From: Fabiano Rosas <farosas@linux•ibm.com>
To: kvm-ppc@vger•kernel.org
Cc: kvm@vger•kernel.org, rkrcmar@redhat•com, aik@ozlabs•ru,
pbonzini@redhat•com, linuxppc-dev@lists•ozlabs.org,
david@gibson•dropbear.id.au
Subject: [RFC PATCH 0/1] KVM: PPC: Inform userspace about singlestep support
Date: Wed, 20 Mar 2019 15:39:49 -0300 [thread overview]
Message-ID: <20190320183951.29537-1-farosas@linux.ibm.com> (raw)
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).
QEMU thread:
http://patchwork.ozlabs.org/cover/1049811/
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(+)
--
2.20.1
next reply other threads:[~2019-03-20 20:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-20 18:39 Fabiano Rosas [this message]
2019-03-20 18:39 ` [RFC PATCH 1/1] KVM: PPC: Report single stepping capability Fabiano Rosas
2019-03-21 4:44 ` Alexey Kardashevskiy
2019-03-21 14:35 ` Fabiano Rosas
2019-04-24 4:14 ` Paul Mackerras
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