From patchwork Tue Nov 16 16:34:37 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vitaly Kuznetsov X-Patchwork-Id: 12622923 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8266EC433F5 for ; Tue, 16 Nov 2021 16:35:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 653C761A64 for ; Tue, 16 Nov 2021 16:35:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233804AbhKPQh5 (ORCPT ); Tue, 16 Nov 2021 11:37:57 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:53773 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233617AbhKPQh4 (ORCPT ); Tue, 16 Nov 2021 11:37:56 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1637080498; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=H98AZZt3YXueDbe06DAd9PZXKaVwBHPevQBi7cG9ec0=; b=SjtkIolLEgV7lKmBleWj6ywL8gfGj7pxKDC1SbCp2HOes1Xxu4lDZghiDH3p9ZmlJo0v52 A2rW2Z4R/3unFzxA24qZ8z/BkC1HSBVkbxtAeAdrSpfjtviTdXjDBog5fmyRMJtJIPNmud xleeygg78msnKD1H4oA0bXIBaxEJP40= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-334-FaBZdD75OCuo2_pGh_WFDw-1; Tue, 16 Nov 2021 11:34:55 -0500 X-MC-Unique: FaBZdD75OCuo2_pGh_WFDw-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B5B8487D544; Tue, 16 Nov 2021 16:34:52 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.40.192.236]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0AE0C60C7F; Tue, 16 Nov 2021 16:34:44 +0000 (UTC) From: Vitaly Kuznetsov To: kvm@vger.kernel.org, Paolo Bonzini Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Eduardo Habkost , Marc Zyngier , Andrew Jones , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Mackerras , Michael Ellerman , Christian Borntraeger , Janosch Frank , kvm-ppc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/6] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86 Date: Tue, 16 Nov 2021 17:34:37 +0100 Message-Id: <20211116163443.88707-1-vkuznets@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Changes since v1: - PATCH6 for s390 added. - On ARM64, do not make KVM_CAP_NR_VCPUS return value dependent on whether it is a system-wide ioctl or a per-VM one [Marc Zyngier]. Original description: This is a continuation of "KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS" (https://lore.kernel.org/kvm/20211111134733.86601-1-vkuznets@redhat.com/) work. 1) Enforce KVM_CAP_NR_VCPUS <= KVM_CAP_MAX_VCPUS rule on all architectures. [Sean Christopherson] 2) Make KVM_CAP_NR_VCPUS return num_online_cpus() and not an arbitrary value of '710' on x86. Everything but x86 was only 'eyeball tested', the change is trivial but sorry in advance if I screwed up) Vitaly Kuznetsov (6): KVM: arm64: Cap KVM_CAP_NR_VCPUS by kvm_arm_default_max_vcpus() KVM: MIPS: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS KVM: PPC: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS KVM: RISC-V: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS KVM: s390: Cap KVM_CAP_NR_VCPUS by num_online_cpus() KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS arch/arm64/kvm/arm.c | 9 ++++++++- arch/mips/kvm/mips.c | 2 +- arch/powerpc/kvm/powerpc.c | 4 ++-- arch/riscv/kvm/vm.c | 2 +- arch/s390/kvm/kvm-s390.c | 2 ++ arch/x86/include/asm/kvm_host.h | 1 - arch/x86/kvm/x86.c | 2 +- 7 files changed, 15 insertions(+), 7 deletions(-)