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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?59D7FWtHi5QvKDstFNEIW5B7d+YNnto6hm+p1GGNLCb1nAqIQ7W0VnmqPIY2?= =?us-ascii?Q?+4HySCCt0CzgCa4toV+Id53H6kIkL12l/k2cRT0BjcN26goSjK8PqR+UJOra?= =?us-ascii?Q?l3nK7LeCMEnSlC0AxngzemUI+rWWlxZtj1apoQSs3mrNeY7fiy9scUhlLIwb?= =?us-ascii?Q?R67V61EXXVIY3LBdBOSmCDBqe57DPuRMlj8u/j+ZjJoR9twOHvyeMgseGqqg?= =?us-ascii?Q?q+UqMvFywaGv7H46zA/ASMdvQMqYozkwkHuaW7+FdLcP+A5Yrtmzk6sSzSiE?= =?us-ascii?Q?XF8oxNSoJH5LD05NKuUzonYsxT181VDhHUfXWTK4asYD3sbAVH654i7kI6hF?= =?us-ascii?Q?zAVdUAWeZEjyG/Ny7dYHisM1h/QsIHYfs6TVuSve2a0nFDJtwSI49YH1ZCtd?= =?us-ascii?Q?ATXuZLRKHpv8poU9wxt22ZvUAa5+8v3jdBc5YnnscpJJswjcCt6o+znyvEa7?= =?us-ascii?Q?PPesU8jkksqc+0j+pU+3TZWFf8PYZZ4OXT5Eslcf3QEcqUl/hox1m68jJc4X?= =?us-ascii?Q?kYd6h21OsEVtcu2ebFpfD3K6xhI1A/LsH5p3aHWrneOoE2Xnk7IGsSn10TjW?= =?us-ascii?Q?0vNt2x9cmsbQwKyidx9uqGlxTN5yxaTCh7sGo5HYOV8j71+CC2ERu43WRgwf?= =?us-ascii?Q?1n72UYsB8S+NWTxVv6mmEaddl+OG/0dwhg3aHflu9C4jpGisU6VJNQi5yT9u?= =?us-ascii?Q?FdMqB1zhmvg5NLtSm7VGGIJEImGqUwKz+JDxNhNovaY3173E98TTv8POV8pl?= =?us-ascii?Q?2vvNOQjQyboAfL23COP1jdbd5v+Z3XqjnA0Es9qb4uhqOC7JOxPQP0O3lg/m?= =?us-ascii?Q?bn8xflSB4A9EFp1A4Yal+jY+vvYQKGlEM9HmyktKEs8Z5dHk7yM86NGqPwny?= =?us-ascii?Q?w5nae1pYbi7dc5HFM8eiDZsraP2qKKMDcYrsHeWqfZWhWtOK76OuG4pJIsvK?= =?us-ascii?Q?wFx35+AbZ0hOA0EbiVGrrCnZnOnqs0xErtrSY/099qYeRptp6x8RJ/SVw3+b?= =?us-ascii?Q?HRi+4xJ2XzGbemztxr+/brJpt+kq1Lnt9z1XkHfUN2SXwD6TuClgVSYK69p/?= =?us-ascii?Q?/YvxEU8niE4uF1vXMZS80qrhZH0wBFdUoHEWAIRfDNNWxvW1RezVQ5iT762h?= =?us-ascii?Q?NixXJwOBRA9uEPFjjBTIwEwDDYef8wtnpBw3CMvaA9JE6BHVILPVLz+79NUB?= =?us-ascii?Q?IkRISfefts3uV+JUQ6nLCDQRKFdfiQqK3HRFspUIbCnhIGJL0rz/hX13Ow4g?= =?us-ascii?Q?dPa/tUUqoeN/lnM6r5t3ddZiZ37b3GS0CJMXxxA7zFl80ZwX+3X+bQyl87Gm?= =?us-ascii?Q?8OCRt7Cx41m7NB+hdPSTAPTuiUhoGtZ+nESGVX0nzbDK3OVt1/2CuvfVrmjv?= =?us-ascii?Q?q7jMpCLei6AyduR65P3h9LnrmwmeLoGbQ10tS+CpHTojtWmIVgzJ77C/gwIO?= =?us-ascii?Q?q/SgErfzlUA6A2ajbCMithgJ2EsvDZU4p6LzlqwtnQrHHgIVDqAiO6nj8nqJ?= =?us-ascii?Q?wVRGf91dyKMRNQ0pxNf19SG3pcOY/kbKrxuThRLPqFR/Rp46w8pvkBP6MDpK?= =?us-ascii?Q?zJ0GMAt+sXZ8VkdYTEgOaj4xsfVJLhza2Wkf6Ony?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2cede1bd-078e-4a22-7d7b-08db6ccde206 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Jun 2023 11:52:52.2656 (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: s21TLjNjIlRhwI7c57C705+tQx/GUinN/rcgFSSxADK1YlRH+zei02LXo6EVXVta X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB8358 On Wed, Jun 14, 2023 at 08:07:30AM +0000, Tian, Kevin wrote: > think of a scenario where the vbios memory is shared by multiple qemu > instances then RW allows a malicious VM to modify the shared content > then potentially attacking other VMs. qemu would have to map the vbios as MAP_PRIVATE WRITE before the iommu side could map it writable, so this is not a real worry. Jason