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=-3.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no 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 B7631C43215 for ; Wed, 13 Nov 2019 17:23:05 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id D2380206E3 for ; Wed, 13 Nov 2019 17:23:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D2380206E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id B98314B140; Wed, 13 Nov 2019 12:23:04 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kW-U8vItCQou; Wed, 13 Nov 2019 12:23:03 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 9F8E64B10C; Wed, 13 Nov 2019 12:23:03 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 243DB4B0E9 for ; Wed, 13 Nov 2019 12:23:03 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3g8CuJJcAfmP for ; Wed, 13 Nov 2019 12:23:02 -0500 (EST) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 128464B0E8 for ; Wed, 13 Nov 2019 12:23:02 -0500 (EST) 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 A2B2830E; Wed, 13 Nov 2019 09:23:01 -0800 (PST) Received: from e112269-lin.cambridge.arm.com (e112269-lin.cambridge.arm.com [10.1.194.43]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4BACF3F534; Wed, 13 Nov 2019 09:23:00 -0800 (PST) From: Steven Price To: Catalin Marinas , Marc Zyngier , Will Deacon Subject: [PATCH v3 0/3] arm64: Workaround for Cortex-A55 erratum 1530923 Date: Wed, 13 Nov 2019 17:22:49 +0000 Message-Id: <20191113172252.12610-1-steven.price@arm.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Cc: linux-kernel@vger.kernel.org, Steven Price , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Version 3 and I'm up to 3 patches - let's hope it doesn't continue to grow... ;) This series enables a workaround for Cortex-A55 erratum 1530923. The erratum potentially allows TLB entries to be allocated as a result of a speculative AT instruction. This may happen in the middle of a guest world switch while the relevant VMSA configuration is in an inconsistent state, leading to erroneous content being allocated into TLBs. There are existing workarounds for similar issues, 1165522 is effectively the same, and 1319367/1319537 is similar but without VHE support. Rather than add to the selection of errata, the first patch renames 1165522 to WORKAROUND_SPECULATIVE_AT which can be reused (in the final patch) for 1530923. The workaround for errata 1319367 and 1319537 although similar cannot use VHE (not available on those CPUs) so cannot share the workaround. However, to keep some sense of symmetry the workaround is renamed to SPECULATIVE_AT_NVHE. Changes since v2: * Split 1319367/1319537 back into their own workaround, but rename it for symmetry with the VHE workaround. Changes since v1: * Combine 1319367/1319537 into the same 'SPECULATIVE_AT' workaround. Steven Price (3): arm64: Rename WORKAROUND_1165522 to SPECULATIVE_AT_VHE arm64: Rename WORKAROUND_1319367 to SPECULATIVE_AT_NVHE arm64: Workaround for Cortex-A55 erratum 1530923 Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 21 +++++++++++++++++++++ arch/arm64/include/asm/cpucaps.h | 4 ++-- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/include/asm/kvm_hyp.h | 6 +++--- arch/arm64/kernel/cpu_errata.c | 25 +++++++++++++++++++------ arch/arm64/kvm/hyp/switch.c | 10 +++++----- arch/arm64/kvm/hyp/sysreg-sr.c | 4 ++-- arch/arm64/kvm/hyp/tlb.c | 12 ++++++------ 9 files changed, 61 insertions(+), 25 deletions(-) -- 2.20.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm