From patchwork Fri Jan 8 12:14:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Perret X-Patchwork-Id: 359224 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=-26.6 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_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 9CEB4C43381 for ; Fri, 8 Jan 2021 12:16:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6DC93238E4 for ; Fri, 8 Jan 2021 12:16:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726784AbhAHMQM (ORCPT ); Fri, 8 Jan 2021 07:16:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726133AbhAHMQL (ORCPT ); Fri, 8 Jan 2021 07:16:11 -0500 Received: from mail-wr1-x44a.google.com (mail-wr1-x44a.google.com [IPv6:2a00:1450:4864:20::44a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4759CC0612F6 for ; Fri, 8 Jan 2021 04:15:30 -0800 (PST) Received: by mail-wr1-x44a.google.com with SMTP id b8so4071020wrv.14 for ; Fri, 08 Jan 2021 04:15:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=2AvxqWsiNZiBgTFedPJYPTYC/iX22/lJxd+Fe6flKw0=; b=XIyewR3btdhcaLpqgHHf31EmI/fdUcLfY2l8kYP4b62kKxx9iTpjV2a87Z2iqPdVdh 3YXXLs/Ky8cj/4mgJkr2p7eSWVX+S+lIe4YQMowwmloU1LTRFbPQeCWsn7ja28FPpFxg PwX+aTx1oHZub2LCC/ssQtz+EkVTbbxzq0Eep7agFz+EkOn0+/LZFQHu6yoviR1jsOr2 MgFkYUmjkq+qlR91UBaqCSn/hp+eCjs3Wah+TaXvMZOZq8x5mZ4WEfPjCwP3SRodjLET 8G+W+2AnHQygsHUYleRZs3XIMWfRKcaN0SIjbYx3+NFR4g+Nhx4GGr7jVp9LAnWmo/lK i6Aw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=2AvxqWsiNZiBgTFedPJYPTYC/iX22/lJxd+Fe6flKw0=; b=XKVtC5UCCHMrtPQi2kZxkrfgvc+AxMQskYcP7yVFSab/4H8zBW+l/HPVm9m1DEWem0 84kEvR1lbk9osie+hZQ3lQshMgBFyrBqNZ8sC5Ks50NixpiYi4rkoZozkaMPzb/Yt3ce 1L0GpygiLgTRcOXGGkkXO/YkWJ2SEXyLj6IHEpvQ610Nc/tmuYcKMrxzWmv0xARMzFgM MPFG1h1AFqYRWVa+OH+FagmpStjaGD+Z99Pis0kvmLi3zaC1ZXN2LyU1JRqt7C+yS3Ei 601rZyKjYSqqRustOhvSgrxoi0jpaKZ3WY8AymqpXuvGFuvQdNR3qgdmSC2RSvTPC7zk Oa3g== X-Gm-Message-State: AOAM5324rHCYRHBZwfkJChE1F2jmOtrHoIPsQVHsWae8uWYcUOU7Xbws ENZDE7GoijTHS8wUFClAea0GqSsTY961 X-Google-Smtp-Source: ABdhPJyf1ctEy51fuFCix0vOeWng0452zHo1A6Dfvf1j1eurJXucg7DaQIxlCVhea+1iolch1bleRN20EdPf Sender: "qperret via sendgmr" X-Received: from r2d2-qp.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:1652]) (user=qperret job=sendgmr) by 2002:a1c:2c89:: with SMTP id s131mr1783892wms.0.1610108128579; Fri, 08 Jan 2021 04:15:28 -0800 (PST) Date: Fri, 8 Jan 2021 12:14:59 +0000 In-Reply-To: <20210108121524.656872-1-qperret@google.com> Message-Id: <20210108121524.656872-2-qperret@google.com> Mime-Version: 1.0 References: <20210108121524.656872-1-qperret@google.com> X-Mailer: git-send-email 2.30.0.284.gd98b1dd5eaa7-goog Subject: [RFC PATCH v2 01/26] arm64: lib: Annotate {clear, copy}_page() as position-independent From: Quentin Perret To: Catalin Marinas , Will Deacon , Marc Zyngier , James Morse , Julien Thierry , Suzuki K Poulose , Rob Herring , Frank Rowand Cc: devicetree@vger.kernel.org, android-kvm@google.com, linux-kernel@vger.kernel.org, kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Fuad Tabba , Mark Rutland , David Brazdil Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Will Deacon clear_page() and copy_page() are suitable for use outside of the kernel address space, so annotate them as position-independent code. Signed-off-by: Will Deacon Signed-off-by: Quentin Perret --- arch/arm64/lib/clear_page.S | 4 ++-- arch/arm64/lib/copy_page.S | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/lib/clear_page.S b/arch/arm64/lib/clear_page.S index 073acbf02a7c..b84b179edba3 100644 --- a/arch/arm64/lib/clear_page.S +++ b/arch/arm64/lib/clear_page.S @@ -14,7 +14,7 @@ * Parameters: * x0 - dest */ -SYM_FUNC_START(clear_page) +SYM_FUNC_START_PI(clear_page) mrs x1, dczid_el0 and w1, w1, #0xf mov x2, #4 @@ -25,5 +25,5 @@ SYM_FUNC_START(clear_page) tst x0, #(PAGE_SIZE - 1) b.ne 1b ret -SYM_FUNC_END(clear_page) +SYM_FUNC_END_PI(clear_page) EXPORT_SYMBOL(clear_page) diff --git a/arch/arm64/lib/copy_page.S b/arch/arm64/lib/copy_page.S index e7a793961408..29144f4cd449 100644 --- a/arch/arm64/lib/copy_page.S +++ b/arch/arm64/lib/copy_page.S @@ -17,7 +17,7 @@ * x0 - dest * x1 - src */ -SYM_FUNC_START(copy_page) +SYM_FUNC_START_PI(copy_page) alternative_if ARM64_HAS_NO_HW_PREFETCH // Prefetch three cache lines ahead. prfm pldl1strm, [x1, #128] @@ -75,5 +75,5 @@ alternative_else_nop_endif stnp x16, x17, [x0, #112 - 256] ret -SYM_FUNC_END(copy_page) +SYM_FUNC_END_PI(copy_page) EXPORT_SYMBOL(copy_page)