Commit 44c9f3cc authored by Anton Blanchard's avatar Anton Blanchard Committed by Benjamin Herrenschmidt

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: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 8354be9c
...@@ -791,9 +791,8 @@ _GLOBAL(enter_rtas) ...@@ -791,9 +791,8 @@ _GLOBAL(enter_rtas)
li r9,1 li r9,1
rldicr r9,r9,MSR_SF_LG,(63-MSR_SF_LG) 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 andc r6,r0,r9
ori r6,r6,MSR_RI
sync /* disable interrupts so SRR0/1 */ sync /* disable interrupts so SRR0/1 */
mtmsrd r0 /* don't get trashed */ mtmsrd r0 /* don't get trashed */
......
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