a62bc07392
With this patch for kdump the s390 vector registers are stored into the prepared save areas in the old kernel and into the REGSET_VX_LOW and REGSET_VX_HIGH ELF notes for /proc/vmcore in the new kernel. The NT_S390_VXRS_LOW note contains the lower halves of the first 16 vector registers 0-15. The higher halves are stored in the floating point register ELF note. The NT_S390_VXRS_HIGH contains the full vector registers 16-31. The kernel provides a save area for storing vector register in case of machine checks. A pointer to this save are is stored in the CPU lowcore at offset 0x11b0. This save area is also used to save the registers for kdump. In case of a dumped crashed kdump those areas are used to extract the registers of the production system. The vector registers for remote CPUs are stored using the "store additional status at address" SIGP. For the dump CPU the vector registers are stored with the VSTM instruction. With this patch also zfcpdump stores the vector registers. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef __S390_ASM_SIGP_H
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#define __S390_ASM_SIGP_H
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/* SIGP order codes */
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#define SIGP_SENSE 1
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#define SIGP_EXTERNAL_CALL 2
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#define SIGP_EMERGENCY_SIGNAL 3
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#define SIGP_START 4
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#define SIGP_STOP 5
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#define SIGP_RESTART 6
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#define SIGP_STOP_AND_STORE_STATUS 9
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#define SIGP_INITIAL_CPU_RESET 11
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#define SIGP_SET_PREFIX 13
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#define SIGP_STORE_STATUS_AT_ADDRESS 14
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#define SIGP_SET_ARCHITECTURE 18
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#define SIGP_COND_EMERGENCY_SIGNAL 19
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#define SIGP_SENSE_RUNNING 21
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#define SIGP_STORE_ADDITIONAL_STATUS 23
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/* SIGP condition codes */
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#define SIGP_CC_ORDER_CODE_ACCEPTED 0
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#define SIGP_CC_STATUS_STORED 1
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#define SIGP_CC_BUSY 2
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#define SIGP_CC_NOT_OPERATIONAL 3
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/* SIGP cpu status bits */
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#define SIGP_STATUS_CHECK_STOP 0x00000010UL
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#define SIGP_STATUS_STOPPED 0x00000040UL
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#define SIGP_STATUS_EXT_CALL_PENDING 0x00000080UL
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#define SIGP_STATUS_INVALID_PARAMETER 0x00000100UL
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#define SIGP_STATUS_INCORRECT_STATE 0x00000200UL
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#define SIGP_STATUS_NOT_RUNNING 0x00000400UL
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#ifndef __ASSEMBLY__
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static inline int __pcpu_sigp(u16 addr, u8 order, unsigned long parm,
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u32 *status)
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{
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register unsigned long reg1 asm ("1") = parm;
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int cc;
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asm volatile(
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" sigp %1,%2,0(%3)\n"
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" ipm %0\n"
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" srl %0,28\n"
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: "=d" (cc), "+d" (reg1) : "d" (addr), "a" (order) : "cc");
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if (status && cc == 1)
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*status = reg1;
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return cc;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __S390_ASM_SIGP_H */
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