This patchset adds ppc64 server side support for software breakpoint and extends the use of illegal instruction as software breakpoint across ppc platform.
Patch 1, adds kernel side support for software breakpoint. Design is that, by using an illegal instruction, we trap to hypervisor via Emulation Assistance interrupt, where we check for the illegal instruction and accordingly we return to Host or Guest. Patch also adds support for software breakpoint in PR KVM. Patch 2,extends the use of illegal instruction as software breakpoint instruction across the ppc platform. Patch extends booke program interrupt code to support software breakpoint. Patch 2 is only compile tested. Will really help if someone can try it out and let me know comments. Changes v5->v6: Fixed checkpatch.pl errors Added abort case as a seperate condition block in emulation function in book3s_hv Added debug active check for instruction emulation Modified return value to emulate_fail in else part of illegal instruction case in book3s_pr.c Removed KVMPPC_INST_EHPRIV_DEBUG instruction Moved the debug instruction as a separate block in program interrupt code Changes v4->v5: Made changes to code comments and commit messages Added debugging active checks for illegal instr comparison Added debug instruction check in emulate code Extended SW breakpoint to booke Changes v3->v4: Made changes to code comments and removed #define of zero opcode Added a new function to handle the debug instruction emulation in book3s_hv Rebased the code to latest upstream source. Changes v2->v3: Changed the debug instructions. Using the all zero opcode in the instruction word as illegal instruction as mentioned in Power ISA instead of ABS Removed reg updated in emulation assist and added a call to kvmppc_emulate_instruction for reg update. Changes v1->v2: Moved the debug instruction #def to kvm_book3s.h. This way PR_KVM can also share it. Added code to use KVM get one reg infrastructure to get debug opcode. Updated emulate.c to include emulation of debug instruction incase of PR_KVM. Made changes to commit message. Madhavan Srinivasan (2): powerpc/kvm: support to handle sw breakpoint powerpc/kvm: common sw breakpoint instr across ppc arch/powerpc/include/asm/kvm_booke.h | 2 -- arch/powerpc/include/asm/kvm_ppc.h | 6 ++++++ arch/powerpc/kvm/book3s.c | 3 ++- arch/powerpc/kvm/book3s_hv.c | 41 ++++++++++++++++++++++++++++++++---- arch/powerpc/kvm/book3s_pr.c | 3 +++ arch/powerpc/kvm/booke.c | 19 ++++++++++++++++- arch/powerpc/kvm/emulate.c | 15 +++++++++++++ 7 files changed, 81 insertions(+), 8 deletions(-) -- 1.7.11.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
