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=-17.0 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 198FCC433E6 for ; Mon, 8 Feb 2021 10:09:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4F0864EAA for ; Mon, 8 Feb 2021 10:09:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232396AbhBHKIq (ORCPT ); Mon, 8 Feb 2021 05:08:46 -0500 Received: from mail.kernel.org ([198.145.29.99]:58420 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232086AbhBHKBO (ORCPT ); Mon, 8 Feb 2021 05:01:14 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (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 DDA1864E8A; Mon, 8 Feb 2021 09:57:57 +0000 (UTC) Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1l93Ip-00Ck14-K3; Mon, 08 Feb 2021 09:57:56 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org Cc: Catalin Marinas , Will Deacon , Mark Rutland , David Brazdil , Alexandru Elisei , Ard Biesheuvel , Jing Zhang , Ajay Patil , Prasad Sodagudi , Srinivas Ramana , Hector Martin , James Morse , Julien Thierry , Suzuki K Poulose , kernel-team@android.com Subject: [PATCH v7 07/23] arm64: Move VHE-specific SPE setup to mutate_to_vhe() Date: Mon, 8 Feb 2021 09:57:16 +0000 Message-Id: <20210208095732.3267263-8-maz@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210208095732.3267263-1-maz@kernel.org> References: <20210208095732.3267263-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, mark.rutland@arm.com, dbrazdil@google.com, alexandru.elisei@arm.com, ardb@kernel.org, jingzhangos@google.com, pajay@qti.qualcomm.com, psodagud@codeaurora.org, sramana@codeaurora.org, marcan@marcan.st, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There isn't much that a VHE kernel needs on top of whatever has been done for nVHE, so let's move the little we need to the VHE stub (the SPE setup), and drop the init_el2_state macro. No expected functional change. Signed-off-by: Marc Zyngier Acked-by: David Brazdil Acked-by: Catalin Marinas --- arch/arm64/kernel/hyp-stub.S | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kernel/hyp-stub.S b/arch/arm64/kernel/hyp-stub.S index 373ed2213e1d..6229315d533d 100644 --- a/arch/arm64/kernel/hyp-stub.S +++ b/arch/arm64/kernel/hyp-stub.S @@ -92,9 +92,6 @@ SYM_CODE_START_LOCAL(mutate_to_vhe) msr hcr_el2, x0 isb - // Doesn't do much on VHE, but still, worth a shot - init_el2_state vhe - // Use the EL1 allocated stack, per-cpu offset mrs x0, sp_el1 mov sp, x0 @@ -107,6 +104,11 @@ SYM_CODE_START_LOCAL(mutate_to_vhe) mrs_s x0, SYS_VBAR_EL12 msr vbar_el1, x0 + // Use EL2 translations for SPE and disable access from EL1 + mrs x0, mdcr_el2 + bic x0, x0, #(MDCR_EL2_E2PB_MASK << MDCR_EL2_E2PB_SHIFT) + msr mdcr_el2, x0 + // Transfer the MM state from EL1 to EL2 mrs_s x0, SYS_TCR_EL12 msr tcr_el1, x0 -- 2.29.2