Re: IOMMU faults after S3

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

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On Tue, Apr 07, 2026 at 01:52:18PM +0200, Jan Beulich wrote:
> On 07.04.2026 13:34, Marek Marczykowski-Górecki wrote:
> > On Tue, Apr 07, 2026 at 12:23:16PM +0200, Jan Beulich wrote:
> >> x86/HPET: channel handling in hpet_broadcast_resume()
> >>
> >> The per-channel ENABLE bit is to solely be driven by hpet_enable_channel()
> >> and hpet_msi_{,un}mask(). It doesn't need setting immediately. Except for
> >> the (possible) channel put in legacy mode we don't do so during boot
> >> either.
> >>
> >> Instead reset ->arch.cpu_mask, to avoid msi_compose_msg() yielding an
> >> all-zero message (when the passed in CPU mask has no online CPUs). Nothing
> >> would later call msi_compose_msg() / hpet_msi_write(), and hence nothing
> >> would later produce a well-formed message template in
> >> hpet_events[].msi.msg.
> >>
> >> Fixes: 15aa6c67486c ("amd iommu: use base platform MSI implementation")
> >> Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> >> Signed-off-by: Jan Beulich <jbeulich@suse.com>
> > 
> > This appears to fix the IOMMU faults.
> > Started with no-arat, the debug output is now this:
> 
> Same question here: May I translate this to Tested-by:?

Yes.

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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