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| author | Michael Ellerman <michael@ellerman.id.au> | 2006-02-28 14:54:26 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-02-28 16:25:55 +1100 |
| commit | 56ec6462af9cba56a04439154e5768672d6f390f (patch) | |
| tree | b2e63269452da95da566d5f675f1f8b277f7f72d /arch/powerpc | |
| parent | 273d2803817c9e050e8d6c3c271db7d61f2fb259 (diff) | |
| download | linux-3.10-56ec6462af9cba56a04439154e5768672d6f390f.tar.gz linux-3.10-56ec6462af9cba56a04439154e5768672d6f390f.tar.bz2 linux-3.10-56ec6462af9cba56a04439154e5768672d6f390f.zip | |
[PATCH] powerpc/iseries: Fix double phys_to_abs bug in htab_bolt_mapping
Before the merge I updated create_pte_mapping() to work for iSeries, by
calling iSeries_hpte_bolt_or_insert. (4c55130b2aa93370f1bf52d2304394e91cf8ee39)
Later we changed iSeries_hpte_insert to cope with the bolting case, and called
that instead from create_pte_mapping() (which was renamed to htab_bolt_mapping)
(3c726f8dee6f55e96475574e9f645327e461884c).
Unfortunately that change introduced a subtle bug, where we pass an absolute
address to iSeries_hpte_insert() where it expects a physical address. This
leads to us calling phys_to_abs() twice on the physical address, which is
seriously bogus.
This only causes a problem if the absolute address from the first translation
can be looked up again in the chunk_map, which depends on the size and layout
of memory. I've seen it fail on one box, but not others.
The minimal fix is to pass the physical address to iSeries_hpte_insert(). For
2.6.17 we should make phys_to_abs() BUG if we try to double-translate an
address.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index b1f614c612d..e9d589eefc1 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -169,7 +169,7 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend, #ifdef CONFIG_PPC_ISERIES if (_machine == PLATFORM_ISERIES_LPAR) ret = iSeries_hpte_insert(hpteg, va, - virt_to_abs(paddr), + __pa(vaddr), tmp_mode, HPTE_V_BOLTED, psize); |