From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 060AE324B22 for ; Mon, 17 Nov 2025 22:43:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763419415; cv=none; b=mB3IXpwg0D44t0aQoqfpcG2u3Hd7L5gD0nt+MiwHtg5GB8xBskFMD4eu0dvlsbFePrgXLx0UjejMaARnxSAFGzCmZrTrSFzMZkJ9oBU0NDnFT69WYlx1lMtkkiWmb4tY2ZAOAPlieZZIvcoYqJayGBOF0CmRuL9Hlj6d3Nq6mAU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763419415; c=relaxed/simple; bh=JkPZ4r0bcsp+Er9TnUJQEeAzrNHw96bBA6KDxB60I7c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Gv2H0KVsOUYt8LR4GoVhJkYQwDPpvR1p0kRTkJizUgGusZGSQcgfEJ+2a6Gfp5TgB0+5MvU2szd9hZty108rXL/DwX/x37U1ZMmhIk9WyW2Kei6Xk688n5moP1YjAVUcV2QiB3rO7k/61cXcsMHrU2Z+a9t2S4rEv1NkC6GwKzE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VrQ9Jx9o; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VrQ9Jx9o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5F71BC2BCB1; Mon, 17 Nov 2025 22:43:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763419414; bh=JkPZ4r0bcsp+Er9TnUJQEeAzrNHw96bBA6KDxB60I7c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VrQ9Jx9oOJVoL7HrXQlzD9QFWgBkSkEeL1sV/R5KxCteQZb2xnunSyN0BuKnMnoLu L0IpSi/jEWajT03sbzhN5o4kX88GOfvSzsKBNs0wqXA50rUEbK4dBJ8dxyQLxeM4u4 +a94KzKSdKs1/51RjPampeKesbkQVsXpQeYi/IXZSbO4XucrGcLLA53Adb3T4d4vHr adfsMHaMsaLFNOHp/+/+NLdD8/PiB4Hfp0VlqA+zovvo0QEQWRoq9/hNNxW/zyV54l +zG+gSbn0CoCK36EUJOj942DPMigFQCV3iXJ0eWiRQodepNVjtdeAJ3mspgN4sEL3P VJP9fnHXLv8pA== From: Oliver Upton To: kvmarm@lists.linux.dev Cc: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Oliver Upton Subject: [PATCH v2 13/14] KVM: arm64: nv: Expose hardware access flag management to NV guests Date: Mon, 17 Nov 2025 14:43:24 -0800 Message-ID: <20251117224325.2431848-14-oupton@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251117224325.2431848-1-oupton@kernel.org> References: <20251117224325.2431848-1-oupton@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Everything is in place to update the access flag at S1 and S2. Expose support for the access flag flavor of FEAT_HAFDBS to NV guests. Signed-off-by: Oliver Upton --- arch/arm64/kvm/nested.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index 5921b66279b8..dbd3900e8bff 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -1603,11 +1603,13 @@ 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_nTLBPA | - ID_AA64MMFR1_EL1_ETS | - ID_AA64MMFR1_EL1_HAFDBS); + ID_AA64MMFR1_EL1_ETS); + /* FEAT_E2H0 implies no VHE */ if (test_bit(KVM_ARM_VCPU_HAS_EL2_E2H0, kvm->arch.vcpu_features)) val &= ~ID_AA64MMFR1_EL1_VH; + + val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64MMFR1_EL1, HAFDBS, AF); break; case SYS_ID_AA64MMFR2_EL1: -- 2.47.3