From patchwork Mon Jan 29 10:40:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mihai Carabas X-Patchwork-Id: 13535474 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 C59ADC47DDB for ; Mon, 29 Jan 2024 11:56:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; 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Mon, 29 Jan 2024 11:55:54 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3vvr9bhcwx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 29 Jan 2024 11:55:54 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 40TBtniA038181; Mon, 29 Jan 2024 11:55:53 GMT Received: from mihai.localdomain (ban25x6uut25.us.oracle.com [10.153.73.25]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3vvr9bhcty-4; Mon, 29 Jan 2024 11:55:53 +0000 From: Mihai Carabas To: linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, pbonzini@redhat.com, wanpengli@tencent.com, vkuznets@redhat.com, rafael@kernel.org, daniel.lezcano@linaro.org, akpm@linux-foundation.org, pmladek@suse.com, peterz@infradead.org, dianders@chromium.org, npiggin@gmail.com, rick.p.edgecombe@intel.com, joao.m.martins@oracle.com, juerg.haefliger@canonical.com, mic@digikod.net, mihai.carabas@oracle.com, arnd@arndb.de, ankur.a.arora@oracle.com Subject: [PATCH v3 3/7] governors/haltpoll: Drop kvm_para_available() check Date: Mon, 29 Jan 2024 12:40:30 +0200 Message-Id: <1706524834-11275-4-git-send-email-mihai.carabas@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1706524834-11275-1-git-send-email-mihai.carabas@oracle.com> References: <1706524834-11275-1-git-send-email-mihai.carabas@oracle.com> X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-29_06,2024-01-29_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 bulkscore=0 spamscore=0 phishscore=0 adultscore=0 mlxlogscore=999 suspectscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401290086 X-Proofpoint-GUID: sMWD6riPKGFyMhV-2WyYkmbDKSMPpW5R X-Proofpoint-ORIG-GUID: sMWD6riPKGFyMhV-2WyYkmbDKSMPpW5R X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240129_035621_953631_D0FDE0DB X-CRM114-Status: GOOD ( 17.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Joao Martins This is duplicated already in the haltpoll idle driver, and there's no need to re-check KVM guest availability in the governor. Either guests uses the module which explicitly selects this governor, and given that it has the lowest rating of all governors (menu=20,teo=19,ladder=10/25,haltpoll=9) means that unless it's the only one compiled in, it won't be selected. Dropping such check also allows to test haltpoll in baremetal. Signed-off-by: Joao Martins Signed-off-by: Mihai Carabas Acked-by: Rafael J. Wysocki --- drivers/cpuidle/governors/haltpoll.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/drivers/cpuidle/governors/haltpoll.c b/drivers/cpuidle/governors/haltpoll.c index 1dff3a52917d..c9b69651d377 100644 --- a/drivers/cpuidle/governors/haltpoll.c +++ b/drivers/cpuidle/governors/haltpoll.c @@ -143,10 +143,7 @@ static int haltpoll_enable_device(struct cpuidle_driver *drv, static int __init init_haltpoll(void) { - if (kvm_para_available()) - return cpuidle_register_governor(&haltpoll_governor); - - return 0; + return cpuidle_register_governor(&haltpoll_governor); } postcore_initcall(init_haltpoll);