Re: [PATCHv11 6/6] asm-generic/io: Add logging support for MMIO accessors

From: Sai Prakash Ranjan
Date: Thu Apr 28 2022 - 03:32:17 EST


On 4/28/2022 11:23 AM, Greg KH wrote:
On Thu, Apr 28, 2022 at 09:00:13AM +0530, Sai Prakash Ranjan wrote:
Add logging support for MMIO high level accessors such as read{b,w,l,q}
and their relaxed versions to aid in debugging unexpected crashes/hangs
caused by the corresponding MMIO operation. Also add a generic flag
(__DISABLE_TRACE_MMIO__) which is used to disable MMIO tracing in nVHE KVM
and if required can be used to disable MMIO tracing for specific drivers.
Also, this should be split up into 2 patches, one to add the "disable
the feature" flag, and one to enable it for the specific driver(s) you
want.

Hint, when you say "also" in a changelog text, that's a huge sign that
it perhaps should be split up into smaller pieces.


Right, will split them.

Thanks,
Sai