[S390] ipl/dump on panic.

It is now possible to specify a ccw/fcp dump device which is used to
automatically create a system dump in case of a kernel panic. The dump
device can be configured under /sys/firmware/dump.
In addition it is now possible to specify a ccw/fcp device which is used
for the next reboot of Linux. The reipl device can be configured under
/sys/firmware/reipl.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 57 insertions, 17 deletions

diff --git a/include/asm-s390/cio.h b/include/asm-s390/cio.h
index 28fdd6e2b8ba..da063cd5f0a0 100644
--- a/include/asm-s390/cio.h
+++ b/include/asm-s390/cio.h
@@ -270,6 +270,11 @@ struct diag210 {
 	__u32 vrdccrft : 8;    /* real device feature (output) */
 } __attribute__ ((packed,aligned(4)));
 
+struct ccw_dev_id {
+	u8 ssid;
+	u16 devno;
+};
+
 extern int diag210(struct diag210 *addr);
 
 extern void wait_cons_dev(void);
@@ -280,6 +285,8 @@ extern void cio_reset_channel_paths(void);
 
 extern void css_schedule_reprobe(void);
 
+extern void reipl_ccw_dev(struct ccw_dev_id *id);
+
 #endif
 
 #endif
diff --git a/include/asm-s390/lowcore.h b/include/asm-s390/lowcore.h
index 596c8b172104..2e3d4cca5e21 100644
--- a/include/asm-s390/lowcore.h
+++ b/include/asm-s390/lowcore.h
@@ -47,6 +47,7 @@
 #define __LC_PER_ATMID			0x096
 #define __LC_PER_ADDRESS		0x098
 #define __LC_PER_ACCESS_ID		0x0A1
+#define __LC_AR_MODE_ID			0x0A3
 
 #define __LC_SUBCHANNEL_ID              0x0B8
 #define __LC_SUBCHANNEL_NR              0x0BA
@@ -106,18 +107,28 @@
 #define __LC_INT_CLOCK			0xDE8
 #endif /* __s390x__ */
 
-#define __LC_PANIC_MAGIC                0xE00
 
+#define __LC_PANIC_MAGIC		0xE00
 #ifndef __s390x__
 #define __LC_PFAULT_INTPARM             0x080
 #define __LC_CPU_TIMER_SAVE_AREA        0x0D8
+#define __LC_CLOCK_COMP_SAVE_AREA	0x0E0
+#define __LC_PSW_SAVE_AREA		0x100
+#define __LC_PREFIX_SAVE_AREA		0x108
 #define __LC_AREGS_SAVE_AREA            0x120
+#define __LC_FPREGS_SAVE_AREA		0x160
 #define __LC_GPREGS_SAVE_AREA           0x180
 #define __LC_CREGS_SAVE_AREA            0x1C0
 #else /* __s390x__ */
 #define __LC_PFAULT_INTPARM             0x11B8
+#define __LC_FPREGS_SAVE_AREA		0x1200
 #define __LC_GPREGS_SAVE_AREA           0x1280
+#define __LC_PSW_SAVE_AREA		0x1300
+#define __LC_PREFIX_SAVE_AREA		0x1318
+#define __LC_FP_CREG_SAVE_AREA		0x131C
+#define __LC_TODREG_SAVE_AREA		0x1324
 #define __LC_CPU_TIMER_SAVE_AREA        0x1328
+#define __LC_CLOCK_COMP_SAVE_AREA	0x1331
 #define __LC_AREGS_SAVE_AREA            0x1340
 #define __LC_CREGS_SAVE_AREA            0x1380
 #endif /* __s390x__ */
diff --git a/include/asm-s390/setup.h b/include/asm-s390/setup.h
index 02c96d57f0cf..4a1126d8439a 100644
--- a/include/asm-s390/setup.h
+++ b/include/asm-s390/setup.h
@@ -68,39 +68,59 @@ extern unsigned int console_irq;
 #define SET_CONSOLE_3215	do { console_mode = 2; } while (0)
 #define SET_CONSOLE_3270	do { console_mode = 3; } while (0)
 
-struct ipl_list_header {
-	u32 length;
-	u8  reserved[3];
+
+struct ipl_list_hdr {
+	u32 len;
+	u8  reserved1[3];
 	u8  version;
+	u32 blk0_len;
+	u8  pbt;
+	u8  flags;
+	u16 reserved2;
 } __attribute__((packed));
 
 struct ipl_block_fcp {
-	u32 length;
-	u8  pbt;
-	u8  reserved1[322-1];
+	u8  reserved1[313-1];
+	u8  opt;
+	u8  reserved2[3];
+	u16 reserved3;
 	u16 devno;
-	u8  reserved2[4];
+	u8  reserved4[4];
 	u64 wwpn;
 	u64 lun;
 	u32 bootprog;
-	u8  reserved3[12];
+	u8  reserved5[12];
 	u64 br_lba;
 	u32 scp_data_len;
-	u8  reserved4[260];
+	u8  reserved6[260];
 	u8  scp_data[];
 } __attribute__((packed));
 
+struct ipl_block_ccw {
+	u8  load_param[8];
+	u8  reserved1[84];
+	u8  reserved2[2];
+	u16 devno;
+	u8  vm_flags;
+	u8  reserved3[3];
+	u32 vm_parm_len;
+} __attribute__((packed));
+
 struct ipl_parameter_block {
+	struct ipl_list_hdr hdr;
 	union {
-		u32 length;
-		struct ipl_list_header header;
-	} hdr;
-	struct ipl_block_fcp fcp;
+		struct ipl_block_fcp fcp;
+		struct ipl_block_ccw ccw;
+	} ipl_info;
 } __attribute__((packed));
 
-#define IPL_MAX_SUPPORTED_VERSION (0)
+#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
+			      sizeof(struct ipl_block_fcp))
 
-#define IPL_TYPE_FCP (0)
+#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
+			      sizeof(struct ipl_block_ccw))
+
+#define IPL_MAX_SUPPORTED_VERSION (0)
 
 /*
  * IPL validity flags and parameters as detected in head.S
@@ -108,12 +128,14 @@ struct ipl_parameter_block {
 extern u32 ipl_parameter_flags;
 extern u16 ipl_devno;
 
+void do_reipl(void);
+
 #define IPL_DEVNO_VALID		(ipl_parameter_flags & 1)
 #define IPL_PARMBLOCK_VALID	(ipl_parameter_flags & 2)
 
 #define IPL_PARMBLOCK_START	((struct ipl_parameter_block *) \
 				 IPL_PARMBLOCK_ORIGIN)
-#define IPL_PARMBLOCK_SIZE	(IPL_PARMBLOCK_START->hdr.length)
+#define IPL_PARMBLOCK_SIZE	(IPL_PARMBLOCK_START->hdr.len)
 
 #else /* __ASSEMBLY__ */