diff options
| author | Anton Blanchard <anton@samba.org> | 2010-02-07 19:37:29 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-02-09 13:56:24 +1100 |
| commit | 44c9f3cc1a07503b653b571eac5792436da39a30 (patch) | |
| tree | df99ffef915bf949b112e24323e6bf80139d94d3 | |
| parent | 8354be9c104db8e92bb079e29540fbafb7f09b5c (diff) | |
powerpc: Clear MSR_RI during RTAS calls
RTAS should never cause an exception but if it does (for example accessing
outside our RMO) then we might go a long way through the kernel before
oopsing. If we unset MSR_RI we should at least stop things on exception
exit.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index bdcb557d470..07109d84378 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -791,9 +791,8 @@ _GLOBAL(enter_rtas) li r9,1 rldicr r9,r9,MSR_SF_LG,(63-MSR_SF_LG) - ori r9,r9,MSR_IR|MSR_DR|MSR_FE0|MSR_FE1|MSR_FP + ori r9,r9,MSR_IR|MSR_DR|MSR_FE0|MSR_FE1|MSR_FP|MSR_RI andc r6,r0,r9 - ori r6,r6,MSR_RI sync /* disable interrupts so SRR0/1 */ mtmsrd r0 /* don't get trashed */ |