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=-8.1 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLACK,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 11025C43603 for ; Mon, 16 Dec 2019 04:29:10 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (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 BFEEE20684 for ; Mon, 16 Dec 2019 04:29:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BFEEE20684 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ozlabs.ru Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 47bpFH350tzDqSf for ; Mon, 16 Dec 2019 15:29:07 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.ru (client-ip=107.174.27.60; helo=ozlabs.ru; envelope-from=aik@ozlabs.ru; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ozlabs.ru Received: from ozlabs.ru (unknown [107.174.27.60]) by lists.ozlabs.org (Postfix) with ESMTP id 47bp2v1571zDqS8 for ; Mon, 16 Dec 2019 15:20:07 +1100 (AEDT) Received: from fstn1-p1.ozlabs.ibm.com (localhost [IPv6:::1]) by ozlabs.ru (Postfix) with ESMTP id A65E2AE80805; Sun, 15 Dec 2019 23:18:27 -0500 (EST) From: Alexey Kardashevskiy To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH kernel v2 4/4] powerpc/pseries/svm: Allow IOMMU to work in SVM Date: Mon, 16 Dec 2019 15:19:24 +1100 Message-Id: <20191216041924.42318-5-aik@ozlabs.ru> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191216041924.42318-1-aik@ozlabs.ru> References: <20191216041924.42318-1-aik@ozlabs.ru> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Alexey Kardashevskiy , Michael Anderson , Ram Pai , kvm-ppc@vger.kernel.org, Thiago Jung Bauermann , David Gibson Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" H_PUT_TCE_INDIRECT uses a shared page to send up to 512 TCE to a hypervisor in a single hypercall. This does not work for secure VMs as the page needs to be shared or the VM should use H_PUT_TCE instead. This disables H_PUT_TCE_INDIRECT by clearing the FW_FEATURE_PUT_TCE_IND feature bit so SVMs will map TCEs using H_PUT_TCE. This is not a part of init_svm() as it is called too late after FW patching is done and may result in a warning like this: [ 3.727716] Firmware features changed after feature patching! [ 3.727965] WARNING: CPU: 0 PID: 1 at (...)arch/powerpc/lib/feature-fixups.c:466 check_features+0xa4/0xc0 Signed-off-by: Alexey Kardashevskiy --- Changes: v2 * new in the patchset --- arch/powerpc/platforms/pseries/firmware.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/powerpc/platforms/pseries/firmware.c b/arch/powerpc/platforms/pseries/firmware.c index d3acff23f2e3..3e49cc23a97a 100644 --- a/arch/powerpc/platforms/pseries/firmware.c +++ b/arch/powerpc/platforms/pseries/firmware.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "pseries.h" @@ -101,6 +102,12 @@ static void __init fw_hypertas_feature_init(const char *hypertas, } } + if (is_secure_guest() && + (powerpc_firmware_features & FW_FEATURE_PUT_TCE_IND)) { + powerpc_firmware_features &= ~FW_FEATURE_PUT_TCE_IND; + pr_debug("SVM: disabling PUT_TCE_IND firmware feature\n"); + } + pr_debug(" <- fw_hypertas_feature_init()\n"); } -- 2.17.1