On Wed, Apr 26, 2017 at 02:01:55PM +0100, Peter Maydell wrote:

On 26 April 2017 at 14:00, Christoffer Dall [off-list ref] wrote:

quoted

Alternatively we should mark a pending error notification to the guest
in KVM, so that when the guest boots it gets something like an SError
instead, given that presumably the guest wrote the weird value.  Except
of course if the problem is caused by QEMU fudging with the register
value for the PENDBASER.

If we have scope for complaining at the guest we should do it at
the point where the guest sets PENDBASER in the first place...

Is that what the hardware would have done?

Also, userspace could restore a bogus value in the PENDBASER (even
though the guest wrote something sane), so maybe we should just keep
this as is and handle it nicely in QEMU?

Thanks,
-Christoffer

thanks
-- PMM