I started out looking at this to reduce divergence of TCG and KVM machines with 2nd DAWR. The divergence already exists with first DAWR, so I don't want to tie the KVM 2nd DAWR enablement to this, but it would be nice to ensure the caps and such for the 2nd DAWR will also work for TCG.
I don't know that we have great test cases for this, it does work with some of the Linux selftests ptrace debug tests (although those tests seem to have a few issues in upstream kernels), some basic Linux xmon and gdb tests by hand, and I've started working on some kvm unit tests. Thanks, Nick Nicholas Piggin (6): target/ppc: Remove single-step suppression inside 0x100-0xf00 target/ppc: Improve book3s branch trace interrupt for v2.07S target/ppc: Suppress single step interrupts on rfi-type instructions target/ppc: Implement breakpoint debug facility for v2.07S target/ppc: Implement watchpoint debug facility for v2.07S spapr: implement H_SET_MODE debug facilities hw/ppc/spapr_hcall.c | 57 +++++++++++++++++++++ target/ppc/cpu.c | 86 +++++++++++++++++++++++++++++++ target/ppc/cpu.h | 7 +++ target/ppc/cpu_init.c | 11 ++-- target/ppc/excp_helper.c | 108 ++++++++++++++++++++++++++++++++++++++- target/ppc/helper.h | 4 ++ target/ppc/internal.h | 3 ++ target/ppc/machine.c | 5 ++ target/ppc/misc_helper.c | 15 ++++++ target/ppc/spr_common.h | 3 ++ target/ppc/translate.c | 60 +++++++++++++++++----- 11 files changed, 341 insertions(+), 18 deletions(-) -- 2.40.1