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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E1D3CC433EF for ; Tue, 12 Oct 2021 04:36:55 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 9825A610A3 for ; Tue, 12 Oct 2021 04:36:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9825A610A3 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 48F644B125; Tue, 12 Oct 2021 00:36:55 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8fU7AgBaBJU9; Tue, 12 Oct 2021 00:36:54 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 22DBD4B135; Tue, 12 Oct 2021 00:36:54 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 84BB94B13D for ; Tue, 12 Oct 2021 00:36:51 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id aEZOj4XHqTPX for ; Tue, 12 Oct 2021 00:36:50 -0400 (EDT) Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id A50EB4B0BF for ; Tue, 12 Oct 2021 00:36:50 -0400 (EDT) Received: by mail-yb1-f202.google.com with SMTP id c65-20020a251c44000000b005ba81fe4944so15732084ybc.14 for ; Mon, 11 Oct 2021 21:36:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=coUrbvM5Lflty8spiztbsAsv+oJSc+F2TzdUPHTvF9k=; b=Ej/iKb8rhpuAFcFhtUeJxd6vSSdkQ2BxL4TjlXKczR/6dr5X6ci0KopMAWsHDKOqjv okJL8Sppbfs3inGm9cGEmEYOuaQpNVgtJFpM7j8m66AwkUwYxOU1sjQ443h6XFSBJmMK v5b7RbvmeJRv4kOx4BcVMQ3hiBWnsJ7CuryfbV04C0oCi80aONDVPBeImSrVKgXQCb0d FB9No1u+1RpUHV6C7uwVmJPr1oYspLsYn6DzWVKGUDNNQ2badK3vWNggpGelXEpMFnF+ IH06c42XNyHc9Mbeg+uit5VZ7HA0CiQyecbm7ta0nasgP0t0rBUVAX5EePI+t7TMCE+t QqnA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=coUrbvM5Lflty8spiztbsAsv+oJSc+F2TzdUPHTvF9k=; b=1pWiERL3GHbgR9R4EK4sM/G9y+qprfWWV6l94O3qLaDb+YbtJwOcZQmznBxXi0cObn XL/3fSwT73GLrQZGtXOTLEqXL+il3/JHy1WHDOqvTmaIHyD5m3dJwP5FGYc/YyULl5EL HaJ3pWFsow+4QFdMqtoPvqH0Em2cOqw+0a9uEQCrz/bIRJ8KhIypyQ/a26hikaQFzqDk UvyZNnR159fib6I53mh/EtTCkeuSGIUGweavh+3idgfucWKbF3qw/l5J0E4SuCh33knQ /md6WUYdP/YrFvT5xSYYGRRYvOD1DqhGvd6rdBapNMMWkd7s6hsLU7kxQcgk/Jvm3ZYL H25w== X-Gm-Message-State: AOAM532MYTMvpPmPUYmzWMq2VLM7tvALjzQsZ3mVqEZHIeF02Ga/wWIt XM/+tjTURFAHMM73PhaK5ifzQErTm0I= X-Google-Smtp-Source: ABdhPJwPvi/lmgC+gTZ21/Wz66CiGZojJBK5kwnJiiX4LQSzHxbRpLQV3my0CP726mGMYzFbz6D93vOC+Rk= X-Received: from reiji-vws.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:15a3]) (user=reijiw job=sendgmr) by 2002:a25:1c45:: with SMTP id c66mr27703481ybc.133.1634013410276; Mon, 11 Oct 2021 21:36:50 -0700 (PDT) Date: Mon, 11 Oct 2021 21:35:30 -0700 In-Reply-To: <20211012043535.500493-1-reijiw@google.com> Message-Id: <20211012043535.500493-21-reijiw@google.com> Mime-Version: 1.0 References: <20211012043535.500493-1-reijiw@google.com> X-Mailer: git-send-email 2.33.0.882.g93a45727a2-goog Subject: [RFC PATCH 20/25] KVM: arm64: Trap disabled features of ID_AA64PFR1_EL1 From: Reiji Watanabe To: Marc Zyngier , kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, Will Deacon , Peter Shier , Paolo Bonzini , linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add feature_config_ctrl for MTE, which is indicated in ID_AA64PFR1_EL1, to program configuration register to trap the guest's using the feature when it is not exposed to the guest. Signed-off-by: Reiji Watanabe --- arch/arm64/kvm/sys_regs.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 2b45db310151..595ab1c79bae 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -331,6 +331,17 @@ static struct feature_config_ctrl ftr_ctrl_amu = { .cfg_val = CPTR_EL2_TAM, }; +/* For ID_AA64PFR1_EL1 */ +static struct feature_config_ctrl ftr_ctrl_mte = { + .ftr_reg = SYS_ID_AA64PFR1_EL1, + .ftr_shift = ID_AA64PFR1_MTE_SHIFT, + .ftr_min = ID_AA64PFR1_MTE_EL0, + .ftr_signed = FTR_UNSIGNED, + .cfg_reg = VCPU_HCR_EL2, + .cfg_mask = (HCR_TID5 | HCR_DCT | HCR_ATA), + .cfg_val = HCR_TID5, +}; + struct id_reg_info { u32 sys_reg; /* Register ID */ u64 sys_val; /* Sanitized system value */ @@ -693,6 +704,10 @@ static struct id_reg_info id_aa64pfr1_el1_info = { .init = init_id_aa64pfr1_el1_info, .validate = validate_id_aa64pfr1_el1, .get_reset_val = get_reset_id_aa64pfr1_el1, + .trap_features = &(const struct feature_config_ctrl *[]) { + &ftr_ctrl_mte, + NULL, + }, }; static struct id_reg_info id_aa64isar0_el1_info = { -- 2.33.0.882.g93a45727a2-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm