From patchwork Mon Jul 6 22:23:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ralph Campbell X-Patchwork-Id: 11647001 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 DD60213BD for ; Mon, 6 Jul 2020 22:24:09 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A8F3820739 for ; Mon, 6 Jul 2020 22:24:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="IZZvz7M0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A8F3820739 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 ACB476B0023; Mon, 6 Jul 2020 18:24:06 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 905F46B0026; Mon, 6 Jul 2020 18:24:06 -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 77FBE6B0024; Mon, 6 Jul 2020 18:24:06 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0091.hostedemail.com [216.40.44.91]) by kanga.kvack.org (Postfix) with ESMTP id 522876B0022 for ; Mon, 6 Jul 2020 18:24:06 -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 E8D73181AEF07 for ; Mon, 6 Jul 2020 22:24:05 +0000 (UTC) X-FDA: 77009080050.11.money83_170950c26eaf Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin11.hostedemail.com (Postfix) with ESMTP id BC2E5180F8B81 for ; Mon, 6 Jul 2020 22:24:05 +0000 (UTC) X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,rcampbell@nvidia.com,,RULES_HIT:30054:30064:30070:30090,0,RBL:216.228.121.143:@nvidia.com:.lbl8.mailshell.net-64.10.201.10 62.18.0.100;04yrugkirwzkupmcaio399n4ggkbhoco1qw9yw3rzrhmq77ky3h3zpqie9rthzm.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:24,LUA_SUMMARY:none X-HE-Tag: money83_170950c26eaf X-Filterd-Recvd-Size: 4889 Received: from hqnvemgate24.nvidia.com (hqnvemgate24.nvidia.com [216.228.121.143]) by imf10.hostedemail.com (Postfix) with ESMTP for ; Mon, 6 Jul 2020 22:24:05 +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 ; Mon, 06 Jul 2020 15:22:18 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 06 Jul 2020 15:24:03 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 06 Jul 2020 15:24:03 -0700 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 6 Jul 2020 22:23:58 +0000 Received: from hqnvemgw03.nvidia.com (10.124.88.68) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 6 Jul 2020 22:23:58 +0000 Received: from rcampbell-dev.nvidia.com (Not Verified[10.110.48.66]) by hqnvemgw03.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 06 Jul 2020 15:23:58 -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 1/5] nouveau: fix storing invalid ptes Date: Mon, 6 Jul 2020 15:23:43 -0700 Message-ID: <20200706222347.32290-2-rcampbell@nvidia.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200706222347.32290-1-rcampbell@nvidia.com> References: <20200706222347.32290-1-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=1594074138; 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=IZZvz7M0aehsq4GUCeVSFHS5wuzXzoEtv2WjRoeFwC23ch46wFYGTKQIWv1KbV6A8 7vVcF9CK083zwalIbf/GYj2zA4wBdoLTYu3EjKLSiTlzGFYUkbHlh/QQ5s12Bl0UUD nj8P3hYHt47wNrW+8v3BsvsP1GMaWGsl/1vjEFXXeojiQZ6pg8PkU7rLRsmJibD+fn zAg7bX0+NoF6JwNrzrsQ3ihNZ/rYOa4UuV5EN7ZdOIIfkzIcfn3b6K4JyXQ/vBs1PR 9NeYULWMvJW1fdUOcfq6SDXBfUHWY+XKJg0KExceRfg814jCXtdVkdB3aO3QuA1eGR E3Ff+WkJ/O0Ew== X-Rspamd-Queue-Id: BC2E5180F8B81 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 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); }