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Tue, 09 Mar 2021 05:24:42 -0800 (PST) Date: Tue, 9 Mar 2021 14:24:34 +0100 Message-Id: Mime-Version: 1.0 X-Mailer: git-send-email 2.30.1.766.gb4fecdf3b7-goog Subject: [PATCH v3 0/5] kasan: integrate with init_on_alloc/free From: Andrey Konovalov To: Andrew Morton , Christoph Lameter , Pekka Enberg , David Rientjes , Joonsoo Kim , Vlastimil Babka , Catalin Marinas Cc: Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Peter Collingbourne , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Stat-Signature: 68wyj1h1dtrrtb343j5siau4zawhydqz X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 38FDFF0 Received-SPF: none (flex--andreyknvl.bounces.google.com>: No applicable sender policy available) receiver=imf20; identity=mailfrom; envelope-from="<3GndHYAoKCC8LYOcPjVYgWRZZRWP.NZXWTYfi-XXVgLNV.ZcR@flex--andreyknvl.bounces.google.com>"; helo=mail-qt1-f202.google.com; client-ip=209.85.160.202 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1615296280-236480 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch series integrates HW_TAGS KASAN with init_on_alloc/free by initializing memory via the same arm64 instruction that sets memory tags. This is expected to improve HW_TAGS KASAN performance when init_on_alloc/free is enabled. The exact perfomance numbers are unknown as MTE-enabled hardware doesn't exist yet. Changes v2->v3: - Move init variable check out of initialization loop in mte_set_mem_tag_range(). Changes v1->v2: - Add and use kasan_has_integrated_init() helper. - Update comments to not explicitly mention relation between HW_TAGS KASAN and memory init. - Fix non initting memory with kasan=off by checking kasan_enabled() instead of IS_ENABLED(CONFIG_KASAN_HW_TAGS). Andrey Konovalov (5): arm64: kasan: allow to init memory when setting tags kasan: init memory in kasan_(un)poison for HW_TAGS kasan, mm: integrate page_alloc init with HW_TAGS kasan, mm: integrate slab init_on_alloc with HW_TAGS kasan, mm: integrate slab init_on_free with HW_TAGS arch/arm64/include/asm/memory.h | 4 +- arch/arm64/include/asm/mte-kasan.h | 39 +++++++++++------ include/linux/kasan.h | 48 +++++++++++++------- lib/test_kasan.c | 4 +- mm/kasan/common.c | 45 +++++++++---------- mm/kasan/generic.c | 12 ++--- mm/kasan/kasan.h | 19 ++++---- mm/kasan/shadow.c | 10 ++--- mm/kasan/sw_tags.c | 2 +- mm/mempool.c | 4 +- mm/page_alloc.c | 37 +++++++++++----- mm/slab.c | 43 ++++++++++-------- mm/slab.h | 17 ++++++-- mm/slub.c | 70 +++++++++++++++--------------- 14 files changed, 207 insertions(+), 147 deletions(-) -- 2.30.1.766.gb4fecdf3b7-goog