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 26046C433FE for ; Sun, 10 Oct 2021 14:56:56 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id A979A60F58 for ; Sun, 10 Oct 2021 14:56:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A979A60F58 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 5DB424B0E1; Sun, 10 Oct 2021 10:56:55 -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 s41yDZO29EGd; Sun, 10 Oct 2021 10:56:54 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 38AB24B118; Sun, 10 Oct 2021 10:56:54 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3C3C44B11C for ; Sun, 10 Oct 2021 10:56:53 -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 Q6Inee4co5Y5 for ; Sun, 10 Oct 2021 10:56:52 -0400 (EDT) Received: from mail-wr1-f73.google.com (mail-wr1-f73.google.com [209.85.221.73]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 58C314B0EC for ; Sun, 10 Oct 2021 10:56:52 -0400 (EDT) Received: by mail-wr1-f73.google.com with SMTP id h11-20020adfa4cb000000b00160c791a550so10993609wrb.6 for ; Sun, 10 Oct 2021 07:56:52 -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=VhuTEAoXz/dF/jFcm1SrjIjX6UWTaTkDztAyYYvfOi8=; b=qWI4G5g36XxXyEsgPjeNAI4W97txYnCt+D1vMKXxad2mu+zc9lDk69KVLbgb7MoKDY x4b65PqwGCwM5iC6D0Z8c+mqJ60ImWNqWz8ID4P27GoBikiJflNd6oskhEdJ7dCX/hjI r+eIfx4aFm0iit0UHZ1DV0uMo5OrQJNk2zDrucrBYWGDZ6RYQmXK5Z40NpPTgxZskO6K pI6ppf5RTnHu6yfBd0HWnDKOgxR11KaPNl6p+wLJeOCUcCJNU+sLsfxkKgnH/Tpedtd+ GWyavAG0HDOHpRkTCDF0//3M/NyzLOZjlUL7XEyP9lxtvKi0dz+HLHueq6d9gvPdHdNS jLAw== 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=VhuTEAoXz/dF/jFcm1SrjIjX6UWTaTkDztAyYYvfOi8=; b=yLm5KvOQvYOcRAk1nYsXHHtgKyLNhO/LTPJPr8UGH+qeIxcUErEyg7zMLz9TkRFgkG drIJXjAfRi2jLxM1NVEuxxK8xeWL1Yc2HfTfWf0hWObaLVGOI6UDOi5CaXkiVP7WdO9U JSBR/9AEuO3XU4357ML0JkCZuA34EGSmMgq0eamZaZCisUV6+Cupg0WiIu6fQ8MYxxdU J+ME04Q217aQfNQLlY2pjvwXhdn85o4EhvXXzYZNhfER0dSDI+WvW1S1nze+ke7G0jbW t7Y0VJU1WDg49z1itlh/Ols/EsTH4a7AJUVw7TwT8ox1tNUAVT3gzsMMg9KzWM0h6Y20 RU4Q== X-Gm-Message-State: AOAM530t3PHVv3L9FNyzFIJbvcDQx9uVDasTC6D3PFcxT62Em8bpuNUP uWwRQP48jpAJFbQ94jleAbrBREaNiRusxM381Tq1JqPa0i2H6PjAo6mwlFUK7wN4PazRHeN3zWP 4D21HTEYGFBMcs9oYllXphrD/pz4gR2WK0X57kM3r6TALSZgo3Z3KPy7OE1+pwApviP8= X-Google-Smtp-Source: ABdhPJz9fEWzeoXAkJy2EB0zc/fuvxlPm1VqHcpI+f8um4/Z2ygNhevMtDfldGJvxH5VKZYVvAdv4s5YJw== X-Received: from tabba.c.googlers.com ([fda3:e722:ac3:cc00:28:9cb1:c0a8:482]) (user=tabba job=sendgmr) by 2002:a05:600c:4e88:: with SMTP id f8mr4351133wmq.185.1633877811342; Sun, 10 Oct 2021 07:56:51 -0700 (PDT) Date: Sun, 10 Oct 2021 15:56:31 +0100 In-Reply-To: <20211010145636.1950948-1-tabba@google.com> Message-Id: <20211010145636.1950948-7-tabba@google.com> Mime-Version: 1.0 References: <20211010145636.1950948-1-tabba@google.com> X-Mailer: git-send-email 2.33.0.882.g93a45727a2-goog Subject: [PATCH v8 06/11] KVM: arm64: Simplify masking out MTE in feature id reg From: Fuad Tabba To: kvmarm@lists.cs.columbia.edu Cc: kernel-team@android.com, kvm@vger.kernel.org, maz@kernel.org, pbonzini@redhat.com, will@kernel.org, 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 Simplify code for hiding MTE support in feature id register when MTE is not enabled/supported by KVM. No functional change intended. Signed-off-by: Fuad Tabba Reviewed-by: Andrew Jones --- arch/arm64/kvm/sys_regs.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 1d46e185f31e..447acce9ca84 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1077,14 +1077,8 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu, val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_CSV3), (u64)vcpu->kvm->arch.pfr0_csv3); break; case SYS_ID_AA64PFR1_EL1: - val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_MTE); - if (kvm_has_mte(vcpu->kvm)) { - u64 pfr, mte; - - pfr = read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1); - mte = cpuid_feature_extract_unsigned_field(pfr, ID_AA64PFR1_MTE_SHIFT); - val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR1_MTE), mte); - } + if (!kvm_has_mte(vcpu->kvm)) + val &= ~ARM64_FEATURE_MASK(ID_AA64PFR1_MTE); break; case SYS_ID_AA64ISAR1_EL1: if (!vcpu_has_ptrauth(vcpu)) -- 2.33.0.882.g93a45727a2-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm