From patchwork Fri May 26 14:33:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13257005 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3136DC7EE23 for ; Fri, 26 May 2023 14:36:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243227AbjEZOgW (ORCPT ); Fri, 26 May 2023 10:36:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237375AbjEZOgV (ORCPT ); Fri, 26 May 2023 10:36:21 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F4B2E49 for ; Fri, 26 May 2023 07:36:01 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 6485D65073 for ; Fri, 26 May 2023 14:33:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 30ED7C433EF; Fri, 26 May 2023 14:33:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1685111635; bh=PWi6LY8XpJQzudXyIWXRXdjw/fgswuqZz0wPMwkGK68=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bODysDYCEpcWSSgue4rUMETsDImAbhG746gjq9mdCFw+TnPmfJlvE+SmMOW26Npwf PKhPRlFvmbN4Usc5ugce7JvehcxxghF9VUnSx/ykwJRXrlQvBDeDkboR+uqCeZd12K m6eubfQ9WY3xho3CAP/j49PTx6cwLNS9e7IWuJ3KfxfIsm1xPZUXNyvt9+buaOeDV6 HtTk/JOmcmYKQYPM4VQY0EFTkC9F70aK7qugfrCSsrWTa1HtVvJVndawW6GXRFpHtg +3u8tqUwNbYPE2ybB0VZXd7pDiBKzjDJGAlbn0/dgLwgx6DxvVPmB+RWByQdcKN6Ia m0XA+gaMelF8Q== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1q2YVt-000aHS-1A; Fri, 26 May 2023 15:33:53 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Quentin Perret , Will Deacon , Fuad Tabba Subject: [PATCH v2 07/17] arm64: Use CPACR_EL1 format to set CPTR_EL2 when E2H is set Date: Fri, 26 May 2023 15:33:38 +0100 Message-Id: <20230526143348.4072074-8-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230526143348.4072074-1-maz@kernel.org> References: <20230526143348.4072074-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, qperret@google.com, will@kernel.org, tabba@google.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: kvm@vger.kernel.org When HCR_EL2.E2H is set, the CPTR_EL2 register takes the CPACR_EL1 format. Yes, this is good fun. Hack the bits of startup code that assume E2H=0 while setting up CPTR_EL2 to make them grok the CPTR_EL1 format. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/el2_setup.h | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h index 225bf1f2514d..bba508ffa12d 100644 --- a/arch/arm64/include/asm/el2_setup.h +++ b/arch/arm64/include/asm/el2_setup.h @@ -129,8 +129,15 @@ .endm /* Coprocessor traps */ -.macro __init_el2_nvhe_cptr +.macro __init_el2_cptr + mrs x1, hcr_el2 + and x1, x1, #HCR_E2H + cbz x1, .LnVHE_\@ + mov x0, #(CPACR_EL1_FPEN_EL1EN | CPACR_EL1_FPEN_EL0EN) + b .Lset_cptr_\@ +.LnVHE_\@: mov x0, #0x33ff +.Lset_cptr_\@: msr cptr_el2, x0 // Disable copro. traps to EL2 .endm @@ -196,7 +203,7 @@ __init_el2_gicv3 __init_el2_hstr __init_el2_nvhe_idregs - __init_el2_nvhe_cptr + __init_el2_cptr __init_el2_fgt __init_el2_nvhe_prepare_eret .endm @@ -244,7 +251,17 @@ .Linit_sve_\@: /* SVE register access */ mrs x0, cptr_el2 // Disable SVE traps + mrs x1, hcr_el2 + and x1, x1, #HCR_E2H + cbz x1, .Lcptr_nvhe_\@ + + // VHE case + orr x0, x0, #(CPACR_EL1_ZEN_EL1EN | CPACR_EL1_ZEN_EL0EN) + b .Lset_cptr_\@ + +.Lcptr_nvhe_\@: // nVHE case bic x0, x0, #CPTR_EL2_TZ +.Lset_cptr_\@: msr cptr_el2, x0 isb mov x1, #ZCR_ELx_LEN_MASK // SVE: Enable full vector