On 25.02.22 15:54, Jason A. Donenfeld wrote:
Hi Alex,
Missed this remark before:
On Fri, Feb 25, 2022 at 02:57:38PM +0100, Alexander Graf wrote:
Please expose the vmgenid via /sysfs so that user space even remotely
has a chance to check if it's been cloned.
No. Did you read the 0/2 cover letter? I'll quote it for you here:
As a side note, this series intentionally does _not_ focus on
notification of these events to userspace or to other kernel consumers.
Since these VM fork detection events first need to hit the RNG, we can
later talk about what sorts of notifications or mmap'd counters the RNG
should be making accessible to elsewhere. But that's a different sort of
project and ties into a lot of more complicated concerns beyond this
more basic patchset. So hopefully we can keep the discussion rather
focused here to this ACPI business.
What about that was unclear to you?
Anyway, it's a different thing that will have to be designed and
considered carefully, and that design doesn't have a whole lot to do
with this little driver here, except insofar as it could build on top of
it in one way or another. Yes, it's an important thing to do. No, I'm
not going to do it in this patch here. If you want to have a discussion
about that, start a different thread.
I'm not talking about a notification interface - we've gone through
great length on that one in the previous submission. What I'm more
interested in is *any* way for user space to read the current VM Gen ID.
The same way I'm interested to see other device attributes of my system
through sysfs.
Alex
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