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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 4D36AC433E4 for ; Fri, 24 Jul 2020 11:54:10 +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 2AB43206E3 for ; Fri, 24 Jul 2020 11:54:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2AB43206E3 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=chris-wilson.co.uk Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7549C6E956; Fri, 24 Jul 2020 11:54:08 +0000 (UTC) Received: from fireflyinternet.com (unknown [77.68.26.236]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6B5236E0E0 for ; Fri, 24 Jul 2020 11:54:06 +0000 (UTC) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=78.156.65.138; Received: from build.alporthouse.com (unverified [78.156.65.138]) by fireflyinternet.com (Firefly Internet (M1)) with ESMTP id 21918181-1500050 for multiple; Fri, 24 Jul 2020 12:53:54 +0100 From: Chris Wilson To: intel-gfx@lists.freedesktop.org Date: Fri, 24 Jul 2020 12:53:52 +0100 Message-Id: <20200724115352.19892-3-chris@chris-wilson.co.uk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200724115352.19892-1-chris@chris-wilson.co.uk> References: <20200724115352.19892-1-chris@chris-wilson.co.uk> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 3/3] drm/i915/selftests: Add compiler paranoia for checking HWSP values 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: , Cc: Chris Wilson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Since we want to read the values from the HWSP as written to by the GPU, warn the compiler that the values are volatile. Signed-off-by: Chris Wilson Cc: Mika Kuoppala --- drivers/gpu/drm/i915/gt/selftest_timeline.c | 23 +++++++++++---------- 1 file changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c index fb5b7d3498a6..1203b7460557 100644 --- a/drivers/gpu/drm/i915/gt/selftest_timeline.c +++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c @@ -491,7 +491,7 @@ checked_intel_timeline_create(struct intel_gt *gt) if (IS_ERR(tl)) return tl; - if (*tl->hwsp_seqno != tl->seqno) { + if (READ_ONCE(*tl->hwsp_seqno) != tl->seqno) { pr_err("Timeline created with incorrect breadcrumb, found %x, expected %x\n", *tl->hwsp_seqno, tl->seqno); intel_timeline_put(tl); @@ -561,9 +561,9 @@ static int live_hwsp_engine(void *arg) for (n = 0; n < count; n++) { struct intel_timeline *tl = timelines[n]; - if (!err && *tl->hwsp_seqno != n) { - pr_err("Invalid seqno stored in timeline %lu @ %x, found 0x%x\n", - n, tl->hwsp_offset, *tl->hwsp_seqno); + if (!err && READ_ONCE(*tl->hwsp_seqno) != n) { + GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x, found 0x%x\n", + n, tl->fence_context, tl->hwsp_offset, *tl->hwsp_seqno); GEM_TRACE_DUMP(); err = -EINVAL; } @@ -633,9 +633,9 @@ static int live_hwsp_alternate(void *arg) for (n = 0; n < count; n++) { struct intel_timeline *tl = timelines[n]; - if (!err && *tl->hwsp_seqno != n) { - pr_err("Invalid seqno stored in timeline %lu @ %x, found 0x%x\n", - n, tl->hwsp_offset, *tl->hwsp_seqno); + if (!err && READ_ONCE(*tl->hwsp_seqno) != n) { + GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x, found 0x%x\n", + n, tl->fence_context, tl->hwsp_offset, *tl->hwsp_seqno); GEM_TRACE_DUMP(); err = -EINVAL; } @@ -733,7 +733,8 @@ static int live_hwsp_wrap(void *arg) goto out; } - if (*hwsp_seqno[0] != seqno[0] || *hwsp_seqno[1] != seqno[1]) { + if (READ_ONCE(*hwsp_seqno[0]) != seqno[0] || + READ_ONCE(*hwsp_seqno[1]) != seqno[1]) { pr_err("Bad timeline values: found (%x, %x), expected (%x, %x)\n", *hwsp_seqno[0], *hwsp_seqno[1], seqno[0], seqno[1]); @@ -966,9 +967,9 @@ static int live_hwsp_recycle(void *arg) break; } - if (*tl->hwsp_seqno != count) { - pr_err("Invalid seqno stored in timeline %lu @ tl->hwsp_offset, found 0x%x\n", - count, *tl->hwsp_seqno); + if (READ_ONCE(*tl->hwsp_seqno) != count) { + GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x found 0x%x\n", + count, tl->fence_context, tl->hwsp_offset, *tl->hwsp_seqno); GEM_TRACE_DUMP(); err = -EINVAL; } -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx