Re: svn commit: r308817 - head/sys/powerpc/include [Still have pmap_t and struct pmap ppowerpc64 problems as of -r308860]

[Top post about patch issues.]

Looking at the patch it seems to be designed for when #else was in use:

> -#else
> +#elif defined(BOOKE)

but -r308817 already has the 2nd line (BOOKE). Your patch shows:

> Index: sys/powerpc/include/pmap.h
> ===================================================================
> --- sys/powerpc/include/pmap.h  (revision 308718)
> +++ sys/powerpc/include/pmap.h  (working copy)

So it looks like you started from before -r308817 .

Trying it (I'm at -r308860):

> Patching file sys/powerpc/include/pmap.h using Plan A...
> Hunk #1 succeeded at 74.
> Hunk #2 succeeded at 84.
> Hunk #3 succeeded at 132.
> Hunk #4 succeeded at 145.
> Hunk #5 failed at 180.
> Hunk #6 succeeded at 194.
> Hunk #7 succeeded at 210.
> 1 out of 7 hunks failed--saving rejects to sys/powerpc/include/pmap.h.rej

> # more sys/powerpc/include/pmap.h.rej
> _at__at_ -179,13 +180,13 _at__at_
>  struct slb **slb_alloc_user_cache(void);
>  void   slb_free_user_cache(struct slb **);
>  
> -#else
> +#elif defined(BOOKE)
>  
>  struct pmap {
> +       struct pmap_statistics  pm_stats;       /* pmap statistics */
>         struct mtx              pm_mtx;         /* pmap mutex */
>         tlbtid_t                pm_tid[MAXCPU]; /* TID to identify this pmap entries in TLB */
>         cpuset_t                pm_active;      /* active on cpus */
> -       struct pmap_statistics  pm_stats;       /* pmap statistics */
>  
>         /* Page table directory, array of pointers to page tables. */
>         pte_t                   *pm_pdir[PDIR_NENTRIES];


===
Mark Millard
markmi at dsl-only.net

On 2016-Nov-19, at 7:00 PM, Mark Millard <markmi_at_dsl-only.net> wrote:

It may take a little bit but I'll try the patch.

It looks like sys/powerpc/include/pmap.h from -r176700 from 2088-Mar-3
is when the BOOKE/E500 split started with the preprocessor use of AIM
and #else . This predates PowerMac G5 support.

This is definitely not new for the general structure on the powerpc
side of things. Any place that did not have the AIM vs. not status
available was subject to problems of possibly mismatched definitions.

===
Mark Millard
markmi at dsl-only.net

On 2016-Nov-19, at 6:47 PM, Justin Hibbits <jhibbits at freebsd.org> wrote:

On Sat, 19 Nov 2016 18:36:39 -0800
Mark Millard <markmi at dsl-only.net> wrote:

> [Quick top post I'm afraid.]
> 
> I think that I figured out why there is a problem even earlier
> --that just did not stop the compiles.
> 
> lib/libutil/kinfo_getallproc.c is built here as part of buildworld
> (stage 4.2 "building libraries" instead of buildkernel. It does not
> have the KERNCONF's AIM vs. BOOKE vs. . . . definitions vs. lack of
> them).
> 
> So if it includes machine/pmap.h that binds to
> sys/powerpc/include/pmap.h which has the structure. . .
> 
> . . .
> #if defined(AIM)
> . . . (definitions here)
> #elif defined(BOOKE)
> . . . (definitions here)
> #endif
> . . .
> 
> it gets no definition now.
> 
> With the older:
> 
> . . .
> #if defined(AIM)
> . . . (definitions here)
> #else
> . . . (definitions here)
> #endif
> . . .
> 
> It got a definition, just not necessarily the right one.
> 
> 
> ===
> Mark Millard
> markmi at dsl-only.net

Can you try the attached patch?  There was a subtle ABI issue that
r308817 exposed, which is that the pmap structs aren't identical such
that the pm_stats are at different locations, and libkvm ends up
reading with the Book-E pmap, getting different stats than expected for
AIM.  This patch fixes that, bumping version to account for this ABI
change.

- Justin<fix_pmap.diff>