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 37DA83538BF for ; Wed, 12 Nov 2025 18:34:13 +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=1762972453; cv=none; b=T80gi7SKO/EgnR0Q6pu5xh3Mjv9yMjuPQffdsv+dl2f8du+s7fFt7WqNooRR0cQIj1+Ny9ECWRyMXEAUXJk0vCp93W8qaTgUEujBwqhO/1mrsBvB5bnliXEOJqJuWe2g+a4gfUyK1ELF7Iz5o6rXE2VYGRNlbU69w+vxSFkUCL4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762972453; c=relaxed/simple; bh=AoYmfGcJUp5B9mI/GW58GpX5IuhJqktu2/eHnlVBJjs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mmZ0Fz+8JlLpzJPyz0DZRN1rqeoFn5IoJFCxI70ZkpuONWhdUSH0cPsVxLogPHgMDTh9413DDOzDxpsIaWqMsWx4pBF6tqq+ql4zpzTbbPH+uEfZlhAanlpjZmnn4yogjYC+NrzO7qpZSd9XCh7uQTbz57rYsnHRql+dQUWfR0c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=cL5EPN+w; 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="cL5EPN+w" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0483DC4CEF7; Wed, 12 Nov 2025 18:34:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762972453; bh=AoYmfGcJUp5B9mI/GW58GpX5IuhJqktu2/eHnlVBJjs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cL5EPN+wgPNcPWlcM6/SRegDK4nwB4WzFx3iUT6FkVP4VqLniOZaV6oSsXtQASG81 GiyqCa8KoDDnywKjIlvtduEg9f7o4xa+YKd4VUnlzV8jLnpbpElx7+igN/fZPedOMX QSCLOgujeNki1ay3Nf9RPiShtIYt/Rli4Qfk2NXm+FhgLKAsvqC0stTEIHmELftwkq wWcsIz2WcC/pNvdStPvYHTweAxIgAaarFrP11UgclcWy/Q70jPKd1mgfDkxkY+Czjm NWqisEFnVCdOTDLL7CNvZILRnH9Ey5JCed+LpqmOIOCAXRo/KtyLAhni9/qu2Wc8eU VJePpFc3feoUg== From: Oliver Upton To: kvmarm@lists.linux.dev Cc: Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Oliver Upton Subject: [PATCH 12/12] KVM: arm64: nv: Expose hardware access flag management to NV guests Date: Wed, 12 Nov 2025 10:34:06 -0800 Message-ID: <20251112183406.2118981-13-oupton@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251112183406.2118981-1-oupton@kernel.org> References: <20251112183406.2118981-1-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 7293769dacf5..2914fd20ad1f 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -1601,11 +1601,13 @@ 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