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AJvYcCWuJCHCwYnmjcnd9zaUBfLQ9/gPaTNLfVxATZEvJj5n9omxoOv1fkiTWSpEll5xlg74qRhuyaKkFsNixb0e6HpFMj4= X-Gm-Message-State: AOJu0Yz65kSEXepLF88I5lArdN2EIxBpgpjGhFOZOizojsYooAEzHr4L nhy3HplKHOSH9nougBGNwid64O1KfxpAGfR+ie8TX7rCMYyF/AW+plm97cgzCGxHvJj3cJyPe8+ UYiwYUZqZBFKXxntvylWDAdfx/oAdBhfbKyXz X-Google-Smtp-Source: AGHT+IFWUUjU6sUNOq/Evye+BgmL3GiqmZBAyQyzUv6knnlnP8bIsfU6R8l0apQ6lQi0JL7TPW8eDB/LOqLphZSlreA= X-Received: by 2002:a25:b1a3:0:b0:dee:5cb6:483c with SMTP id 3f1490d57ef6-dee5cb64977mr12258845276.49.1715736131408; Tue, 14 May 2024 18:22:11 -0700 (PDT) MIME-Version: 1.0 References: <20240514020301.1835794-1-yuanchu@google.com> <2024051414-untie-deviant-ed35@gregkh> In-Reply-To: <2024051414-untie-deviant-ed35@gregkh> From: Yuanchu Xie Date: Tue, 14 May 2024 18:21:57 -0700 Message-ID: Subject: Re: [RFC PATCH v1 1/2] virt: memctl: control guest physical memory properties To: Greg Kroah-Hartman Cc: Wei Liu , Rob Bradford , "Theodore Ts'o" , Pasha Tatashin , Jonathan Corbet , Thomas Zimmermann , Dan Williams , Tom Lendacky , Kuppuswamy Sathyanarayanan , linux-kernel@vger.kernel.org, linux-mm@kvack.org, virtualization@lists.linux.dev, dev@lists.cloudhypervisor.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 9CF061A000F X-Stat-Signature: wmc9pydqmejw8nypuunqjsoge6ieacc9 X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1715736132-472965 X-HE-Meta: U2FsdGVkX1+no9zOc1zZBAzuNIJjpIXjE0Iw5YtzrnVfwQpyU7kxTXctGHd4cIB9gN4fdYygAkFejQQz9jq2+PJPmCAZGDEJko4rPr6iWTtsQltZfD0Ec1jJJ/NguT/g3qSeHG8ekLmkDWMSU7bmaRxrVcpbHZPeslKpmMh4QGMqUtgriF186KVXbZYdSK89P0dvK82cYWXkl1o8sRzhEFmGJtAi5QvleBUYLxum1cfUFOourKbQ2aeD8lgGkV3lb3wsPI/HKUi7SNbqUlHXE+ktbo9K391r+GcaDFv187NG+9qMx0urr9t+wTOeBwqN2JzC1ob3WzjrRVDyo5MEh7r+xUu55GYzmzNSArFv0+67ypLy8cNITerLIYuCD9QdK+cspqz/l1XHlaWjkXzTFo7Too354ODgTCBeVX5bI3jNwVX3i1wcteBq+28ooFtUdP6NUIrOdpK+EtdcOetq99VdhUCZIOD4zejCDzUtuS0YX0uFGLO66mo/AATRo2humWyu1xF5M1wwPxb4PAkqta0AB0Q/x+TuxbvGFzK7NygJMeCQL2v16EQ8v5aYsZbzZJEwRZSyeke0YhkrpcLiNM+qdb/PXc0qylVahYGwlNkvTTjHVuHbAZHnrt+N6auo6gdXmjv+wy/T2RtG3CATRwAolZFSjZXyEfSp5RgUlZUHnObh4pq1N107myJaU8wLeSdFWtj7ICVjg/saaZ5c9CxMlh12dRGJ6E9a+EGcOqAd0NyeAiosmJZxxZ9bytTbc7mUfgZUCHt+8z4gPnKHrDTuJZK8NxBlJ0as2DwirvNtlIhKCGnYtbetY5culZ4By0C9+2M2GoyRCLT6owKUjZIUFqjs/Ers3wK7UC+8wQ7jX+p2kUPOzBjd/BRVArPWu9YORWNGmLogVMkjvF5MBVutrORBuc+VKRbAnwVNLZQiZIWoznyA1L9GVVGkCoMxMgB0rMP7ToDdsb0xUzm kt1w/8wg zoNQ4sSOOeWAhGcYNF5rXDpO0QoxHPnTq5fMTSs/TEUwWUp7cbeechbdY3stxWJjinQbJQHxULwsM+Bn+lTGkmJfVUVpkUlF2zK5kZOfcLPFY0a6VoU43aFgqiXyPVptRKPsTm4euDlibPuaO5mAYSBYoboym7XVimB4oVZRCaF6m04+JC/lxYvpqQ9TgGpeBsGO+Z8PuWBC3xq+jfa+lVCq9ZbT6W1niI74CvDW8PkELk9Cbh6zVJETXcvggQpiL9bWqNSxlOOoKNZe49byv5CCFfbwJ+PNu3g+dDBTR3X9aUEZGmIF/PMQogA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, May 14, 2024 at 9:06=E2=80=AFAM Greg Kroah-Hartman wrote: > > On Mon, May 13, 2024 at 07:03:00PM -0700, Yuanchu Xie wrote: > > Memctl provides a way for the guest to control its physical memory > > properties, and enables optimizations and security features. For > > example, the guest can provide information to the host where parts of a > > hugepage may be unbacked, or sensitive data may not be swapped out, etc= . > >... > Pretty generic name for a hardware-specific driver :( It's not for real hardware btw. Its use case is similar to pvpanic where the device is emulated by the VMM. I can change the name if it's a problem. > Yup, you write this to hardware, please use proper structures and types > for that, otherwise you will have problems in the near future. Thanks for the review and comments on endianness and using proper types. Will do. Thanks, Yuanchu