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x-microsoft-antispam-message-info: hYTyS/w/z5FCRH5Y4AvjGjUf5EKFCg5g6F9n2xqEQgat7sGsm6gKF0YhepqKSVm70fBfjnmSub3X132jWm+P5Df82+fjGTZsWgGDHOZfcnGUq8d2T37J+kOdmsUbT+TQj7NOOf4JkSM+zVXjXG/eNXhzGpq546vltn/dIG2CU4T3ycYDP/lk9jp9w61TBokOZKx+G5b5BZR87D9w8DqiuoLkueAJmnlpimH8NkJOkPfD3vW/1oXgJDkZ7V/cVEN0wwvYR/o0LG7PktpLGtwh+4v0Jt2yjTD3vLCphJS1kh/ng8GJXQWm/wbPYupdGt/eENweCIaDOZsp0kfXo6Dm0Kmc8gim78MIJT927Ui34D8= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: ce2a0665-3d85-42d4-f9aa-08d5dd08a977 X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Jun 2018 15:06:01.4381 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB0922 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Vitaly Kuznetsov > Sent: Thursday, June 28, 2018 8:05 AM > To: Wanpeng Li > Cc: Radim Krcmar ; kvm ; > Paolo Bonzini ; Roman Kagan > ; KY Srinivasan ; Haiyang > Zhang ; Stephen Hemminger > ; Michael Kelley (EOSG) > ; Mohammed Gamal > ; Cathy Avery ; LKML kernel@vger.kernel.org> > Subject: Re: [PATCH 3/3] KVM: x86: hyperv: implement PV IPI send > hypercalls >=20 > Wanpeng Li writes: >=20 > > Hi Paolo and Radim, > > > > I have already completed the patches for linux guest/kvm/qemu w/ vCPUs > > <=3D 64, however, extra complication as the ex in hyperv should be > > introduced for vCPUs > 64, so do you think vCPU <=3D64 is enough for > > linux guest or should me introduce two hypercall as what hyperv does > > w/ ex logic? > > >=20 > Neither Paolo nor Radim but as we already have > #define KVM_MAX_VCPUS 288 > on at least x86, supporting <=3D 64 vCPUs seems to be too limiting for an= y > new functionality. Agreed. K. Y >=20 > -- > Vitaly