From nobody Fri Oct 3 02:17:19 2025 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DEBB27602B for ; Tue, 9 Sep 2025 03:44:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389463; cv=none; b=KS8Sq86uQYB914ZanUTTu45uiO1CVRDOVjhUMNUnScjcqFUmqkVqPie8L9ZK+GyNgh7mLNiny39RAduLusf6Kb8a51qyIeXprylims+fdLOnnJAnY3ozOQRys4yCK9jKgkWvvX0WUf3h3GtRb2OAioYC8oYPvT4BAPyn2hFeoI8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757389463; c=relaxed/simple; bh=4XatZ2Ym4v/LaAB5X+n8cxr2bSXfDlHMdqOgB4bcOKs=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=MZL7o6HY4hg8avC3OBKuwy0K7KmrP5o/SWXmYliwZIQCcJO46a0ORO+v/EEWFlQuBu6c8rwYt7/lqDYjHUjdZ/mAFNKPhpz1Iqt8foWwjXP3I61QwNt/w1NAwnHFQSe6YaHLUQJLeG1QCr+E/Whgwqw8jyFQ1UnoF6chP6rv2lA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.190 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.162.112]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4cLV1w1DVHz2CgJG; Tue, 9 Sep 2025 11:39:48 +0800 (CST) Received: from dggpemf500013.china.huawei.com (unknown [7.185.36.188]) by mail.maildlp.com (Postfix) with ESMTPS id CD39814013B; Tue, 9 Sep 2025 11:44:19 +0800 (CST) Received: from huawei.com (10.50.165.33) by dggpemf500013.china.huawei.com (7.185.36.188) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Tue, 9 Sep 2025 11:44:19 +0800 From: Jinqian Yang To: , , CC: , , , , , Subject: [PATCH v2 3/3] KVM: arm64: Make ID_AA64MMFR1_EL1.VH writable from userspace Date: Tue, 9 Sep 2025 11:44:15 +0800 Message-ID: <20250909034415.3822478-4-yangjinqian1@huawei.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20250909034415.3822478-1-yangjinqian1@huawei.com> References: <20250909034415.3822478-1-yangjinqian1@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: kwepems500002.china.huawei.com (7.221.188.17) To dggpemf500013.china.huawei.com (7.185.36.188) Content-Type: text/plain; charset="utf-8" Allow userspace to downgrade VH in ID_AA64MMFR1_EL1. Userspace can only change this value from high to low. Signed-off-by: Jinqian Yang --- arch/arm64/kvm/sys_regs.c | 1 - tools/testing/selftests/kvm/arm64/set_id_regs.c | 1 + 2 files changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index db49beb8804e..5ff14c7ec753 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3003,7 +3003,6 @@ static const struct sys_reg_desc sys_reg_descs[] =3D { ID_AA64MMFR0_EL1_ASIDBITS)), ID_WRITABLE(ID_AA64MMFR1_EL1, ~(ID_AA64MMFR1_EL1_RES0 | ID_AA64MMFR1_EL1_XNX | - ID_AA64MMFR1_EL1_VH | ID_AA64MMFR1_EL1_VMIDBits)), ID_FILTERED(ID_AA64MMFR2_EL1, id_aa64mmfr2_el1, ~(ID_AA64MMFR2_EL1_RES0 | diff --git a/tools/testing/selftests/kvm/arm64/set_id_regs.c b/tools/testin= g/selftests/kvm/arm64/set_id_regs.c index a889550d8aa4..00dd8066b46f 100644 --- a/tools/testing/selftests/kvm/arm64/set_id_regs.c +++ b/tools/testing/selftests/kvm/arm64/set_id_regs.c @@ -172,6 +172,7 @@ static const struct reg_ftr_bits ftr_id_aa64mmfr1_el1[]= =3D { REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, PAN, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, LO, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, HPDS, 0), + REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, VH, 0), REG_FTR_BITS(FTR_LOWER_SAFE, ID_AA64MMFR1_EL1, HAFDBS, 0), REG_FTR_END, }; --=20 2.33.0