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=-18.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL 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 91C60C388F9 for ; Mon, 23 Nov 2020 14:03:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 37B052080A for ; Mon, 23 Nov 2020 14:03:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ltVKPu+m" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729939AbgKWOC5 (ORCPT ); Mon, 23 Nov 2020 09:02:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729204AbgKWOC4 (ORCPT ); Mon, 23 Nov 2020 09:02:56 -0500 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0EB8C0613CF for ; Mon, 23 Nov 2020 06:02:55 -0800 (PST) Received: by mail-wm1-x341.google.com with SMTP id p19so13221996wmg.0 for ; Mon, 23 Nov 2020 06:02:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=8MbLOzoiGt8qOrDnUA/zH8u0u0zSMC0gXKfi559DqVA=; b=ltVKPu+mf3w4cnT/dnxBHhtwTdvH5234a5m0Aas+h+d2O+deloN4yvQEqWA5jdgL7J BBwCdHTKDne3rtZS0479aN3cO3cK+qHE6RJeFtQD88SABrLknnTJIWPt7vFegoL9JAMW tfJ66juRzDAMcoPc3Q0qet+A+HXN7V++y5x4xM2kc9zgzhx3h6U57HdwASSxRI5xat96 BhPR4KyhD3Do/OEx1hLna61IZUxVJpjCstJkxu9okbRxbT/18JE9VgsD6QeRJo/OjI6z GfIEjP7OFlskU0BPW9s0Lm8eEjmI5XyUFsIp0EVclLPkh5UQlfPxKshKoo9TN39JqMei EP8Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=8MbLOzoiGt8qOrDnUA/zH8u0u0zSMC0gXKfi559DqVA=; b=DbVNvBzlZexGboTuDF9hJb+WnzDfNtBUmJoD/zTjZ4vgwt06COz5JE6eW3nvBoOrQK DcinnASFgrY7uTm8ShMIH78gdMffh36kFNe72Ysw4S7ZaaQvNiqevwhyAN5q2SMzWo3Z 1rSQcwbncTdGic918/eqFtjA4KaCHyD6j7OQByYCcg0RI2O9ttHDT/V8OkyAgcVxhxXh JPnAaioOrEMfa+1DLM5UetkXMx+UtPrYviWcDGIX6+KKjdOglvGT877Z3Y9Al0C9wUDK dQ2coeKkSrdrwVIm/nlMXE6/IjLCuxawaLoYtaFbVSt8r6IoYqtx5wj/Emq3GzM506Tm BnwQ== X-Gm-Message-State: AOAM5303ivNx9LKzChM/waldDTYHNGnimw7aIE7fW/plVp4kHKpz4xej 5XQyDMQLJX5WQp/lo79BfkbCZg== X-Google-Smtp-Source: ABdhPJxjgLyk9Fulttys1g8vPl1CXFrXrd8EhtH74rQmWAECciCrmgsHxN+h0I4wxVN09sd5aywgVA== X-Received: by 2002:a7b:c24b:: with SMTP id b11mr23203780wmj.109.1606140174472; Mon, 23 Nov 2020 06:02:54 -0800 (PST) Received: from google.com ([2a00:79e0:d:210:f693:9fff:fef4:a7ef]) by smtp.gmail.com with ESMTPSA id x13sm8390719wmj.48.2020.11.23.06.02.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Nov 2020 06:02:54 -0800 (PST) Date: Mon, 23 Nov 2020 14:02:50 +0000 From: Quentin Perret To: David Brazdil Cc: Catalin Marinas , Will Deacon , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Rob Herring , Frank Rowand , "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" , open list , "open list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" , kernel-team@android.com, android-kvm@google.com Subject: Re: [RFC PATCH 09/27] KVM: arm64: Allow using kvm_nvhe_sym() in hyp code Message-ID: <20201123140250.GB490744@google.com> References: <20201117181607.1761516-1-qperret@google.com> <20201117181607.1761516-10-qperret@google.com> <20201123125723.4mnodg3tnal4q4v2@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201123125723.4mnodg3tnal4q4v2@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Monday 23 Nov 2020 at 12:57:23 (+0000), David Brazdil wrote: > > diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > > index 882eb383bd75..391cf6753a13 100644 > > --- a/arch/arm64/kvm/arm.c > > +++ b/arch/arm64/kvm/arm.c > > @@ -1369,7 +1369,7 @@ static void cpu_prepare_hyp_mode(int cpu) > > > > params->vector_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref(__kvm_hyp_host_vector)); > > params->stack_hyp_va = kern_hyp_va(per_cpu(kvm_arm_hyp_stack_page, cpu) + PAGE_SIZE); > > - params->entry_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref(__kvm_hyp_psci_cpu_entry)); > > + params->entry_hyp_va = kern_hyp_va((unsigned long)kvm_ksym_ref_nvhe(__kvm_hyp_psci_cpu_entry)); > > Why is this change needed? You mean this line specifically or the whole __kvm_hyp_psci_cpu_entry thing? For the latter, it is to avoid having the compiler complain about __kvm_hyp_psci_cpu_entry being re-defined as a different symbol. If there is a better way to solve this problem I'm happy to change it -- I must admit I got a little confused with the namespacing along the way. Thanks, Quentin