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target-arm: kvm - support for single step

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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>
This commit is contained in:
Alex Bennée 2015-12-17 13:37:15 +00:00 committed by Peter Maydell
parent 2ecb2027bc
commit 26ae593485
1 changed files with 7 additions and 0 deletions
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7
target-arm/kvm64.c
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@ -534,6 +534,13 @@ bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit)
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;