3  * File:	mca.c
4  * Purpose:	Generic MCA handling layer
28  *	      Fixed PAL/SAL update issues, began MCA bug fixes, logging issues,
38  *	      Aligned MCA stack to 16 bytes, added platform vs. CPU error flag,
54  *	      Avoid deadlock when using printk() for MCA and INIT records.
61  *	      Convert MCA/INIT handlers to use per event stacks and SAL/OS
68  *	      Add printing support for MCA/INIT.
98 #include <asm/mca.h>
124 	if ((notify_die((event), "MCA", (regs), (arg), 0, 0)		\
174  * limited & delayed printing support for MCA/INIT handler
182 static DEFINE_SPINLOCK(mlogbuf_wlock);	/* mca context only */
294 		"MCA/INIT might be dodgy or fail.\n");  in ia64_mlogbuf_finish()
349 #define IA64_MAX_LOG_TYPES      4   /* MCA, INIT, CMC, CPE */
391  * Inputs   :   info_type   (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE})
415  *	Get the current MCA log from SAL and copy it into the OS log buffer.
417  *  Inputs  :   info_type   (SAL_INFO_TYPE_{MCA,INIT,CMC,CPE})
458  *  Inputs  :   sal_info_type   (Type of error record MCA/CMC/CPE)
459  *              FIXME: remove MCA and irq_safe.
469 	static const char * const rec_name[] = { "MCA", "INIT", "CMC", "CPE" };  in ia64_mca_log_sal_error_record()
491  *  See if the MCA surfaced in an instruction range
523 /* Given an address, look for it in the mca tables. */
767  *	while the monarch processor does the mca handling and later
829 /* Function pointer for extra MCA recovery */
867 /* Change the comm field on the MCA/INT task to include the pid that
869  * (swapper or nested MCA/INIT) then use the start of the previous comm
961  * that we can do backtrace on the MCA/INIT handler code itself.
994 	/* Best effort attempt to cope with MCA/INIT delivered while in  in ia64_mca_modify_original_stack()
1132 	 * the time of MCA/INIT.  It also does flushrs, so all registers before  in ia64_mca_modify_original_stack()
1133 	 * this function have been written to backing store on the MCA/INIT  in ia64_mca_modify_original_stack()
1169  * so.  In this context, slave includes cpus that respond to the MCA rendezvous
1267  *	This is the place where the core of OS MCA handling is done.
1270  *	monarch processor. Once the monarch is done with MCA handling
1271  *	further MCA logging is enabled by clearing logs.
1277  *	bitmask.  After the first monarch has processed its MCA, it
1280  *	their MCA, the last monarch frees up the rest of the processors.
1300 	mprintk(KERN_INFO "Entered OS MCA handler. PSP=%lx cpu=%d "  in ia64_mca_handler()
1303 	previous_current = ia64_mca_modify_original_stack(regs, sw, sos, "MCA");  in ia64_mca_handler()
1309 		ia64_wait_for_slaves(cpu, "MCA");  in ia64_mca_handler()
1314 		 * MCA handler.  That gets control back to the OS so we can  in ia64_mca_handler()
1326 	/* Get the MCA error record and log it */  in ia64_mca_handler()
1329 	/* MCA error recovery */  in ia64_mca_handler()
1656  * returns.  We can also get INIT slave events for MCA, in which case the MCA
1770 /* Minimal format of the MCA/INIT stacks.  The pseudo processes that run on
1804 /* Do per-CPU MCA-related initialization.  */
1828 			panic("Could not allocate MCA memory for cpu %d\n",  in ia64_mca_cpu_init()
1832 		"MCA", cpu);  in ia64_mca_cpu_init()
1839 	 * We may need it during MCA recovery.  in ia64_mca_cpu_init()
1871  *  Do all the system level mca specific initialization.
1879  *  4. Initialize MCA/CMC/INIT related log buffers maintained by the OS.
1924 			printk(KERN_INFO "Increasing MCA rendezvous timeout from "  in ia64_mca_init()
1947 	IA64_MCA_DEBUG("%s: registered MCA rendezvous spinloop and wakeup mech.\n", __func__);  in ia64_mca_init()
1956 	/* Register the os mca handler with SAL */  in ia64_mca_init()
1963 		printk(KERN_ERR "Failed to register OS MCA handler with SAL "  in ia64_mca_init()
1968 	IA64_MCA_DEBUG("%s: registered OS MCA handler with SAL at 0x%lx, gp = 0x%lx\n", __func__,  in ia64_mca_init()
2004 	 * platform/processor error states for MCA/INIT/CMC  in ia64_mca_init()
2013 	printk(KERN_INFO "MCA related initialization done\n");  in ia64_mca_init()
2036 	/* Setup the MCA rendezvous interrupt vector */  in ia64_mca_irq_init()
2040 	/* Setup the MCA wakeup interrupt vector */  in ia64_mca_irq_init()
2070 	cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/mca:online",  in ia64_mca_late_init()