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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D92DC433FE for ; Wed, 19 Oct 2022 09:23:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233460AbiJSJXB (ORCPT ); Wed, 19 Oct 2022 05:23:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54900 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232882AbiJSJV7 (ORCPT ); Wed, 19 Oct 2022 05:21:59 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E32372B66; Wed, 19 Oct 2022 02:10:06 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 511C3617F1; Wed, 19 Oct 2022 09:07:48 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C4F7C433D7; Wed, 19 Oct 2022 09:07:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666170467; bh=RGwrKnkrt+w/nHMKlIsALNrzbvtZrXpoRBaBl2bJTIg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xjJO+cO7V57mrH7uRl65DC+/Grj18uQxhZuHe8En9ynIYR/06cSjgQWBPhS63aVo0 awlksJ1Tr23IOEfUsiWl6iGSvkmf0saegBWu/TaVzeR+4qxa2Tg5L4YgJrrjO1FAb6 kUVWVzm8kxQM8L0rEnByeb9JcT8xxYVjfZH2Q0aI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Kunkun Jiang , Marc Zyngier , Oliver Upton , Daniel Lezcano , Sasha Levin Subject: [PATCH 6.0 639/862] clocksource/drivers/arm_arch_timer: Fix handling of ARM erratum 858921 Date: Wed, 19 Oct 2022 10:32:06 +0200 Message-Id: <20221019083318.160511306@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kunkun Jiang [ Upstream commit 6c3b62d93e195f78c1437c8fa7581e9b2f00886e ] The commit a38b71b0833e ("clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL") moves the programming of the timers from the countdown timer (TVAL) over to the comparator (CVAL). This makes it necessary to read the counter when programming next event. However, the workaround of Cortex-A73 erratum 858921 does not set the corresponding set_next_event_phys and set_next_event_virt. Add the appropriate hooks to apply the erratum mitigation when programming the next timer event. Fixes: a38b71b0833e ("clocksource/drivers/arm_arch_timer: Move system register timer programming over to CVAL") Signed-off-by: Kunkun Jiang Acked-by: Marc Zyngier Reviewed-by: Oliver Upton Link: https://lore.kernel.org/r/20220914061424.1260-1-jiangkunkun@huawei.com Signed-off-by: Daniel Lezcano Signed-off-by: Sasha Levin --- drivers/clocksource/arm_arch_timer.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c index 8122a1646925..a7ff77550e17 100644 --- a/drivers/clocksource/arm_arch_timer.c +++ b/drivers/clocksource/arm_arch_timer.c @@ -473,6 +473,8 @@ static const struct arch_timer_erratum_workaround ool_workarounds[] = { .desc = "ARM erratum 858921", .read_cntpct_el0 = arm64_858921_read_cntpct_el0, .read_cntvct_el0 = arm64_858921_read_cntvct_el0, + .set_next_event_phys = erratum_set_next_event_phys, + .set_next_event_virt = erratum_set_next_event_virt, }, #endif #ifdef CONFIG_SUN50I_ERRATUM_UNKNOWN1 -- 2.35.1