[RFC PATCH 0/1] KVM: PPC: Inform userspace about singlestep support
farosas at linux.ibm.com
Thu Mar 21 05:39:49 AEDT 2019
I am looking for a way to inform userspace about the lack of an
implementation in KVM HV for single stepping of instructions
(KVM_GUESTDGB_SINGLESTEP bit from SET_GUEST_DEBUG ioctl).
This will be used by QEMU to decide whether to attempt a call to the
set_guest_debug ioctl (for BookE, KVM PR) or fallback to a QEMU only
implementation (for KVM HV).
My current proposal is to introduce a ppc-specific capability for
this. However I'm not sure if this would be better as a cap common for
all architectures or even if it should report on all of the possible
set_guest_debug flags to cover for the future.
Please comment. Thanks.
Fabiano Rosas (1):
KVM: PPC: Report single stepping capability
arch/powerpc/kvm/powerpc.c | 5 +++++
include/uapi/linux/kvm.h | 1 +
2 files changed, 6 insertions(+)
More information about the Linuxppc-dev