From patchwork Mon Aug 17 03:37:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhukeqian X-Patchwork-Id: 11716389 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 317A6618 for ; Mon, 17 Aug 2020 03:38:48 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 0B4DF205CB for ; Mon, 17 Aug 2020 03:38:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mrZcGT2m" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0B4DF205CB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7i0cDgVt0/scCBsfaQ4foIbJdWIQHqy6ai6uaXk51m0=; b=mrZcGT2mm3OyAb43YIglKlD7c a5lVqMFvqLRAleda+xEZoVUi5ODOsV1sMTKH20Zqom5Iknfmar6lZ94m68DOIGmqagv5I3dwLmzvA ZoIh45grxbv4+xvaRSz/YgTFA42zC2HtGKds7zdRpXlmAlQZgkWFr3lLwI76MXz2PLDljVlrJuciN l2gm92/ZAowoqFD9tLEc4dx5WgbbVMiBy1T8AxYVcQXnFaG1iVgpN3AS28LrxvcnCfYEj1noUvSjV 8ZUgODsvNxpYK9u7EhWRnSKjANz6nP/DpeN6mgQ7Eg5d6eF1H2/3NSib/IEg3Yq7lrjJ2/iVF+JLR 2S+SL7Z+A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7Vyl-0002wH-1B; Mon, 17 Aug 2020 03:38:35 +0000 Received: from szxga07-in.huawei.com ([45.249.212.35] helo=huawei.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7Vyf-0002sV-UT for linux-arm-kernel@lists.infradead.org; Mon, 17 Aug 2020 03:38:31 +0000 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 5A30889994A65CB4171F; Mon, 17 Aug 2020 11:38:18 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.22) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Mon, 17 Aug 2020 11:38:07 +0800 From: Keqian Zhu To: , , , Subject: [PATCH 3/3] KVM: arm64: Use kvm_write_guest_lock when init stolen time Date: Mon, 17 Aug 2020 11:37:29 +0800 Message-ID: <20200817033729.10848-4-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20200817033729.10848-1-zhukeqian1@huawei.com> References: <20200817033729.10848-1-zhukeqian1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.22] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200816_233830_301334_29EC5603 X-CRM114-Status: UNSURE ( 9.70 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [45.249.212.35 listed in list.dnswl.org] -0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [45.249.212.35 listed in wl.mailspike.net] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Suzuki K Poulose , Marc Zyngier , Keqian Zhu , Steven Price , James Morse , Catalin Marinas , wanghaibin.wang@huawei.com, Will Deacon Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org There is a lock version kvm_write_guest. Use it to simplify code. Signed-off-by: Keqian Zhu Reviewed-by: Andrew Jones Reviewed-by: Steven Price --- arch/arm64/kvm/pvtime.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c index f7b52ce..2b24e7f 100644 --- a/arch/arm64/kvm/pvtime.c +++ b/arch/arm64/kvm/pvtime.c @@ -55,7 +55,6 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu) struct pvclock_vcpu_stolen_time init_values = {}; struct kvm *kvm = vcpu->kvm; u64 base = vcpu->arch.steal.base; - int idx; if (base == GPA_INVALID) return base; @@ -66,10 +65,7 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu) */ vcpu->arch.steal.steal = 0; vcpu->arch.steal.last_steal = current->sched_info.run_delay; - - idx = srcu_read_lock(&kvm->srcu); - kvm_write_guest(kvm, base, &init_values, sizeof(init_values)); - srcu_read_unlock(&kvm->srcu, idx); + kvm_write_guest_lock(kvm, base, &init_values, sizeof(init_values)); return base; }