From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-qt1-f180.google.com (mail-qt1-f180.google.com [209.85.160.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C4CFA2777FC for ; Mon, 13 Apr 2026 16:11:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.180 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776096704; cv=none; b=fOUq5tpjLSpoBREpaZ1xDrSSmyyLNhUOi4hEKy6Auf4b3zxeLKNmOlPRYsg4Q9yoOdroxS42QS+mPkYjgTFmJuod2CMXMvomHjgk8ZVGXvmcS5doZEU2O0cj7+gdlyCLO9GFq4V9L8HepBn2SWb/aTP7+0kmcVcxkkbnHyFGwX0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776096704; c=relaxed/simple; bh=SCn5wm2yybzmEsHCzOQ6NYQiDsWfUHmQMro1wb2ubo0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=RKVurTzO8g9ndPxNie+kFu4o7WqrK3ystX7E2dGVeqXDwVoE3wuNya4SY3tW9dPoQIECBPFfo7MBEFF5QdImxms6xkWkLN4DbMlGqiANEOkHSol4aaRhifXfFYZBovrkuApckGTVmSfrD2ZbGw//LXcNvIJC/gNleRlVuIHyayM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca; spf=pass smtp.mailfrom=ziepe.ca; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b=T3uXpNry; arc=none smtp.client-ip=209.85.160.180 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ziepe.ca Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="T3uXpNry" Received: by mail-qt1-f180.google.com with SMTP id d75a77b69052e-50baf2df711so36862011cf.2 for ; Mon, 13 Apr 2026 09:11:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; t=1776096702; x=1776701502; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=5qHTXTqjIeq0VpY7l9NeZbvHarj7L7Wvl8QGhgFW0Qw=; b=T3uXpNrytG5YVvcUgOxnryUEAlgXhoRlbkhY6ljtgkWi0wbLw9RY7lRuMLCHXBeokx h/Cx9uhfVjUJ2bWLqRPwx4vvG8ViqqRmsJsZNySh++3i9STdqnFoP3LtTGo9sLCfxP0V UB7oOpBcuzGJqQgf4Mk/5s3X8egkSW8nRgE+n3919E01QVxDhhR7rbeRxY+cC8GtdQ9s 17B+2ksC30KAIBJ25cgSr7j+dXi8fBqPK5YlRU0CimG+Pyauas+ri+9edC75It6YhGXM IZf6reD9EwmYPj6vJHp83pvYer90d+ZZnOsAL7i3CPsG38am2ui3hcqXo9EjoNOCtswy BfEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1776096702; x=1776701502; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=5qHTXTqjIeq0VpY7l9NeZbvHarj7L7Wvl8QGhgFW0Qw=; b=Yr6MvhU3hjTIQtRIFrfF71/jU5DKZFpiRa/H/AA9RNbl/cEtpy8Z51pGKxvE9G0HFl 5DBNp/rbnlo8zHXLNhYZtTPA467foH1enbYVRnDb7g3eSvi+BZyb9IJA7lGEB+jcNvWl JTxCV/dlK3eH/Pq2fFECvwPWS+vUohcV6x36NxAeVlgb7bLze4gDfNCatTvcjXArpWq3 76XyMCvhckY+LKRSdGAsRbW7EvCzMgIhy5V3HbXwa/l4sEtS75tLsJUsEnQ9DRCjUf5j K2E7CaVucoeDGnWEoZM3NJPiKWnh+0lvJT7dyww+hqNxsbNJ4JVWk+my57QES9EIVoZT c3Fw== X-Forwarded-Encrypted: i=1; AFNElJ+bnzEWn6PDCDFJrsWXttFyO+K+F42zby0jDdx8IRA4GPIiSt7xx3bZjA1OGxpoK8QPY/dmIFBcUp8beio=@vger.kernel.org X-Gm-Message-State: AOJu0YzElr5Bd1t9MFS3tecX7ehvC9a2CmX8A0ckL7iL4oKZtUB6xuo1 9TriDsBZCVBfVBwlEN5xj5RH54g5nDHp3U/BEDsQiyDp8LHEbLhMy/6f+wk9xzHdibM= X-Gm-Gg: AeBDiesfVpuGTg/YUiRNCB3HTUOJt4h91ppo0YZtRBayE6cnLLOTIy5nku8Qp60V3Pm XKvH2XM6HTj3l4AXMX+lH+Ccwqx9jbyAhy9kd9Qsn6cLDbaO05zeItu5osDyxE3t3jYJA7UwBBH 2xnOa1INCwwMkaKELHPljW1qG80FN3l+FHXyTtHmg1qe6RRPDdxXl08wHr2sD0LafS8VQff2bS5 7Lg63iCRreRXH/8cxikdmQWWMmjtzTzrWkBAQknvHO2oUq3RQCvDmoQPZeMfDPRDvw1tgX+OPmb iDd8VgiwW15kgh38I/rCySIXApkVRsSmR+FJ/XRXYKyppZKUpdyLdPOZbWaPYGzgREpid98wGU1 gwhOnpd6eQNVMsqG4dPfmJ62BmnkmZ2Phwf4OuHx1TCmgTKtZWIvmVjm2WNg0PG09GH0eYTJJfL 3Cc7NiEQJnvWmxvhyxwBjs5ZUinad5qPtKHo3CynxjKyLWhKR902jZaKfjdwYm6FrugnMJy3FI7 M4R7Q== X-Received: by 2002:a05:622a:4cce:b0:50b:3e64:9b2a with SMTP id d75a77b69052e-50dd5ada476mr212404671cf.20.1776096701731; Mon, 13 Apr 2026 09:11:41 -0700 (PDT) Received: from ziepe.ca (crbknf0213w-47-54-130-67.pppoe-dynamic.high-speed.nl.bellaliant.net. [47.54.130.67]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-50dd561adc2sm92695761cf.27.2026.04.13.09.11.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Apr 2026 09:11:41 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1wCJsy-00000005QJz-2hk6; Mon, 13 Apr 2026 13:11:40 -0300 Date: Mon, 13 Apr 2026 13:11:40 -0300 From: Jason Gunthorpe To: Ankit Soni Cc: iommu@lists.linux.dev, vasant.hegde@amd.com, suravee.suthikulpanit@amd.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 2/4] iommu_pt: support small VA for AMDv1 Message-ID: <20260413161140.GO3694781@ziepe.ca> References: <64515b0d53c541ae52347ac3c0f90b75bcbde0c2.1776075533.git.Ankit.Soni@amd.com> 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=us-ascii Content-Disposition: inline In-Reply-To: <64515b0d53c541ae52347ac3c0f90b75bcbde0c2.1776075533.git.Ankit.Soni@amd.com> On Mon, Apr 13, 2026 at 02:45:19PM +0000, Ankit Soni wrote: > When hardware/VM request a small VA limit, the generic page-table code > clears PT_FEAT_DYNAMIC_TOP. This later causes domain initialization to > fail with -EOPNOTSUPP. > > Remove the clearing so init succeeds when the VA fits in the starting > level and no top-level growth is needed. > > Signed-off-by: Ankit Soni > --- > drivers/iommu/generic_pt/iommu_pt.h | 4 ---- > 1 file changed, 4 deletions(-) Reviewed-by: Jason Gunthorpe Jason