From patchwork Mon Aug 17 11:07:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhukeqian X-Patchwork-Id: 11718025 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 190351392 for ; Mon, 17 Aug 2020 11:08:28 +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 E604E2067C for ; Mon, 17 Aug 2020 11:08:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ENrfODOo" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E604E2067C 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=3UJxeRTF6y4xc0oZj/6fRPrzRN5nK2260TWejypiq4w=; b=ENrfODOo1Zhz3A0+wFU3o3Ih9 WVakD0IvlpDEC/PAhhfZH+AKbI5wKGvakwhb1w8CfaZ3ZA6HsTeA1MEzS/kUsJbAw8882sPIIqFt2 lyO8Hal/WlIQUjlwdnj3e4kr/MTcdSNllw1xw7YJu1a9sz368C1vpGoC7UWsopHPImzcAHvu/3wtX Qrd7p8+mvoorEAsNNkt8yyBUfP75vryVoTxErTIMwzY4G4vqB6OEKR3mVK6TRO/Ekobtp8jEbZLfx TdXobSS9CjdV7L7nKZJQVr21ARrODl5Hn4nq2Cdf6Sxs6/AoXHEcdxO5aD880+viRpwzSjN/l2veJ rAyppApRw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7czv-0006wp-6z; Mon, 17 Aug 2020 11:08:15 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7czn-0006uF-93 for linux-arm-kernel@lists.infradead.org; Mon, 17 Aug 2020 11:08:09 +0000 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id DFFEC183E6E7D710B54F; Mon, 17 Aug 2020 19:08:00 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.22) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Mon, 17 Aug 2020 19:07:51 +0800 From: Keqian Zhu To: , , , Subject: [PATCH v2 1/2] KVM: arm64: Some fixes of PV-time interface document Date: Mon, 17 Aug 2020 19:07:27 +0800 Message-ID: <20200817110728.12196-2-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20200817110728.12196-1-zhukeqian1@huawei.com> References: <20200817110728.12196-1-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-20200817_070807_599867_DE909C9D X-CRM114-Status: UNSURE ( 8.83 ) 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 [45.249.212.191 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [45.249.212.191 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: Andrew Jones , 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 Rename PV_FEATURES to PV_TIME_FEATURES. Signed-off-by: Keqian Zhu Reviewed-by: Andrew Jones Reviewed-by: Steven Price --- Documentation/virt/kvm/arm/pvtime.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/Documentation/virt/kvm/arm/pvtime.rst b/Documentation/virt/kvm/arm/pvtime.rst index 687b60d..94bffe2 100644 --- a/Documentation/virt/kvm/arm/pvtime.rst +++ b/Documentation/virt/kvm/arm/pvtime.rst @@ -3,7 +3,7 @@ Paravirtualized time support for arm64 ====================================== -Arm specification DEN0057/A defines a standard for paravirtualised time +Arm specification DEN0057/A defines a standard for paravirtualized time support for AArch64 guests: https://developer.arm.com/docs/den0057/a @@ -19,8 +19,8 @@ Two new SMCCC compatible hypercalls are defined: These are only available in the SMC64/HVC64 calling convention as paravirtualized time is not available to 32 bit Arm guests. The existence of -the PV_FEATURES hypercall should be probed using the SMCCC 1.1 ARCH_FEATURES -mechanism before calling it. +the PV_TIME_FEATURES hypercall should be probed using the SMCCC 1.1 +ARCH_FEATURES mechanism before calling it. PV_TIME_FEATURES ============= ======== ========== From patchwork Mon Aug 17 11:07:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhukeqian X-Patchwork-Id: 11718027 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 19B76138C for ; Mon, 17 Aug 2020 11:08:29 +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 E7A1F2067C for ; Mon, 17 Aug 2020 11:08:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="xP34b5H0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E7A1F2067C 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=ytogayGz4N8m23pOdqJd7hBSRmVh5SbSK+xcVgD1OTM=; b=xP34b5H0ami7/bS6hjU7EwiVC 0BnLD7l790I30MXjqFYXsc4FlWEcW33jXxTSWiH15ueUjpugT7NHbVWuB8wegGIXvRwk3Bf28aaKI eQGXqbEz2gzXnXcSoqdhtqySEnjru8tYmryIESgaCDizmfm6Ui90eHmdSPLSWhC4Gy7GyFwRfXrM7 msNllTiBmOSLWyej/rrklYP31SD4J53V629StuTKLhAf5GQAXAhknaxAlBhXir+VMOFaPwuL+0hGc RaRGHdpS1Zz0a/JTXl+jcmSs2Uc0K+9/QnMU/zrHdNzpIvh3zYOPO8d4yVro/kxqYPlg3n1VzID8b qggLmZgRQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7czq-0006vx-5N; Mon, 17 Aug 2020 11:08:10 +0000 Received: from szxga05-in.huawei.com ([45.249.212.191] helo=huawei.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1k7czn-0006uB-5v for linux-arm-kernel@lists.infradead.org; Mon, 17 Aug 2020 11:08:08 +0000 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id E80D389EC9CBD5A5F5F1; Mon, 17 Aug 2020 19:08:00 +0800 (CST) Received: from DESKTOP-5IS4806.china.huawei.com (10.174.187.22) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Mon, 17 Aug 2020 19:07:51 +0800 From: Keqian Zhu To: , , , Subject: [PATCH v2 2/2] KVM: arm64: Use kvm_write_guest_lock when init stolen time Date: Mon, 17 Aug 2020 19:07:28 +0800 Message-ID: <20200817110728.12196-3-zhukeqian1@huawei.com> X-Mailer: git-send-email 2.8.4.windows.1 In-Reply-To: <20200817110728.12196-1-zhukeqian1@huawei.com> References: <20200817110728.12196-1-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-20200817_070807_474652_CD7381A3 X-CRM114-Status: UNSURE ( 9.48 ) 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 [45.249.212.191 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [45.249.212.191 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: Andrew Jones , 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; }