From patchwork Tue Mar 23 20:39:40 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sami Tolvanen X-Patchwork-Id: 12159279 X-Patchwork-Delegate: kuba@kernel.org 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=-26.3 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, USER_AGENT_GIT,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 EAB3DC43332 for ; Tue, 23 Mar 2021 20:41:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DAE3D619E1 for ; Tue, 23 Mar 2021 20:41:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233641AbhCWUkj (ORCPT ); Tue, 23 Mar 2021 16:40:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233513AbhCWUkK (ORCPT ); Tue, 23 Mar 2021 16:40:10 -0400 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0A3DC0613D8 for ; Tue, 23 Mar 2021 13:40:09 -0700 (PDT) Received: by mail-qv1-xf4a.google.com with SMTP id o14so1724qvn.18 for ; Tue, 23 Mar 2021 13:40:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=bxVrKYuxs5XU9fnnKC3lGs6PXwAVYnFmVHHh5prD+bw=; b=tT+mhGxcn72LL+S/wxj6p6pgongKWrRuo4s35bHXpLA2dicqXg5urUYbPt3d9T/ByR IPHjRKTiXQnv2rbt1aRKlxrdR2rPLJ7tORytyy1drMdPlsn4xgMEb2VaXi9KnmRXw0b+ 1McGQM2Thg4csg/H4j9okV5jZZhUrLRSHuFW27uwZsHK3LpCc5+cy7/TMp0EDcRjnuha JF7+v1vVLu+/0lrJCTHtkCwIx8QFpif22GcIKNGwCbR4j/Je8b9blw7GwduI3m2NOHlM YfgJo/D20uuFbhQvjr6gzbOj6Nv05LUXHIHdnyfSlGGvEfwFsp60pVuwWb09eTm3iH6Q VSag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=bxVrKYuxs5XU9fnnKC3lGs6PXwAVYnFmVHHh5prD+bw=; b=O2NsgKkNtvtFKGpbmnUyo7h/PohhY4N/FoQT4O3QMpA6yoqmhcsfIFSMpChurSLeIl WOPxbD254g8l4FYmwdwWUX5Kv9J6wCXv+V3QntrrQYLdsqWOnfZsnbxmzwx4FeEG39um C0t2Rf2eop00PZ4FWunHo/hXSw11LDDkfHgHRORmMjFvi6eHQt9Uo+9/f075xQJBSEMF WljG04NPo3rsscI4Qk9KGLQWv+jnv1ur/tND8b29VJza0mTJCehrZs0khRmznuDqzu4W 4KbHYOiMrAjqsgmIJNqal8yuVBl4oRjFpKSZPv7IV1xZgdKlDp6t9p6eqtSf0dpwSR5d r5xQ== X-Gm-Message-State: AOAM5324CCusP1YfpYTX7cUCpaiq+mY6AaKnDxaWWH9+9BO3wcFL81Mf b2PyZC/mDQD8jzFIkWU04c2Rt1lOiZd+J4ydJtU= X-Google-Smtp-Source: ABdhPJx9XxcfFaPwjV0eKcB1u5Is4MdpwwvMvMA5rF3C3ca6pKmdXd3MtbY+z05x6lmX/nx6Kd3vneHRgp5+amu1pQk= X-Received: from samitolvanen1.mtv.corp.google.com ([2620:15c:201:2:e9a3:260d:763b:67dc]) (user=samitolvanen job=sendgmr) by 2002:a05:6214:aae:: with SMTP id ew14mr188842qvb.24.1616532008942; Tue, 23 Mar 2021 13:40:08 -0700 (PDT) Date: Tue, 23 Mar 2021 13:39:40 -0700 In-Reply-To: <20210323203946.2159693-1-samitolvanen@google.com> Message-Id: <20210323203946.2159693-12-samitolvanen@google.com> Mime-Version: 1.0 References: <20210323203946.2159693-1-samitolvanen@google.com> X-Mailer: git-send-email 2.31.0.291.g576ba9dcdaf-goog Subject: [PATCH v3 11/17] psci: use __pa_function for cpu_resume From: Sami Tolvanen To: Kees Cook Cc: Nathan Chancellor , Nick Desaulniers , Masahiro Yamada , Will Deacon , Jessica Yu , Arnd Bergmann , Tejun Heo , "Paul E. McKenney" , Christoph Hellwig , Peter Zijlstra , bpf@vger.kernel.org, linux-hardening@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Sami Tolvanen Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org With CONFIG_CFI_CLANG, the compiler replaces function pointers with jump table addresses, which results in __pa_symbol returning the physical address of the jump table entry. As the jump table contains an immediate jump to an EL1 virtual address, this typically won't work as intended. Use __pa_function instead to get the address to cpu_resume. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook --- drivers/firmware/psci/psci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c index f5fc429cae3f..facd3cce3244 100644 --- a/drivers/firmware/psci/psci.c +++ b/drivers/firmware/psci/psci.c @@ -326,7 +326,7 @@ static int psci_suspend_finisher(unsigned long state) { u32 power_state = state; - return psci_ops.cpu_suspend(power_state, __pa_symbol(cpu_resume)); + return psci_ops.cpu_suspend(power_state, __pa_function(cpu_resume)); } int psci_cpu_suspend_enter(u32 state) @@ -345,7 +345,7 @@ int psci_cpu_suspend_enter(u32 state) static int psci_system_suspend(unsigned long unused) { return invoke_psci_fn(PSCI_FN_NATIVE(1_0, SYSTEM_SUSPEND), - __pa_symbol(cpu_resume), 0, 0); + __pa_function(cpu_resume), 0, 0); } static int psci_system_suspend_enter(suspend_state_t state)