From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20568C4363D for ; Fri, 25 Sep 2020 11:14:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CBA42221E5 for ; Fri, 25 Sep 2020 11:14:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727970AbgIYLOm (ORCPT ); Fri, 25 Sep 2020 07:14:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:35614 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727201AbgIYLOm (ORCPT ); Fri, 25 Sep 2020 07:14:42 -0400 Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8777E208B6; Fri, 25 Sep 2020 11:14:39 +0000 (UTC) Date: Fri, 25 Sep 2020 12:14:37 +0100 From: Catalin Marinas To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 27/39] arm64: kasan: Enable in-kernel MTE Message-ID: <20200925111435.GE4846@gaia> References: <20326c060cd1535b15a0df43d1b9627a329f2277.1600987622.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20326c060cd1535b15a0df43d1b9627a329f2277.1600987622.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 25, 2020 at 12:50:34AM +0200, Andrey Konovalov wrote: > diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S > index 23c326a06b2d..12ba98bc3b3f 100644 > --- a/arch/arm64/mm/proc.S > +++ b/arch/arm64/mm/proc.S > @@ -427,6 +427,10 @@ SYM_FUNC_START(__cpu_setup) > */ > mov_q x5, MAIR_EL1_SET > #ifdef CONFIG_ARM64_MTE > + mte_tcr .req x20 > + > + mov mte_tcr, #0 > + > /* > * Update MAIR_EL1, GCR_EL1 and TFSR*_EL1 if MTE is supported > * (ID_AA64PFR1_EL1[11:8] > 1). > @@ -447,6 +451,9 @@ SYM_FUNC_START(__cpu_setup) > /* clear any pending tag check faults in TFSR*_EL1 */ > msr_s SYS_TFSR_EL1, xzr > msr_s SYS_TFSRE0_EL1, xzr > + > + /* set the TCR_EL1 bits */ > + orr mte_tcr, mte_tcr, #SYS_TCR_EL1_TCMA1 > 1: > #endif > msr mair_el1, x5 > @@ -457,6 +464,10 @@ SYM_FUNC_START(__cpu_setup) > mov_q x10, TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \ > TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \ > TCR_TBI0 | TCR_A1 | TCR_KASAN_FLAGS > +#ifdef CONFIG_ARM64_MTE > + orr x10, x10, mte_tcr > + .unreq mte_tcr > +#endif > tcr_clear_errata_bits x10, x9, x5 I had a slightly different preference (see the previous version) to avoid the #ifdef altogether but this works as well. Reviewed-by: Catalin Marinas From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51D9EC4363D for ; Fri, 25 Sep 2020 11:16:39 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E8CDB20936 for ; Fri, 25 Sep 2020 11:16:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="bU8kW+07" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E8CDB20936 Authentication-Results: mail.kernel.org; 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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLlgb-0002El-9n; Fri, 25 Sep 2020 11:14:45 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLlgY-0002E7-Ue for linux-arm-kernel@lists.infradead.org; Fri, 25 Sep 2020 11:14:43 +0000 Received: from gaia (unknown [31.124.44.166]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8777E208B6; Fri, 25 Sep 2020 11:14:39 +0000 (UTC) Date: Fri, 25 Sep 2020 12:14:37 +0100 From: Catalin Marinas To: Andrey Konovalov Subject: Re: [PATCH v3 27/39] arm64: kasan: Enable in-kernel MTE Message-ID: <20200925111435.GE4846@gaia> References: <20326c060cd1535b15a0df43d1b9627a329f2277.1600987622.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20326c060cd1535b15a0df43d1b9627a329f2277.1600987622.git.andreyknvl@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200925_071443_048253_B150A580 X-CRM114-Status: GOOD ( 16.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Marco Elver , Elena Petrova , Kevin Brodsky , Will Deacon , Branislav Rankov , kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Alexander Potapenko , Evgenii Stepanov , Andrey Ryabinin , Andrew Morton , Vincenzo Frascino , Dmitry Vyukov Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Sep 25, 2020 at 12:50:34AM +0200, Andrey Konovalov wrote: > diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S > index 23c326a06b2d..12ba98bc3b3f 100644 > --- a/arch/arm64/mm/proc.S > +++ b/arch/arm64/mm/proc.S > @@ -427,6 +427,10 @@ SYM_FUNC_START(__cpu_setup) > */ > mov_q x5, MAIR_EL1_SET > #ifdef CONFIG_ARM64_MTE > + mte_tcr .req x20 > + > + mov mte_tcr, #0 > + > /* > * Update MAIR_EL1, GCR_EL1 and TFSR*_EL1 if MTE is supported > * (ID_AA64PFR1_EL1[11:8] > 1). > @@ -447,6 +451,9 @@ SYM_FUNC_START(__cpu_setup) > /* clear any pending tag check faults in TFSR*_EL1 */ > msr_s SYS_TFSR_EL1, xzr > msr_s SYS_TFSRE0_EL1, xzr > + > + /* set the TCR_EL1 bits */ > + orr mte_tcr, mte_tcr, #SYS_TCR_EL1_TCMA1 > 1: > #endif > msr mair_el1, x5 > @@ -457,6 +464,10 @@ SYM_FUNC_START(__cpu_setup) > mov_q x10, TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \ > TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \ > TCR_TBI0 | TCR_A1 | TCR_KASAN_FLAGS > +#ifdef CONFIG_ARM64_MTE > + orr x10, x10, mte_tcr > + .unreq mte_tcr > +#endif > tcr_clear_errata_bits x10, x9, x5 I had a slightly different preference (see the previous version) to avoid the #ifdef altogether but this works as well. Reviewed-by: Catalin Marinas _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel