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=-23.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 9FCE8C6379D for ; Mon, 23 Nov 2020 12:34:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 412C6208C3 for ; Mon, 23 Nov 2020 12:34:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="M992dxd2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731391AbgKWMef (ORCPT ); Mon, 23 Nov 2020 07:34:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731366AbgKWMe2 (ORCPT ); Mon, 23 Nov 2020 07:34:28 -0500 Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B1FE5C061A4D for ; Mon, 23 Nov 2020 04:34:28 -0800 (PST) Received: by mail-wm1-x343.google.com with SMTP id d142so17719843wmd.4 for ; Mon, 23 Nov 2020 04:34:28 -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=9ZjO/kg/ZyQBzHgAo7+6n9tS4H4jKirnAxxmVXvH/yc=; b=M992dxd2tit7xNFnltCm7IKEDMdlnmQGCe8L5HxLpyARAZse097Av2j/VAIWecNH3m bJD+3EDrsh/k+G08pWWz5IJCJd1iwyLpBdfnINWsvXgBH0tfbK2u04BrazZWO+Jo49zy yh3iWmzRhuMtjd2JI7q+Gb5w9cjBK3HqqCmSre9UFgSOna7kNL626foIzmVYCIrYe/93 Qp5+sKy4TAindANud2ZsE1u/VMhU0+QZZ4fy+VOQ5k8mbFKCyHOL4BGH/49geVbGKALP aed65X9OM2QRaPt6uBOY49PSxEmgZcC/XdnzywKBaD0U8jyA3urZlDqlFsWzPdOkG0nh VjRA== 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=9ZjO/kg/ZyQBzHgAo7+6n9tS4H4jKirnAxxmVXvH/yc=; b=kYQD5pCz7ZS27FOY0ObdSwK8EQp+V/t52r0R3aTl7ZAdbWmRtJ2RH/Zf6vE8FOtInU 83rQY28mlwjUg/NW+Hbi7IZT+YMZekST42GX4wbeFB/8AjCqEl9ECLY1gnuZ1fZhS7qi P51u2AcdYqLzlKX5TwO3FWzIt8EVaxgWBm7RxEPzZtQgJuKjLYaqi87EvKlzGiDADeZO btGKHftTgP+ux1pr6P1PmfzRSDtU8B0CUbAJSHTo8bidx8adsH+/EmfTdBnZypIDKRhv tyDHMzn3zpWjUtUqlFMUVj/tpoDXfgxqnbKXo35ydsxiWvFAvdP7AKV6tRGmxhaXifyc spkA== X-Gm-Message-State: AOAM5326TYU4Nv3/oht0mzhYrKSuM0NJvtsPj/efXcbpfhlg+81j7eYX yIgbCv/D7SkYYW7o4+hds/S47g== X-Google-Smtp-Source: ABdhPJwSjPl1MftPJmQUSt0CDAQ26Ikg4YZNe+FEtt3uYPrzCayTOdXmpbrYKg2gwpnbE1eL73qqnQ== X-Received: by 2002:a1c:7e87:: with SMTP id z129mr23400394wmc.176.1606134867262; Mon, 23 Nov 2020 04:34:27 -0800 (PST) Received: from google.com ([2a01:4b00:8523:2d03:acac:b2ef:c7d:fd8a]) by smtp.gmail.com with ESMTPSA id j71sm16889889wmj.10.2020.11.23.04.34.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Nov 2020 04:34:26 -0800 (PST) Date: Mon, 23 Nov 2020 12:34:25 +0000 From: David Brazdil To: Quentin Perret 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 02/27] KVM: arm64: Link position-independent string routines into .hyp.text Message-ID: <20201123123425.uzfuk3pmwgzuijwn@google.com> References: <20201117181607.1761516-1-qperret@google.com> <20201117181607.1761516-3-qperret@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201117181607.1761516-3-qperret@google.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Nov 17, 2020 at 06:15:42PM +0000, 'Quentin Perret' via kernel-team wrote: > From: Will Deacon > > Pull clear_page(), copy_page(), memcpy() and memset() into the nVHE hyp > code and ensure that we always execute the '__pi_' entry point on the > offchance that it changes in future. > > [ qperret: Commit title nits ] > > Signed-off-by: Will Deacon > Signed-off-by: Quentin Perret > --- > arch/arm64/kernel/image-vars.h | 11 +++++++++++ > arch/arm64/kvm/hyp/nvhe/Makefile | 4 ++++ > 2 files changed, 15 insertions(+) > > diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h > index 8539f34d7538..dd8ccc9efb6a 100644 > --- a/arch/arm64/kernel/image-vars.h > +++ b/arch/arm64/kernel/image-vars.h > @@ -105,6 +105,17 @@ KVM_NVHE_ALIAS(__stop___kvm_ex_table); > /* Array containing bases of nVHE per-CPU memory regions. */ > KVM_NVHE_ALIAS(kvm_arm_hyp_percpu_base); > > +/* Position-independent library routines */ > +__kvm_nvhe_clear_page = __kvm_nvhe___pi_clear_page; > +__kvm_nvhe_copy_page = __kvm_nvhe___pi_copy_page; > +__kvm_nvhe_memcpy = __kvm_nvhe___pi_memcpy; > +__kvm_nvhe_memset = __kvm_nvhe___pi_memset; > + > +#ifdef CONFIG_KASAN > +__kvm_nvhe___memcpy = __kvm_nvhe___pi_memcpy; > +__kvm_nvhe___memset = __kvm_nvhe___pi_memset; > +#endif > + > #endif /* CONFIG_KVM */ Nit: Would be good to use the kvm_nvhe_sym() helper for the namespacing. And feel free to define something like KVM_NVHE_ALIAS for PI in hyp-image.h. > > #endif /* __ARM64_KERNEL_IMAGE_VARS_H */ > diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile > index 1f1e351c5fe2..590fdefb42dd 100644 > --- a/arch/arm64/kvm/hyp/nvhe/Makefile > +++ b/arch/arm64/kvm/hyp/nvhe/Makefile > @@ -6,10 +6,14 @@ > asflags-y := -D__KVM_NVHE_HYPERVISOR__ > ccflags-y := -D__KVM_NVHE_HYPERVISOR__ > > +lib-objs := clear_page.o copy_page.o memcpy.o memset.o > +lib-objs := $(addprefix ../../../lib/, $(lib-objs)) > + > obj-y := timer-sr.o sysreg-sr.o debug-sr.o switch.o tlb.o hyp-init.o host.o \ > hyp-main.o hyp-smp.o psci-relay.o > obj-y += ../vgic-v3-sr.o ../aarch32.o ../vgic-v2-cpuif-proxy.o ../entry.o \ > ../fpsimd.o ../hyp-entry.o ../exception.o > +obj-y += $(lib-objs) > > ## > ## Build rules for compiling nVHE hyp code > -- > 2.29.2.299.gdc1121823c-goog > > -- > To unsubscribe from this group and stop receiving emails from it, send an email to kernel-team+unsubscribe@android.com. >