From: Samuel Holland <samuel.holland@sifive.com>
To: Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <pjw@kernel.org>,
linux-riscv@lists.infradead.org
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Conor Dooley <conor@kernel.org>,
Alexandre Ghiti <alex@ghiti.fr>,
Emil Renner Berthing <kernel@esmil.dk>,
Andrew Morton <akpm@linux-foundation.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Samuel Holland <samuel.holland@sifive.com>
Subject: [PATCH v2 03/18] mm: Move the fallback definitions of pXXp_get()
Date: Wed, 8 Oct 2025 18:57:39 -0700 [thread overview]
Message-ID: <20251009015839.3460231-4-samuel.holland@sifive.com> (raw)
In-Reply-To: <20251009015839.3460231-1-samuel.holland@sifive.com>
Some platforms need to fix up the values when reading or writing page
tables. Because of this, the accessors must always be used; it is not
valid to simply dereference a pXX_t pointer.
Move these definitions up by a few lines, so they will be in scope
everywhere that currently dereferences a pXX_t pointer.
Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---
Changes in v2:
- New patch for v2
include/linux/pgtable.h | 70 ++++++++++++++++++++---------------------
1 file changed, 35 insertions(+), 35 deletions(-)
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index 25a7257052ff9..50286763b652f 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -90,6 +90,41 @@ static inline unsigned long pud_index(unsigned long address)
#define pgd_index(a) (((a) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
#endif
+#ifndef ptep_get
+static inline pte_t ptep_get(pte_t *ptep)
+{
+ return READ_ONCE(*ptep);
+}
+#endif
+
+#ifndef pmdp_get
+static inline pmd_t pmdp_get(pmd_t *pmdp)
+{
+ return READ_ONCE(*pmdp);
+}
+#endif
+
+#ifndef pudp_get
+static inline pud_t pudp_get(pud_t *pudp)
+{
+ return READ_ONCE(*pudp);
+}
+#endif
+
+#ifndef p4dp_get
+static inline p4d_t p4dp_get(p4d_t *p4dp)
+{
+ return READ_ONCE(*p4dp);
+}
+#endif
+
+#ifndef pgdp_get
+static inline pgd_t pgdp_get(pgd_t *pgdp)
+{
+ return READ_ONCE(*pgdp);
+}
+#endif
+
#ifndef kernel_pte_init
static inline void kernel_pte_init(void *addr)
{
@@ -334,41 +369,6 @@ static inline int pudp_set_access_flags(struct vm_area_struct *vma,
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif
-#ifndef ptep_get
-static inline pte_t ptep_get(pte_t *ptep)
-{
- return READ_ONCE(*ptep);
-}
-#endif
-
-#ifndef pmdp_get
-static inline pmd_t pmdp_get(pmd_t *pmdp)
-{
- return READ_ONCE(*pmdp);
-}
-#endif
-
-#ifndef pudp_get
-static inline pud_t pudp_get(pud_t *pudp)
-{
- return READ_ONCE(*pudp);
-}
-#endif
-
-#ifndef p4dp_get
-static inline p4d_t p4dp_get(p4d_t *p4dp)
-{
- return READ_ONCE(*p4dp);
-}
-#endif
-
-#ifndef pgdp_get
-static inline pgd_t pgdp_get(pgd_t *pgdp)
-{
- return READ_ONCE(*pgdp);
-}
-#endif
-
#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma,
unsigned long address,
--
2.47.2
next prev parent reply other threads:[~2025-10-09 1:58 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-09 1:57 [PATCH v2 00/18] riscv: Memory type control for platforms with physical memory aliases Samuel Holland
2025-10-09 1:57 ` [PATCH v2 01/18] mm/ptdump: Replace READ_ONCE() with standard page table accessors Samuel Holland
2025-10-09 9:34 ` David Hildenbrand
2025-10-09 1:57 ` [PATCH v2 02/18] perf/core: " Samuel Holland
2025-10-09 2:03 ` Anshuman Khandual
2025-10-09 1:57 ` Samuel Holland [this message]
2025-10-09 1:57 ` [PATCH v2 04/18] mm: Always use page table accessor functions Samuel Holland
2025-10-09 2:10 ` Anshuman Khandual
2025-10-09 1:57 ` [PATCH v2 05/18] mm: Allow page table accessors to be non-idempotent Samuel Holland
2025-10-09 1:57 ` [PATCH v2 06/18] riscv: hibernate: Replace open-coded pXXp_get() Samuel Holland
2025-10-09 1:57 ` [PATCH v2 07/18] riscv: mm: Always use page table accessor functions Samuel Holland
2025-10-09 1:57 ` [PATCH v2 08/18] riscv: mm: Simplify set_p4d() and set_pgd() Samuel Holland
2025-10-09 1:57 ` [PATCH v2 09/18] riscv: mm: Deduplicate _PAGE_CHG_MASK definition Samuel Holland
2025-10-09 1:57 ` [PATCH v2 10/18] riscv: ptdump: Only show N and MT bits when enabled in the kernel Samuel Holland
2025-10-09 1:57 ` [PATCH v2 11/18] riscv: mm: Fix up memory types when writing page tables Samuel Holland
2025-10-09 1:57 ` [PATCH v2 12/18] riscv: mm: Expose all page table bits to assembly code Samuel Holland
2025-10-09 1:57 ` [PATCH v2 13/18] riscv: alternative: Add an ALTERNATIVE_3 macro Samuel Holland
2025-10-09 1:57 ` [PATCH v2 14/18] riscv: alternative: Allow calls with alternate link registers Samuel Holland
2025-10-09 1:57 ` [PATCH v2 15/18] dt-bindings: riscv: Describe physical memory regions Samuel Holland
2025-10-09 12:37 ` Rob Herring (Arm)
2025-10-09 1:57 ` [PATCH v2 16/18] riscv: mm: Use physical memory aliases to apply PMAs Samuel Holland
2025-10-10 15:06 ` Emil Renner Berthing
2025-10-10 16:12 ` Samuel Holland
2025-10-10 17:04 ` Emil Renner Berthing
2025-10-10 18:01 ` Samuel Holland
2025-10-10 19:55 ` Emil Renner Berthing
2025-10-09 1:57 ` [PATCH v2 17/18] riscv: dts: starfive: jh7100: Use physical memory ranges for DMA Samuel Holland
2025-10-10 14:19 ` Emil Renner Berthing
2025-10-10 16:51 ` Samuel Holland
2025-10-14 9:14 ` Conor Dooley
2025-10-09 1:57 ` [PATCH v2 18/18] riscv: dts: eswin: eic7700: " Samuel Holland
2025-10-10 1:15 ` [PATCH v2 00/18] riscv: Memory type control for platforms with physical memory aliases Andrew Morton
2025-10-10 17:17 ` Samuel Holland
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