[kvm-unit-tests PATCH v3 0/7] s390x: Cleanup exception register save/restore and implement backtrace
From: Janosch Frank <frankja@linux.ibm.com>
Date: 2021-02-22 09:30:02
Also in:
kvm
Having two sets of macros for saving and restoring registers on exceptions doesn't seem optimal to me. Therefore this patch set removes the old macros that use the lowcore as storage in favor of the stack using ones. At the same time we move over to generated offsets instead of subtracting from the stack piece by piece. Changes to the stack struct are easier that way. Additionally let's add backtrace support and print the GRs on exception so we get a bit more information when something goes wrong. v3: * Squashed the STACK_FRAME_INT_SIZE definition patch * Added a backchain store before we branch to the C pgm handler * Switched to the *int*_t types from kernel style types * Added comments v2: * Added full CR saving to fix diag308 test * Added rev-bys Janosch Frank (7): s390x: Fix fpc store address in RESTORE_REGS_STACK s390x: Fully commit to stack save area for exceptions s390x: Introduce and use CALL_INT_HANDLER macro s390x: Provide preliminary backtrace support s390x: Print more information on program exceptions s390x: Move diag308_load_reset to stack saving s390x: Remove SAVE/RESTORE_STACK and lowcore fpc and fprs save areas lib/s390x/asm-offsets.c | 17 ++++--- lib/s390x/asm/arch_def.h | 35 ++++++++++---- lib/s390x/asm/interrupt.h | 4 +- lib/s390x/interrupt.c | 43 +++++++++++++++--- lib/s390x/stack.c | 20 +++++--- s390x/Makefile | 1 + s390x/cpu.S | 6 ++- s390x/cstart64.S | 25 ++-------- s390x/macros.S | 96 ++++++++++++++++++++------------------- 9 files changed, 148 insertions(+), 99 deletions(-) -- 2.25.1