From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-186.mta0.migadu.com (out-186.mta0.migadu.com [91.218.175.186]) (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 C58DA261B93 for ; Fri, 12 Sep 2025 21:23:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.186 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757712208; cv=none; b=q5f04xeEghSuQnqumjUq2czIDFRTmZ1FFT2XMgK1RseEeifcsdrv2lSSXuAKKC2wlQqhOUnVoJ3L0Dr/gryAaAs8CaT6N2V9x4jVJdzHYiVGIndJ953KwZBytwwYhfRR32CbBewJu9uIcckOQbKTO3YesrW+Yupi4TLm/gKnm9k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757712208; c=relaxed/simple; bh=duOAsE1F0we66rNUjgKsYN+nYhTLU/RBitDpT11D05Q=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=uNPJe4mrn2s+DwnbqgN3tcgMeOyHPIaHZOC4rESaaddxohZZOOIuTjCcl2IVDvmN9gix1cwye4uuL717AI348a5GNZpTPy2W1s3S8FFMr8shSmkaaH2D2Mvz42PIyYKE4+nEBZiGHAYaH/UNyG0/cOS6XmWDoWUbp0zjzM0DCMk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=udyR42HG; arc=none smtp.client-ip=91.218.175.186 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="udyR42HG" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1757712205; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=0HJI9Hd+y91khFcUBdKPT0+mMzf9U2VpWNGGKiEeFuo=; b=udyR42HGoiVdwpLKCkh25nI5Lkur0K/I6QM4YmVxEz+UWQgXoY3eVDbh/JDlyDQU5kVaOp +/ly4nzb9gT2RPaI36UhI4ceOC2L69wR/Yb4fAESgfblYefCm7xLDSqYtV+bJk/G8pNy4X gnlBrxC//dpzb6R325w8eL803BsonhI= From: Oliver Upton To: kvmarm@lists.linux.dev Cc: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Jinqian Yang , Oliver Upton Subject: [PATCH 10/11] KVM: arm64: nv: Advertise FEAT_TIDCP1 to NV-enabled VMs Date: Fri, 12 Sep 2025 14:22:57 -0700 Message-Id: <20250912212258.407350-11-oliver.upton@linux.dev> In-Reply-To: <20250912212258.407350-1-oliver.upton@linux.dev> References: <20250912212258.407350-1-oliver.upton@linux.dev> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT While KVM does not expose IMPDEF features to VMs, FEAT_TIDCP1 is an architecturally-defined EL1 trap of a particular sysreg encoding range. Furthermore, KVM already advertises this feature to non-NV VMs. As there is no interaction with EL2 traps, expose the feature. Signed-off-by: Oliver Upton --- arch/arm64/kvm/nested.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index d3186f656d83..65b5fbb88510 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -1525,7 +1525,6 @@ u64 limit_nv_id_reg(struct kvm *kvm, u32 reg, u64 val) case SYS_ID_AA64MMFR1_EL1: val &= ~(ID_AA64MMFR1_EL1_CMOW | - ID_AA64MMFR1_EL1_TIDCP1 | ID_AA64MMFR1_EL1_nTLBPA | ID_AA64MMFR1_EL1_ETS | ID_AA64MMFR1_EL1_XNX | -- 2.39.5