Message ID | 1574166746-27197-12-git-send-email-amit.kachhap@arm.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <SRS0=yEOp=ZL=lists.infradead.org=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@kernel.org> 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 F1CC31593 for <patchwork-linux-arm@patchwork.kernel.org>; Tue, 19 Nov 2019 12:36:20 +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 D0196222A7 for <patchwork-linux-arm@patchwork.kernel.org>; Tue, 19 Nov 2019 12:36:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="spR1wnv0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D0196222A7 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=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: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=lQa6GzCdG47xczExgh0aNwcP9deAFccYCTTGMPG0ARQ=; b=spR1wnv0ZyxecoBiuQj4vstRjY m4bDvX6FzaLc26e/oWMN2YCb+oBOXHOmz/LAMCHYPjjXJHfwSwvI+di6bcZNdTeI6cRd1/B3FKJRj 2qu2eQSbIFdmru3Ar0edN7FAYBdDceIvn2NW4sNsyVqr3mMl5LQ+0RtXJgr8ilLkONb5m5112Vav6 h28v1JaeKSMwP+1DYPp1r+GbOqAEhTuFa5+8xjNvBSAIh3p86G6lAYUtW0VKW5yxZxHmCKjiKDNMO fGPB76XeSYL0cJdSgTVec3iFoHrALFdWzexpn+vkrkmt/NxG3SMYiH5lSaGgTLYbuH1T+0kGvnYOT MM9B4Zlw==; 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 1iX2jy-0002PQ-07; Tue, 19 Nov 2019 12:36:18 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iX2hT-0007JH-8Q for linux-arm-kernel@lists.infradead.org; Tue, 19 Nov 2019 12:33:47 +0000 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 316791FB; Tue, 19 Nov 2019 04:33:42 -0800 (PST) Received: from a075553-lin.blr.arm.com (a075553-lin.blr.arm.com [10.162.0.144]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id AEB433F703; Tue, 19 Nov 2019 04:33:38 -0800 (PST) From: Amit Daniel Kachhap <amit.kachhap@arm.com> To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 11/14] arm64: suspend: restore the kernel ptrauth keys Date: Tue, 19 Nov 2019 18:02:23 +0530 Message-Id: <1574166746-27197-12-git-send-email-amit.kachhap@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1574166746-27197-1-git-send-email-amit.kachhap@arm.com> References: <1574166746-27197-1-git-send-email-amit.kachhap@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191119_043343_570557_D1CCE401 X-CRM114-Status: UNSURE ( 9.40 ) X-CRM114-Notice: Please train this message. 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arm64: return address signing
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expand
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diff --git a/arch/arm64/kernel/sleep.S b/arch/arm64/kernel/sleep.S index 7b2f2e6..a6e9460 100644 --- a/arch/arm64/kernel/sleep.S +++ b/arch/arm64/kernel/sleep.S @@ -2,6 +2,7 @@ #include <linux/errno.h> #include <linux/linkage.h> #include <asm/asm-offsets.h> +#include <asm/asm_pointer_auth.h> #include <asm/assembler.h> #include <asm/smp.h> @@ -139,6 +140,11 @@ ENTRY(_cpu_resume) bl kasan_unpoison_task_stack_below #endif +#ifdef CONFIG_ARM64_PTR_AUTH + get_current_task x1 + ptrauth_keys_install_kernel x1, x2, x3, x4 +#endif + ldp x19, x20, [x29, #16] ldp x21, x22, [x29, #32] ldp x23, x24, [x29, #48]
This patch restores the kernel keys from current task during cpu resume after the mmu is turned on and ptrauth is enabled. Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com> --- Change since last version: * None arch/arm64/kernel/sleep.S | 6 ++++++ 1 file changed, 6 insertions(+)