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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 828F8C5ACC2 for ; Mon, 16 Mar 2020 16:51:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 504B420736 for ; Mon, 16 Mar 2020 16:51:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584377486; bh=nk6wwF8pUt1K1x95HCkgB+QHeseB0pbsdmvD8seAupQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=EeoXmdLZ3qEdFXzDIC5ByrBJt5WR5QOaMuEdyZTcJqxETHUrh52+LQOFRyi9PBHr4 juW1P77TZ0J0LaYrVylWJBOjKYK+/0AHGF7QAKYKWIM44LhR3jVZGNe0LTgrXf7m6x J5S1Ulg1Ao5wWpVgNVNaiZylwyFGeIFfr3b5LfOA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732288AbgCPQvZ (ORCPT ); Mon, 16 Mar 2020 12:51:25 -0400 Received: from foss.arm.com ([217.140.110.172]:52324 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732273AbgCPQvX (ORCPT ); Mon, 16 Mar 2020 12:51:23 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D0FA7106F; Mon, 16 Mar 2020 09:51:22 -0700 (PDT) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 559D33F67D; Mon, 16 Mar 2020 09:51:22 -0700 (PDT) From: Mark Brown To: Catalin Marinas , Will Deacon Cc: Alexander Viro , Paul Elliott , Peter Zijlstra , Yu-cheng Yu , Amit Kachhap , Vincenzo Frascino , Marc Zyngier , Eugene Syromiatnikov , Szabolcs Nagy , "H . J . Lu " , Andrew Jones , Kees Cook , Arnd Bergmann , Jann Horn , Richard Henderson , =?UTF-8?q?Kristina=20Mart=C5=A1enko?= , Thomas Gleixner , Florian Weimer , Sudakshina Das , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-fsdevel@vger.kernel.org, Mark Brown Subject: [PATCH v10 11/13] arm64: mm: Display guarded pages in ptdump Date: Mon, 16 Mar 2020 16:50:53 +0000 Message-Id: <20200316165055.31179-12-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200316165055.31179-1-broonie@kernel.org> References: <20200316165055.31179-1-broonie@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v8.5-BTI introduces the GP field in stage 1 translation tables which indicates that blocks and pages with it set are guarded pages for which branch target identification checks should be performed. Decode this when dumping the page tables to aid debugging. Signed-off-by: Mark Brown Reviewed-by: Kees Cook --- arch/arm64/mm/dump.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/mm/dump.c b/arch/arm64/mm/dump.c index 860c00ec8bd3..78163b7a7dde 100644 --- a/arch/arm64/mm/dump.c +++ b/arch/arm64/mm/dump.c @@ -145,6 +145,11 @@ static const struct prot_bits pte_bits[] = { .val = PTE_UXN, .set = "UXN", .clear = " ", + }, { + .mask = PTE_GP, + .val = PTE_GP, + .set = "GP", + .clear = " ", }, { .mask = PTE_ATTRINDX_MASK, .val = PTE_ATTRINDX(MT_DEVICE_nGnRnE), -- 2.20.1