Re: [Qemu-devel] [PATCH] hw/isa/lpc_ich9: inject the SMI on the VCPU that is writing to APM_CNT

[Paolo Bonzini]

On 21/10/2015 20:36, Jordan Justen wrote:
> On 2015-10-20 11:14:00, Laszlo Ersek wrote:
> > Commit 4d00636e97b7 ("ich9: Add the lpc chip", Nov 14 2012) added the
> > ich9_apm_ctrl_changed() ioport write callback function such that it would
> > inject the SMI, in response to a write to the APM_CNT register, on the
> > first CPU, invariably.
> > 
> > Since this register is used by guest code to trigger an SMI synchronously,
> > the interrupt should be injected on the VCPU that is performing the write.
> 
> Why not send an SMI to *all* processors, like the real chipsets do?

That's much less scalable, and more important I would have to check that
SeaBIOS can handle that correctly.  It probably doesn't, as it doesn't
relocate SMBASEs.

Paolo