Re: [Xen-devel] xc_hvm_inject_trap() races

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.11.16 at 16:24, <rcojocaru@xxxxxxxxxxxxxxx> wrote:
> The one-shot vm_event does sound reasonable. I could set a flag
> per-VCPU, basically similar to v->arch.hvm_vcpu.inject_trap.vector, and
> fire a single event from hvm_inject_trap() if it's set (then unset it) -
> the flag would be set via an xc_monitor_next_interrupt() call in libxc.

Doing this in hvm_inject_trap() would not cover all cases afict.
I'd suggest doing this from hvm_do_resume() _after_ the
(conditional) call to hvm_inject_trap(), if there is _any_ event
pending.

Jan


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