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=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 6F616C35677 for ; Thu, 27 Feb 2020 17:44:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 48E5D246A3 for ; Thu, 27 Feb 2020 17:44:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582825491; bh=nk6wwF8pUt1K1x95HCkgB+QHeseB0pbsdmvD8seAupQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CVPq2ARrecOj74p1mW7vIoMYkX1mM8zYmPq+HEqgjrYxcRmJCifzkcm4VtFsJQ2Uh w72NWaNvnvdFTMlchdkK1VkmDyO8Mx6GvS5hydzHB89DSvYyuM2CGa38sX0EoKF6qJ qqT94ZDLXk4GoDC0CMB9k7v9Sn9Sgb7R2IBVgTSI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730784AbgB0Rot (ORCPT ); Thu, 27 Feb 2020 12:44:49 -0500 Received: from foss.arm.com ([217.140.110.172]:55724 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730705AbgB0Ros (ORCPT ); Thu, 27 Feb 2020 12:44:48 -0500 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 D837F4B2; Thu, 27 Feb 2020 09:44:47 -0800 (PST) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2682B3F73B; Thu, 27 Feb 2020 09:44:47 -0800 (PST) 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 v8 11/11] arm64: mm: Display guarded pages in ptdump Date: Thu, 27 Feb 2020 17:44:17 +0000 Message-Id: <20200227174417.23722-12-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200227174417.23722-1-broonie@kernel.org> References: <20200227174417.23722-1-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