target-arm: kvm - support for single step
This adds support for single-step. There isn't much to do on the QEMU
side as after we set-up the request for single step via the debug ioctl
it is all handled within the kernel.
The actual setting of the KVM_GUESTDBG_SINGLESTEP flag is already in the
common code. If the kernel doesn't support guest debug the ioctl will
simply error.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1449599553-24713-4-git-send-email-alex.bennee@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index 3b3929d..5f96cde 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -534,6 +534,13 @@
kvm_cpu_synchronize_state(cs);
switch (hsr_ec) {
+ case EC_SOFTWARESTEP:
+ if (cs->singlestep_enabled) {
+ return true;
+ } else {
+ error_report("Came out of SINGLE STEP when not enabled");
+ }
+ break;
case EC_AA64_BKPT:
if (kvm_find_sw_breakpoint(cs, env->pc)) {
return true;
