From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (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 76ED219006B for ; Thu, 30 Oct 2025 11:07:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.176.79.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761822463; cv=none; b=q6vtUGUVXGRFsdr3eBiss9TK+oYc9I5w3et/R0h0ksHShfWwBB8gioeZxeE5LcfQVov/VSPiSyizvuBMXuZbq4D5ngkRjIn3qaApITIGQgP92CQlqhftfo9+PhIyrU3xJGdzHUL7XOSMYkgvskyZXA+mNK17IDLwIX6QEFUDuRk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761822463; c=relaxed/simple; bh=N0YReuMxONND+LJciwzRT1TXb+Uijo5vpLMrGXSUkIw=; h=Date:From:To:CC:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=uoQN4V7iVMANBFmlD6AjqOVKb/uKGT/uVAUiMV90bfw2Qk1K7uhCmoJyt8TLijo//gLeq4YwZz3n22yVBh1ipJ2ESTp7N/Tjl03h4XpEXB/lW78+mCpSjA3DDdqd+sOTEdSZ6xj399bZ4qcR7yBEsTzl6/pvFTAQepoUMtrPTzs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=185.176.79.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.18.186.216]) by frasgout.his.huawei.com (SkyGuard) with ESMTPS id 4cy1X36H94zHnHBj; Thu, 30 Oct 2025 11:06:43 +0000 (UTC) Received: from dubpeml100005.china.huawei.com (unknown [7.214.146.113]) by mail.maildlp.com (Postfix) with ESMTPS id 3E7D8140370; Thu, 30 Oct 2025 19:07:38 +0800 (CST) Received: from localhost (10.203.177.15) by dubpeml100005.china.huawei.com (7.214.146.113) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Thu, 30 Oct 2025 11:07:37 +0000 Date: Thu, 30 Oct 2025 11:07:36 +0000 From: Jonathan Cameron To: Dan Williams CC: , , , , Xu Yilun Subject: Re: [RFC PATCH 15/27] x86/virt/tdx: Extend tdx_page_array to support IOMMU_MT Message-ID: <20251030110736.00000251@huawei.com> In-Reply-To: <20250919142237.418648-16-dan.j.williams@intel.com> References: <20250919142237.418648-1-dan.j.williams@intel.com> <20250919142237.418648-16-dan.j.williams@intel.com> X-Mailer: Claws Mail 4.3.0 (GTK 3.24.42; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: lhrpeml500012.china.huawei.com (7.191.174.4) To dubpeml100005.china.huawei.com (7.214.146.113) On Fri, 19 Sep 2025 07:22:24 -0700 Dan Williams wrote: > From: Xu Yilun > > IOMMU_MT is another TDX Module defined structure similar to HPA_ARRAY_T > and HPA_LIST_INFO. The difference is it supports multi-order contiguous > pages. It adds an additional NUM_PAGES field for every multi-order page > entry [1]. > > Add an dedicated allocation helper for IOMMU_MT. Maybe a general > allocation helper for multi-order is better but could postpond until postponed > another user appears. > > Signed-off-by: Xu Yilun > Signed-off-by: Dan Williams > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 1ae97a0b8ec7..719cc479f9e7 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -1360,6 +1360,8 @@ static inline void folio_put(struct folio *folio) > __folio_put(folio); > } > > +DEFINE_FREE(folio_put, struct folio *, if (_T) folio_put(_T)) Another case of buried mm stuff that maybe could go ahead of this series so this doesn't stall on any controversy around that. > + > /** > * folio_put_refs - Reduce the reference count on a folio. > * @folio: The folio.