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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 E8A04CA9EAF for ; Sun, 27 Oct 2019 21:31:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB4BE20717 for ; Sun, 27 Oct 2019 21:31:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572211917; bh=8IOV29BNjDY+REp3WUyqDVAt2o6u+fOSAlETP48YXZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Y1fwjMKmqc8l1+jFzT/2s9ElKukFCcfE+NpC9dy1u9yN4YqcxQpma15SFejxOzuyO QhxP4OfVeaQWGNPhlcQhV+gx0WlYZ3KnED/YmUSkQlDhW4QcJ9ExBLJ9yvJCg8L9pu 7MO4usJH+70DSILC1ayMbs66jAaMIyqYRfrDYFNY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730737AbfJ0VP6 (ORCPT ); Sun, 27 Oct 2019 17:15:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:35368 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730718AbfJ0VP4 (ORCPT ); Sun, 27 Oct 2019 17:15:56 -0400 Received: from localhost (100.50.158.77.rev.sfr.net [77.158.50.100]) (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 B1E94205C9; Sun, 27 Oct 2019 21:15:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1572210955; bh=8IOV29BNjDY+REp3WUyqDVAt2o6u+fOSAlETP48YXZE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hr0pqfHjpSBNS8p9sB0LYq1W1T43P2Xqbm1Wx1BbsxJuVy33RlO5SKyQyCinBOKLO c1k/Is5GTFeKlYmnVi3MDP7qG2EwiF6ZyIYYBgBaeRVyqH/TWTUnEmZjX5Kq+Awhup oYi8YPitjvuALjLIF9+7cvCA9huC7xv4ZX8FDAQg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Will Deacon Subject: [PATCH 4.19 73/93] arm64: Enable workaround for Cavium TX2 erratum 219 when running SMT Date: Sun, 27 Oct 2019 22:01:25 +0100 Message-Id: <20191027203310.113079555@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191027203251.029297948@linuxfoundation.org> References: <20191027203251.029297948@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Marc Zyngier commit 93916beb70143c46bf1d2bacf814be3a124b253b upstream. It appears that the only case where we need to apply the TX2_219_TVM mitigation is when the core is in SMT mode. So let's condition the enabling on detecting a CPU whose MPIDR_EL1.Aff0 is non-zero. Cc: Signed-off-by: Marc Zyngier Signed-off-by: Will Deacon Signed-off-by: Greg Kroah-Hartman --- arch/arm64/kernel/cpu_errata.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -23,6 +23,7 @@ #include #include #include +#include static bool __maybe_unused is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope) @@ -618,6 +619,30 @@ check_branch_predictor(const struct arm6 return (need_wa > 0); } +static const __maybe_unused struct midr_range tx2_family_cpus[] = { + MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN), + MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2), + {}, +}; + +static bool __maybe_unused +needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry, + int scope) +{ + int i; + + if (!is_affected_midr_range_list(entry, scope) || + !is_hyp_mode_available()) + return false; + + for_each_possible_cpu(i) { + if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0) + return true; + } + + return false; +} + #ifdef CONFIG_HARDEN_EL2_VECTORS static const struct midr_range arm64_harden_el2_vectors[] = { @@ -802,6 +827,14 @@ const struct arm64_cpu_capabilities arm6 .matches = has_cortex_a76_erratum_1463225, }, #endif +#ifdef CONFIG_CAVIUM_TX2_ERRATUM_219 + { + .desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)", + .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM, + ERRATA_MIDR_RANGE_LIST(tx2_family_cpus), + .matches = needs_tx2_tvm_workaround, + }, +#endif { } };