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,URIBL_BLOCKED,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 EF051C0044D for ; Wed, 11 Mar 2020 19:33:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DC6DB2073E for ; Wed, 11 Mar 2020 19:33:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583955209; bh=nk6wwF8pUt1K1x95HCkgB+QHeseB0pbsdmvD8seAupQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xZ/oRHPDyRl5rY0VdIJCFvi0qoCfgxmDVtG0FfLaKT1Cds8PTup587HhVKg+u/eCJ aQuOR7GIlk7y37eI8xo9kfzBq7eByBDIVi3XbPQ7LMVHQ29ZrRqAqikWpdrHvTykTQ lCTzvpPER6cQdtxWYdYHpyzs8R2p03kJcwtLxZlM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731387AbgCKTd0 (ORCPT ); Wed, 11 Mar 2020 15:33:26 -0400 Received: from foss.arm.com ([217.140.110.172]:54420 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731365AbgCKTdX (ORCPT ); Wed, 11 Mar 2020 15:33:23 -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 D8C7C1FB; Wed, 11 Mar 2020 12:33:22 -0700 (PDT) Received: from localhost (unknown [10.37.6.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 396BF3F534; Wed, 11 Mar 2020 12:33:22 -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 v9 11/13] arm64: mm: Display guarded pages in ptdump Date: Wed, 11 Mar 2020 19:26:06 +0000 Message-Id: <20200311192608.40095-12-broonie@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200311192608.40095-1-broonie@kernel.org> References: <20200311192608.40095-1-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