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Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org, kasan-dev@googlegroups.com, linux-mm@kvack.org, Muhammad Usama Anjum X-Mailer: b4 0.16.0 X-Rspam-User: X-Rspamd-Queue-Id: DCC041A0003 X-Stat-Signature: zi9qm39zoyh5k98m33jzubt6fu9woj9t X-Rspamd-Server: rspam01 X-HE-Tag: 1789393936-688493 X-HE-Meta: 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 RoYdljRw eg2ycvWBv23tgMZUQy/9SbsLBrWMo2EdsCop7HsMkytFAneAY6jtXSIrf5NhFey8RqO8khA5Q0a1ZHzx7kVGyx0prV/izuMk5dVO8kGiImAvrS2qNnr8Fp9rDGTKmRSYt3dJzKD+pGUf6cTGmjTQFuFlDQOL5D/E7cz9pcCq/Q1j2UJpIlY59dKApQ6hyUyMV/ycMyP4WJ6+Qd+3WnzD0JcwoVXzzxJjTfbBepPC6+G8PlOXLAbkNFl6TmkCLo3GgD+iwLOQltDy8DwLQ6Kq1yVHBFptw2kYte0tdxHximOw1DpHwcuWFd/R/10JAgc8fMyL4rEJ+ghjw4K8= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: __ptep_get() returns a SW PTE value, and __set_pte_nosync() accepts one. When HW PTEs use a distinct hw_pte_t, directly reading or writing *ptep as a SW PTE value no longer satisfies those interfaces. Use __pte_from_hw after READ_ONCE() to obtain a SW PTE value and add __hw_pte before WRITE_ONCE() to form an HW PTE. Define __hw_pte for both the wrapper and alias configurations so the same accessor code works in either case. Signed-off-by: Muhammad Usama Anjum --- arch/arm64/include/asm/pgtable.h | 4 ++-- include/linux/pgtable_types.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 4768ec59de555..67c4a6179e154 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -360,7 +360,7 @@ static inline pte_t pte_clear_uffd(pte_t pte) static inline void __set_pte_nosync(hw_pte_t *ptep, pte_t pte) { - WRITE_ONCE(*ptep, pte); + WRITE_ONCE(*ptep, __hw_pte(pte)); } static inline void __set_pte_complete(pte_t pte) @@ -381,7 +381,7 @@ static inline void __set_pte(hw_pte_t *ptep, pte_t pte) static inline pte_t __ptep_get(hw_pte_t *ptep) { - return READ_ONCE(*ptep); + return __pte_from_hw(READ_ONCE(*ptep)); } extern void __sync_icache_dcache(pte_t pteval); diff --git a/include/linux/pgtable_types.h b/include/linux/pgtable_types.h index ee4eace5c3e1c..b5862a16aa497 100644 --- a/include/linux/pgtable_types.h +++ b/include/linux/pgtable_types.h @@ -9,11 +9,13 @@ #ifdef CONFIG_ARCH_HAS_HW_PTE_T typedef struct __hw_pte_t { pte_t __pte; } hw_pte_t; #define __pte_from_hw(pte) ((pte).__pte) +#define __hw_pte(pte) ((hw_pte_t) { (pte) }) #define hw_pte_val(x) pte_val((x).__pte) #else #define hw_pte_t pte_t #define __pte_from_hw(pte) (pte) +#define __hw_pte(pte) (pte) #define hw_pte_val(x) pte_val(x) #endif -- 2.47.3