Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

[PARISC] fix TLB fault path on PA2.0 narrow systems

Browse source 
commit 5e185581d7
Author: James Bottomley <JBottomley@Parallels.com>

    [PARISC] fix PA1.1 oops on boot

Didn't quite fix the crash on boot.  It moved it from PA1.1 processors to
PA2.0 narrow kernels.  The final fix is to make sure the [id]tlb_miss_20 paths
also work.  Even on narrow systems, these paths require using the wide
instructions becuase the tlb insertion format is wide.  Fix this by
conditioning the dep[wd],z on whether we're being called from _11 or _20[w]
paths.

Tested-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
James Bottomley 2012-05-21 07:49:01 +01:00
parent ed5fb2471b
commit 2f649c1f6f
1 changed files with 17 additions and 13 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
arch/parisc/kernel/entry.S
View file

@ -552,7 +552,7 @@
* entry (identifying the physical page) and %r23 up with
* the from tlb entry (or nothing if only a to entry---for
* clear_user_page_asm) */
.macro do_alias spc,tmp,tmp1,va,pte,prot,fault
.macro do_alias spc,tmp,tmp1,va,pte,prot,fault,patype
cmpib,COND(<>),n 0,\spc,\fault
ldil L%(TMPALIAS_MAP_START),\tmp
#if defined(CONFIG_64BIT) && (TMPALIAS_MAP_START >= 0x80000000)
@ -581,11 +581,15 @@
*/
cmpiclr,= 0x01,\tmp,%r0
ldi (_PAGE_DIRTY|_PAGE_READ|_PAGE_WRITE),\prot
#ifdef CONFIG_64BIT
.ifc \patype,20
depd,z \prot,8,7,\prot
#else
.else
.ifc \patype,11
depw,z \prot,8,7,\prot
#endif
.else
.error "undefined PA type to do_alias"
.endif
.endif
/*
* OK, it is in the temp alias region, check whether "from" or "to".
* Check "subtle" note in pacache.S re: r23/r26.
@ -1189,7 +1193,7 @@ dtlb_miss_20w:
nop
dtlb_check_alias_20w:
do_alias spc,t0,t1,va,pte,prot,dtlb_fault
do_alias spc,t0,t1,va,pte,prot,dtlb_fault,20
idtlbt pte,prot
@ -1213,7 +1217,7 @@ nadtlb_miss_20w:
nop
nadtlb_check_alias_20w:
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate,20
idtlbt pte,prot
@ -1245,7 +1249,7 @@ dtlb_miss_11:
nop
dtlb_check_alias_11:
do_alias spc,t0,t1,va,pte,prot,dtlb_fault
do_alias spc,t0,t1,va,pte,prot,dtlb_fault,11
idtlba pte,(va)
idtlbp prot,(va)
@ -1277,7 +1281,7 @@ nadtlb_miss_11:
nop
nadtlb_check_alias_11:
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate,11
idtlba pte,(va)
idtlbp prot,(va)
@ -1304,7 +1308,7 @@ dtlb_miss_20:
nop
dtlb_check_alias_20:
do_alias spc,t0,t1,va,pte,prot,dtlb_fault
do_alias spc,t0,t1,va,pte,prot,dtlb_fault,20
idtlbt pte,prot
@ -1330,7 +1334,7 @@ nadtlb_miss_20:
nop
nadtlb_check_alias_20:
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate
do_alias spc,t0,t1,va,pte,prot,nadtlb_emulate,20
idtlbt pte,prot
@ -1457,7 +1461,7 @@ naitlb_miss_20w:
nop
naitlb_check_alias_20w:
do_alias spc,t0,t1,va,pte,prot,naitlb_fault
do_alias spc,t0,t1,va,pte,prot,naitlb_fault,20
iitlbt pte,prot
@ -1511,7 +1515,7 @@ naitlb_miss_11:
nop
naitlb_check_alias_11:
do_alias spc,t0,t1,va,pte,prot,itlb_fault
do_alias spc,t0,t1,va,pte,prot,itlb_fault,11
iitlba pte,(%sr0, va)
iitlbp prot,(%sr0, va)
@ -1557,7 +1561,7 @@ naitlb_miss_20:
nop
naitlb_check_alias_20:
do_alias spc,t0,t1,va,pte,prot,naitlb_fault
do_alias spc,t0,t1,va,pte,prot,naitlb_fault,20
iitlbt pte,prot