Messages in this thread Patch in this message | | | Date | Fri, 4 Jun 2004 15:40:23 +1000 | From | Paul Mackerras <> | Subject | [PATCH][PPC64] Don't clear MSR.RI in do_hash_page_DSI |
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Some code that is used on iSeries (do_hash_page_DSI in head.S) was clearing the RI (recoverable interrupt) bit in the MSR when it shouldn't. We were getting SLB miss interrupts following that which were panicking because they appeared to have occurred at a bad place. This patch fixes the problem. In fact it isn't necessary for do_hash_page_DSI to do anything to RI, so the patch changes the code to not set or clear it.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Please apply.
Thanks, Paul. diff -urN linux-2.5/arch/ppc64/kernel/head.S test25/arch/ppc64/kernel/head.S --- linux-2.5/arch/ppc64/kernel/head.S 2004-06-04 07:19:00.000000000 +1000 +++ test25/arch/ppc64/kernel/head.S 2004-06-04 15:31:30.744946352 +1000 @@ -926,8 +926,8 @@ stb r0,PACAPROCENABLED(r20) /* Soft Disabled */ mfmsr r0 - ori r0,r0,MSR_EE+MSR_RI - mtmsrd r0 /* Hard Enable, RI on */ + ori r0,r0,MSR_EE + mtmsrd r0,1 /* Hard Enable */ #endif /* @@ -946,9 +946,9 @@ */ mfmsr r0 li r4,0 - ori r4,r4,MSR_EE+MSR_RI + ori r4,r4,MSR_EE andc r0,r0,r4 - mtmsrd r0 /* Hard Disable, RI off */ + mtmsrd r0,1 /* Hard Disable */ ld r0,SOFTE(r1) cmpdi 0,r0,0 /* See if we will soft enable in */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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