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 8257233C181; Thu, 20 Nov 2025 13:32:20 +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=1763645540; cv=none; b=FdZydYq1Wd+d8/mxDUELz+sheV1W5LVtimWnXaAwz6tsLCRQ1iKhJEOOAWfSGOShsv76n7TrcPDRNY6+UeQ5LbaSs8ZrPSltiMw+XzkCmNVJUXEC/0dvww1Xtlo8jd/bIihnhOlXgrzOp3IYx1SO9SJiXl+ZLpSzIeBEV9niMdk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763645540; c=relaxed/simple; bh=b2L49jfqGv4rJQF7Nj77KE4YqTNOsdlKLv3vMtsROlg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SM5fq8tZqwc4ARe1Lec6TLUF6KZ3+WZwzlO8Ok9mtRn4a5COgOUYJYxWoFw8KLLM45JLSl/ln8yOgbnWbfSnhr9avKoQXqrllEkPjlm2arpaPYYa7txfIwgDvpBvVIM3mjoslPpkiwpZv9aoDeTA0KZrUi0rGY1qDxd9VtLMf+c= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p8BSLByV; 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="p8BSLByV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3FA0EC16AAE; Thu, 20 Nov 2025 13:32:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763645540; bh=b2L49jfqGv4rJQF7Nj77KE4YqTNOsdlKLv3vMtsROlg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=p8BSLByVUD3MU8KJdONAL/52a2W5AKt8Fe3bxtJBNoUX8WZbH3LbTeiT5uw/+nYwd IhLc5S44IdJwpVDSuPiil+u8R3wqIvLwGZZrEFGgfTz6jO7kbS3co9gxFa8aPIOUAz dRbULX72ahYLqSYjEKzipM8E8CozhwG8oY4tcrNZrhYEZcENjgvjqQQwj17C+wSHGk skD5E+Af0s2Hf8Yq+2YRwFpmiMS5NFeMz5hz3Gi7OkMqSQz0K0vNHQqQ3Fpkq6WzjO VaZO+ZwmKrdGnUbIYMTFoanIZaK8hvgIcK2P4T+JUitE0VpQ8m6CDOtErZsfgSMoy9 KwXR5BR5lzOkQ== 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 1vM4lm-00000006tUG-0kH8; Thu, 20 Nov 2025 13:32:18 +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 Subject: [PATCH 2/5] KVM: arm64: Force trap of GMID_EL1 when the guest doesn't have MTE Date: Thu, 20 Nov 2025 13:31:59 +0000 Message-ID: <20251120133202.2037803-3-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251120133202.2037803-1-maz@kernel.org> References: <20251120133202.2037803-1-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 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. 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 84e6f04220589..40f32b017f107 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -5558,6 +5558,8 @@ 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