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 AC92A33A6F9; Wed, 26 Nov 2025 16:00:01 +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=1764172801; cv=none; b=Dn2LRbMh21bFqr0J8+QnWSUMQFEjPhUcL7Q31QWBGIOimz+r14B8J/vIzj1yDl7BAB1MkQ7e0+1lbZ2L3k6GBhRfVf478TJYZUykTcRDqjheu/69EafoAUzRMOVtErsfHvhFAgnnNnNFxOtFs/K8ypOCKRmhQuue/GlER4xKtTY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764172801; c=relaxed/simple; bh=YsSPAktGKZYpXd8EVw1BHlsLN0IZwUebr/zgLah6+nE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pS6LytwpeWIwBsSw1Yyi28FhcvQf593QilCiN65P5ysdlVqSbyv5SwhJS7egzUFfNwNBmWBMxGb1p6A4Pl87/Oi6PqM090BQBsGNH8/KxUsazEYbHjjc/OApMeASaL6hYrrZRDiy3QhP4H9W59T9QMCpdNXzf/6l0SRG8ktrIco= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=g2D0JL3B; 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="g2D0JL3B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5A7EDC113D0; Wed, 26 Nov 2025 16:00:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764172801; bh=YsSPAktGKZYpXd8EVw1BHlsLN0IZwUebr/zgLah6+nE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g2D0JL3BFjCgtgX99vdIBdJ2Oz8zNFHFv69lCQpzDe5Mxaait38yB0zY2ennXWNT3 L9s5Ozp4f5mKv1ot00McCJO55GNAdmJJv5el3cH6r6ufqkLha91oDhXc3g5vnMNnlc /8/SYPXwEXN16QXX8JrVoBRCrn7EOjxYjkPeWYrvIDvgLTFl3Qn17WxW54QQQwA9GZ 9UjYSedfusetQrlURn4mt+CloQx+tr9aG2CpMU9fJC6Pqd1LPxBg+WzD+ZnR2FaK8J dUESFQLk8ZBTZ4BmxfzIDvTDt6Hp07i30il5WzP26xJOiDJO3RqtRJbMz2pMqQTRSw rNpw6Joa2urtA== 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 1vOHvy-00000008WrH-3H3A; Wed, 26 Nov 2025 15:59:58 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Ben Horgan Subject: [PATCH v2 2/5] KVM: arm64: Force trap of GMID_EL1 when the guest doesn't have MTE Date: Wed, 26 Nov 2025 15:59:48 +0000 Message-ID: <20251126155951.1146317-3-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251126155951.1146317-1-maz@kernel.org> References: <20251126155951.1146317-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org 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, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, ben.horgan@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false If our host has MTE, but the guest doesn't, make sure we set HCR_EL2.TID5 to force GMID_EL1 being trapped. Reviewed-by: Joey Gouly Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 9e4c46fbfd802..2ca6862e935b5 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -5561,6 +5561,8 @@ static void vcpu_set_hcr(struct kvm_vcpu *vcpu) if (kvm_has_mte(vcpu->kvm)) vcpu->arch.hcr_el2 |= HCR_ATA; + else if (id_aa64pfr1_mte(read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1))) + vcpu->arch.hcr_el2 |= HCR_TID5; /* * In the absence of FGT, we cannot independently trap TLBI -- 2.47.3