From nobody Sun Dec 14 21:44:35 2025 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 15E192163AA; Tue, 4 Feb 2025 17:37:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.20 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738690627; cv=none; b=suFrfrutL4nderrj8Jsb9vLA8qhUQqFj6gqeuh9FjYps6QhsAvfKLSpzt6Dt2DCqG5AvdwZcq1upS8akU1v2K4MwMLR2yO5Uy1TC/9iWxU7vJxi4rptqU53nbaBuPRDzP/748xDgYtNNXau97AnIi5lxYttF3sMcuLLp3rDJVwE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738690627; c=relaxed/simple; bh=r2iiDiPZOS4/QANoocz7hbq1LBuYUYYysQaiQVX4JUg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nOrfn2Jm7lz9UDUADxwD2UmINo9nSVeM7X2MKF/n0NT/ngwq6Ibb5w3qPCHtCcQBW4FvbvjkzzTD2lF7eaIYieJSsO8M+t8LV+YHcXPihlPKCX5X+w9XHKgpmxGgJbZRb/bqgQz0e2Ym3Fo4hz35dKaCKJhiT4WwOe72YCbYqy8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=A9DnbX4Z; arc=none smtp.client-ip=198.175.65.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="A9DnbX4Z" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1738690626; x=1770226626; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=r2iiDiPZOS4/QANoocz7hbq1LBuYUYYysQaiQVX4JUg=; b=A9DnbX4Z9IwBYz3VpbeJxIgfP3l52T38fvZC/JCnHlJRKN4J+P47wTOG nWu9Pqab15e01pHqHX/3KmwEr8/EL2suF4dYHr3ixz0lwEDlKIjqp/dMw CbltiCEzVwKYJBZ6zIJ17R1KyuOr8hqVbHtmwasZ39cn4Td5J1COGQNJz i7ejcJOxS+W2mK/nUh8UfWloYT1jPRr8Uzwv2A591dzilinxCy5sRU229 KJMEmWTTjR5RwrkKbxuFBXBWMR2WzcOWUzA4EvtMHQfDbSz+gsdPP/Xmz QaDvMHhwyMGyerdQHPZp3EYAdkfG1uMweLAumqZYKKQ79/F1kElLn+Qz6 A==; X-CSE-ConnectionGUID: Jlv3wYWESBmqrrSs8UzHKw== X-CSE-MsgGUID: gq2SdZbzRdu//H0avhk1Cw== X-IronPort-AV: E=McAfee;i="6700,10204,11336"; a="38931048" X-IronPort-AV: E=Sophos;i="6.13,259,1732608000"; d="scan'208";a="38931048" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2025 09:37:04 -0800 X-CSE-ConnectionGUID: F7WrZE34TJC30qp8xAUvrQ== X-CSE-MsgGUID: 1Ko21FfoQgSOsBU65eanYQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="147866985" Received: from mjarzebo-mobl1.ger.corp.intel.com (HELO wieczorr-mobl1.intel.com) ([10.245.244.61]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Feb 2025 09:36:51 -0800 From: Maciej Wieczor-Retman To: luto@kernel.org, xin@zytor.com, kirill.shutemov@linux.intel.com, palmer@dabbelt.com, tj@kernel.org, andreyknvl@gmail.com, brgerst@gmail.com, ardb@kernel.org, dave.hansen@linux.intel.com, jgross@suse.com, will@kernel.org, akpm@linux-foundation.org, arnd@arndb.de, corbet@lwn.net, maciej.wieczor-retman@intel.com, dvyukov@google.com, richard.weiyang@gmail.com, ytcoode@gmail.com, tglx@linutronix.de, hpa@zytor.com, seanjc@google.com, paul.walmsley@sifive.com, aou@eecs.berkeley.edu, justinstitt@google.com, jason.andryuk@amd.com, glider@google.com, ubizjak@gmail.com, jannh@google.com, bhe@redhat.com, vincenzo.frascino@arm.com, rafael.j.wysocki@intel.com, ndesaulniers@google.com, mingo@redhat.com, catalin.marinas@arm.com, junichi.nomura@nec.com, nathan@kernel.org, ryabinin.a.a@gmail.com, dennis@kernel.org, bp@alien8.de, kevinloughlin@google.com, morbo@google.com, dan.j.williams@intel.com, julian.stecklina@cyberus-technology.de, peterz@infradead.org, cl@linux.com, kees@kernel.org Cc: kasan-dev@googlegroups.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, linux-doc@vger.kernel.org Subject: [PATCH 12/15] x86: Minimal SLAB alignment Date: Tue, 4 Feb 2025 18:33:53 +0100 Message-ID: <162610a0af3e04e2f42872401461b1d62ec78fbd.1738686764.git.maciej.wieczor-retman@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Adjust x86 minimal SLAB alignment to match KASAN granularity size. In tag-based mode the size changes to 16 bytes so the value needs to be 4. Signed-off-by: Maciej Wieczor-Retman --- arch/x86/include/asm/kasan.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/include/asm/kasan.h b/arch/x86/include/asm/kasan.h index 8829337a75fa..f7a8d3763615 100644 --- a/arch/x86/include/asm/kasan.h +++ b/arch/x86/include/asm/kasan.h @@ -36,6 +36,8 @@ =20 #ifdef CONFIG_KASAN_SW_TAGS =20 +#define ARCH_SLAB_MINALIGN (1ULL << KASAN_GRANULE_SHIFT) + #define __tag_shifted(tag) FIELD_PREP(GENMASK_ULL(60, 57), tag) #define __tag_reset(addr) (sign_extend64((u64)(addr), 56)) #define __tag_get(addr) ((u8)FIELD_GET(GENMASK_ULL(60, 57), (u64)addr)) --=20 2.47.1