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: 11718021 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 998BF138C for ; Mon, 17 Aug 2020 11:08:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 890342072D for ; Mon, 17 Aug 2020 11:08:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727021AbgHQLIH (ORCPT ); Mon, 17 Aug 2020 07:08:07 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:9746 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726612AbgHQLIF (ORCPT ); Mon, 17 Aug 2020 07:08:05 -0400 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: , , , CC: Marc Zyngier , Steven Price , "Andrew Jones" , Catalin Marinas , "Will Deacon" , James Morse , Suzuki K Poulose , , Keqian Zhu 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 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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: 11718031 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 42B22138C for ; Mon, 17 Aug 2020 11:09:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35F4A20738 for ; Mon, 17 Aug 2020 11:09:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727809AbgHQLIL (ORCPT ); Mon, 17 Aug 2020 07:08:11 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:9747 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726403AbgHQLIG (ORCPT ); Mon, 17 Aug 2020 07:08:06 -0400 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: , , , CC: Marc Zyngier , Steven Price , "Andrew Jones" , Catalin Marinas , "Will Deacon" , James Morse , Suzuki K Poulose , , Keqian Zhu 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 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.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; }