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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SA1PR12MB7199.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2e4e8b0e-d168-47df-4ef7-08dd65186228 X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Mar 2025 05:55:55.6577 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: wRZp9EIbCT1cBkfTdnkDLbUSiZMjk8oxr2TwkL+LJr2ykY252Pdc4gv6SNGbTxbW5nnLGgBtagpTjMddHezpbA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7975 X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: D759C100002 X-Stat-Signature: 6wd8hjc6igmpppqs6864ot4nykjdcp61 X-HE-Tag: 1742190958-465009 X-HE-Meta: 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 Am/gjiLt PfbRmNHtGWFcmj61L5gk+24QjPLebhByg3U9kSS+SgrDM6eNjMRvf0vL+wK1UbeouqvxXLTKHvt2WIxDXsgnvUs2PHIFrGdT84NpPfSNoMNfFQBFC1F9xtBWDTV6u2rF2Uv4UN7r1F08JMRk6AmxZBz6ZUbFu2GMgGL8XYCQoOj68PYSZYC9wtK5+4rB4pT6kDPCAXV7d8u551T/nMrq28wWOvTen9kTouZDtfuWGKot6azbc86yl+p1WUPxFE5eRPp+y/nDW12hdFfI96gO3OVqqXLIXoENkNrmeqZqf70rgyZl6XjC50uusSnlUFzh1dNDUsOdqflPkx+3qV28RCi5PLJVQNn2SKOns2VTd6rvwfsck5WGGF81N0X/28tnNdHiZ3PK3fJsg8ZDlw1uWQKbwtUkJljrKQoCi3TIQnnUKuZAME1N2uDaeOWmWTqapx7h69YUytV5q8PMSa/NA1wzEpow9L4CoXRskyX185WpXFG8eKIH1/z0iuQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.013221, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: >> For my education, what is an accepted way to communicate this? Please le= t=0A= >> me know if there are any relevant examples that you may be aware of.=0A= >=0A= > A KVM capability is what is usually needed.=0A= =0A= I see. If IIUC, this would involve a corresponding Qemu (usermode) change= =0A= to fetch the new KVM cap. Then it could fail in case the FWB is not=0A= supported with some additional conditions (so that the currently supported= =0A= configs with !FWB won't break on usermode). =0A= =0A= The proposed code change is to map in S2 as NORMAL when vma flags=0A= has VM_PFNMAP. However, Qemu cannot know that driver is mapping=0A= with PFNMAP or not. So how may Qemu decide whether it is okay to=0A= fail for !FWB or not?=0A= =0A= > This must be checked at the point of memslot creation, and return an=0A= > error at that point. Memslots are all about stage-2, so it makes sense=0A= > to check it there.=0A= =0A= Ack, will add the check.=0A= =0A= >=0A= >=A0=A0=A0=A0=A0=A0=A0 M.=0A= >=0A= > --=0A= > Without deviation from the norm, progress is not possible.=