From patchwork Tue Oct 27 17:27:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexandru Elisei X-Patchwork-Id: 11861179 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=-12.8 required=3.0 tests=BAYES_00,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 B4DCFC4363A for ; Tue, 27 Oct 2020 17:30:49 +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 3469820657 for ; Tue, 27 Oct 2020 17:30:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="23utjFrG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3469820657 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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=6E/nA5dqF/5uI14wCX8fQXthmd8Ci+TTYN5QLod+Uks=; b=23utjFrGHARlzZ5huqacgRCRX 3hZ6iJJXNQVPOu2VPBR0ZYm8Ofj9q7L+WilnuX+zRGL3wTkGFxF+25R6oab67icU9irMGQ27i3j7l pxYu9EVzR9Cid3DIVtQ6ep05mTz/0YfXaT7UPdmf7OarOHZwMvARoRt5RLc0CT94PYYcqfVyy18Og 9+TVW/8hff4U788OmERXLghPMUEjKPT8hv3WH6jzYhGp/lCTzrnMhWjzMTVKcNje7238Czp/LZ/Xx EuB+0df27Ev/piQUbnu3p8sWHHCT3yv5fhRxjCfKKfWQaT6cqoWB2ezSLlySFMRFGiYHbYhClYjgt WMpkwUaMQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kXSnR-0006Rz-0o; Tue, 27 Oct 2020 17:30:09 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kXSjz-0004oT-LP for linux-arm-kernel@lists.infradead.org; Tue, 27 Oct 2020 17:26:36 +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 87F3115AB; Tue, 27 Oct 2020 10:26:35 -0700 (PDT) Received: from monolith.localdoman (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 814EF3F719; Tue, 27 Oct 2020 10:26:34 -0700 (PDT) From: Alexandru Elisei To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu Subject: [RFC PATCH v3 16/16] Documentation: arm64: Document ARM Neoverse-N1 erratum #1688567 Date: Tue, 27 Oct 2020 17:27:05 +0000 Message-Id: <20201027172705.15181-17-alexandru.elisei@arm.com> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027172705.15181-1-alexandru.elisei@arm.com> References: <20201027172705.15181-1-alexandru.elisei@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201027_132635_805601_578B6668 X-CRM114-Status: GOOD ( 12.23 ) 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: maz@kernel.org, will@kernel.org, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org According to erratum #1688567, a SPE buffer write that results in an Access flag fault or Permission fault at stage 2 is reported with an unsupported PMBSR_EL1.FSC code. KVM avoids SPE stage 2 faults altogether by requiring userspace to lock the guest memory in RAM and pre-mapping it in stage 2 before the VM is started. As a result, KVM is not impacted by this erratum. Signed-off-by: Alexandru Elisei --- Documentation/arm64/silicon-errata.rst | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index d3587805de64..1f6c403fd555 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -96,6 +96,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | ARM | Neoverse-N1 | #1542419 | ARM64_ERRATUM_1542419 | +----------------+-----------------+-----------------+-----------------------------+ +| ARM | Neoverse-N1 | #1688567 | N/A | ++----------------+-----------------+-----------------+-----------------------------+ | ARM | MMU-500 | #841119,826419 | N/A | +----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+