From patchwork Tue Apr 21 08:17:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zong Li X-Patchwork-Id: 11500813 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 97B691392 for ; Tue, 21 Apr 2020 08:19:07 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5FD25205C9 for ; Tue, 21 Apr 2020 08:19:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="g9IxzTh/"; dkim=pass (2048-bit key) header.d=sifive.com header.i=@sifive.com header.b="d1EGEWeH" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5FD25205C9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id:Date :Subject:To:From:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ESIASWIVcw318N0kQ2X0Oi3Z+uroC+zqbTtsgDKDwxc=; b=g9IxzTh/68c3tZ 2OSquAAEU2/Hke4Bz493oL2UcmY0gx9w6WLMWI2uFuDr3f1p5xs7J0NEn08HHcwk9XdNdPiAGhP2U zvhkiq4YLKKpHYHrqiIOCoFYajv9Rx7pXf3+N3GJ/aGMn35sWYmXFi9nC3hLByamZVan5nVRJ1y7i BOGcVBaZ6uXIG2hOBseOFpIcjLTc25U2a3FqgOSO4xVnVm9VvcVUziv7DHv/VAxhpNBKGFg1athRr gDbmIcrPipK881m3dqqJUeorWlqGpb1Yt17w4HifrhzfajHVyd8AJKfoKEb/uMlJm7P4KQmSwVOsp tdklFhxIY0dAO16qK5Ew==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jQo7U-0000SF-4w; Tue, 21 Apr 2020 08:19:04 +0000 Received: from mail-pj1-x1041.google.com ([2607:f8b0:4864:20::1041]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jQo63-0007Xs-23 for linux-riscv@lists.infradead.org; Tue, 21 Apr 2020 08:17:37 +0000 Received: by mail-pj1-x1041.google.com with SMTP id hi11so1054982pjb.3 for ; Tue, 21 Apr 2020 01:17:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ESIASWIVcw318N0kQ2X0Oi3Z+uroC+zqbTtsgDKDwxc=; b=d1EGEWeHYHIQOJqJjvQeV7F5XbEP5dKBW7WEsc7KqFePlpur3HEhURVt2nLAxU8R+t LZja7jNyrv/MqDehV+bIv3O2awu6Vc6wo5ja/99Fg3/zkOA/b8rUd12iwLrEVBqYNlL8 LTf7evXymEDmOXlZdm6r9x20Y2/6tY/73gMtdIWA1Ts91bYya8o7iZL7Qbyo1a9l5cHq Mb2NIZKnrqizgtSPU1Euc0ALQsGOdKx8TVzUdXCIOumRJtoGHAnWec62IkND8QTrmOQM nPH12sz33bLqzDbK623zAsgvXfGv/SPO4JkjRvc6iRfRE03SIsd9LDw4+o2qcXqrSP8N SPpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ESIASWIVcw318N0kQ2X0Oi3Z+uroC+zqbTtsgDKDwxc=; b=t79u8W59JyKAX4+fue1FKfay2z2xPrxNBxIKDCOIkxTOBimJ9QnSo4G5myE2hdZJhQ 76N7+3wNjO90DPg0UJ2e9dU4U8UeJwW/USwVJ2dQFp+i0G5DkhELO8s1KDRHHZL7+tYW mBdP30mNU1XrLpdiK/14SAZ5zbhBuWbYAVMo59uvp7j+VHyTUiZfnU5y0e5ylscGsoQy AOB4PlTlFeHbhCqsU4foUkIPhXUP/HA8E0t7/G/gBqWrVq7Qrhh4eir3Hk033B9gzIP5 z6e0OoA621nqImuCz2d6QkNy45XH4s5W1LlwF9gmmVhHybGn/ELhuN/ZuWJG5p4vmIK+ 8SzQ== X-Gm-Message-State: AGi0PuZnOsh6Db83kbqDb+PAp7kVm4k2tGqzbkSOo6ZcZiRzXGt5H4/Y zhfs6te7yjlvUTvm1xv1RIx54w== X-Google-Smtp-Source: APiQypI7y+F6n5TeayUTsoUy+jp+f5r/1IV7aARGN/1mj8/tNHv7iVWTrDqjni/i9mOVUg3YAWeuFQ== X-Received: by 2002:a17:90a:7e4:: with SMTP id m91mr4322055pjm.155.1587457053972; Tue, 21 Apr 2020 01:17:33 -0700 (PDT) Received: from hsinchu02.internal.sifive.com (114-34-229-221.HINET-IP.hinet.net. [114.34.229.221]) by smtp.gmail.com with ESMTPSA id v9sm1610067pju.3.2020.04.21.01.17.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Apr 2020 01:17:33 -0700 (PDT) From: Zong Li To: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, paul.walmsley@sifive.com, palmer@dabbelt.com, linux-riscv@lists.infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 3/4] x86: mm: use ARCH_HAS_DEBUG_WX instead of arch defined Date: Tue, 21 Apr 2020 16:17:14 +0800 Message-Id: <430736828d149df3f5b462d291e845ec690e0141.1587455584.git.zong.li@sifive.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200421_011735_108537_54CC959A X-CRM114-Status: GOOD ( 11.00 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:1041 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zong Li Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org Extract DEBUG_WX to mm/Kconfig.debug for shared use. Change to use ARCH_HAS_DEBUG_WX instead of DEBUG_WX defined by arch port. Signed-off-by: Zong Li --- arch/x86/Kconfig | 1 + arch/x86/Kconfig.debug | 27 --------------------------- 2 files changed, 1 insertion(+), 27 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1d6104ea8af0..310a49ee3c25 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -80,6 +80,7 @@ config X86 select ARCH_HAS_SYNC_CORE_BEFORE_USERMODE select ARCH_HAS_SYSCALL_WRAPPER select ARCH_HAS_UBSAN_SANITIZE_ALL + select ARCH_HAS_DEBUG_WX select ARCH_HAVE_NMI_SAFE_CMPXCHG select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI select ARCH_MIGHT_HAVE_PC_PARPORT diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 2e74690b028a..de1846ed41b3 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -72,33 +72,6 @@ config EFI_PGT_DUMP issues with the mapping of the EFI runtime regions into that table. -config DEBUG_WX - bool "Warn on W+X mappings at boot" - select PTDUMP_CORE - ---help--- - Generate a warning if any W+X mappings are found at boot. - - This is useful for discovering cases where the kernel is leaving - W+X mappings after applying NX, as such mappings are a security risk. - - Look for a message in dmesg output like this: - - x86/mm: Checked W+X mappings: passed, no W+X pages found. - - or like this, if the check failed: - - x86/mm: Checked W+X mappings: FAILED, W+X pages found. - - Note that even if the check fails, your kernel is possibly - still fine, as W+X mappings are not a security hole in - themselves, what they do is that they make the exploitation - of other unfixed kernel bugs easier. - - There is no runtime or memory usage effect of this option - once the kernel has booted up - it's a one time check. - - If in doubt, say "Y". - config DOUBLEFAULT default y bool "Enable doublefault exception handler" if EXPERT && X86_32