From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A965C07E99 for ; Fri, 9 Jul 2021 04:37:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7DBA16144D for ; Fri, 9 Jul 2021 04:37:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229641AbhGIEkS (ORCPT ); Fri, 9 Jul 2021 00:40:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229576AbhGIEkR (ORCPT ); Fri, 9 Jul 2021 00:40:17 -0400 Received: from mail-pj1-x1031.google.com (mail-pj1-x1031.google.com [IPv6:2607:f8b0:4864:20::1031]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C4993C061574 for ; Thu, 8 Jul 2021 21:37:33 -0700 (PDT) Received: by mail-pj1-x1031.google.com with SMTP id i16-20020a17090acf90b02901736d9d2218so374546pju.1 for ; Thu, 08 Jul 2021 21:37:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=H/LklQaJdTOXWeUT+mprxaDKrVkD8A9UO7oJUzmViNQ=; b=BG8tocLa4Fc6GVIjbj/83MmQ562w43ne1yivFCQz30vkd1c2tWv5D71ctj9JMn0a/s 3wZbh/hEhgz+vSrVvnrhuxUH9Rizx7klC2gPGSSX658M5KU/uGIgxQsLZ4tLgMU56Apd b3soeKez7tuOdGuGTWH0hrCgVZXgsByXKESZM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=H/LklQaJdTOXWeUT+mprxaDKrVkD8A9UO7oJUzmViNQ=; b=WReZBr7skLHJaOJOJixcH4zEJqV6b+BxLucD+paKbzxQyMSybw+0lvM8BrikGhFehc pJ0UHo+3XyFv6NOkZJBb3eQV2mbxrfmETybOykcoWmyC1acRDa8BarWZDOEjv6FAbiwO AmaF8xBr1r3M+q3UYqPNvtDdENzDqRi7q+bECihrWJerpzjrFsPvOQAks8tzq6OggcmN sNK2e9jsUw7wII/X8ya01UWuhCr13IBmnTlYxeNDXcj0Sx4cNsf0p7nZnkaTjNlz6D9F HZnqsgolUyfH0Qb9hY6lUdogoHmlX+fpBI8qd0NkkCR2uJvwrIZH/co2vzBZAbKM+0Jv eAJg== X-Gm-Message-State: AOAM532quwSazLzpGYDdnQUUjBBi+3ZAjT+5oaiw4QDUsQKDxvum2W26 UdFoaUv6lFRgOYTCIKG3e394Zg== X-Google-Smtp-Source: ABdhPJwQ4+9mQudHLFskGBug4FzGh1FHXv+U9yzd3L1gcLu6YE9FOXHurMSqd0ktQwQkYJA/TWJ0/Q== X-Received: by 2002:a17:90a:ff0d:: with SMTP id ce13mr2922178pjb.157.1625805453217; Thu, 08 Jul 2021 21:37:33 -0700 (PDT) Received: from senozhatsky.flets-east.jp ([2409:10:2e40:5100:a30d:fc4:7834:ee08]) by smtp.gmail.com with ESMTPSA id y4sm4420760pfa.14.2021.07.08.21.37.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 21:37:32 -0700 (PDT) From: Sergey Senozhatsky To: Marc Zyngier , Will Deacon Cc: Suleiman Souhlal , Joel Fernandes , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Sergey Senozhatsky Subject: [PATCHv2 0/4] arm64:kvm: teach guest sched that VCPUs can be preempted Date: Fri, 9 Jul 2021 13:37:09 +0900 Message-Id: <20210709043713.887098-1-senozhatsky@chromium.org> X-Mailer: git-send-email 2.32.0.93.g670b81a890-goog MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, This patch set adds a simple vcpu_is_preempted() implementation so that scheduler can make better decisions when it search for the idle (v)CPU. For sched benchmarks please refer to [0]. [0] https://github.com/sergey-senozhatsky/arm64-vcpu_is_preempted v2: - 5.13 rebase (static calls, etc) - simplified and reworked some bits Sergey Senozhatsky (4): arm64: smccc: Add SMCCC pv-vcpu-state function call IDs arm64: add guest pvstate support arm64: do not use dummy vcpu_is_preempted() arm64: add host pv-vcpu-state support arch/arm64/include/asm/kvm_host.h | 23 ++++++++ arch/arm64/include/asm/paravirt.h | 19 +++++++ arch/arm64/include/asm/spinlock.h | 18 +++--- arch/arm64/kernel/paravirt.c | 94 +++++++++++++++++++++++++++++++ arch/arm64/kernel/smp.c | 4 ++ arch/arm64/kvm/Makefile | 3 +- arch/arm64/kvm/arm.c | 3 + arch/arm64/kvm/hypercalls.c | 11 ++++ arch/arm64/kvm/pv-vcpu-state.c | 64 +++++++++++++++++++++ include/linux/arm-smccc.h | 18 ++++++ 10 files changed, 248 insertions(+), 9 deletions(-) create mode 100644 arch/arm64/kvm/pv-vcpu-state.c -- 2.32.0.93.g670b81a890-goog