From patchwork Fri Aug 13 20:30:26 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12436123 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 5CDE5C432BE for ; Fri, 13 Aug 2021 20:31:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2992860560 for ; Fri, 13 Aug 2021 20:31:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2992860560 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ffwll.ch Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F1B706E8E2; Fri, 13 Aug 2021 20:30:49 +0000 (UTC) Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by gabe.freedesktop.org (Postfix) with ESMTPS id EF0846E8D8 for ; Fri, 13 Aug 2021 20:30:45 +0000 (UTC) Received: by mail-ej1-x629.google.com with SMTP id bt14so4633091ejb.3 for ; Fri, 13 Aug 2021 13:30:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=OLapkgrouu6XaESfbyHy/JJUr4UWMSd5aiOH2DnBwAQ=; b=Fbg2RVYyByvFDn8OFY8/N9A+jK5dp4VF2+5pBXGZw0jB3mdnzBwTDHoyoU4PNzTiyV +tEMEZPa0M6SfkjqupRjpMmWfk0opiRU+/Y/SOCVPTdwV1F3JzTTzuQrwiZucEgcEV3J FQdbSf+PkNqYHGxWM3pltzzafw6QsuPkLOlf4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OLapkgrouu6XaESfbyHy/JJUr4UWMSd5aiOH2DnBwAQ=; b=VmKXmzOIc2yy7MysWpfbdeXdcntQbhz+2ZER+VJnbcewAvg75BbhOtoxV2ESUc/TQ3 OW3cFLOtd3zgRLGBa2I5eHR3v0JVF6ouvAp6eBfSmogFEX+u4sAgUzBGjOfAcz0IMfM+ 5q+hBBG5YGiI6QaraVq7uiL/6VJNJsdk8avJUWowyhbZb62yTnQJNrpb124RAcq3OhIC n1UVEdEQc2KmHEiC8WV8WiqkHJqzsQGQIf9VrMxog9Om5We6/Sqp5nRFaIW+eUvEoq3m T8AnnN0Ii73G8yVL9cQpuk1wvE57UmLs9sGsAdcuXWsal6Kt7U9OsPv3oVvKVP/afQpW a16Q== X-Gm-Message-State: AOAM530LK6LU05ThveIkcsOFYmIWg8eD+M51oixMWE9c/F41pc+pd7iB PQOMFSraqLZcDwybP9gj9HV2qQ== X-Google-Smtp-Source: ABdhPJxJJf2HJ5EDQPO8aTAM0LBHYuMbe+J1b+lLLRf/Mk/r+FlpIYV2iYqZaZFo72aF+Vo7Xnmp6g== X-Received: by 2002:a17:906:40d1:: with SMTP id a17mr4266373ejk.503.1628886643663; Fri, 13 Aug 2021 13:30:43 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id y17sm1347027edv.51.2021.08.13.13.30.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Aug 2021 13:30:43 -0700 (PDT) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , Daniel Vetter , Daniel Vetter , Jon Bloomfield , Chris Wilson , Maarten Lankhorst , Joonas Lahtinen , =?utf-8?q?Thomas_Hellstr?= =?utf-8?q?=C3=B6m?= , Matthew Auld , Lionel Landwerlin , Dave Airlie , Jason Ekstrand Date: Fri, 13 Aug 2021 22:30:26 +0200 Message-Id: <20210813203033.3179400-4-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210813203033.3179400-1-daniel.vetter@ffwll.ch> References: <20210813203033.3179400-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 04/11] drm/i915: Drop code to handle set-vm races from execbuf X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Changing the vm from a finalized gem ctx is no longer possible, which means we don't have to check for that anymore. I was pondering whether to keep the check as a WARN_ON, but things go boom real bad real fast if the vm of a vma is wrong. Plus we'd need to also get the ggtt vm for !full-ppgtt platforms. Ditching it all seemed like a better idea. References: ccbc1b97948a ("drm/i915/gem: Don't allow changing the VM on running contexts (v4)") Signed-off-by: Daniel Vetter Cc: Jon Bloomfield Cc: Chris Wilson Cc: Maarten Lankhorst Cc: Joonas Lahtinen Cc: Daniel Vetter Cc: "Thomas Hellström" Cc: Matthew Auld Cc: Lionel Landwerlin Cc: Dave Airlie Cc: Jason Ekstrand --- drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c index e809aca00f72..905b1cbd22d5 100644 --- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c +++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c @@ -775,11 +775,7 @@ static int __eb_add_lut(struct i915_execbuffer *eb, /* Check that the context hasn't been closed in the meantime */ err = -EINTR; if (!mutex_lock_interruptible(&ctx->lut_mutex)) { - struct i915_address_space *vm = rcu_access_pointer(ctx->vm); - - if (unlikely(vm && vma->vm != vm)) - err = -EAGAIN; /* user racing with ctx set-vm */ - else if (likely(!i915_gem_context_is_closed(ctx))) + if (likely(!i915_gem_context_is_closed(ctx))) err = radix_tree_insert(&ctx->handles_vma, handle, vma); else err = -ENOENT;