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gdbstub, kvm: let KVM report supported singlestep flags

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Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
[Extracted from Maxim's patch into a separate commit. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20211111110604.207376-5-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Maxim Levitsky 2021-11-11 12:06:03 +01:00 • committed by Paolo Bonzini
parent ecd39d620b
commit 12bc5b4cd5
3 changed files with 36 additions and 1 deletions
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10
gdbstub.c
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@ -391,6 +391,8 @@ static void init_gdbserver_state(void)
*/
if (replay_mode != REPLAY_MODE_NONE) {
gdbserver_state.supported_sstep_flags = SSTEP_ENABLE;
} else if (kvm_enabled()) {
gdbserver_state.supported_sstep_flags = kvm_get_supported_sstep_flags();
} else {
gdbserver_state.supported_sstep_flags =
SSTEP_ENABLE | SSTEP_NOIRQ | SSTEP_NOTIMER;
@ -400,7 +402,8 @@ static void init_gdbserver_state(void)
* By default use no IRQs and no timers while single stepping so as to
* make single stepping like an ICE HW step.
*/
gdbserver_state.sstep_flags = gdbserver_state.supported_sstep_flags;
gdbserver_state.sstep_flags = SSTEP_ENABLE | SSTEP_NOIRQ | SSTEP_NOTIMER;
gdbserver_state.sstep_flags &= gdbserver_state.supported_sstep_flags;
}
@ -3520,6 +3523,11 @@ int gdbserver_start(const char *device)
return -1;
}
if (kvm_enabled() && !kvm_supports_guest_debug()) {
error_report("gdbstub: KVM doesn't support guest debugging");
return -1;
}
if (!device)
return -1;
if (strcmp(device, "none") != 0) {