From: Jan Kiszka <[email protected]>

Hopefully the last regression of 4c0960c0: KVM_SET_GUEST_DEBUG requires
properly synchronized guest registers (on x86: eflags) on entry.

Signed-off-by: Jan Kiszka <[email protected]>
Signed-off-by: Marcelo Tosatti <[email protected]>

diff --git a/qemu-kvm.c b/qemu-kvm.c
index bff11e8..6ca3b0f 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -2282,6 +2282,10 @@ static void kvm_invoke_set_guest_debug(void *data)
 {
     struct kvm_set_guest_debug_data *dbg_data = data;
 
+    if (cpu_single_env->kvm_cpu_state.regs_modified) {
+        kvm_arch_put_registers(cpu_single_env);
+        cpu_single_env->kvm_cpu_state.regs_modified = 0;
+    }
     dbg_data->err =
         kvm_set_guest_debug(cpu_single_env->kvm_cpu_state.vcpu_ctx,
                             &dbg_data->dbg);
--
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