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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 34792C54FC9 for ; Tue, 21 Apr 2020 14:32:13 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 C39F6206B8 for ; Tue, 21 Apr 2020 14:32:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="GHGm4nSm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C39F6206B8 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ZizqJjPvGWq/3bcTpanQrvy9mQmuszUR+BiM0A7Kh0s=; b=GHGm4nSmXddNKQ qZsPhoxnzPycak3JrE8O91E8dvcT37DzSAWR0b3WyoQ43DaZipW/xq/y7uBDSN7nk+76/ZnbMh5CI Tx08TzHSQGXogPHtQ9IehoVNmtnrM2XGFdAGjVzblym7zfaueOVqfcpeYq65YeQhhmtrbE7KOVNB/ lgcNl44pGoXdUDlDbKFEe62s1Bb5e1VfkhuL06NVYxc2vFaWU1RwRVlbNHp5ik5yb4H+1Ao1zHRHk njapoZtxsWwmqA6vxbDxnxfi7yJRs9DNNlRCcVb3FbitVMiM9qNuk//A2fPIpQ/uEzfYOxY1aEcOx ToYhdpbAtBPl8HFUJorw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jQtwU-000727-Cl; Tue, 21 Apr 2020 14:32:06 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jQtrJ-0008Vn-Ji for linux-arm-kernel@lists.infradead.org; Tue, 21 Apr 2020 14:26:50 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id A1C15C14; Tue, 21 Apr 2020 07:26:44 -0700 (PDT) Received: from localhost.localdomain (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EFEF93F68F; Tue, 21 Apr 2020 07:26:42 -0700 (PDT) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 18/23] arm64: mte: Restore the GCR_EL1 register after a suspend Date: Tue, 21 Apr 2020 15:25:58 +0100 Message-Id: <20200421142603.3894-19-catalin.marinas@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200421142603.3894-1-catalin.marinas@arm.com> References: <20200421142603.3894-1-catalin.marinas@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200421_072645_744873_FA501421 X-CRM114-Status: GOOD ( 10.50 ) 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-arch@vger.kernel.org, Richard Earnshaw , Lorenzo Pieralisi , Szabolcs Nagy , Andrey Konovalov , Kevin Brodsky , Peter Collingbourne , linux-mm@kvack.org, Vincenzo Frascino , Will Deacon Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org The CPU resume/suspend routines only take care of the common system registers. Restore GCR_EL1 in addition via the __cpu_suspend_exit() function. Signed-off-by: Catalin Marinas Cc: Will Deacon Cc: Lorenzo Pieralisi --- Notes: New in v3. arch/arm64/include/asm/mte.h | 4 ++++ arch/arm64/kernel/mte.c | 8 ++++++++ arch/arm64/kernel/suspend.c | 4 ++++ 3 files changed, 16 insertions(+) diff --git a/arch/arm64/include/asm/mte.h b/arch/arm64/include/asm/mte.h index 3dc0a7977124..22eb3e06f311 100644 --- a/arch/arm64/include/asm/mte.h +++ b/arch/arm64/include/asm/mte.h @@ -12,6 +12,7 @@ int mte_memcmp_pages(const void *page1_addr, const void *page2_addr); #ifdef CONFIG_ARM64_MTE void flush_mte_state(void); void mte_thread_switch(struct task_struct *next); +void mte_suspend_exit(void); long set_mte_ctrl(unsigned long arg); long get_mte_ctrl(void); #else @@ -21,6 +22,9 @@ static inline void flush_mte_state(void) static inline void mte_thread_switch(struct task_struct *next) { } +static inline void mte_suspend_exit(void) +{ +} static inline long set_mte_ctrl(unsigned long arg) { return 0; diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 212b9fac294d..fa4a4196b248 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -76,6 +76,14 @@ void mte_thread_switch(struct task_struct *next) update_gcr_el1_excl(next->thread.gcr_incl); } +void mte_suspend_exit(void) +{ + if (!system_supports_mte()) + return; + + update_gcr_el1_excl(current->thread.gcr_incl); +} + long set_mte_ctrl(unsigned long arg) { u64 tcf0; diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c index 9405d1b7f4b0..1d405b73d009 100644 --- a/arch/arm64/kernel/suspend.c +++ b/arch/arm64/kernel/suspend.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -74,6 +75,9 @@ void notrace __cpu_suspend_exit(void) */ if (arm64_get_ssbd_state() == ARM64_SSBD_FORCE_DISABLE) arm64_set_ssbd_mitigation(false); + + /* Restore additional MTE-specific configuration */ + mte_suspend_exit(); } /* _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel