diff options
Diffstat (limited to 'drivers/s390/s390mach.c')
| -rw-r--r-- | drivers/s390/s390mach.c | 66 |
1 files changed, 47 insertions, 19 deletions
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c index 4191fd9d4d1..3bf46660351 100644 --- a/drivers/s390/s390mach.c +++ b/drivers/s390/s390mach.c @@ -23,7 +23,7 @@ static struct semaphore m_sem; -extern int css_process_crw(int); +extern int css_process_crw(int, int); extern int chsc_process_crw(void); extern int chp_process_crw(int, int); extern void css_reiterate_subchannels(void); @@ -49,9 +49,10 @@ s390_handle_damage(char *msg) static int s390_collect_crw_info(void *param) { - struct crw crw; + struct crw crw[2]; int ccode, ret, slow; struct semaphore *sem; + unsigned int chain; sem = (struct semaphore *)param; /* Set a nice name. */ @@ -59,25 +60,50 @@ s390_collect_crw_info(void *param) repeat: down_interruptible(sem); slow = 0; + chain = 0; while (1) { - ccode = stcrw(&crw); + if (unlikely(chain > 1)) { + struct crw tmp_crw; + + printk(KERN_WARNING"%s: Code does not support more " + "than two chained crws; please report to " + "linux390@de.ibm.com!\n", __FUNCTION__); + ccode = stcrw(&tmp_crw); + printk(KERN_WARNING"%s: crw reports slct=%d, oflw=%d, " + "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", + __FUNCTION__, tmp_crw.slct, tmp_crw.oflw, + tmp_crw.chn, tmp_crw.rsc, tmp_crw.anc, + tmp_crw.erc, tmp_crw.rsid); + printk(KERN_WARNING"%s: This was crw number %x in the " + "chain\n", __FUNCTION__, chain); + if (ccode != 0) + break; + chain = tmp_crw.chn ? chain + 1 : 0; + continue; + } + ccode = stcrw(&crw[chain]); if (ccode != 0) break; DBG(KERN_DEBUG "crw_info : CRW reports slct=%d, oflw=%d, " "chn=%d, rsc=%X, anc=%d, erc=%X, rsid=%X\n", - crw.slct, crw.oflw, crw.chn, crw.rsc, crw.anc, - crw.erc, crw.rsid); + crw[chain].slct, crw[chain].oflw, crw[chain].chn, + crw[chain].rsc, crw[chain].anc, crw[chain].erc, + crw[chain].rsid); /* Check for overflows. */ - if (crw.oflw) { + if (crw[chain].oflw) { pr_debug("%s: crw overflow detected!\n", __FUNCTION__); css_reiterate_subchannels(); + chain = 0; slow = 1; continue; } - switch (crw.rsc) { + switch (crw[chain].rsc) { case CRW_RSC_SCH: - pr_debug("source is subchannel %04X\n", crw.rsid); - ret = css_process_crw (crw.rsid); + if (crw[0].chn && !chain) + break; + pr_debug("source is subchannel %04X\n", crw[0].rsid); + ret = css_process_crw (crw[0].rsid, + chain ? crw[1].rsid : 0); if (ret == -EAGAIN) slow = 1; break; @@ -85,18 +111,18 @@ repeat: pr_debug("source is monitoring facility\n"); break; case CRW_RSC_CPATH: - pr_debug("source is channel path %02X\n", crw.rsid); - switch (crw.erc) { + pr_debug("source is channel path %02X\n", crw[0].rsid); + switch (crw[0].erc) { case CRW_ERC_IPARM: /* Path has come. */ - ret = chp_process_crw(crw.rsid, 1); + ret = chp_process_crw(crw[0].rsid, 1); break; case CRW_ERC_PERRI: /* Path has gone. */ case CRW_ERC_PERRN: - ret = chp_process_crw(crw.rsid, 0); + ret = chp_process_crw(crw[0].rsid, 0); break; default: pr_debug("Don't know how to handle erc=%x\n", - crw.erc); + crw[0].erc); ret = 0; } if (ret == -EAGAIN) @@ -115,6 +141,8 @@ repeat: pr_debug("unknown source\n"); break; } + /* chain is always 0 or 1 here. */ + chain = crw[chain].chn ? chain + 1 : 0; } if (slow) queue_work(slow_path_wq, &slow_path_work); @@ -218,7 +246,7 @@ s390_revalidate_registers(struct mci *mci) */ kill_task = 1; -#ifndef __s390x__ +#ifndef CONFIG_64BIT asm volatile("ld 0,0(%0)\n" "ld 2,8(%0)\n" "ld 4,16(%0)\n" @@ -227,7 +255,7 @@ s390_revalidate_registers(struct mci *mci) #endif if (MACHINE_HAS_IEEE) { -#ifdef __s390x__ +#ifdef CONFIG_64BIT fpt_save_area = &S390_lowcore.floating_pt_save_area; fpt_creg_save_area = &S390_lowcore.fpt_creg_save_area; #else @@ -286,7 +314,7 @@ s390_revalidate_registers(struct mci *mci) */ s390_handle_damage("invalid control registers."); else -#ifdef __s390x__ +#ifdef CONFIG_64BIT asm volatile("lctlg 0,15,0(%0)" : : "a" (&S390_lowcore.cregs_save_area)); #else @@ -299,7 +327,7 @@ s390_revalidate_registers(struct mci *mci) * can't write something sensible into that register. */ -#ifdef __s390x__ +#ifdef CONFIG_64BIT /* * See if we can revalidate the TOD programmable register with its * old contents (should be zero) otherwise set it to zero. @@ -356,7 +384,7 @@ s390_do_machine_check(struct pt_regs *regs) if (mci->b) { /* Processing backup -> verify if we can survive this */ u64 z_mcic, o_mcic, t_mcic; -#ifdef __s390x__ +#ifdef CONFIG_64BIT z_mcic = (1ULL<<63 | 1ULL<<59 | 1ULL<<29); o_mcic = (1ULL<<43 | 1ULL<<42 | 1ULL<<41 | 1ULL<<40 | 1ULL<<36 | 1ULL<<35 | 1ULL<<34 | 1ULL<<32 | |