f516e91715
This adds support for the new PM pstate system register introduced by the v9.4-A Exception-based Event Profiling extension (FEAT_EBEP). The new PM pstate register takes a 1-bit immediate and requires different values to be specified for the higher bits of the Crm field. To enable that, this patch creates an explicit separation between the pstate system registers that take 4-bit and 1-bit immediate operands, allowing each entry to specify the value for the 3 high bits of Crm. This also updates other pstate registers to correctly accept 4-bit immediates, matching their decoding specification from the Arm ARM. These include: `PAN`, `UAO`, `DIT` and `SSBS`. More information about this extension and the new register can be found at: * https://developer.arm.com/documentation/ddi0601/2022-09/AArch64-Registers/PM--PMU-Exception-Mask Contributors: * Lucas Prates * Sam Elliott Reviewed By: lenary Differential Revision: https://reviews.llvm.org/D139925
78 KiB
78 KiB