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Mon, 28 Sep 2026 03:44:51 -0700 (PDT) Received: from pve-server.rlab ([49.205.216.49]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0976c8f8dsm27071975a91.12.2026.09.28.03.44.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Sep 2026 03:44:50 -0700 (PDT) From: "Ritesh Harjani (IBM)" To: linuxppc-dev@lists.ozlabs.org Cc: Madhavan Srinivasan , Michael Ellerman , Christophe Leroy , Venkat Rao Bagalkote , Shrikanth Hegde , Marco Elver , linux-kernel@vger.kernel.org, "Ritesh Harjani (IBM)" Subject: [RFC 0/6] powerpc/mm: Enable clang context analysis Date: Mon, 28 Sep 2026 16:14:30 +0530 Message-Id: X-Mailer: git-send-email 2.39.5 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Lock acquire and release checking used to be done with Sparse. That support was removed [1] and replaced with Clang context analysis [2]. Note that enabling this caught a real locking rcu bug in arch/powerpc/mm (Patch-1). Note, more invasive checkers to check what each lock protects is deferred for later enablement. This is based on top of previous powerpc/powernv,pseries Clang context analysis enablement series [3]. The series was build tested with LLVM/Clang 23.x [1] 5b63d0ae94cc ("compiler-context-analysis: Remove Sparse support") [2] 3269701cb256 ("compiler-context-analysis: Add infrastructure for Context Analysis with Clang") [3]: https://lore.kernel.org/linuxppc-dev/cover.1790517984.git.ritesh.list@gmail.com/ Ritesh Harjani (IBM) (6): powerpc/mm/book3s64: unlock RCU before returning from mm_iommu_is_devmem() powerpc/mm/book3s64: Rework tlbie() to remove conditional locking powerpc/mm/book3s64: Rework native_flush_hash_range() to remove conditional locking powerpc/mm/book3s64: Annotate the subpage-protection PTE lock powerpc/mm: Rework nohash TLB broadcast locking powerpc/mm: Enable context analysis arch/powerpc/mm/Makefile | 2 + arch/powerpc/mm/book3s32/Makefile | 2 + arch/powerpc/mm/book3s64/Makefile | 2 + arch/powerpc/mm/book3s64/hash_native.c | 122 +++++++++++++++--------- arch/powerpc/mm/book3s64/iommu_api.c | 6 +- arch/powerpc/mm/book3s64/subpage_prot.c | 2 + arch/powerpc/mm/nohash/Makefile | 2 + arch/powerpc/mm/nohash/mmu_context.c | 1 + arch/powerpc/mm/nohash/tlb.c | 8 +- 9 files changed, 98 insertions(+), 49 deletions(-) -- 2.39.5