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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id BFFCFC7EE24 for ; Mon, 5 Jun 2023 15:41:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=3QVmF214cqQhRHFAi32fiMM7+P/5BAtilenymE3M/40=; b=kmscRO7JFSZlwX gFCmoWHuDACjyz65ehsGDkjgXfCjE3NlsvhZxxek0Yrh9STPPvGyyDpCy5AyOAIjmrOMzebUw7dMf J3wMLSS03XfhhV+G9ooWiUhLFVD1IY15yvjdB/NaUXsQcZHmNQQ4FauUdjujOc+tg40V4bSRcNjyq MFE1LU4F0aq39/TFDa6pOUy5WOBTkFujAazN2y6zKkWGpXahJgTeIFN0jwo2cyeejKRNu+Zwk1cie k7KtdqshTgmb6LhhQUNE+sS4eGztxHaNrAiTGxwu8Gz9a2n1zLFQ0l1Vfav1l25+rqc9k5kv7G4fs U37RjJk91dI0jmtAyW+Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q6CKl-00Fzcm-1h; Mon, 05 Jun 2023 15:41:27 +0000 Received: from out-44.mta1.migadu.com ([95.215.58.44]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q6CKg-00FzTL-0M for linux-arm-kernel@lists.infradead.org; Mon, 05 Jun 2023 15:41:25 +0000 Date: Mon, 5 Jun 2023 15:41:10 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1685979676; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=GoZGAOTBvlr1nlPErXnetSaPgiXMcLx2bMeCqDLA1dk=; b=PivUa3rReYTnWwK9qzsAl7TVQSXztMg4Tj2jSXkRklNXzzHrH9eEHLzBq1b1cu/7VjtJAQ r3iniQ+ra6KyqjFwT2g0zigWYeRj+dReKT6T78yu35CWbJtDe0fLF7Qt64ZoPF9/0vbLKn ibqWLX433iGoUtvLnqtuA/o+6gp4rm8= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: Oliver Upton To: Catalin Marinas Cc: Kristina Martsenko , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, Will Deacon , Marc Zyngier , James Morse , Suzuki K Poulose , Zenghui Yu , Mark Rutland , Mark Brown , Luis Machado , Vladimir Murzin , linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 01/11] KVM: arm64: initialize HCRX_EL2 Message-ID: References: <20230509142235.3284028-1-kristina.martsenko@arm.com> <20230509142235.3284028-2-kristina.martsenko@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230605_084122_567360_54E91F19 X-CRM114-Status: GOOD ( 19.07 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Jun 02, 2023 at 02:49:50PM +0100, Catalin Marinas wrote: > On Tue, May 09, 2023 at 03:22:25PM +0100, Kristina Martsenko wrote: > > ARMv8.7/9.2 adds a new hypervisor configuration register HCRX_EL2. > > Initialize the register to a safe value (all fields 0), to be robust > > against firmware that has not initialized it. This is also needed to > > ensure that the register is reinitialized after a kexec by a future > > kernel. > > > > In addition, move SMPME setup over to the new flags, as it would > > otherwise get overridden. It is safe to set the bit even if SME is not > > (uniformly) supported, as it will write to a RES0 bit (having no > > effect), and SME will be disabled by the cpufeature framework. > > (Similar to how e.g. the API bit is handled in HCR_HOST_NVHE_FLAGS.) > > This looks fine to me but I may have lost track of the VHE/nVHE code > initialisation paths. > > Marc/Oliver, are you ok with this patch (or this series in general)? I'd > like to merge it through the arm64 tree. Acked-by: Oliver Upton -- Thanks, Oliver _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel