From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Ellerman Subject: Re: [kernel, v11, 04/10] powerpc/vfio_spapr_tce: Add reference counting to iommu_table Date: Mon, 1 May 2017 12:58:52 +1000 (AEST) Message-ID: <3wGTdm1fsXz9sNF@ozlabs.org> References: <20170322042156.11756-5-aik@ozlabs.ru> Cc: kvm@vger.kernel.org, Alexey Kardashevskiy , kvm-ppc@vger.kernel.org, Alex Williamson , Paul Mackerras , David Gibson To: Alexey Kardashevskiy , linuxppc-dev@lists.ozlabs.org Return-path: Received: from ozlabs.org ([103.22.144.67]:59845 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753191AbdEAC6x (ORCPT ); Sun, 30 Apr 2017 22:58:53 -0400 In-Reply-To: <20170322042156.11756-5-aik@ozlabs.ru> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, 2017-03-22 at 04:21:50 UTC, Alexey Kardashevskiy wrote: > So far iommu_table obejcts were only used in virtual mode and had > a single owner. We are going to change this by implementing in-kernel > acceleration of DMA mapping requests. The proposed acceleration > will handle requests in real mode and KVM will keep references to tables. > > This adds a kref to iommu_table and defines new helpers to update it. > This replaces iommu_free_table() with iommu_tce_table_put() and makes > iommu_free_table() static. iommu_tce_table_get() is not used in this patch > but it will be in the following patch. > > Since this touches prototypes, this also removes @node_name parameter as > it has never been really useful on powernv and carrying it for > the pseries platform code to iommu_free_table() seems to be quite > useless as well. > > This should cause no behavioral change. > > Signed-off-by: Alexey Kardashevskiy > Reviewed-by: David Gibson > Acked-by: Alex Williamson Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/e5afdf9dd515a9446c009f44f99f9b cheers