From nobody Tue Feb 10 04:16:23 2026 Received: from out-176.mta0.migadu.com (out-176.mta0.migadu.com [91.218.175.176]) (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 1BE1625742A for ; Mon, 10 Feb 2025 19:40:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739216431; cv=none; b=RzdC7G6d+5QLuO1Cn0m/A6lJXgSqKwLgk6CfkHxb43EJfm9/ZYYyz9+edWtvkFOpIxwYTdDVjaLIaEtIRatXcaZyYE6s+UPS3Q3zvAkUd/hhMx+lHO87ePA2F/tfKRdyeLeVWzDLBpdkXR78/0zyt27jYbxBBxGj9bKA3gAZ4o4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739216431; c=relaxed/simple; bh=Q2X3fPKVvdzr1B3hHwj4E/4Mk7pqhs1UeDt0uJfgsNE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ir0IZxg8Ej0/LH3xj65l8hwOldM319RRAJkrNcHdEBgVg8xGqvCMAzIXyFKlJ3utSX6To6oHN5mDR9dFq0uR04hesUW/uJgGz1ky6BrFwkvu1C4XCzzPDXbxKLJlxVTYfNM9nIS8s6/FdJOkRN2Gdvfzu6NlDwq1KX/Bj241JZ0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=rosenzweig.io; spf=pass smtp.mailfrom=rosenzweig.io; dkim=pass (2048-bit key) header.d=rosenzweig.io header.i=@rosenzweig.io header.b=d9bfjWKu; arc=none smtp.client-ip=91.218.175.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=rosenzweig.io Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rosenzweig.io Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rosenzweig.io header.i=@rosenzweig.io header.b="d9bfjWKu" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=rosenzweig.io; s=key1; t=1739216426; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Occ2Auitkp4TNvTqlmdDCEbjvoCr3RaS62RKSPjLibw=; b=d9bfjWKuGE6S10cVSNw9w48WqXMUZBcGuoaR9zleSEB3XvbuAzC4YlbGcc2ewqroMo5mca elLQz7k9lFnDVTTaiyq7QJnP1epkIm6bLx/+8tHS1MbY+FzPSCi6D7CeXDEAktN3z6MLik damm9V/imb6ZqferHa0FWI/tlbvfpYFb13iC8CpOjlQyuayo04qb3V5X50TGnXAtd8lT32 P7DfX8rVNnOgAH7LdRYMxKMxg5azLSvPtJoCumZ8L8D2xNTHcUJ+oRSKbPe7L5BGHHig8S 5wLVjx41NtZC+lhECott69vlwiFAmIU+oscASzZq5MnIg1rkiS0DxY+xXrQB1Q== From: Alyssa Rosenzweig Date: Mon, 10 Feb 2025 14:39:56 -0500 Subject: [PATCH 4/5] iommu/dart: Reject identity domain for locked DARTs Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250210-locked-dart-v1-4-5d97fe247f35@rosenzweig.io> References: <20250210-locked-dart-v1-0-5d97fe247f35@rosenzweig.io> In-Reply-To: <20250210-locked-dart-v1-0-5d97fe247f35@rosenzweig.io> To: Sven Peter , Janne Grunau , Joerg Roedel , Will Deacon , Robin Murphy Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Alyssa Rosenzweig X-Developer-Signature: v=1; a=openpgp-sha256; l=781; i=alyssa@rosenzweig.io; h=from:subject:message-id; bh=Q2X3fPKVvdzr1B3hHwj4E/4Mk7pqhs1UeDt0uJfgsNE=; b=owEBbQKS/ZANAwAIAf7+UFoK9VgNAcsmYgBnqlYZblhzlpiuLR3xbq+t6xWjNWkzODbgWUFF5 Fs8N4cPjwOJAjMEAAEIAB0WIQRDXuCbsK8A0B2q9jj+/lBaCvVYDQUCZ6pWGQAKCRD+/lBaCvVY DfbXD/9R9X6kCnXTZvOwa5wliwk7U6TDTvgktXgigweVT9oIXCaiqPqOzuaP147ASN3CDzU+Hym HkKienPTMPBI8OUUsO7EH/fC9njHeIxIht6fiz1MHV23cmySLs9fgevS0rXk6+JMjQDWviAhbA6 en0KYZA0ZEe7VRGlgqGZKDhMmwtbOp9QQMOkvNC6UKxQymcwaipOSuG8JZNIDtt5PJZt8zglc6P Bst0ZY4KogoLg5lXWoirtipWmtjE6LXFB27ggVATt6OxOTbSp/bgghq9pU7gMlpjtneOQe+BmH4 KV8FGp6Bsipd11gUJPx+qVLWBc6pTmLmkiJsR4Q4Yt2gDmJC5DEnpX6BB4Zh0Y1lLNQyIvqHOq/ tFangOvZ2w5JR7pbSNFLVo5A/7Sn3KRT6LZjC8oS5P3WvPTs+v4thCPjx07G9vKLTngzUI+ao2r B/L8n1NOusN93T1127AGB/+n+hPeEVxX7xv7rP4xgkpfNMAHqPKjOHFhBwheOBQ25T2e/PJx462 I2qkNPtIHvCvsJIF5fPaf4HObzeY+quJp7eiGXkqHyQwGvbO3H2CX9dRJkgpjtNLYWUv0Sp0TIg OffyZwpGvQHldBCXuxjpnYA1vJP3LVFDf8VSR+O4qpSVoL/IbjYG5gFp1RbbsNPV66svskh0aB8 mmyCRBY9jh67snQ== X-Developer-Key: i=alyssa@rosenzweig.io; a=openpgp; fpr=435EE09BB0AF00D01DAAF638FEFE505A0AF5580D X-Migadu-Flow: FLOW_OUT This cannot work. Signed-off-by: Alyssa Rosenzweig Signed-off-by: Janne Grunau --- drivers/iommu/apple-dart.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c index 9c6f780dc7220096ed6bba692fa1a4bd859b0d61..29b627b38e8c37afd2b6a72865f= 43d24b633834a 100644 --- a/drivers/iommu/apple-dart.c +++ b/drivers/iommu/apple-dart.c @@ -681,6 +681,9 @@ static int apple_dart_attach_dev_identity(struct iommu_= domain *domain, if (!cfg->stream_maps[0].dart->supports_bypass) return -EINVAL; =20 + if (cfg->stream_maps[0].dart->locked) + return -EINVAL; + for_each_stream_map(i, cfg, stream_map) apple_dart_hw_enable_bypass(stream_map); return 0; --=20 2.48.1