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Mon, 15 Nov 2021 12:16:11 +0000 (GMT) Received: from [9.171.56.111] (unknown [9.171.56.111]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 15 Nov 2021 12:16:11 +0000 (GMT) Message-ID: Date: Mon, 15 Nov 2021 13:16:10 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH 0/5] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86 Content-Language: en-US To: Paolo Bonzini , Vitaly Kuznetsov , kvm@vger.kernel.org Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Eduardo Habkost , Marc Zyngier , Andrew Jones , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Mackerras , Michael Ellerman , kvm-ppc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20211111162746.100598-1-vkuznets@redhat.com> <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> From: Christian Borntraeger In-Reply-To: <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 4GM4n7HdUC8wY57Y8aQbGHZR4IYkcALh X-Proofpoint-ORIG-GUID: 8BYV8Df_CMNWb7XWAnYRT1TEmZU4UwBJ Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-15_10,2021-11-15_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1011 priorityscore=1501 malwarescore=0 spamscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111150067 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 11.11.21 um 17:32 schrieb Paolo Bonzini: > On 11/11/21 17:27, Vitaly Kuznetsov wrote: >> This is a comtinuation 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) > > Christian, can you look at this for s390?  Returning a fixed value seems wrong for KVM_CAP_NR_VCPUS. will do. (Sorry I was OOO the last days). > > Thanks, > > Paolo > >> Vitaly Kuznetsov (5): >>    KVM: arm64: Cap KVM_CAP_NR_VCPUS by KVM_CAP_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: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS >> >>   arch/arm64/kvm/arm.c            | 7 ++++++- >>   arch/mips/kvm/mips.c            | 2 +- >>   arch/powerpc/kvm/powerpc.c      | 4 ++-- >>   arch/riscv/kvm/vm.c             | 2 +- >>   arch/x86/include/asm/kvm_host.h | 1 - >>   arch/x86/kvm/x86.c              | 2 +- >>   6 files changed, 11 insertions(+), 7 deletions(-) >> > 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29FC6C433EF for ; Mon, 15 Nov 2021 12:17:51 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 DE85761C12 for ; 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Mon, 15 Nov 2021 12:09:21 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2429F42049; Mon, 15 Nov 2021 12:16:12 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E5E442042; Mon, 15 Nov 2021 12:16:11 +0000 (GMT) Received: from [9.171.56.111] (unknown [9.171.56.111]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 15 Nov 2021 12:16:11 +0000 (GMT) Message-ID: Date: Mon, 15 Nov 2021 13:16:10 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH 0/5] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86 Content-Language: en-US To: Paolo Bonzini , Vitaly Kuznetsov , kvm@vger.kernel.org Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Eduardo Habkost , Marc Zyngier , Andrew Jones , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Mackerras , Michael Ellerman , kvm-ppc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20211111162746.100598-1-vkuznets@redhat.com> <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> From: Christian Borntraeger In-Reply-To: <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 4GM4n7HdUC8wY57Y8aQbGHZR4IYkcALh X-Proofpoint-ORIG-GUID: 8BYV8Df_CMNWb7XWAnYRT1TEmZU4UwBJ X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-15_10,2021-11-15_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 clxscore=1011 priorityscore=1501 malwarescore=0 spamscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111150067 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211115_041625_637831_5F2D9E65 X-CRM114-Status: GOOD ( 20.61 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org QW0gMTEuMTEuMjEgdW0gMTc6MzIgc2NocmllYiBQYW9sbyBCb256aW5pOgo+IE9uIDExLzExLzIx IDE3OjI3LCBWaXRhbHkgS3V6bmV0c292IHdyb3RlOgo+PiBUaGlzIGlzIGEgY29tdGludWF0aW9u IG9mICJLVk06IHg4NjogRHJvcCBhcmJpdHJhdHkgS1ZNX1NPRlRfTUFYX1ZDUFVTIgo+PiAoaHR0 cHM6Ly9sb3JlLmtlcm5lbC5vcmcva3ZtLzIwMjExMTExMTM0NzMzLjg2NjAxLTEtdmt1em5ldHNA cmVkaGF0LmNvbS8pCj4+IHdvcmsuCj4+Cj4+IDEpIEVuZm9yY2UgS1ZNX0NBUF9OUl9WQ1BVUyA8 PSBLVk1fQ0FQX01BWF9WQ1BVUyBydWxlIG9uIGFsbAo+PiDCoCBhcmNoaXRlY3R1cmVzLiBbU2Vh biBDaHJpc3RvcGhlcnNvbl0KPj4gMikgTWFrZSBLVk1fQ0FQX05SX1ZDUFVTIHJldHVybiBudW1f b25saW5lX2NwdXMoKSBhbmQgbm90IGFuIGFyYml0cmFyeQo+PiDCoCB2YWx1ZSBvZiAnNzEwJyBv biB4ODYuCj4+Cj4+IEV2ZXJ5dGhpbmcgYnV0IHg4NiB3YXMgb25seSAnZXllYmFsbCB0ZXN0ZWQn LCB0aGUgY2hhbmdlIGlzIHRyaXZpYWwKPj4gYnV0IHNvcnJ5IGluIGFkdmFuY2UgaWYgSSBzY3Jl d2VkIHVwKQo+IAo+IENocmlzdGlhbiwgY2FuIHlvdSBsb29rIGF0IHRoaXMgZm9yIHMzOTA/wqAg UmV0dXJuaW5nIGEgZml4ZWQgdmFsdWUgc2VlbXMgd3JvbmcgZm9yIEtWTV9DQVBfTlJfVkNQVVMu Cgp3aWxsIGRvLiAoU29ycnkgSSB3YXMgT09PIHRoZSBsYXN0IGRheXMpLgo+IAo+IFRoYW5rcywK PiAKPiBQYW9sbwo+IAo+PiBWaXRhbHkgS3V6bmV0c292ICg1KToKPj4gwqDCoCBLVk06IGFybTY0 OiBDYXAgS1ZNX0NBUF9OUl9WQ1BVUyBieSBLVk1fQ0FQX01BWF9WQ1BVUwo+PiDCoMKgIEtWTTog TUlQUzogQ2FwIEtWTV9DQVBfTlJfVkNQVVMgYnkgS1ZNX0NBUF9NQVhfVkNQVVMKPj4gwqDCoCBL Vk06IFBQQzogQ2FwIEtWTV9DQVBfTlJfVkNQVVMgYnkgS1ZNX0NBUF9NQVhfVkNQVVMKPj4gwqDC oCBLVk06IFJJU0MtVjogQ2FwIEtWTV9DQVBfTlJfVkNQVVMgYnkgS1ZNX0NBUF9NQVhfVkNQVVMK Pj4gwqDCoCBLVk06IHg4NjogRHJvcCBhcmJpdHJhdHkgS1ZNX1NPRlRfTUFYX1ZDUFVTCj4+Cj4+ IMKgIGFyY2gvYXJtNjQva3ZtL2FybS5jwqDCoMKgwqDCoMKgwqDCoMKgwqDCoCB8IDcgKysrKysr LQo+PiDCoCBhcmNoL21pcHMva3ZtL21pcHMuY8KgwqDCoMKgwqDCoMKgwqDCoMKgwqAgfCAyICst Cj4+IMKgIGFyY2gvcG93ZXJwYy9rdm0vcG93ZXJwYy5jwqDCoMKgwqDCoCB8IDQgKystLQo+PiDC oCBhcmNoL3Jpc2N2L2t2bS92bS5jwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHwgMiArLQo+PiDC oCBhcmNoL3g4Ni9pbmNsdWRlL2FzbS9rdm1faG9zdC5oIHwgMSAtCj4+IMKgIGFyY2gveDg2L2t2 bS94ODYuY8KgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIHwgMiArLQo+PiDCoCA2IGZpbGVzIGNo YW5nZWQsIDExIGluc2VydGlvbnMoKyksIDcgZGVsZXRpb25zKC0pCj4+Cj4gCgpfX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2VybmVsIG1h aWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xp c3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVsCg== From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christian Borntraeger Date: Mon, 15 Nov 2021 12:16:10 +0000 Subject: Re: [PATCH 0/5] KVM: Cap KVM_CAP_NR_VCPUS by KVM_CAP_MAX_VCPUS and re-purpose it on x86 Message-Id: List-Id: References: <20211111162746.100598-1-vkuznets@redhat.com> <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> In-Reply-To: <4a3c7be7-12fa-6e47-64eb-02e6c5be5dbc@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit To: Paolo Bonzini , Vitaly Kuznetsov , kvm@vger.kernel.org Cc: Sean Christopherson , Wanpeng Li , Jim Mattson , Eduardo Habkost , Marc Zyngier , Andrew Jones , Huacai Chen , Aleksandar Markovic , Anup Patel , Paul Mackerras , Michael Ellerman , kvm-ppc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Am 11.11.21 um 17:32 schrieb Paolo Bonzini: > On 11/11/21 17:27, Vitaly Kuznetsov wrote: >> This is a comtinuation 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) > > Christian, can you look at this for s390?  Returning a fixed value seems wrong for KVM_CAP_NR_VCPUS. will do. (Sorry I was OOO the last days). > > Thanks, > > Paolo > >> Vitaly Kuznetsov (5): >>    KVM: arm64: Cap KVM_CAP_NR_VCPUS by KVM_CAP_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: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS >> >>   arch/arm64/kvm/arm.c            | 7 ++++++- >>   arch/mips/kvm/mips.c            | 2 +- >>   arch/powerpc/kvm/powerpc.c      | 4 ++-- >>   arch/riscv/kvm/vm.c             | 2 +- >>   arch/x86/include/asm/kvm_host.h | 1 - >>   arch/x86/kvm/x86.c              | 2 +- >>   6 files changed, 11 insertions(+), 7 deletions(-) >> >