Re: [PATCH] interconnect: qcom: icc-rpmh: Add opt-out parameter for QoS settings

On 9/8/2026 1:04 PM, Abel Vesa wrote:

On 26-09-07 22:15:09, Marc Zyngier wrote:

quoted

On Mon, 07 Sep 2026 21:21:44 +0100,
Abel Vesa [off-list ref] wrote:

quoted

On 26-09-07 18:17:29, Marc Zyngier wrote:

quoted

Recent addition of QoS configuration to the X1 variants resulted in
systems that spontaneously reset at boot time or under load.

Given that this is both very unpleasant and hard to debug, give the
affected user the option to survive such event with a module parameter.

Passing "icc_rpmh.enable_qos=0" to the kernel command-line will skip the
offending QoS setup.

Lets not start doing this, please.

Can we figure out which platform deosn't work and then maybe we can 
add a quirk in DT per platform?

We have at least 3 machines that are dysfunctional since [1] was
merged (mini-x, sp12 and devkit). Probably some more, but I'm not
going to be the one doing a survey.

What really should happen is [1] to be reversed until QC figures out a
set of parameters that actually works, instead of making this platform
even more unreliable than it already is.

I'd rather have the patch reverted than adding a module parameter which
users might not know about and distros will probably never addopt.

quoted

Just like [2] should have been reverted.

Until then, we'll have to paper over this stuff.

But a module parameter complicates things rather than just papering over.

I suggest we get both reverted if they break existing platforms.

I will share a patch to add interconnect support for Purwa. 
Purwa is similar to Hamoa, but there are few port additions and deletions with 
respect to PCIe, and trying to program QoS for them can result in crash. 

Thanks,
Raviteja.