From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C1E3C48BD3 for ; Wed, 26 Jun 2019 21:38:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 072E220665 for ; Wed, 26 Jun 2019 21:38:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726396AbfFZViY (ORCPT ); Wed, 26 Jun 2019 17:38:24 -0400 Received: from mga03.intel.com ([134.134.136.65]:23983 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbfFZViY (ORCPT ); Wed, 26 Jun 2019 17:38:24 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jun 2019 14:38:23 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,421,1557212400"; d="scan'208";a="360456463" Received: from iweiny-desk2.sc.intel.com ([10.3.52.157]) by fmsmga005.fm.intel.com with ESMTP; 26 Jun 2019 14:38:23 -0700 Date: Wed, 26 Jun 2019 14:38:23 -0700 From: Ira Weiny To: Christoph Hellwig Cc: Dan Williams , =?iso-8859-1?B?Suly9G1l?= Glisse , Jason Gunthorpe , Ben Skeggs , linux-nvdimm@lists.01.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org, nouveau@lists.freedesktop.org Subject: Re: [PATCH 24/25] mm: remove the HMM config option Message-ID: <20190626213822.GB8399@iweiny-DESK2.sc.intel.com> References: <20190626122724.13313-1-hch@lst.de> <20190626122724.13313-25-hch@lst.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190626122724.13313-25-hch@lst.de> User-Agent: Mutt/1.11.1 (2018-12-01) Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Wed, Jun 26, 2019 at 02:27:23PM +0200, Christoph Hellwig wrote: > All the mm/hmm.c code is better keyed off HMM_MIRROR. Also let nouveau > depend on it instead of the mix of a dummy dependency symbol plus the > actually selected one. Drop various odd dependencies, as the code is > pretty portable. > > Signed-off-by: Christoph Hellwig Seems reasonable to me. Reviewed-by: Ira Weiny > --- > drivers/gpu/drm/nouveau/Kconfig | 3 +-- > include/linux/hmm.h | 5 +---- > include/linux/mm_types.h | 2 +- > mm/Kconfig | 27 ++++----------------------- > mm/Makefile | 2 +- > mm/hmm.c | 2 -- > 6 files changed, 8 insertions(+), 33 deletions(-) > > diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig > index 6303d203ab1d..66c839d8e9d1 100644 > --- a/drivers/gpu/drm/nouveau/Kconfig > +++ b/drivers/gpu/drm/nouveau/Kconfig > @@ -84,11 +84,10 @@ config DRM_NOUVEAU_BACKLIGHT > > config DRM_NOUVEAU_SVM > bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support" > - depends on ARCH_HAS_HMM > depends on DEVICE_PRIVATE > depends on DRM_NOUVEAU > + depends on HMM_MIRROR > depends on STAGING > - select HMM_MIRROR > default n > help > Say Y here if you want to enable experimental support for > diff --git a/include/linux/hmm.h b/include/linux/hmm.h > index 3d00e9550e77..b697496e85ba 100644 > --- a/include/linux/hmm.h > +++ b/include/linux/hmm.h > @@ -62,7 +62,7 @@ > #include > #include > > -#if IS_ENABLED(CONFIG_HMM) > +#ifdef CONFIG_HMM_MIRROR > > #include > #include > @@ -332,9 +332,6 @@ static inline uint64_t hmm_pfn_from_pfn(const struct hmm_range *range, > return hmm_device_entry_from_pfn(range, pfn); > } > > - > - > -#if IS_ENABLED(CONFIG_HMM_MIRROR) > /* > * Mirroring: how to synchronize device page table with CPU page table. > * > diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h > index f33a1289c101..8d37182f8dbe 100644 > --- a/include/linux/mm_types.h > +++ b/include/linux/mm_types.h > @@ -501,7 +501,7 @@ struct mm_struct { > #endif > struct work_struct async_put_work; > > -#if IS_ENABLED(CONFIG_HMM) > +#ifdef CONFIG_HMM_MIRROR > /* HMM needs to track a few things per mm */ > struct hmm *hmm; > #endif > diff --git a/mm/Kconfig b/mm/Kconfig > index eecf037a54b3..1e426c26b1d6 100644 > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -669,37 +669,18 @@ config ZONE_DEVICE > > If FS_DAX is enabled, then say Y. > > -config ARCH_HAS_HMM_MIRROR > - bool > - default y > - depends on (X86_64 || PPC64) > - depends on MMU && 64BIT > - > -config ARCH_HAS_HMM > - bool > - depends on (X86_64 || PPC64) > - depends on ZONE_DEVICE > - depends on MMU && 64BIT > - depends on MEMORY_HOTPLUG > - depends on MEMORY_HOTREMOVE > - depends on SPARSEMEM_VMEMMAP > - default y > - > config MIGRATE_VMA_HELPER > bool > > config DEV_PAGEMAP_OPS > bool > > -config HMM > - bool > - select MMU_NOTIFIER > - select MIGRATE_VMA_HELPER > - > config HMM_MIRROR > bool "HMM mirror CPU page table into a device page table" > - depends on ARCH_HAS_HMM > - select HMM > + depends on (X86_64 || PPC64) > + depends on MMU && 64BIT > + select MMU_NOTIFIER > + select MIGRATE_VMA_HELPER > help > Select HMM_MIRROR if you want to mirror range of the CPU page table of a > process into a device page table. Here, mirror means "keep synchronized". > diff --git a/mm/Makefile b/mm/Makefile > index ac5e5ba78874..91c99040065c 100644 > --- a/mm/Makefile > +++ b/mm/Makefile > @@ -102,5 +102,5 @@ obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o > obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o > obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o > obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o > -obj-$(CONFIG_HMM) += hmm.o > +obj-$(CONFIG_HMM_MIRROR) += hmm.o > obj-$(CONFIG_MEMFD_CREATE) += memfd.o > diff --git a/mm/hmm.c b/mm/hmm.c > index 90ca0cdab9db..d62ce64d6bca 100644 > --- a/mm/hmm.c > +++ b/mm/hmm.c > @@ -25,7 +25,6 @@ > #include > #include > > -#if IS_ENABLED(CONFIG_HMM_MIRROR) > static const struct mmu_notifier_ops hmm_mmu_notifier_ops; > > static inline struct hmm *mm_get_hmm(struct mm_struct *mm) > @@ -1326,4 +1325,3 @@ long hmm_range_dma_unmap(struct hmm_range *range, > return cpages; > } > EXPORT_SYMBOL(hmm_range_dma_unmap); > -#endif /* IS_ENABLED(CONFIG_HMM_MIRROR) */ > -- > 2.20.1 > > _______________________________________________ > Linux-nvdimm mailing list > Linux-nvdimm@lists.01.org > https://lists.01.org/mailman/listinfo/linux-nvdimm