Received-SPF: pass (google.com: domain of linux-kernel+bounces-129659-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249;
Message-ID: <8d1c178c-476e-4713-8efb-9d9f8b143af5@amd.com>
Date: Wed, 3 Apr 2024 16:53:24 +0530
User-Agent: Mozilla Thunderbird
Subject: Re: [ANNOUNCE] KVM Microconference at LPC 2024
To: Sean Christopherson <seanjc@google.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
 David Hildenbrand <david@redhat.com>, David Stevens <stevensd@chromium.org>,
 Paolo Bonzini <pbonzini@redhat.com>, Marc Zyngier <maz@kernel.org>,
 Oliver Upton <oliver.upton@linux.dev>, James Morse <james.morse@arm.com>,
 Suzuki K Poulose <suzuki.poulose@arm.com>, Zenghui Yu
 <yuzenghui@huawei.com>, Huacai Chen <chenhuacai@kernel.org>,
 Tianrui Zhao <zhaotianrui@loongson.cn>, Bibo Mao <maobibo@loongson.cn>,
 Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>,
 Anup Patel <anup@brainfault.org>,
 Christian Borntraeger <borntraeger@linux.ibm.com>,
 Janosch Frank <frankja@linux.ibm.com>,
 Claudio Imbrenda <imbrenda@linux.ibm.com>, Xiaoyao Li
 <xiaoyao.li@intel.com>, Xu Yilun <yilun.xu@intel.com>,
 Chao Peng <chao.p.peng@linux.intel.com>, Fuad Tabba <tabba@google.com>,
 Jim Mattson <jmattson@google.com>, Jarkko Sakkinen <jarkko@kernel.org>,
 Maxim Levitsky <mlevitsk@redhat.com>, Anish Moorthy <amoorthy@google.com>,
 David Matlack <dmatlack@google.com>, Yu Zhang <yu.c.zhang@linux.intel.com>,
 Isaku Yamahata <isaku.yamahata@intel.com>, Edgecombe@google.com,
 Rick P <rick.p.edgecombe@intel.com>, =?UTF-8?Q?Micka=C3=ABl_Sala=C3=BCn?=
 <mic@digikod.net>, Vlastimil Babka <vbabka@suse.cz>,
 Vishal Annapurve <vannapurve@google.com>,
 Ackerley Tng <ackerleytng@google.com>,
 Maciej Szmigiero <mail@maciej.szmigiero.name>,
 Quentin Perret <qperret@google.com>, Michael Roth <michael.roth@amd.com>,
 Wei Wang <wei.w.wang@intel.com>, Liam Merwick <liam.merwick@oracle.com>,
 Isaku Yamahata <isaku.yamahata@gmail.com>,
 Kirill Shutemov <kirill.shutemov@linux.intel.com>,
 Lai Jiangshan <jiangshan.ljs@antgroup.com>,
 Hou Wenlong <houwenlong.hwl@antgroup.com>,
 Xiong Zhang <xiong.y.zhang@linux.intel.com>,
 Jinrong Liang <ljr.kernel@gmail.com>, Like Xu <like.xu.linux@gmail.com>,
 Mingwei Zhang <mizhang@google.com>, Dapeng Mi <dapeng1.mi@intel.com>,
 Manali Shukla <manali.shukla@amd.com>
References: <20240402190652.310373-1-seanjc@google.com>
Content-Language: en-US
From: Sandipan Das <sandipan.das@amd.com>
In-Reply-To: <20240402190652.310373-1-seanjc@google.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0:
	=?utf-8?B?MXlHZ281RVZORWNQU09Sa24wU1Y3ekl1VVc5N2xLR2oxMlo1VHoxNytONUZm?=
 =?utf-8?B?V3lmUk1jbmNkTElmaTJJVGxhemZ0TzV6VWRKeDdXZG5ROTJvcU4weW5Yd3E3?=
 =?utf-8?B?UkRwdTlkUzIwUUZlZHliL0YwZW5QZGUrUEY1TzJvNWFBWlJpcVk5cmR6SE92?=
 =?utf-8?B?VG9zQmxBVDlJOGxXbERSaEJaV1plVmFMQlVEbmpDRGptMlo5ay9kMldZejhP?=
 =?utf-8?B?T3lQSWtKR1IxbS8vaExCelMxSFpMUXA3cnhId0J6ZzZnT2YvcTVNTWwyM1ll?=
 =?utf-8?B?TUhFR1Rid1FESzNPL2dtY1laZ1pDL1AzUmJGdHdVUnROMk8zdHVzSDA1MTda?=
 =?utf-8?B?Mm5tdlVGTUtWTFY0YlYxbExnQUhRZ0FZdG4rWVVRTGEwd1AvWUJVR1RMV2dR?=
 =?utf-8?B?anBOZnJPQmkyNXFlZzhKbnZzc01nc2JOYzQyajAzRjlRWUExRTlmSHdVSmw0?=
 =?utf-8?B?QjV6dTBYNXc4clhlc3hmQVhFN0VqQ1JJTW5EUVUrR2hkU25ucnFaeStpUFlr?=
 =?utf-8?B?bUZ5Vm1ST2p5NStBU21VWjBDZGFPcndFeFZSOXoydjlxOEV2VXJVdUF3cUJH?=
 =?utf-8?B?M1NudW5yYXJkam5WTVNDTnhnMStYZHEwS2lnNUtmUWVZWGd2OTNieDZRc3I4?=
 =?utf-8?B?SEdUTnFUK2k1b25yN0xDWGJtRFdYcldZKzV6cTdDaGo2a3dIZk9QMDYzcjZW?=
 =?utf-8?B?SEJlSUR3K3NLUmRMRWFsVyszaVg4QnFxUHJDRGpiWXFtOVJNRmdvVG9SSHFU?=
 =?utf-8?B?QS9Pb0FTZ2w3VGhRMnprcStnVHE0Zzc4K2J3KzVzNUJPQ1FsSktiQm1nSUdO?=
 =?utf-8?B?amhpd1lvVWIyWkJtOXRFTEVCNmNlNmxTNVllQisrZXhzNmhKTEFma2ZwMzZS?=
 =?utf-8?B?QXdSYVJZNVFZb2psT2I0eGMwZmlPcy9WYnRwWm1aT0NraWFmelEyLzZoVElZ?=
 =?utf-8?B?OHcyNmlXaUJ4dmtuK1hOZ0N2OXJ3Zm9kcmpkVzFkM0llU3NpYkRidEVPVmdX?=
 =?utf-8?B?eGhka2Fya0QxRkVyaW1SeVoyRDRKeEptQ1I5NWhzUDhMcEZnckZLYzNzSUdw?=
 =?utf-8?B?NElZU0JscVFrYUpUbGdJNitnTVJuaUF0V1JDejJCbnBubHJvc04xVHdHV0J4?=
 =?utf-8?B?dm80aldPbkxRbi9Yb0g3SDlJdTZONFBJOFpxUHlRV3FTNXVtOFNSZEwyOTVo?=
 =?utf-8?B?ZStnY2g3Y0ZvV0tlaVZVdVZ2WFJUOVNLQ0dGSEZUbFhjeEVnc3I1UExmbk9Z?=
 =?utf-8?B?dmNiUXNrQ3NzaHpNWVB5akIyQldDTkgySHBHaGErR2xZN0ZJL080WjhZYVVO?=
 =?utf-8?B?aUd5clcwL1Mya0dZbzZjSm00cTUxdEs1cDBiVWRtaGhaRG9tb3J5UFo0RzBO?=
 =?utf-8?B?L0hzTFZNSGpZTlk0SmxEZzdCR0tGcncybG90MWtzQXVFSVhTcSswUlRlbTlL?=
 =?utf-8?B?THVlMis4VEpHMHJDNzMya1llU0sxWVJOS1lJSmRhR0cvRnQzdWN4N2pDdGw0?=
 =?utf-8?B?M2Fjd3U1UHUxanhNdnJISzhZK251b09TcjJHT1NSb2trQjFyd1RWQTZXckRn?=
 =?utf-8?B?eE1Fczd2dkQwVytFNXRhNGxqWGcveEd2U0R5UHVGNm1kc1U5emVOQ3hvUWdu?=
 =?utf-8?B?QTRLQjhHSUo1ekVtRTBLWFljK2htNnpDcnk3NGxVc1NFQ3FXOGRIUzFNWGxq?=
 =?utf-8?B?eDVGQ0ZRQS84bWhtQ1E1SWNHTkQ5UGhZNzlzL1FrdkYyM1hVeUtIL1dRRU4v?=
 =?utf-8?B?RFI5SHJiclVQa2JZNmVpUENoN1UzaElaK01pVmU5Sm1yMDNoQWFvR1kyOWtY?=
 =?utf-8?B?N2ptVG9pcTJHd2swMWwxYzc0cVF6YkM2eEdHTXdxQ2UySEdTODFXNkJmeURD?=
 =?utf-8?B?b3dYaEVpZU1Jd3lMaVQ3QVZvZi9wSTJEbk5BT0NCeUY3dFdlVXJoY1owdnpP?=
 =?utf-8?B?SnJNdE4wS0E1RGhuVEtEVHA3dWlrMWpsd05jOFkxZTJEZ1pWRzR0dXpyWlh6?=
 =?utf-8?B?UGZkVnBXV05yUEFONVpFUlRac3FSNUNZRVh4MDdLTzcrZHpHTW1UanIzQjhW?=
 =?utf-8?B?ajFYc2NId1prN2VsNGJvQlY1blltZnJlRnE2YjBMdTlRdlY3VEtqb1hERnRC?=
 =?utf-8?Q?xbNcd4JTnUdebyCEQDBYYGGDl?=
X-OriginatorOrg: amd.com
X-MS-Exchange-CrossTenant-Network-Message-Id: a6085076-d425-45a9-811d-08dc53d0881f
X-MS-Exchange-CrossTenant-AuthSource: PH7PR12MB5712.namprd12.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2024 11:23:48.5961
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: aHF8qPYqIXAEN3t8usYeXWK5JwIy8NYsnhYCI0MLZVLGBSx879IC3Jav3prhHDXs9kCtxl9qvNNK1kzuW0+MtA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB9062

On 4/3/2024 12:36 AM, Sean Christopherson wrote:
> We are planning on submitting a CFP to host a second annual KVM Microconference
> at Linux Plumbers Conference 2024 (https://lpc.events/event/18).  To help make
> our submission as strong as possible, please respond if you will likely attend,
> and/or have a potential topic that you would like to include in the proposal.
> The tentative submission is below.
> 
> Note!  This is extremely time sensitive, as the deadline for submitting is
> April 4th (yeah, we completely missed the initial announcement).
> 
> Sorry for the super short notice. :-(
> 
> P.S. The Cc list is very ad hoc, please forward at will.
> 
> ===================
> KVM Microconference
> ===================
> 
> KVM (Kernel-based Virtual Machine) enables the use of hardware features to
> improve the efficiency, performance, and security of virtual machines (VMs)
> created and managed by userspace.  KVM was originally developed to accelerate
> VMs running a traditional kernel and operating system, in a world where the
> host kernel and userspace are part of the VM's trusted computing base (TCB).
> 
> KVM has long since expanded to cover a wide (and growing) array of use cases,
> e.g. sandboxing untrusted workloads, deprivileging third party code, reducing
> the TCB of security sensitive workloads, etc.  The expectations placed on KVM
> have also matured accordingly, e.g. functionality that once was "good enough"
> no longer meets the needs and demands of KVM users.
> 
> The KVM Microconference will focus on how to evolve KVM and adjacent subsystems
> in order to satisfy new and upcoming requirements.  Of particular interest is
> extending and enhancing guest_memfd, a guest-first memory API that was heavily
> discussed at the 2023 KVM Microconference, and merged in v6.8.
> 
> Potential Topics:
>    - Removing guest memory from the host kernel's direct map[1]
>    - Mapping guest_memfd into host userspace[2]
>    - Hugepage support for guest_memfd[3]
>    - Eliminating "struct page" for guest_memfd
>    - Passthrough/mediated PMU virtualization[4]
>    - Pagetable-based Virtual Machine (PVM)[5]
>    - Optimizing/hardening KVM usage of GUP[6][7]
>    - Defining KVM requirements for hardware vendors
>    - Utilizing "fault" injection to increase test coverage of edge cases
> 
> [1] https://lore.kernel.org/all/cc1bb8e9bc3e1ab637700a4d3defeec95b55060a.camel@amazon.com
> [2] https://lore.kernel.org/all/20240222161047.402609-1-tabba@google.com
> [3] https://lore.kernel.org/all/CABgObfa=DH7FySBviF63OS9sVog_wt-AqYgtUAGKqnY5Bizivw@mail.gmail.com
> [4] https://lore.kernel.org/all/20240126085444.324918-1-xiong.y.zhang@linux.intel.com
> [5] https://lore.kernel.org/all/20240226143630.33643-1-jiangshanlai@gmail.com
> [6] https://lore.kernel.org/all/CABgObfZCay5-zaZd9mCYGMeS106L055CxsdOWWvRTUk2TPYycg@mail.gmail.com
> [7] https://lore.kernel.org/all/20240320005024.3216282-1-seanjc@google.com

Passthrough PMU lays the foundation for enabling some current and upcoming PMU
virtualization features on AMD processors. Manali and I have been working on them
and would like to participate in the discussion.

- Sandipan