From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabiano Rosas Date: Wed, 20 Mar 2019 18:39:50 +0000 Subject: [RFC PATCH 1/1] KVM: PPC: Report single stepping capability Message-Id: <20190320183951.29537-2-farosas@linux.ibm.com> List-Id: References: <20190320183951.29537-1-farosas@linux.ibm.com> In-Reply-To: <20190320183951.29537-1-farosas@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 When calling the KVM_SET_GUEST_DEBUG ioctl, userspace might request the next instruction to be single stepped via the KVM_GUESTDBG_SINGLESTEP control bit of the kvm_guest_debug structure. We currently don't have support for guest single stepping implemented in Book3S HV. This patch adds the KVM_CAP_PPC_GUEST_DEBUG_SSTEP capability in order to inform userspace about the state of single stepping support. Signed-off-by: Fabiano Rosas --- arch/powerpc/kvm/powerpc.c | 5 +++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 6 insertions(+) diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 8885377ec3e0..5ba990b0ec74 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -538,6 +538,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_IMMEDIATE_EXIT: r = 1; break; + case KVM_CAP_PPC_GUEST_DEBUG_SSTEP: +#ifdef CONFIG_BOOKE + r = 1; + break; +#endif case KVM_CAP_PPC_PAIRED_SINGLES: case KVM_CAP_PPC_OSI: case KVM_CAP_PPC_GET_PVINFO: diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 6d4ea4b6c922..33e8a4db867e 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 +#define KVM_CAP_PPC_GUEST_DEBUG_SSTEP 168 #ifdef KVM_CAP_IRQ_ROUTING -- 2.20.1