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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 C5F47C3F2D4 for ; Fri, 6 Mar 2020 06:40:20 +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 97AAD2072D for ; Fri, 6 Mar 2020 06:40:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="b9ucGLl3" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97AAD2072D 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+infradead-linux-arm-kernel=archiver.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=c2DdwtDuhvb/jC6aqaBRU/z2KYNUyJ9D4n33rNECdbc=; b=b9ucGLl3KcdwJyGKuo+iS2ZGqv atyV6TWcVX1+/Dkxj2V84P1gMyElXuJSlxXPj3OJdIgL/HraNLrEascu5h/LvsXGomYH0SkhhriIK 88ZuwCn2c7GtmhUGM/WroCdk+54SN+FRzZ2pcNsm0oAcx/9F//7c9Q9xo019A/wqHdWzlvNz2v2bv Abvz+pyF4woA3lIw0+4ZfDkc6X845kyVvAk+osjnbejyCQCZl5UJzG+bcXngioucevLQZ9hXzUvtl DswoYrD8IxVEJ7mFbmhIyqGpZa2KU6Eg27rNqDfqP0StHsJbOnKzk7+Jd8Yyj9IM7KwAflG83DoQI sm9dsTdA==; 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 1jA6eh-0001Hq-VM; Fri, 06 Mar 2020 06:40:19 +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 1jA6bB-0005X4-BQ for linux-arm-kernel@lists.infradead.org; Fri, 06 Mar 2020 06:36:43 +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 E1CBE30E; Thu, 5 Mar 2020 22:36:40 -0800 (PST) Received: from a075553-lin.blr.arm.com (a075553-lin.blr.arm.com [10.162.17.32]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id E11233F6CF; Thu, 5 Mar 2020 22:40:32 -0800 (PST) From: Amit Daniel Kachhap To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 15/18] arm64: suspend: restore the kernel ptrauth keys Date: Fri, 6 Mar 2020 12:05:22 +0530 Message-Id: <1583476525-13505-16-git-send-email-amit.kachhap@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583476525-13505-1-git-send-email-amit.kachhap@arm.com> References: <1583476525-13505-1-git-send-email-amit.kachhap@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200305_223641_523236_A9F549FF X-CRM114-Status: GOOD ( 10.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , Suzuki K Poulose , Catalin Marinas , Kristina Martsenko , Dave Martin , Mark Brown , James Morse , Ramana Radhakrishnan , Amit Daniel Kachhap , Vincenzo Frascino , Will Deacon , Ard Biesheuvel MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org This patch restores the kernel keys from current task during cpu resume after the mmu is turned on and ptrauth is enabled. A flag is added in macro ptrauth_keys_install_kernel to check if isb instruction needs to executed. Signed-off-by: Amit Daniel Kachhap --- Changes since v5: * Moved ptrauth_keys_install_kernel inside function cpu_do_resume. * Added a flag in ptrauth_keys_install_kernel to provide options for isb instruction. arch/arm64/include/asm/asm_pointer_auth.h | 6 ++++-- arch/arm64/kernel/entry.S | 4 ++-- arch/arm64/mm/proc.S | 2 ++ 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/asm_pointer_auth.h b/arch/arm64/include/asm/asm_pointer_auth.h index 4152afe..899a007 100644 --- a/arch/arm64/include/asm/asm_pointer_auth.h +++ b/arch/arm64/include/asm/asm_pointer_auth.h @@ -39,14 +39,16 @@ alternative_if ARM64_HAS_GENERIC_AUTH alternative_else_nop_endif .endm - .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 + .macro ptrauth_keys_install_kernel tsk, sync, tmp1, tmp2, tmp3 alternative_if ARM64_HAS_ADDRESS_AUTH mov \tmp1, #THREAD_KEYS_KERNEL add \tmp1, \tsk, \tmp1 ldp \tmp2, \tmp3, [\tmp1, #PTRAUTH_KERNEL_KEY_APIA] msr_s SYS_APIAKEYLO_EL1, \tmp2 msr_s SYS_APIAKEYHI_EL1, \tmp3 + .if \sync == 1 isb + .endif alternative_else_nop_endif .endm @@ -55,7 +57,7 @@ alternative_else_nop_endif .macro ptrauth_keys_install_user tsk, tmp1, tmp2, tmp3 .endm - .macro ptrauth_keys_install_kernel tsk, tmp1, tmp2, tmp3 + .macro ptrauth_keys_install_kernel tsk, sync, tmp1, tmp2, tmp3 .endm #endif /* CONFIG_ARM64_PTR_AUTH */ diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 3dad2d0..6273d7b 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -178,7 +178,7 @@ alternative_cb_end apply_ssbd 1, x22, x23 - ptrauth_keys_install_kernel tsk, x20, x22, x23 + ptrauth_keys_install_kernel tsk, 1, x20, x22, x23 .else add x21, sp, #S_FRAME_SIZE get_current_task tsk @@ -900,7 +900,7 @@ ENTRY(cpu_switch_to) ldr lr, [x8] mov sp, x9 msr sp_el0, x1 - ptrauth_keys_install_kernel x1, x8, x9, x10 + ptrauth_keys_install_kernel x1, 1, x8, x9, x10 ret ENDPROC(cpu_switch_to) NOKPROBE(cpu_switch_to) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 5a11a89..4450dc8 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -137,6 +138,7 @@ alternative_if ARM64_HAS_RAS_EXTN msr_s SYS_DISR_EL1, xzr alternative_else_nop_endif + ptrauth_keys_install_kernel x14, 0, x1, x2, x3 isb ret SYM_FUNC_END(cpu_do_resume) -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel