From patchwork Fri Sep 6 05:16:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Tokarev X-Patchwork-Id: 13793272 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8FF28C54FC6 for ; Fri, 6 Sep 2024 05:21:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1smRPJ-0008Vj-PM; Fri, 06 Sep 2024 01:21:19 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smROY-000577-CZ; Fri, 06 Sep 2024 01:20:30 -0400 Received: from isrv.corpit.ru ([86.62.121.231]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1smROV-0000CM-AK; Fri, 06 Sep 2024 01:20:29 -0400 Received: from tsrv.corpit.ru (tsrv.tls.msk.ru [192.168.177.2]) by isrv.corpit.ru (Postfix) with ESMTP id ADD208C13D; Fri, 6 Sep 2024 08:15:18 +0300 (MSK) Received: from tls.msk.ru (mjt.wg.tls.msk.ru [192.168.177.130]) by tsrv.corpit.ru (Postfix) with SMTP id 5E5A0133382; Fri, 6 Sep 2024 08:16:36 +0300 (MSK) Received: (nullmailer pid 10508 invoked by uid 1000); Fri, 06 Sep 2024 05:16:34 -0000 From: Michael Tokarev To: qemu-devel@nongnu.org Cc: qemu-stable@nongnu.org, Jianzhou Yue , Peter Maydell , Michael Tokarev Subject: [Stable-7.2.14 40/40] hw/core/ptimer: fix timer zero period condition for freq > 1GHz Date: Fri, 6 Sep 2024 08:16:28 +0300 Message-Id: <20240906051633.10288-40-mjt@tls.msk.ru> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=86.62.121.231; envelope-from=mjt@tls.msk.ru; helo=isrv.corpit.ru X-Spam_score_int: -68 X-Spam_score: -6.9 X-Spam_bar: ------ X-Spam_report: (-6.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Jianzhou Yue The real period is zero when both period and period_frac are zero. Check the method ptimer_set_freq, if freq is larger than 1000 MHz, the period is zero, but the period_frac is not, in this case, the ptimer will work but the current code incorrectly recognizes that the ptimer is disabled. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2306 Signed-off-by: JianZhou Yue Message-id: 3DA024AEA8B57545AF1B3CAA37077D0FB75E82C8@SHASXM03.verisilicon.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell (cherry picked from commit 446e5e8b4515e9a7be69ef6a29852975289bb6f0) Signed-off-by: Michael Tokarev diff --git a/hw/core/ptimer.c b/hw/core/ptimer.c index eb5ba1aff7..f1f8109385 100644 --- a/hw/core/ptimer.c +++ b/hw/core/ptimer.c @@ -83,7 +83,7 @@ static void ptimer_reload(ptimer_state *s, int delta_adjust) delta = s->delta = s->limit; } - if (s->period == 0) { + if (s->period == 0 && s->period_frac == 0) { if (!qtest_enabled()) { fprintf(stderr, "Timer with period zero, disabling\n"); } @@ -309,7 +309,7 @@ void ptimer_run(ptimer_state *s, int oneshot) assert(s->in_transaction); - if (was_disabled && s->period == 0) { + if (was_disabled && s->period == 0 && s->period_frac == 0) { if (!qtest_enabled()) { fprintf(stderr, "Timer with period zero, disabling\n"); } diff --git a/tests/unit/ptimer-test.c b/tests/unit/ptimer-test.c index 04b5f4e3d0..08240594bb 100644 --- a/tests/unit/ptimer-test.c +++ b/tests/unit/ptimer-test.c @@ -763,6 +763,33 @@ static void check_oneshot_with_load_0(gconstpointer arg) ptimer_free(ptimer); } +static void check_freq_more_than_1000M(gconstpointer arg) +{ + const uint8_t *policy = arg; + ptimer_state *ptimer = ptimer_init(ptimer_trigger, NULL, *policy); + bool no_round_down = (*policy & PTIMER_POLICY_NO_COUNTER_ROUND_DOWN); + + triggered = false; + + ptimer_transaction_begin(ptimer); + ptimer_set_freq(ptimer, 2000000000); + ptimer_set_limit(ptimer, 8, 1); + ptimer_run(ptimer, 1); + ptimer_transaction_commit(ptimer); + + qemu_clock_step(3); + + g_assert_cmpuint(ptimer_get_count(ptimer), ==, no_round_down ? 3 : 2); + g_assert_false(triggered); + + qemu_clock_step(1); + + g_assert_cmpuint(ptimer_get_count(ptimer), ==, 0); + g_assert_true(triggered); + + ptimer_free(ptimer); +} + static void add_ptimer_tests(uint8_t policy) { char policy_name[256] = ""; @@ -857,6 +884,12 @@ static void add_ptimer_tests(uint8_t policy) policy_name), g_memdup2(&policy, 1), check_oneshot_with_load_0, g_free); g_free(tmp); + + g_test_add_data_func_full( + tmp = g_strdup_printf("/ptimer/freq_more_than_1000M policy=%s", + policy_name), + g_memdup2(&policy, 1), check_freq_more_than_1000M, g_free); + g_free(tmp); } static void add_all_ptimer_policies_comb_tests(void)