[IA64] MCA recovery based on PSP bits

The determination of whether an MCA is recoverable or not must
be based on the bits set in the PSP (Processor State Parameter).
The specific bits are shown in the Intel IA-64 Architecture Software
Developer's Manual, Vol 2, Table 11-6 Software Recovery Bits in
Processor State Parameter.  Those bits should be consistent
across the entire IA-64 family of processors.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c
index f081c60ab20684234f3e815ef4e520cdd8d75de8..eb860e29341533a6b2d44e90a30f4fa4e6e8c18b 100644 (file)
--- a/arch/ia64/kernel/mca_drv.c
+++ b/arch/ia64/kernel/mca_drv.c
@@ -546,9 +546,20 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
                (pal_processor_state_info_t*)peidx_psp(peidx);
 
        /*
-        * We cannot recover errors with other than bus_check.
+        * Processor recovery status must key off of the PAL recovery
+        * status in the Processor State Parameter.
         */
-       if (psp->cc || psp->rc || psp->uc)
+
+       /*
+        * The machine check is corrected.
+        */
+       if (psp->cm == 1)
+               return 1;
+
+       /*
+        * The error was not contained.  Software must be reset.
+        */
+       if (psp->us || psp->ci == 0)
                return 0;
 
        /*
@@ -569,8 +580,6 @@ recover_from_processor_error(int platform, slidx_table_t *slidx,
                return 0;
        if (pbci->eb && pbci->bsi > 0)
                return 0;
-       if (psp->ci == 0)
-               return 0;
 
        /*
         * This is a local MCA and estimated as recoverble external bus error.