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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Aug 2025 13:04:46.6201 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2e72fb83-709b-40d5-96e0-08ddd3577ce0 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[4.158.2.129];Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509E9.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR08MB5791 Hi > Yeoreum Yun wrote: > > > > This series introduces initial support for the SCTLR2_ELx registers in Linux. > > The feature is optional starting from ARMv8.8/ARMv9.3, > > and becomes mandatory from ARMv8.9/ARMv9.4. > > > > Currently, Linux has no strict need to modify SCTLR2_ELx— > > at least assuming that firmware initializes > > these registers to reasonable defaults. > > > > However, several upcoming architectural features will require configuring > > control bits in these registers. > > Notable examples include FEAT_PAuth_LR and FEAT_CPA2. > > > > This series is based on v6.16 and probably KVM-safe but > > Not tested yet: > > - nVHE boot. Okay. > > "Probably" and "Not tested yet" are not exactly what we are looking > for when looking at a series that adds support for a new architectural > feature. > > Also, a lot of the KVM patches are redundant now that we do have > FEAT_SCTLR2 support in KVM (see what has been merged for 6.17). You > probably want to rebase on -rc1 once it is released, which should cut > the series by half. > I didn't know that and I'll rebase on 6.17-rc1. Thanks. -- Sincerely, Yeoreum Yun