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,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 B2AFCC2F3A0 for ; Mon, 21 Jan 2019 14:08:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8306620861 for ; Mon, 21 Jan 2019 14:08:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548079705; bh=6/x5wFDZavZaq5ZQsh17g8qJp4UW82s1VcttdSl5dZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JcETwa/G8/gHRCUVg26Fx/idaC+DFtJVGEbn9mVCY8mk7PwYQ6UE5B7IfX6raVhLT /QVh9MR02snWlDcA8QNfnROeZvPDmyzcBaEEMcb181HcuMnX9yNxohjuN2JQVpU3oi oQ3DKIym47rbWGHD7XofRlLe+j9KIskEIeJ215f4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731729AbfAUOIY (ORCPT ); Mon, 21 Jan 2019 09:08:24 -0500 Received: from mail.kernel.org ([198.145.29.99]:44462 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732014AbfAUN6r (ORCPT ); Mon, 21 Jan 2019 08:58:47 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B415D2084C; Mon, 21 Jan 2019 13:58:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548079126; bh=6/x5wFDZavZaq5ZQsh17g8qJp4UW82s1VcttdSl5dZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=M85BG/DAqD/mrAbhzhU8WcTAFEVyy4qAT+b4LJrxgV4fSlYi1uqMBt3rJ5OPG3MSl +/5oSQ5ZpG3vc+OlP8nOgGt73iY/9TZ7vhSX+I+BZ1h8Qp13i1YTc7WeGpuTzEB2YQ M1BpEUhPCs2Q1ZteatLvmzLEgcpgWlBz5iSv7M9E= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Richard Henderson , Mark Rutland , Kristina Martsenko , Christoffer Dall , Catalin Marinas , Will Deacon , kvmarm@lists.cs.columbia.edu, Sasha Levin Subject: [PATCH 4.19 18/99] arm64/kvm: consistently handle host HCR_EL2 flags Date: Mon, 21 Jan 2019 14:48:10 +0100 Message-Id: <20190121134914.607528642@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190121134913.924726465@linuxfoundation.org> References: <20190121134913.924726465@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 4eaed6aa2c628101246bcabc91b203bfac1193f8 ] In KVM we define the configuration of HCR_EL2 for a VHE HOST in HCR_HOST_VHE_FLAGS, but we don't have a similar definition for the non-VHE host flags, and open-code HCR_RW. Further, in head.S we open-code the flags for VHE and non-VHE configurations. In future, we're going to want to configure more flags for the host, so lets add a HCR_HOST_NVHE_FLAGS defintion, and consistently use both HCR_HOST_VHE_FLAGS and HCR_HOST_NVHE_FLAGS in the kvm code and head.S. We now use mov_q to generate the HCR_EL2 value, as we use when configuring other registers in head.S. Reviewed-by: Marc Zyngier Reviewed-by: Richard Henderson Signed-off-by: Mark Rutland Signed-off-by: Kristina Martsenko Reviewed-by: Christoffer Dall Cc: Catalin Marinas Cc: Marc Zyngier Cc: Will Deacon Cc: kvmarm@lists.cs.columbia.edu Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/kernel/head.S | 5 ++--- arch/arm64/kvm/hyp/switch.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 95e3fa7ded8b..2297284e33f2 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -87,6 +87,7 @@ HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \ HCR_FMO | HCR_IMO) #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF) +#define HCR_HOST_NVHE_FLAGS (HCR_RW) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) /* TCR_EL2 Registers bits */ diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index b0853069702f..651a06b1980f 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -494,10 +494,9 @@ ENTRY(el2_setup) #endif /* Hyp configuration. */ - mov x0, #HCR_RW // 64-bit EL1 + mov_q x0, HCR_HOST_NVHE_FLAGS cbz x2, set_hcr - orr x0, x0, #HCR_TGE // Enable Host Extensions - orr x0, x0, #HCR_E2H + mov_q x0, HCR_HOST_VHE_FLAGS set_hcr: msr hcr_el2, x0 isb diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index ca46153d7915..a1c32c1f2267 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -157,7 +157,7 @@ static void __hyp_text __deactivate_traps_nvhe(void) mdcr_el2 |= MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT; write_sysreg(mdcr_el2, mdcr_el2); - write_sysreg(HCR_RW, hcr_el2); + write_sysreg(HCR_HOST_NVHE_FLAGS, hcr_el2); write_sysreg(CPTR_EL2_DEFAULT, cptr_el2); } -- 2.19.1