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 82D8E35F167 for ; Wed, 1 Apr 2026 17:00:23 +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=1775062823; cv=none; b=JDfdjwYoCw7TF3Qqw+Qr11NDeDHBJdESr7VLS7YoCw9XLUzCGMuQRe0tC2RY/xaEX6h4E3e0ynYp2bnn/zgn5Kv1AHXL18XmkcPSxK6kUAr0GvO9+DalG2UApruDqLCuJPFB8UE0RO8LglZs8SQvEhcpD7c4HOy/UWacXcewfGo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775062823; c=relaxed/simple; bh=YiVdKnvqD5vCATf23tC4OrdiTH65zsHAKoYXAEDSv9g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=l7cdP1+4WwY0TmQdTg7TvUWEhI38umQ12NfEdfuYnN90Otts6dQ9HZ9w8+v4HFpNhUE5EYC6r83cs64GCXRzHc7UHj0gCbVVgPQJw+S+rJVdS9XMDFn1/mcJjox99/xnS7YWAhOIgjRnk8H8HynnOsQAtOvMNlJ0QWp7F9BVkL0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mcIps+yd; 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="mcIps+yd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 19595C4CEF7; Wed, 1 Apr 2026 17:00:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775062823; bh=YiVdKnvqD5vCATf23tC4OrdiTH65zsHAKoYXAEDSv9g=; h=From:To:Cc:Subject:Date:From; b=mcIps+ydayXq3ikkHk6pOXKdzfdMX6ggx/tE9jWoMxYqiBrTHMlVKytOBQQTw7JmE biVbkmQBpVZFvLg5fBr5J9VZbylIneI96ebwUgvhay3eyMOd585dt58hu0Du8wbX+I fKtLTceSMPOQQKJXBOQNGXCtN1TUCYKrQZi+uFlB80H1YiqjI1DlJb4u3mzSn2tOgG R3LwUAqqi1zRJMCDdpGyoTJWzQjDS2mPULD24gotWUivxlZgUcHYm8SanAiK/uy+Ud JfoAjW/jlYRrb56ArSes4cV6ubBJ2uZ/L1H+Mre7QzKJl4lE7AXk648xYmOMcUe8ne TUr/8pKFpqoOA== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1w7yvU-00000007xNF-39m5; Wed, 01 Apr 2026 17:00:20 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Sascha Bischoff , Will Deacon , Catalin Marinas Subject: [PATCH] KVM: arm64: Advertise ID_AA64PFR2_EL1.GCIE Date: Wed, 1 Apr 2026 18:00:17 +0100 Message-ID: <20260401170017.369529-1-maz@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, sascha.bischoff@arm.com, will@kernel.org, catalin.marinas@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false As we are missing ID_AA64PFR2_EL1.GCIE from the kernel feature set, userspace cannot write ID_AA64PFR2_EL1 with GCIE set, even if we are on a GICv5 host. Add the required field description. Signed-off-by: Marc Zyngier --- arch/arm64/kernel/cpufeature.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 32c2dbcc0c641..5bca6e064ca72 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -327,6 +327,7 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr2[] = { ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_FPMR_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_MTEFAR_SHIFT, 4, ID_AA64PFR2_EL1_MTEFAR_NI), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_MTESTOREONLY_SHIFT, 4, ID_AA64PFR2_EL1_MTESTOREONLY_NI), + ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_GCIE_SHIFT, 4, ID_AA64PFR2_EL1_GCIE_NI), ARM64_FTR_END, }; -- 2.47.3