s390: improved machine check handling.

63 lines not on this page · raw message

diff -urpN linux-2.6/arch/s390/kernel/setup.c linux-2.6-patched/arch/s390/kernel/setup.c
@@ -414,7 +414,8 @@ setup_lowcore(void)
 	lc->program_new_psw.mask = PSW_KERNEL_BITS;
 	lc->program_new_psw.addr =
 		PSW_ADDR_AMODE | (unsigned long)pgm_check_handler;
-	lc->mcck_new_psw.mask = PSW_KERNEL_BITS;
+	lc->mcck_new_psw.mask =
+		PSW_KERNEL_BITS & ~PSW_MASK_MCHECK & ~PSW_MASK_DAT;
 	lc->mcck_new_psw.addr =
 		PSW_ADDR_AMODE | (unsigned long) mcck_int_handler;
 	lc->io_new_psw.mask = PSW_KERNEL_BITS;

@@ -424,12 +425,18 @@ setup_lowcore(void)
 	lc->kernel_stack = ((unsigned long) &init_thread_union) + THREAD_SIZE;
 	lc->async_stack = (unsigned long)
 		__alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0) + ASYNC_SIZE;
-#ifdef CONFIG_CHECK_STACK
 	lc->panic_stack = (unsigned long)
 		__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
-#endif
 	lc->current_task = (unsigned long) init_thread_union.thread_info.task;
 	lc->thread_info = (unsigned long) &init_thread_union;
+#ifndef CONFIG_ARCH_S390X
+	if (MACHINE_HAS_IEEE) {
+		lc->extended_save_area_addr = (__u32)
+			__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0);
+		/* enable extended save area */
+		ctl_set_bit(14, 29);
+	}
+#endif
 #ifdef CONFIG_ARCH_S390X
 	if (MACHINE_HAS_DIAG44)
 		lc->diag44_opcode = 0x83000044;

diff -urpN linux-2.6/arch/s390/kernel/smp.c linux-2.6-patched/arch/s390/kernel/smp.c
@@ -771,13 +771,24 @@ void __init smp_prepare_cpus(unsigned in
 
 		*(lowcore_ptr[i]) = S390_lowcore;
 		lowcore_ptr[i]->async_stack = stack + (ASYNC_SIZE);
-#ifdef CONFIG_CHECK_STACK
 		stack = __get_free_pages(GFP_KERNEL,0);
 		if (stack == 0ULL)
 			panic("smp_boot_cpus failed to allocate memory\n");
 		lowcore_ptr[i]->panic_stack = stack + (PAGE_SIZE);
+#ifndef __s390x__
+		if (MACHINE_HAS_IEEE) {
+			lowcore_ptr[i]->extended_save_area_addr =
+				(__u32) __get_free_pages(GFP_KERNEL,0);
+			if (lowcore_ptr[i]->extended_save_area_addr == 0)
+				panic("smp_boot_cpus failed to "
+				      "allocate memory\n");
+		}
 #endif
 	}
+#ifndef __s390x__
+	if (MACHINE_HAS_IEEE)
+		ctl_set_bit(14, 29); /* enable extended save area */
+#endif
 	set_prefix((u32)(unsigned long) lowcore_ptr[smp_processor_id()]);
 
 	for_each_cpu(cpu)

363 lines not on this page · raw message

diff -urpN linux-2.6/drivers/s390/s390mach.h linux-2.6-patched/drivers/s390/s390mach.h
@@ -16,20 +16,45 @@ struct mci {
 	__u32   sd              :  1; /* 00 system damage */
 	__u32   pd              :  1; /* 01 instruction-processing damage */
 	__u32   sr              :  1; /* 02 system recovery */
-	__u32   to_be_defined_1 :  4; /* 03-06 */
+	__u32   to_be_defined_1 :  1; /* 03 */
+	__u32   cd              :  1; /* 04 timing-facility damage */
+	__u32   ed              :  1; /* 05 external damage */
+	__u32   to_be_defined_2 :  1; /* 06 */
 	__u32   dg              :  1; /* 07 degradation */
 	__u32   w               :  1; /* 08 warning pending */
 	__u32   cp              :  1; /* 09 channel-report pending */
-	__u32   to_be_defined_2 :  6; /* 10-15 */
+	__u32   sp              :  1; /* 10 service-processor damage */
+	__u32   ck              :  1; /* 11 channel-subsystem damage */
+	__u32   to_be_defined_3 :  2; /* 12-13 */
+	__u32   b               :  1; /* 14 backed up */
+	__u32   to_be_defined_4 :  1; /* 15 */
 	__u32   se              :  1; /* 16 storage error uncorrected */
 	__u32   sc              :  1; /* 17 storage error corrected */
 	__u32   ke              :  1; /* 18 storage-key error uncorrected */
 	__u32   ds              :  1; /* 19 storage degradation */
-	__u32	to_be_defined_3 :  4; /* 20-23 */
+	__u32   wp              :  1; /* 20 psw mwp validity */
+	__u32   ms              :  1; /* 21 psw mask and key validity */
+	__u32   pm              :  1; /* 22 psw program mask and cc validity */
+	__u32   ia              :  1; /* 23 psw instruction address validity */
 	__u32   fa              :  1; /* 24 failing storage address validity */
-	__u32   to_be_defined_4 :  7; /* 25-31 */
+	__u32   to_be_defined_5 :  1; /* 25 */
+	__u32   ec              :  1; /* 26 external damage code validity */
+	__u32   fp              :  1; /* 27 floating point register validity */
+	__u32   gr              :  1; /* 28 general register validity */
+	__u32   cr              :  1; /* 29 control register validity */
+	__u32   to_be_defined_6 :  1; /* 30 */
+	__u32   st              :  1; /* 31 storage logical validity */
 	__u32   ie              :  1; /* 32 indirect storage error */
-	__u32	to_be_defined_5 : 31; /* 33-63 */
+	__u32   ar              :  1; /* 33 access register validity */
+	__u32   da              :  1; /* 34 delayed access exception */
+	__u32   to_be_defined_7 :  7; /* 35-41 */
+	__u32   pr              :  1; /* 42 tod programmable register validity */
+	__u32   fc              :  1; /* 43 fp control register validity */
+	__u32   ap              :  1; /* 44 ancillary report */
+	__u32   to_be_defined_8 :  1; /* 45 */
+	__u32   ct              :  1; /* 46 cpu timer validity */
+	__u32   cc              :  1; /* 47 clock comparator validity */
+	__u32	to_be_defined_9 : 16; /* 47-63 */
 };
 
 /*

diff -urpN linux-2.6/include/asm-s390/lowcore.h linux-2.6-patched/include/asm-s390/lowcore.h
@@ -109,10 +109,14 @@
 
 #ifndef __s390x__
 #define __LC_PFAULT_INTPARM             0x080
+#define __LC_CPU_TIMER_SAVE_AREA        0x0D8
 #define __LC_AREGS_SAVE_AREA            0x120
+#define __LC_GPREGS_SAVE_AREA           0x180
 #define __LC_CREGS_SAVE_AREA            0x1C0
 #else /* __s390x__ */
 #define __LC_PFAULT_INTPARM             0x11B8
+#define __LC_GPREGS_SAVE_AREA           0x1280
+#define __LC_CPU_TIMER_SAVE_AREA        0x1328
 #define __LC_AREGS_SAVE_AREA            0x1340
 #define __LC_CREGS_SAVE_AREA            0x1380
 #endif /* __s390x__ */

@@ -167,7 +171,8 @@ struct _lowcore
 	__u16        subchannel_nr;            /* 0x0ba */
 	__u32        io_int_parm;              /* 0x0bc */
 	__u32        io_int_word;              /* 0x0c0 */
-        __u8         pad3[0xD8-0xC4];          /* 0x0c4 */
+        __u8         pad3[0xD4-0xC4];          /* 0x0c4 */
+	__u32        extended_save_area_addr;  /* 0x0d4 */
 	__u32        cpu_timer_save_area[2];   /* 0x0d8 */
 	__u32        clock_comp_save_area[2];  /* 0x0e0 */
 	__u32        mcck_interruption_code[2]; /* 0x0e8 */

91 lines not on this page · raw message

diff -urpN linux-2.6/include/asm-s390/ptrace.h linux-2.6-patched/include/asm-s390/ptrace.h
@@ -276,7 +276,7 @@ typedef struct 
 #endif /* __s390x__ */
 
 #define PSW_KERNEL_BITS	(PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_PRIMARY | \
-			 PSW_DEFAULT_KEY)
+			 PSW_MASK_MCHECK | PSW_DEFAULT_KEY)
 #define PSW_USER_BITS	(PSW_BASE_BITS | PSW_MASK_DAT | PSW_ASC_HOME | \
 			 PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK | \
 			 PSW_MASK_PSTATE | PSW_DEFAULT_KEY)

diff -urpN linux-2.6/include/asm-s390/system.h linux-2.6-patched/include/asm-s390/system.h
@@ -16,6 +16,7 @@
 #include <asm/types.h>
 #include <asm/ptrace.h>
 #include <asm/setup.h>
+#include <asm/processor.h>
 
 #ifdef __KERNEL__
 

@@ -331,9 +332,6 @@ __cmpxchg(volatile void *ptr, unsigned l
 
 #ifdef __s390x__
 
-#define __load_psw(psw) \
-        __asm__ __volatile__("lpswe 0(%0)" : : "a" (&psw), "m" (psw) : "cc" );
-
 #define __ctl_load(array, low, high) ({ \
 	typedef struct { char _[sizeof(array)]; } addrtype; \
 	__asm__ __volatile__ ( \

@@ -390,9 +388,6 @@ __cmpxchg(volatile void *ptr, unsigned l
 
 #else /* __s390x__ */
 
-#define __load_psw(psw) \
-	__asm__ __volatile__("lpsw 0(%0)" : : "a" (&psw) : "cc" );
-
 #define __ctl_load(array, low, high) ({ \
 	typedef struct { char _[sizeof(array)]; } addrtype; \
 	__asm__ __volatile__ ( \

@@ -451,6 +446,20 @@ __cmpxchg(volatile void *ptr, unsigned l
 /* For spinlocks etc */
 #define local_irq_save(x)	((x) = local_irq_disable())
 
+/*
+ * Use to set psw mask except for the first byte which
+ * won't be changed by this function.
+ */
+static inline void
+__set_psw_mask(unsigned long mask)
+{
+	local_save_flags(mask);
+	__load_psw_mask(mask);
+}
+
+#define local_mcck_enable()  __set_psw_mask(PSW_KERNEL_BITS)
+#define local_mcck_disable() __set_psw_mask(PSW_KERNEL_BITS & ~PSW_MASK_MCHECK)
+
 #ifdef CONFIG_SMP
 
 extern void smp_ctl_set_bit(int cr, int bit);

diff -urpN linux-2.6/include/asm-s390/thread_info.h linux-2.6-patched/include/asm-s390/thread_info.h
@@ -96,6 +96,7 @@ static inline struct thread_info *curren
 #define TIF_RESTART_SVC		4	/* restart svc with new svc number */
 #define TIF_SYSCALL_AUDIT	5	/* syscall auditing active */
 #define TIF_SINGLE_STEP		6	/* deliver sigtrap on return to user */
+#define TIF_MCCK_PENDING	7	/* machine check handling is pending */
 #define TIF_USEDFPU		16	/* FPU was used by this task this quantum (SMP) */
 #define TIF_POLLING_NRFLAG	17	/* true if poll_idle() is polling 
 					   TIF_NEED_RESCHED */

@@ -109,6 +110,7 @@ static inline struct thread_info *curren
 #define _TIF_RESTART_SVC	(1<<TIF_RESTART_SVC)
 #define _TIF_SYSCALL_AUDIT	(1<<TIF_SYSCALL_AUDIT)
 #define _TIF_SINGLE_STEP	(1<<TIF_SINGLE_STEP)
+#define _TIF_MCCK_PENDING	(1<<TIF_MCCK_PENDING)
 #define _TIF_USEDFPU		(1<<TIF_USEDFPU)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
 #define _TIF_31BIT		(1<<TIF_31BIT)