[0/4] RISC-V: Dynamic ftrace support for RV32I

Message

Jamie Iles Oct. 27, 2022, 5:24 p.m. UTC

This series enables dynamic ftrace support for RV32I bringing it to 
parity with RV64I.  Most of the work is already there, this is largely 
just assembly fixes to handle register sizes, correct handling of the 
psABI calling convention and Kconfig change.

Validated with all ftrace boot time self test with qemu for RV32I and 
RV64I in addition to real tracing on an RV32I FPGA design.

Jamie Iles (4):
  RISC-V: use REG_S/REG_L for mcount
  RISC-V: reduce mcount save space on RV32
  RISC-V: preserve a1 in mcount
  RISC-V: enable dynamic ftrace for RV32I

 arch/riscv/Kconfig         | 10 ++++-----
 arch/riscv/kernel/mcount.S | 44 ++++++++++++++++++++------------------
 2 files changed, 28 insertions(+), 26 deletions(-)