From patchwork Sun May 25 18:18:54 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoffer Dall X-Patchwork-Id: 4238911 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id E7EA3BF90B for ; Sun, 25 May 2014 18:23:29 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1CDAA201DE for ; Sun, 25 May 2014 18:23:29 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 369CE20179 for ; Sun, 25 May 2014 18:23:28 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wod2a-0006aY-Uk; Sun, 25 May 2014 18:21:00 +0000 Received: from mail-la0-f45.google.com ([209.85.215.45]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Wod1Q-0004oV-HU for linux-arm-kernel@lists.infradead.org; Sun, 25 May 2014 18:19:49 +0000 Received: by mail-la0-f45.google.com with SMTP id gl10so5352374lab.32 for ; Sun, 25 May 2014 11:19:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=EPN+oq0XlxAoIr2Ip0zjU/1mUGBPUT5SRUkcGWGYQYs=; b=KZNxoyK3+ejjMThmjc1j2sa/1g1ku/W4lsTwIkv8SdUIMca995Ddxbf4L98IN/8Nvf RlmA1FNERI8s11LvCgfrqZp9fV/3KsIbKWqPwkH6GIe49qQpqYuwOf3ftKRRIoAQGGwC rY6pD9QP2hR7o4mfocwCkMHfzzEppIolaDp4a+boDzLw7JS4DmCH2pvkBF1WuIaJvXt+ OvsFACPfCNQ7lYZIBN91J220aoBvGQND5uOaOmorI4W7sUNc9xGTLwL0mf0G5HEf38od M/kT8LF1Q7l5/Vq2rfF05fh22jo6Ml4d16qGxm2iEMeAt5kMeOZXZf7dbp1AV724/SYv kT+A== X-Gm-Message-State: ALoCoQlUe+0jAJL6uW5WFjjWmbYig+KHHQrUUij2NkZGVXbHkTdf4sMVRqlpFqBAOB/PUEPPdADW X-Received: by 10.152.4.39 with SMTP id h7mr13945131lah.12.1401041965682; Sun, 25 May 2014 11:19:25 -0700 (PDT) Received: from localhost.localdomain (x1-6-b8-c7-5d-cb-5a-ca.cpe.webspeed.dk. [2.104.6.253]) by mx.google.com with ESMTPSA id o1sm9683895lbw.27.2014.05.25.11.19.23 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 25 May 2014 11:19:24 -0700 (PDT) From: Christoffer Dall To: Paolo Bonzini , Gleb Natapov Subject: [PATCH 08/16] ARM/ARM64: KVM: Emulate PSCI v0.2 AFFINITY_INFO Date: Sun, 25 May 2014 20:18:54 +0200 Message-Id: <1401041942-23471-9-git-send-email-christoffer.dall@linaro.org> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1401041942-23471-1-git-send-email-christoffer.dall@linaro.org> References: <1401041942-23471-1-git-send-email-christoffer.dall@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140525_111948_793681_61911DA2 X-CRM114-Status: GOOD ( 16.50 ) X-Spam-Score: -0.7 (/) Cc: Peter Maydell , Anup Patel , kvm@vger.kernel.org, Marc Zyngier , Ashwin Chaugule , Christoffer Dall , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Pranavkumar Sawargaonkar X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Anup Patel This patch adds emulation of PSCI v0.2 AFFINITY_INFO function call for KVM ARM/ARM64. This is a VCPU-level function call which will be used to determine current state of given affinity level. Signed-off-by: Anup Patel Signed-off-by: Pranavkumar Sawargaonkar Reviewed-by: Christoffer Dall Acked-by: Marc Zyngier Signed-off-by: Christoffer Dall --- arch/arm/kvm/psci.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 50 insertions(+), 2 deletions(-) diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c index 5936213..3b6a0cf 100644 --- a/arch/arm/kvm/psci.c +++ b/arch/arm/kvm/psci.c @@ -27,6 +27,16 @@ * as described in ARM document number ARM DEN 0022A. */ +#define AFFINITY_MASK(level) ~((0x1UL << ((level) * MPIDR_LEVEL_BITS)) - 1) + +static unsigned long psci_affinity_mask(unsigned long affinity_level) +{ + if (affinity_level <= 3) + return MPIDR_HWID_BITMASK & AFFINITY_MASK(affinity_level); + + return 0; +} + static void kvm_psci_vcpu_off(struct kvm_vcpu *vcpu) { vcpu->arch.pause = true; @@ -85,6 +95,42 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu) return PSCI_RET_SUCCESS; } +static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu) +{ + int i; + unsigned long mpidr; + unsigned long target_affinity; + unsigned long target_affinity_mask; + unsigned long lowest_affinity_level; + struct kvm *kvm = vcpu->kvm; + struct kvm_vcpu *tmp; + + target_affinity = *vcpu_reg(vcpu, 1); + lowest_affinity_level = *vcpu_reg(vcpu, 2); + + /* Determine target affinity mask */ + target_affinity_mask = psci_affinity_mask(lowest_affinity_level); + if (!target_affinity_mask) + return PSCI_RET_INVALID_PARAMS; + + /* Ignore other bits of target affinity */ + target_affinity &= target_affinity_mask; + + /* + * If one or more VCPU matching target affinity are running + * then ON else OFF + */ + kvm_for_each_vcpu(i, tmp, kvm) { + mpidr = kvm_vcpu_get_mpidr(tmp); + if (((mpidr & target_affinity_mask) == target_affinity) && + !tmp->arch.pause) { + return PSCI_0_2_AFFINITY_LEVEL_ON; + } + } + + return PSCI_0_2_AFFINITY_LEVEL_OFF; +} + static void kvm_prepare_system_event(struct kvm_vcpu *vcpu, u32 type) { memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event)); @@ -132,6 +178,10 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu) case PSCI_0_2_FN64_CPU_ON: val = kvm_psci_vcpu_on(vcpu); break; + case PSCI_0_2_FN_AFFINITY_INFO: + case PSCI_0_2_FN64_AFFINITY_INFO: + val = kvm_psci_vcpu_affinity_info(vcpu); + break; case PSCI_0_2_FN_SYSTEM_OFF: kvm_psci_system_off(vcpu); /* @@ -157,12 +207,10 @@ static int kvm_psci_0_2_call(struct kvm_vcpu *vcpu) ret = 0; break; case PSCI_0_2_FN_CPU_SUSPEND: - case PSCI_0_2_FN_AFFINITY_INFO: case PSCI_0_2_FN_MIGRATE: case PSCI_0_2_FN_MIGRATE_INFO_TYPE: case PSCI_0_2_FN_MIGRATE_INFO_UP_CPU: case PSCI_0_2_FN64_CPU_SUSPEND: - case PSCI_0_2_FN64_AFFINITY_INFO: case PSCI_0_2_FN64_MIGRATE: case PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU: val = PSCI_RET_NOT_SUPPORTED;