This is the latest batch of mu 8xx MMU/TLB rework.
I think this is complete now and will relax with
other work the next few days. I hope I can get some
testing from Scott and Rex during this time.
Joakim Tjernlund (8):
8xx: invalidate non present TLBs
8xx: Update TLB asm so it behaves as linux
Now updated with Scott's remarks.
There is still(probably) a trivial conflict in pte-8xx.h
Joakim Tjernlund (8):
8xx: invalidate non present TLBs
8xx: Update TLB asm so it behaves as linux mm expects.
8xx: Tag DAR with 0x00f0 to catch buggy instructions.
8xx: Fixup DAR from buggy dcbX inst
On Sun, Oct 11, 2009 at 06:35:04PM +0200, Joakim Tjernlund wrote:
> This is the latest batch of mu 8xx MMU/TLB rework.
> I think this is complete now and will relax with
> other work the next few days. I hope I can get some
> testing from Scott and Rex during this time.
I applied this stack plus "
Scott Wood wrote on 14/10/2009 19:23:51:
>
> On Sun, Oct 11, 2009 at 06:35:04PM +0200, Joakim Tjernlund wrote:
> > This is the latest batch of mu 8xx MMU/TLB rework.
> > I think this is complete now and will relax with
> > other work the next few days. I hope I can get some
> > testing from Scott
arch/powerpc/kernel/head_8xx.o: In function `FixupDAR':
/home/rfeany/src/lnxnm/linux-dev/arch/powerpc/kernel/head_8xx.S:576: undefined
reference to `DARfix'
With all of your patches applied I have this problem:
open("/proc/mounts", O_RDONLY) = 3
fstat64(0x3, 0x7fc6ad58)=
Joakim Tjernlund wrote:
Now updated with Scott's remarks.
There is still(probably) a trivial conflict in pte-8xx.h
Joakim Tjernlund (8):
8xx: invalidate non present TLBs
8xx: Update TLB asm so it behaves as linux mm expects.
8xx: Tag DAR with 0x00f0 to catch buggy instructions.
8xx: Fixu
Rex Feany wrote on 15/10/2009 18:56:50:
>
> arch/powerpc/kernel/head_8xx.o: In function `FixupDAR':
> /home/rfeany/src/lnxnm/linux-dev/arch/powerpc/kernel/head_8xx.S:576: undefined
> reference to `DARfix'
>
> With all of your patches applied I have this problem:
>
> open("/proc/mounts", O_RDONLY)
Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.se):
> Right, it is the pte table walk that is blowing up.
> I just noted that 2.6 lacks a tophys() call in its table walk
> so I removed that one(there is one more tophys call but I don't think
> it should be removed).
> Try this addon patch
Rex Feany wrote on 16/10/2009 22:25:41:
>
> Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.se):
>
> > Right, it is the pte table walk that is blowing up.
> > I just noted that 2.6 lacks a tophys() call in its table walk
> > so I removed that one(there is one more tophys call but I don't t
Joakim Tjernlund/Transmode wrote on 17/10/2009 13:24:18:
>
> Rex Feany wrote on 16/10/2009 22:25:41:
> >
> > Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.se):
> >
> > > Right, it is the pte table walk that is blowing up.
> > > I just noted that 2.6 lacks a tophys() call in its table wal
> Probably better to walk the kernel page table too. Does this
> make a difference(needs the tophys() patch I posted earlier):
This whole thing would be a -lot- easier to do from C code. Why ? Simply
because you could just use get_user() to load the instruction rather
than doing this page table w
On Oct 26, 2009, at 3:47 PM, Benjamin Herrenschmidt wrote:
This whole thing would be a -lot- easier to do from C code. Why ?
Simply
because you could just use get_user() to load the instruction rather
than doing this page table walking in asm,
Just be careful the get_user() doesn't regenera
On Mon, 2009-10-26 at 16:26 -0700, Dan Malek wrote:
> Just be careful the get_user() doesn't regenerate the same
> translation error you are trying to fix by being here..
It shouldn't since it will always come up with a proper DAR but
you may want to double check before hand that your instruct
Benjamin Herrenschmidt wrote on 27/10/2009 01:00:53:
>
> On Mon, 2009-10-26 at 16:26 -0700, Dan Malek wrote:
> > Just be careful the get_user() doesn't regenerate the same
> > translation error you are trying to fix by being here..
yes, I had some problems with this initially but managed to w
On Tue, Oct 27, 2009 at 10:16:17AM +0100, Joakim Tjernlund wrote:
> Benjamin Herrenschmidt wrote on 27/10/2009
> 01:00:53:
> >
> > On Mon, 2009-10-26 at 16:26 -0700, Dan Malek wrote:
> > > Just be careful the get_user() doesn't regenerate the same
> > > translation error you are trying to fix by
Scott Wood wrote on 27/10/2009 16:58:41:
>
> On Tue, Oct 27, 2009 at 10:16:17AM +0100, Joakim Tjernlund wrote:
> > Benjamin Herrenschmidt wrote on 27/10/2009
> > 01:00:53:
> > >
> > > On Mon, 2009-10-26 at 16:26 -0700, Dan Malek wrote:
> > > > Just be careful the get_user() doesn't regenerate th
On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> Joakim Tjernlund/Transmode wrote on 17/10/2009 13:24:18:
> >
> > Rex Feany wrote on 16/10/2009 22:25:41:
> > >
> > > Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.se):
> > >
> > > > Right, it is the pte table walk that i
Scott Wood wrote on 30/10/2009 01:12:28:
>
> On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> > Joakim Tjernlund/Transmode wrote on 17/10/2009 13:24:18:
> > >
> > > Rex Feany wrote on 16/10/2009 22:25:41:
> > > >
> > > > Thus spake Joakim Tjernlund (joakim.tjernl...@transmode.s
On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> + mfspr r10, SPRN_SRR0
> DO_8xx_CPU6(0x3780, r3)
> mtspr SPRN_MD_EPN, r10
> mfspr r11, SPRN_M_TWB /* Get level 1 table entry address */
> - lwz r11, 0(r11) /* Get the level 1 entry */
> + cmp
On Fri, Oct 30, 2009 at 12:16:07PM -0500, Scott Wood wrote:
> On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> > + mfspr r10, SPRN_SRR0
> > DO_8xx_CPU6(0x3780, r3)
> > mtspr SPRN_MD_EPN, r10
> > mfspr r11, SPRN_M_TWB /* Get level 1 table entry address */
> >
Scott Wood wrote on 30/10/2009 18:37:49:
>
> On Fri, Oct 30, 2009 at 12:16:07PM -0500, Scott Wood wrote:
> > On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> > > + mfspr r10, SPRN_SRR0
> > > DO_8xx_CPU6(0x3780, r3)
> > > mtspr SPRN_MD_EPN, r10
> > > mfspr r
Scott Wood wrote on 30/10/2009 18:37:49:
>
> On Fri, Oct 30, 2009 at 12:16:07PM -0500, Scott Wood wrote:
> > On Sat, Oct 17, 2009 at 02:01:38PM +0200, Joakim Tjernlund wrote:
> > > + mfspr r10, SPRN_SRR0
> > > DO_8xx_CPU6(0x3780, r3)
> > > mtspr SPRN_MD_EPN, r10
> > > mfspr r
Joakim Tjernlund wrote:
and things seem to work. You could probably replace the rlwinm by
subtracting PAGE_OFFSET from swapper_pg_dir instead.
Just guessing here, do you mean:
lis r11, (swapper_pg_dir-PAGE_OFFSET)@h
ori r11, r11, (swapper_pg_dir-PAGE_OFFSET)@l
r
Scott Wood wrote on 03/11/2009 17:59:30:
>
> Joakim Tjernlund wrote:
> >> and things seem to work. You could probably replace the rlwinm by
> >> subtracting PAGE_OFFSET from swapper_pg_dir instead.
> >
> > Just guessing here, do you mean:
> >lis r11, (swapper_pg_dir-PAGE_OFFSET)@h
> >or
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