From patchwork Thu Jul 23 22:29:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681719 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6CB3C618 for ; Thu, 23 Jul 2020 22:31:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3968B2086A for ; Thu, 23 Jul 2020 22:31:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="E3+/KAUU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3968B2086A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1CE928D0007; Thu, 23 Jul 2020 18:30:54 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id E34A28D0008; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A40238D000B; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0240.hostedemail.com [216.40.44.240]) by kanga.kvack.org (Postfix) with ESMTP id 721B38D0007 for ; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 37C9818020C5A for ; Thu, 23 Jul 2020 22:30:53 +0000 (UTC) X-FDA: 77070786786.17.quill56_1c0320226f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin17.hostedemail.com (Postfix) with ESMTP id 034B0180CE686 for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30054:30064:30070:30090,0,RBL:216.228.121.64:@nvidia.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;04yro69op8mmdbgi5eqxpxd4iqwz3oco1qw9yw3rzrhmq77ky3h3zpqie9rthzm.sn8gcqnrcsfhqhh9dpdsyr7tsnf911w86ian1sy1hig8pd7x3pe4ia981n5hac5.h-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: quill56_1c0320226f42 X-Filterd-Recvd-Size: 4893 Received: from hqnvemgate25.nvidia.com (hqnvemgate25.nvidia.com [216.228.121.64]) by imf42.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:29:47 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:50 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 23 Jul 2020 15:30:50 -0700 Received: from HQMAIL101.nvidia.com (172.20.187.10) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:40 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:40 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 1/6] nouveau: fix storing invalid ptes Date: Thu, 23 Jul 2020 15:29:59 -0700 Message-ID: <20200723223004.9586-2-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595543388; bh=rz9ii3/rSLaotraZODv9PDOOFrnasJhkv9z9XY7GWhs=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=E3+/KAUUqwLXLfwvdT+lj/P9kOToRLPz0UK75f70li06/p9lJdiPkbhtDmlv4gQjs ti6s6fgiX2LRqmQgf/03a4snWnkf0qBpsNXnxIUiqPGgf7gFl2EDegk9ceNBbcz3Wn KsDYf4gPKfuCFPIRc++kdUK7kWQWvirXBbrsJtJ5MON8nVXPKQnio9sYYOlbFFvdEe R8s0IatMhkVom7f3Hx3lPBLIJwLqpGN6jUEPXhHqySKWoaxFhDLmNhkqytuD0KlctL zAaKcWE5GGFzHyBKFlfhERPiWPOUWUsjcSk90ptH6VBrMLqT5WG4BzoW5Za5NeYACA VtOx3M32JqeBw== X-Rspamd-Queue-Id: 034B0180CE686 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When migrating a range of system memory to device private memory, some of the pages in the address range may not be migrating. In this case, the non migrating pages won't have a new GPU MMU entry to store but the nvif_object_ioctl() NVIF_VMM_V0_PFNMAP method doesn't check the input and stores a bad valid GPU page table entry. Fix this by skipping the invalid input PTEs when updating the GPU page tables. Signed-off-by: Ralph Campbell --- drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c index ed37fddd063f..7eabe9fe0d2b 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmgp100.c @@ -79,8 +79,12 @@ gp100_vmm_pgt_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, dma_addr_t addr; nvkm_kmap(pt->memory); - while (ptes--) { + for (; ptes; ptes--, map->pfn++) { u64 data = 0; + + if (!(*map->pfn & NVKM_VMM_PFN_V)) + continue; + if (!(*map->pfn & NVKM_VMM_PFN_W)) data |= BIT_ULL(6); /* RO. */ @@ -100,7 +104,6 @@ gp100_vmm_pgt_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, } VMM_WO064(pt, vmm, ptei++ * 8, data); - map->pfn++; } nvkm_done(pt->memory); } @@ -310,9 +313,12 @@ gp100_vmm_pd0_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, dma_addr_t addr; nvkm_kmap(pt->memory); - while (ptes--) { + for (; ptes; ptes--, map->pfn++) { u64 data = 0; + if (!(*map->pfn & NVKM_VMM_PFN_V)) + continue; + if (!(*map->pfn & NVKM_VMM_PFN_W)) data |= BIT_ULL(6); /* RO. */ @@ -332,7 +338,6 @@ gp100_vmm_pd0_pfn(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt, } VMM_WO064(pt, vmm, ptei++ * 16, data); - map->pfn++; } nvkm_done(pt->memory); } From patchwork Thu Jul 23 22:30:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681713 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8D845618 for ; Thu, 23 Jul 2020 22:30:59 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4FB4120737 for ; Thu, 23 Jul 2020 22:30:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="DWAOAVtJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4FB4120737 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id D52388D0001; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id C1A648D0007; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 9C63F8D0008; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0047.hostedemail.com [216.40.44.47]) by kanga.kvack.org (Postfix) with ESMTP id 644F88D0008 for ; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 2B981824805A for ; Thu, 23 Jul 2020 22:30:53 +0000 (UTC) X-FDA: 77070786786.13.rat42_37107b926f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id E81F818020C5A for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30003:30054:30064:30070:30079,0,RBL:216.228.121.143:@nvidia.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;04yfcznz3pckumcjfc5i8kwsgajt6ypq1uxjarrmk5f6tch7mp3knjq6ayrefcx.zqnckbd9t7d3mcpfyhzu6dnq1nuzixnhzcmdpeyf8nq7og1dz6nb4ubnox46e77.n-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:26,LUA_SUMMARY:none X-HE-Tag: rat42_37107b926f42 X-Filterd-Recvd-Size: 8839 Received: from hqnvemgate24.nvidia.com (hqnvemgate24.nvidia.com [216.228.121.143]) by imf15.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:28:48 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:50 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 23 Jul 2020 15:30:50 -0700 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:40 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:40 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 2/6] mm/migrate: add a flags parameter to migrate_vma Date: Thu, 23 Jul 2020 15:30:00 -0700 Message-ID: <20200723223004.9586-3-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595543328; bh=nIFIBksj2w4f7R+zCtSW146U+29mGvSr6vO7uHKn5WE=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=DWAOAVtJZXwt3phjE/GEGLWSBeDjGNkoYm8RbTSF2iji2Yv98QrFdyfMc48OTbqTc YA3w5yCghm/iVzluNlgnQ8h6tSx4uUkGgCohpQfw5XWd/lNMXUe5QofLs6JKF/wNf5 TacFiAzIX2R943mL79MxYwHgisb0HHZr8WNuw7iLySFbgX1TPXxDlPq5hvRQ3dESp/ 5OuPH6+R3NMOuVrcAR7OuCrNpmwyvKdhz5YnhO+ngTTX7ls4wOdWV7Q82nIg9T3NCO pkONmMtb52N4dfDlqZNiP8Jfx/inKQHjMpQpFB/u51pEzY86LD3Mxqsh0pf/khfy2h vV7NMxOXErQvw== X-Rspamd-Queue-Id: E81F818020C5A X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The src_owner field in struct migrate_vma is being used for two purposes, it acts as a selection filter for which types of pages are to be migrated and it identifies device private pages owned by the caller. Split this into separate parameters so the src_owner field can be used just to identify device private pages owned by the caller of migrate_vma_setup(). Rename the src_owner field to pgmap_owner to reflect it is now used only to identify which device private pages to migrate. Signed-off-by: Ralph Campbell Reviewed-by: Bharata B Rao --- arch/powerpc/kvm/book3s_hv_uvmem.c | 4 +++- drivers/gpu/drm/nouveau/nouveau_dmem.c | 4 +++- include/linux/migrate.h | 13 +++++++++---- lib/test_hmm.c | 15 ++++----------- mm/migrate.c | 6 ++++-- 5 files changed, 23 insertions(+), 19 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 09d8119024db..6850bd04bcb9 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -400,6 +400,7 @@ kvmppc_svm_page_in(struct vm_area_struct *vma, unsigned long start, mig.end = end; mig.src = &src_pfn; mig.dst = &dst_pfn; + mig.flags = MIGRATE_VMA_SELECT_SYSTEM; /* * We come here with mmap_lock write lock held just for @@ -577,7 +578,8 @@ kvmppc_svm_page_out(struct vm_area_struct *vma, unsigned long start, mig.end = end; mig.src = &src_pfn; mig.dst = &dst_pfn; - mig.src_owner = &kvmppc_uvmem_pgmap; + mig.pgmap_owner = &kvmppc_uvmem_pgmap; + mig.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; mutex_lock(&kvm->arch.uvmem_lock); /* The requested page is already paged-out, nothing to do */ diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index e5c230d9ae24..78b9e3c2a5b3 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -182,7 +182,8 @@ static vm_fault_t nouveau_dmem_migrate_to_ram(struct vm_fault *vmf) .end = vmf->address + PAGE_SIZE, .src = &src, .dst = &dst, - .src_owner = drm->dev, + .pgmap_owner = drm->dev, + .flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE, }; /* @@ -615,6 +616,7 @@ nouveau_dmem_migrate_vma(struct nouveau_drm *drm, struct migrate_vma args = { .vma = vma, .start = start, + .flags = MIGRATE_VMA_SELECT_SYSTEM, }; unsigned long i; u64 *pfns; diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 3e546cbf03dd..aafec0ca7b41 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -180,6 +180,11 @@ static inline unsigned long migrate_pfn(unsigned long pfn) return (pfn << MIGRATE_PFN_SHIFT) | MIGRATE_PFN_VALID; } +enum migrate_vma_direction { + MIGRATE_VMA_SELECT_SYSTEM = (1UL << 0), + MIGRATE_VMA_SELECT_DEVICE_PRIVATE = (1UL << 1), +}; + struct migrate_vma { struct vm_area_struct *vma; /* @@ -199,11 +204,11 @@ struct migrate_vma { /* * Set to the owner value also stored in page->pgmap->owner for - * migrating out of device private memory. If set only device - * private pages with this owner are migrated. If not set - * device private pages are not migrated at all. + * migrating out of device private memory. The flags also need to + * be set to MIGRATE_VMA_SELECT_DEVICE_PRIVATE. */ - void *src_owner; + void *pgmap_owner; + unsigned long flags; }; int migrate_vma_setup(struct migrate_vma *args); diff --git a/lib/test_hmm.c b/lib/test_hmm.c index 9aa577afc269..e78a1414f58e 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -585,15 +585,6 @@ static void dmirror_migrate_alloc_and_copy(struct migrate_vma *args, */ spage = migrate_pfn_to_page(*src); - /* - * Don't migrate device private pages from our own driver or - * others. For our own we would do a device private memory copy - * not a migration and for others, we would need to fault the - * other device's page into system memory first. - */ - if (spage && is_zone_device_page(spage)) - continue; - dpage = dmirror_devmem_alloc_page(mdevice); if (!dpage) continue; @@ -702,7 +693,8 @@ static int dmirror_migrate(struct dmirror *dmirror, args.dst = dst_pfns; args.start = addr; args.end = next; - args.src_owner = NULL; + args.pgmap_owner = NULL; + args.flags = MIGRATE_VMA_SELECT_SYSTEM; ret = migrate_vma_setup(&args); if (ret) goto out; @@ -1053,7 +1045,8 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf) args.end = args.start + PAGE_SIZE; args.src = &src_pfns; args.dst = &dst_pfns; - args.src_owner = dmirror->mdevice; + args.pgmap_owner = dmirror->mdevice; + args.flags = MIGRATE_VMA_SELECT_DEVICE_PRIVATE; if (migrate_vma_setup(&args)) return VM_FAULT_SIGBUS; diff --git a/mm/migrate.c b/mm/migrate.c index f37729673558..e3ea68e3a08b 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2287,7 +2287,9 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, goto next; page = device_private_entry_to_page(entry); - if (page->pgmap->owner != migrate->src_owner) + if (!(migrate->flags & + MIGRATE_VMA_SELECT_DEVICE_PRIVATE) || + page->pgmap->owner != migrate->pgmap_owner) goto next; mpfn = migrate_pfn(page_to_pfn(page)) | @@ -2295,7 +2297,7 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp, if (is_write_device_private_entry(entry)) mpfn |= MIGRATE_PFN_WRITE; } else { - if (migrate->src_owner) + if (!(migrate->flags & MIGRATE_VMA_SELECT_SYSTEM)) goto next; pfn = pte_pfn(pte); if (is_zero_pfn(pfn)) { From patchwork Thu Jul 23 22:30:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681705 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BA749159A for ; Thu, 23 Jul 2020 22:30:53 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8738720888 for ; Thu, 23 Jul 2020 22:30:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="DEe/zZsq" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8738720888 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 891898D0005; Thu, 23 Jul 2020 18:30:51 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 81C3C8D0001; Thu, 23 Jul 2020 18:30:51 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 670848D0005; Thu, 23 Jul 2020 18:30:51 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0047.hostedemail.com [216.40.44.47]) by kanga.kvack.org (Postfix) with ESMTP id 4C6708D0001 for ; Thu, 23 Jul 2020 18:30:51 -0400 (EDT) Received: from smtpin06.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 07DF08248047 for ; Thu, 23 Jul 2020 22:30:51 +0000 (UTC) X-FDA: 77070786702.06.field34_240e2fb26f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin06.hostedemail.com (Postfix) with ESMTP id C882F1003D0DE for ; Thu, 23 Jul 2020 22:30:50 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30003:30054:30064,0,RBL:216.228.121.143:@nvidia.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;04yro47rhhgyhemj7zsbzzxjocdwgopus1reodu8jr9erynd6aadgt9taikissc.c3ktwub3b3heppay1bpc7yz46engupwbi9kf6zuehdsaekiysksi68oy6if6yf3.4-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:35,LUA_SUMMARY:none X-HE-Tag: field34_240e2fb26f42 X-Filterd-Recvd-Size: 6811 Received: from hqnvemgate24.nvidia.com (hqnvemgate24.nvidia.com [216.228.121.143]) by imf28.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:50 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:28:46 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:48 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 23 Jul 2020 15:30:48 -0700 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:41 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 3/6] mm/notifier: add migration invalidation type Date: Thu, 23 Jul 2020 15:30:01 -0700 Message-ID: <20200723223004.9586-4-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595543326; bh=YxemRVSG9j1xekTjy+tk+YO7UYs97J+WY0eBPs1d0Nk=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=DEe/zZsq6Wgo/kfUjDkBDQP1LV+ZwlKp6wdNvZgj58qjUbNPggPMyL6wRdCBQ63M1 mcaRtS9hWBXfPZeN4b4T279qT6ulJ9zu0aacX9z1xR44Gc+TBA4PIcNcidvBrIjSNq UsQIyqmeS6JIpfwvLwYpdbbK2AiY4ok0p/y56JpDtbxtgB0/25Ar9A6ZbUzIlfomRY 8HnVtPG/mcT8exm4A7yGUVGwmZ9PPsugcRPn883JWr7PNX86cujvx3pa8yQnFo/jD+ XK79h0uPtK1G5oWI6CUjXW5gCnwwdLNV1YQcgcIW+jF27X9L9CYYgi95tinBrp3OTc xT4Sna8EGkocw== X-Rspamd-Queue-Id: C882F1003D0DE X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Currently migrate_vma_setup() calls mmu_notifier_invalidate_range_start() which flushes all device private page mappings whether or not a page is being migrated to/from device private memory. In order to not disrupt device mappings that are not being migrated, shift the responsibility for clearing device private mappings to the device driver and leave CPU page table unmapping handled by migrate_vma_setup(). To support this, the caller of migrate_vma_setup() should always set struct migrate_vma::pgmap_owner to a non NULL value that matches the device private page->pgmap->owner. This value is then passed to the struct mmu_notifier_range with a new event type which the driver's invalidation function can use to avoid device MMU invalidations. Signed-off-by: Ralph Campbell Acked-by: Ralph Campbell --- include/linux/migrate.h | 3 +++ include/linux/mmu_notifier.h | 7 +++++++ mm/migrate.c | 8 +++++++- 3 files changed, 17 insertions(+), 1 deletion(-) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index aafec0ca7b41..4cc7097d0271 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -206,6 +206,9 @@ struct migrate_vma { * Set to the owner value also stored in page->pgmap->owner for * migrating out of device private memory. The flags also need to * be set to MIGRATE_VMA_SELECT_DEVICE_PRIVATE. + * The caller should always set this field when using mmu notifier + * callbacks to avoid device MMU invalidations for device private + * pages that are not being migrated. */ void *pgmap_owner; unsigned long flags; diff --git a/include/linux/mmu_notifier.h b/include/linux/mmu_notifier.h index fc68f3570e19..1921fcf6be5b 100644 --- a/include/linux/mmu_notifier.h +++ b/include/linux/mmu_notifier.h @@ -38,6 +38,10 @@ struct mmu_interval_notifier; * * @MMU_NOTIFY_RELEASE: used during mmu_interval_notifier invalidate to signal * that the mm refcount is zero and the range is no longer accessible. + * + * @MMU_NOTIFY_MIGRATE: used during migrate_vma_collect() invalidate to signal + * a device driver to possibly ignore the invalidation if the + * migrate_pgmap_owner field matches the driver's device private pgmap owner. */ enum mmu_notifier_event { MMU_NOTIFY_UNMAP = 0, @@ -46,6 +50,7 @@ enum mmu_notifier_event { MMU_NOTIFY_PROTECTION_PAGE, MMU_NOTIFY_SOFT_DIRTY, MMU_NOTIFY_RELEASE, + MMU_NOTIFY_MIGRATE, }; #define MMU_NOTIFIER_RANGE_BLOCKABLE (1 << 0) @@ -264,6 +269,7 @@ struct mmu_notifier_range { unsigned long end; unsigned flags; enum mmu_notifier_event event; + void *migrate_pgmap_owner; }; static inline int mm_has_notifiers(struct mm_struct *mm) @@ -513,6 +519,7 @@ static inline void mmu_notifier_range_init(struct mmu_notifier_range *range, range->start = start; range->end = end; range->flags = flags; + range->migrate_pgmap_owner = NULL; } #define ptep_clear_flush_young_notify(__vma, __address, __ptep) \ diff --git a/mm/migrate.c b/mm/migrate.c index e3ea68e3a08b..96e1f41a991e 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2392,8 +2392,14 @@ static void migrate_vma_collect(struct migrate_vma *migrate) { struct mmu_notifier_range range; - mmu_notifier_range_init(&range, MMU_NOTIFY_CLEAR, 0, NULL, + /* + * Note that the pgmap_owner is passed to the mmu notifier callback so + * that the registered device driver can skip invalidating device + * private page mappings that won't be migrated. + */ + mmu_notifier_range_init(&range, MMU_NOTIFY_MIGRATE, 0, migrate->vma, migrate->vma->vm_mm, migrate->start, migrate->end); + range.migrate_pgmap_owner = migrate->pgmap_owner; mmu_notifier_invalidate_range_start(&range); walk_page_range(migrate->vma->vm_mm, migrate->start, migrate->end, From patchwork Thu Jul 23 22:30:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681701 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C9D686C1 for ; Thu, 23 Jul 2020 22:30:51 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8C0172080D for ; Thu, 23 Jul 2020 22:30:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="K+uzCyO5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8C0172080D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9A0568D0003; Thu, 23 Jul 2020 18:30:50 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 9519C8D0001; Thu, 23 Jul 2020 18:30:50 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 817868D0003; Thu, 23 Jul 2020 18:30:50 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0083.hostedemail.com [216.40.44.83]) by kanga.kvack.org (Postfix) with ESMTP id 67FB58D0001 for ; Thu, 23 Jul 2020 18:30:50 -0400 (EDT) Received: from smtpin11.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id E7F1B181AF5D7 for ; Thu, 23 Jul 2020 22:30:49 +0000 (UTC) X-FDA: 77070786618.11.brake92_020975926f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id B78BD180397DB for ; Thu, 23 Jul 2020 22:30:49 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30054:30064:30070,0,RBL:216.228.121.65:@nvidia.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;04ygwuutzf686pupstiw8jy5m9u96opqhok4om81jwrdgr4u8oqm187ykr1gaaf.tifrtsotneikserjh133trxgsuec4hb3r15t4xod5ru5fyquh5rycnmrhcbg87s.s-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: brake92_020975926f42 X-Filterd-Recvd-Size: 8916 Received: from hqnvemgate26.nvidia.com (hqnvemgate26.nvidia.com [216.228.121.65]) by imf14.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:49 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate26.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:30:35 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:47 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 23 Jul 2020 15:30:47 -0700 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:41 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:41 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 4/6] nouveau/svm: use the new migration invalidation Date: Thu, 23 Jul 2020 15:30:02 -0700 Message-ID: <20200723223004.9586-5-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595543435; bh=inLsVikJBBkWjiEyE8zRFI/DuD2s6zsmXcBd/dKKSw0=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=K+uzCyO5X+CLEDAY7hOvTpRj7xhokS2k4OA2vew5F6595FKjKW5ieWRPS5yz2DLXz rNJgnx0ioa7neP0Ab9S6mlbOkXNY/MKIg3Yb/46kqMZ+iCMjnpYqHhQxbWG0UHVlsv SLpw/u4OjTvdbmIAneTACH/JyWbpOxNh958OzcJXGbTJ6mkcS+jPVonss2F4hY2Sex kWEviWFSMYVGY4bArXShWnEoeoGRx/NqtR42tPU0nOMD7DJ8IBmA6EIoh+L0Lp/Ejg ZQVp5wsjvEdPHdZ30FmYNC/o2TsW1vMRW0AbU8/GWqxSIH2486JWA3ZiQ8USD/MdhI YnjS1cUyPioOQ== X-Rspamd-Queue-Id: B78BD180397DB X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use the new MMU_NOTIFY_MIGRATE event to skip GPU MMU invalidations of device private memory and handle the invalidation in the driver as part of migrating device private memory. Signed-off-by: Ralph Campbell --- drivers/gpu/drm/nouveau/nouveau_dmem.c | 15 ++++++++++++--- drivers/gpu/drm/nouveau/nouveau_svm.c | 21 +++++++++------------ drivers/gpu/drm/nouveau/nouveau_svm.h | 13 ++++++++++++- 3 files changed, 33 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index 78b9e3c2a5b3..511fe04cd680 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -140,6 +140,7 @@ static vm_fault_t nouveau_dmem_fault_copy_one(struct nouveau_drm *drm, { struct device *dev = drm->dev->dev; struct page *dpage, *spage; + struct nouveau_svmm *svmm; spage = migrate_pfn_to_page(args->src[0]); if (!spage || !(args->src[0] & MIGRATE_PFN_MIGRATE)) @@ -154,14 +155,19 @@ static vm_fault_t nouveau_dmem_fault_copy_one(struct nouveau_drm *drm, if (dma_mapping_error(dev, *dma_addr)) goto error_free_page; + svmm = spage->zone_device_data; + mutex_lock(&svmm->mutex); + nouveau_svmm_invalidate(svmm, args->start, args->end); if (drm->dmem->migrate.copy_func(drm, 1, NOUVEAU_APER_HOST, *dma_addr, NOUVEAU_APER_VRAM, nouveau_dmem_page_addr(spage))) goto error_dma_unmap; + mutex_unlock(&svmm->mutex); args->dst[0] = migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED; return 0; error_dma_unmap: + mutex_unlock(&svmm->mutex); dma_unmap_page(dev, *dma_addr, PAGE_SIZE, DMA_BIDIRECTIONAL); error_free_page: __free_page(dpage); @@ -531,7 +537,8 @@ nouveau_dmem_init(struct nouveau_drm *drm) } static unsigned long nouveau_dmem_migrate_copy_one(struct nouveau_drm *drm, - unsigned long src, dma_addr_t *dma_addr, u64 *pfn) + struct nouveau_svmm *svmm, unsigned long src, + dma_addr_t *dma_addr, u64 *pfn) { struct device *dev = drm->dev->dev; struct page *dpage, *spage; @@ -561,6 +568,7 @@ static unsigned long nouveau_dmem_migrate_copy_one(struct nouveau_drm *drm, goto out_free_page; } + dpage->zone_device_data = svmm; *pfn = NVIF_VMM_PFNMAP_V0_V | NVIF_VMM_PFNMAP_V0_VRAM | ((paddr >> PAGE_SHIFT) << NVIF_VMM_PFNMAP_V0_ADDR_SHIFT); if (src & MIGRATE_PFN_WRITE) @@ -584,8 +592,8 @@ static void nouveau_dmem_migrate_chunk(struct nouveau_drm *drm, unsigned long addr = args->start, nr_dma = 0, i; for (i = 0; addr < args->end; i++) { - args->dst[i] = nouveau_dmem_migrate_copy_one(drm, args->src[i], - dma_addrs + nr_dma, pfns + i); + args->dst[i] = nouveau_dmem_migrate_copy_one(drm, svmm, + args->src[i], dma_addrs + nr_dma, pfns + i); if (!dma_mapping_error(drm->dev->dev, dma_addrs[nr_dma])) nr_dma++; addr += PAGE_SIZE; @@ -616,6 +624,7 @@ nouveau_dmem_migrate_vma(struct nouveau_drm *drm, struct migrate_vma args = { .vma = vma, .start = start, + .pgmap_owner = drm->dev, .flags = MIGRATE_VMA_SELECT_SYSTEM, }; unsigned long i; diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c index c5f8ca6fb2e3..67b068ac57b2 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.c +++ b/drivers/gpu/drm/nouveau/nouveau_svm.c @@ -93,17 +93,6 @@ nouveau_ivmm_find(struct nouveau_svm *svm, u64 inst) return NULL; } -struct nouveau_svmm { - struct mmu_notifier notifier; - struct nouveau_vmm *vmm; - struct { - unsigned long start; - unsigned long limit; - } unmanaged; - - struct mutex mutex; -}; - #define SVMM_DBG(s,f,a...) \ NV_DEBUG((s)->vmm->cli->drm, "svm-%p: "f"\n", (s), ##a) #define SVMM_ERR(s,f,a...) \ @@ -246,7 +235,7 @@ nouveau_svmm_join(struct nouveau_svmm *svmm, u64 inst) } /* Invalidate SVMM address-range on GPU. */ -static void +void nouveau_svmm_invalidate(struct nouveau_svmm *svmm, u64 start, u64 limit) { if (limit > start) { @@ -279,6 +268,14 @@ nouveau_svmm_invalidate_range_start(struct mmu_notifier *mn, if (unlikely(!svmm->vmm)) goto out; + /* + * Ignore invalidation callbacks for device private pages since + * the invalidation is handled as part of the migration process. + */ + if (update->event == MMU_NOTIFY_MIGRATE && + update->migrate_pgmap_owner == svmm->vmm->cli->drm->dev) + goto out; + if (limit > svmm->unmanaged.start && start < svmm->unmanaged.limit) { if (start < svmm->unmanaged.start) { nouveau_svmm_invalidate(svmm, start, diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.h b/drivers/gpu/drm/nouveau/nouveau_svm.h index f0fcd1b72e8b..e7d63d7f0c2d 100644 --- a/drivers/gpu/drm/nouveau/nouveau_svm.h +++ b/drivers/gpu/drm/nouveau/nouveau_svm.h @@ -1,11 +1,21 @@ #ifndef __NOUVEAU_SVM_H__ #define __NOUVEAU_SVM_H__ #include +#include struct drm_device; struct drm_file; struct nouveau_drm; -struct nouveau_svmm; +struct nouveau_svmm { + struct mmu_notifier notifier; + struct nouveau_vmm *vmm; + struct { + unsigned long start; + unsigned long limit; + } unmanaged; + + struct mutex mutex; +}; #if IS_ENABLED(CONFIG_DRM_NOUVEAU_SVM) void nouveau_svm_init(struct nouveau_drm *); @@ -19,6 +29,7 @@ int nouveau_svmm_join(struct nouveau_svmm *, u64 inst); void nouveau_svmm_part(struct nouveau_svmm *, u64 inst); int nouveau_svmm_bind(struct drm_device *, void *, struct drm_file *); +void nouveau_svmm_invalidate(struct nouveau_svmm *svmm, u64 start, u64 limit); u64 *nouveau_pfns_alloc(unsigned long npages); void nouveau_pfns_free(u64 *pfns); void nouveau_pfns_map(struct nouveau_svmm *svmm, struct mm_struct *mm, From patchwork Thu Jul 23 22:30:03 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681709 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9E7696C1 for ; Thu, 23 Jul 2020 22:30:55 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 6B10020737 for ; Thu, 23 Jul 2020 22:30:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="c5NVsizi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B10020737 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 29FB68D0006; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 202EA8D0001; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0C8608D0006; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0162.hostedemail.com [216.40.44.162]) by kanga.kvack.org (Postfix) with ESMTP id E92C78D0001 for ; Thu, 23 Jul 2020 18:30:52 -0400 (EDT) Received: from smtpin02.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id A9F738248047 for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) X-FDA: 77070786744.02.pear93_4b1785b26f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin02.hostedemail.com (Postfix) with ESMTP id 6FF5A100975AB for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30054:30056:30064:30070,0,RBL:216.228.121.143:@nvidia.com:.lbl8.mailshell.net-62.18.0.100 64.10.201.10;04yrtdk7pzebppk6mk51dq9g7x6hrypbzdstpdxnztcbinboid1ehy5iyazuofe.4iahq99cwtswnd1toty4d38tnmu4mxowrtpjx35jm3oywf9xzsrewkhq7bkjdob.h-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: pear93_4b1785b26f42 X-Filterd-Recvd-Size: 7618 Received: from hqnvemgate24.nvidia.com (hqnvemgate24.nvidia.com [216.228.121.143]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:51 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:28:48 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:50 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 23 Jul 2020 15:30:50 -0700 Received: from HQMAIL105.nvidia.com (172.20.187.12) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:42 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:42 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:41 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 5/6] mm/hmm/test: use the new migration invalidation Date: Thu, 23 Jul 2020 15:30:03 -0700 Message-ID: <20200723223004.9586-6-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1595543328; bh=BeVUOTJgQepW+LMWyDGWqpRY0jrU7O9ftBuhCh+HHBg=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=c5NVsiziP4cirzdcWC6K4LcVP4KSZN9WPHjiDB+wb369XeSgW+x0ffbg5/GsZEdHZ VNlqkYRVXriPkI7ArKZLO64O9s9bii6xIeiWVSn4lGPyTmw4PRgI+Gtqh+QLzLZuZj YWQRDbCiFOqf/ouBw74NnHOkciuxCGS3m1CrofSqd3zATJF3aqCFPcZZXNR6CqiIZz KekhEI0xT5i1MApDLFN41+rGbDo1hdbh0//Zubm+a3DuFfV5TO6Xv8RGAzhZEjAhEO j5W7XxfbfN+/isxrdbiUbqx1idn5RUo2XnM3MonM0s/2zPxlLTN2gpqZZau7Ejo0tO MGzZ+BIT5US8A== X-Rspamd-Queue-Id: 6FF5A100975AB X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use the new MMU_NOTIFY_MIGRATE event to skip MMU invalidations of device private memory and handle the invalidation in the driver as part of migrating device private memory. Signed-off-by: Ralph Campbell --- lib/test_hmm.c | 30 +++++++++++++++----------- tools/testing/selftests/vm/hmm-tests.c | 18 ++++++++++++---- 2 files changed, 31 insertions(+), 17 deletions(-) diff --git a/lib/test_hmm.c b/lib/test_hmm.c index e78a1414f58e..e7dc3de355b7 100644 --- a/lib/test_hmm.c +++ b/lib/test_hmm.c @@ -214,6 +214,14 @@ static bool dmirror_interval_invalidate(struct mmu_interval_notifier *mni, { struct dmirror *dmirror = container_of(mni, struct dmirror, notifier); + /* + * Ignore invalidation callbacks for device private pages since + * the invalidation is handled as part of the migration process. + */ + if (range->event == MMU_NOTIFY_MIGRATE && + range->migrate_pgmap_owner == dmirror->mdevice) + return true; + if (mmu_notifier_range_blockable(range)) mutex_lock(&dmirror->mutex); else if (!mutex_trylock(&dmirror->mutex)) @@ -693,7 +701,7 @@ static int dmirror_migrate(struct dmirror *dmirror, args.dst = dst_pfns; args.start = addr; args.end = next; - args.pgmap_owner = NULL; + args.pgmap_owner = dmirror->mdevice; args.flags = MIGRATE_VMA_SELECT_SYSTEM; ret = migrate_vma_setup(&args); if (ret) @@ -983,7 +991,7 @@ static void dmirror_devmem_free(struct page *page) } static vm_fault_t dmirror_devmem_fault_alloc_and_copy(struct migrate_vma *args, - struct dmirror_device *mdevice) + struct dmirror *dmirror) { const unsigned long *src = args->src; unsigned long *dst = args->dst; @@ -1005,6 +1013,7 @@ static vm_fault_t dmirror_devmem_fault_alloc_and_copy(struct migrate_vma *args, continue; lock_page(dpage); + xa_erase(&dmirror->pt, addr >> PAGE_SHIFT); copy_highpage(dpage, spage); *dst = migrate_pfn(page_to_pfn(dpage)) | MIGRATE_PFN_LOCKED; if (*src & MIGRATE_PFN_WRITE) @@ -1013,15 +1022,6 @@ static vm_fault_t dmirror_devmem_fault_alloc_and_copy(struct migrate_vma *args, return 0; } -static void dmirror_devmem_fault_finalize_and_map(struct migrate_vma *args, - struct dmirror *dmirror) -{ - /* Invalidate the device's page table mapping. */ - mutex_lock(&dmirror->mutex); - dmirror_do_update(dmirror, args->start, args->end); - mutex_unlock(&dmirror->mutex); -} - static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf) { struct migrate_vma args; @@ -1051,11 +1051,15 @@ static vm_fault_t dmirror_devmem_fault(struct vm_fault *vmf) if (migrate_vma_setup(&args)) return VM_FAULT_SIGBUS; - ret = dmirror_devmem_fault_alloc_and_copy(&args, dmirror->mdevice); + ret = dmirror_devmem_fault_alloc_and_copy(&args, dmirror); if (ret) return ret; migrate_vma_pages(&args); - dmirror_devmem_fault_finalize_and_map(&args, dmirror); + /* + * No device finalize step is needed since + * dmirror_devmem_fault_alloc_and_copy() will have already + * invalidated the device page table. + */ migrate_vma_finalize(&args); return 0; } diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm-tests.c index b533dd08da1d..91d38a29956b 100644 --- a/tools/testing/selftests/vm/hmm-tests.c +++ b/tools/testing/selftests/vm/hmm-tests.c @@ -881,8 +881,9 @@ TEST_F(hmm, migrate) } /* - * Migrate anonymous memory to device private memory and fault it back to system - * memory. + * Migrate anonymous memory to device private memory and fault some of it back + * to system memory, then try migrating the resulting mix of system and device + * private memory to the device. */ TEST_F(hmm, migrate_fault) { @@ -924,8 +925,17 @@ TEST_F(hmm, migrate_fault) for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i) ASSERT_EQ(ptr[i], i); - /* Fault pages back to system memory and check them. */ - for (i = 0, ptr = buffer->ptr; i < size / sizeof(*ptr); ++i) + /* Fault half the pages back to system memory and check them. */ + for (i = 0, ptr = buffer->ptr; i < size / (2 * sizeof(*ptr)); ++i) + ASSERT_EQ(ptr[i], i); + + /* Migrate memory to the device again. */ + ret = hmm_dmirror_cmd(self->fd, HMM_DMIRROR_MIGRATE, buffer, npages); + ASSERT_EQ(ret, 0); + ASSERT_EQ(buffer->cpages, npages); + + /* Check what the device read. */ + for (i = 0, ptr = buffer->mirror; i < size / sizeof(*ptr); ++i) ASSERT_EQ(ptr[i], i); hmm_buffer_free(buffer); From patchwork Thu Jul 23 22:30:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11681711 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7556F6C1 for ; Thu, 23 Jul 2020 22:30:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4B6A42080D for ; Thu, 23 Jul 2020 22:30:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B6A42080D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9CAEA8D0009; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 97AA28D000A; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 69EC48D0009; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0224.hostedemail.com [216.40.44.224]) by kanga.kvack.org (Postfix) with ESMTP id 4C55D8D0007 for ; Thu, 23 Jul 2020 18:30:53 -0400 (EDT) Received: from smtpin13.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 108901801E8FD for ; Thu, 23 Jul 2020 22:30:53 +0000 (UTC) X-FDA: 77070786786.13.quilt80_0b0d3ba26f42 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin13.hostedemail.com (Postfix) with ESMTP id DF4A918144D32 for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30054:30064:30070,0,RBL:216.228.121.64:@nvidia.com:.lbl8.mailshell.net-64.10.201.10 62.18.0.100;04y86sjtj4axrw1mdcpsoeqswpfutyp91if7orm4kmwg9bgbiu5ycqy5zqx4t61.r1xeinq3guge3dxomnjddjse3yt6oe5ahoksxprb5tnzfhirrixfbwefh3w6h8b.6-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:ft,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:24,LUA_SUMMARY:none X-HE-Tag: quilt80_0b0d3ba26f42 X-Filterd-Recvd-Size: 5009 Received: from hqnvemgate25.nvidia.com (hqnvemgate25.nvidia.com [216.228.121.64]) by imf14.hostedemail.com (Postfix) with ESMTP for ; Thu, 23 Jul 2020 22:30:52 +0000 (UTC) Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 Jul 2020 15:29:48 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 23 Jul 2020 15:30:51 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 23 Jul 2020 15:30:51 -0700 Received: from HQMAIL111.nvidia.com (172.20.187.18) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 Jul 2020 22:30:42 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL111.nvidia.com (172.20.187.18) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Thu, 23 Jul 2020 22:30:42 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Thu, 23 Jul 2020 15:30:42 -0700 From: Ralph Campbell To: , , , , , CC: Jerome Glisse , John Hubbard , Christoph Hellwig , Jason Gunthorpe , "Andrew Morton" , Shuah Khan , "Ben Skeggs" , Bharata B Rao , "Ralph Campbell" Subject: [PATCH v4 6/6] mm/migrate: remove range invalidation in migrate_vma_pages() Date: Thu, 23 Jul 2020 15:30:04 -0700 Message-ID: <20200723223004.9586-7-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200723223004.9586-1-rcampbell@nvidia.com> References: <20200723223004.9586-1-rcampbell@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Rspamd-Queue-Id: DF4A918144D32 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When migrating the special zero page, migrate_vma_pages() calls mmu_notifier_invalidate_range_start() before replacing the zero page PFN in the CPU page tables. This is unnecessary since the range was invalidated in migrate_vma_setup() and the page table entry is checked to be sure it hasn't changed between migrate_vma_setup() and migrate_vma_pages(). Therefore, remove the redundant invalidation. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t95543388; bh=Y8qnSzc0udfc4m+P6cziRmRJk5XEGcgDU5ImloLrCuE=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=rIyLVqKU1Kxf67Qz9TIZ2f1lAaP7YxvFgCZR8v0Vw1fwq7aUbMbgfzcF0bd6+XzG6 ZHtBRMp/Zu/ZLGRxP6lBqZo4wHMHbuW3fXOvPCrYTD5YsCCLv+Ao4RmreWyec2wBTk uBo3ZylCHJ0ckD85BcjQQxpXyY99cBsvIomZw9wzg6QGm7Ksbq6d+UKSkb0L04d6v8 fiRvvLNq3kCbPzrifaBTj3klQcVcKXz34km0XUoRQlSaftlq4BJWopBPX8U7gQtstO OvA7Al9t87sCpKjSnqjE7N1jThU0KzjPrCxJiEHq/0Vf4sqeUA42bOkc+bk/CV1ZSF n9jm36j4kRTUg= Signed-off-by: Ralph Campbell --- mm/migrate.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 96e1f41a991e..36076ba2f51a 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2877,9 +2877,7 @@ void migrate_vma_pages(struct migrate_vma *migrate) { const unsigned long npages = migrate->npages; const unsigned long start = migrate->start; - struct mmu_notifier_range range; unsigned long addr, i; - bool notified = false; for (i = 0, addr = start; i < npages; addr += PAGE_SIZE, i++) { struct page *newpage = migrate_pfn_to_page(migrate->dst[i]); @@ -2895,16 +2893,6 @@ void migrate_vma_pages(struct migrate_vma *migrate) if (!page) { if (!(migrate->src[i] & MIGRATE_PFN_MIGRATE)) continue; - if (!notified) { - notified = true; - - mmu_notifier_range_init(&range, - MMU_NOTIFY_CLEAR, 0, - NULL, - migrate->vma->vm_mm, - addr, migrate->end); - mmu_notifier_invalidate_range_start(&range); - } migrate_vma_insert_page(migrate, addr, newpage, &migrate->src[i], &migrate->dst[i]); @@ -2937,14 +2925,6 @@ void migrate_vma_pages(struct migrate_vma *migrate) if (r != MIGRATEPAGE_SUCCESS) migrate->src[i] &= ~MIGRATE_PFN_MIGRATE; } - - /* - * No need to double call mmu_notifier->invalidate_range() callback as - * the above ptep_clear_flush_notify() inside migrate_vma_insert_page() - * did already call it. - */ - if (notified) - mmu_notifier_invalidate_range_only_end(&range); } EXPORT_SYMBOL(migrate_vma_pages);