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kvm: add support for KVM_GUESTDBG_BLOCKIRQ

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Use the KVM_GUESTDBG_BLOCKIRQ debug flag if supported.

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>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211111110604.207376-6-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Maxim Levitsky 2021-11-11 12:06:04 +01:00 committed by Paolo Bonzini
parent 12bc5b4cd5
commit fd2ddd1689
1 changed files with 17 additions and 0 deletions
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17
accel/kvm/kvm-all.c
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@ -61,6 +61,10 @@
#endif
#define PAGE_SIZE qemu_real_host_page_size
#ifndef KVM_GUESTDBG_BLOCKIRQ
#define KVM_GUESTDBG_BLOCKIRQ 0
#endif
//#define DEBUG_KVM
#ifdef DEBUG_KVM
@ -2574,6 +2578,15 @@ static int kvm_init(MachineState *ms)
kvm_sstep_flags = 0;
if (kvm_has_guest_debug) {
kvm_sstep_flags = SSTEP_ENABLE;
#if defined KVM_CAP_SET_GUEST_DEBUG2
int guest_debug_flags =
kvm_check_extension(s, KVM_CAP_SET_GUEST_DEBUG2);
if (guest_debug_flags & KVM_GUESTDBG_BLOCKIRQ) {
kvm_sstep_flags |= SSTEP_NOIRQ;
}
#endif
}
kvm_state = s;
@ -3205,6 +3218,10 @@ int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
if (cpu->singlestep_enabled) {
data.dbg.control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP;
if (cpu->singlestep_enabled & SSTEP_NOIRQ) {
data.dbg.control |= KVM_GUESTDBG_BLOCKIRQ;
}
}
kvm_arch_update_guest_debug(cpu, &data.dbg);