linux-kernel - Re: [RFC PATCH 7/9] cxl/test: Add generic mock events

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Message-ID: <YzIcKFSRtXHiuG0+@iweiny-desk3>
Date:   Mon, 26 Sep 2022 14:39:52 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC:     "Williams, Dan J" <dan.j.williams@...el.com>,
        "Schofield, Alison" <alison.schofield@...el.com>,
        "Verma, Vishal L" <vishal.l.verma@...el.com>,
        Ben Widawsky <bwidawsk@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Davidlohr Bueso <dave@...olabs.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-cxl@...r.kernel.org" <linux-cxl@...r.kernel.org>
Subject: Re: [RFC PATCH 7/9] cxl/test: Add generic mock events

On Tue, Sep 20, 2022 at 09:17:48AM -0700, Jonathan Cameron wrote:
> On Thu, 15 Sep 2022 11:53:29 -0700
> Ira Weiny <ira.weiny@...el.com> wrote:
> 
> > On Thu, Aug 25, 2022 at 12:31:19PM +0100, Jonathan Cameron wrote:
> > > On Fri, 12 Aug 2022 22:32:41 -0700
> > > ira.weiny@...el.com wrote:
> > >   
> > > > From: Ira Weiny <ira.weiny@...el.com>
> > > > 
> > > > Facilitate testing basic Get/Clear Event functionality by creating
> > > > multiple logs and generic events with made up UUID's.
> > > > 
> > > > Data is completely made up with data patterns which should be easy to
> > > > spot in trace output.  
> > > Hi Ira,
> > > 
> > > I'm tempted to hack the QEMU emulation for this in with appropriately
> > > complex interface to inject all the record types...  
> > 
> > Every time I look at the QEMU code it makes my head spin.  :-(
> 
> You get used to it ;)`

I'm trying...  :-/

Question though:

Is there a call in qemu which is equivalent to cpu_to_leXX()?  The
exec/cpu-all.h is having compilation issues for me because the
TARGET_BIG_ENDIAN is not defined (it is defined in a meson generated header).

So I'm afraid that the tswapXX() calls are not what I'm supposed to use.  Is
this true?  Are those some sort of internal call?

Ira