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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Sep 2025 16:45:05.5215 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3722f37b-12a0-4750-7069-08ddf6098e22 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: DB5PEPF00014B91.eurprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR08MB7819 Hi, > On Wed, Sep 17, 2025 at 03:56:12PM +0100, 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. > > > > Patch History > > ============== > > from v4 to v5: > > - using .ifc in set_sctlr2_elx > > - change (re)initialise position after SCTLR_ELx > > - add docs for SCTRL2_ELx > > - rebase to v6.17-rc6 > > - https://lore.kernel.org/all/20250821172408.2101870-1-yeoreum.yun@arm.com/ > > Sorry, this is a really pedantic nit, but please can you fix the typo in > the subject if/when you next post this? > > More importantly, as Dave says, I don't see the point in merging this > until we have a use for the register. At that point, your patches can > hopefully be a prefix of the series that uses it. Okay. Thanks. -- Sincerely, Yeoreum Yun