 ` Christophe Leroy
2025-06-10  7:33   ` Christophe Leroy
2025-06-11  3:16   ` Andrew Donnellan
2025-06-11  3:16     ` Andrew Donnellan
  -- strict thread matches above, loose matches on Subject: below --
2025-04-12  9:50 [PATCH v14 08/11] powerpc: mm: Add pud_pfn() stub kernel test robot

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