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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c929500d7a
Add the logic to check if the machine check happens when the guest is running. If yes, set the exit reason -EINTR in the machine check's interrupt handler. Refactor s390_do_machine_check to avoid panicing the host for some kinds of machine checks which happen when guest is running. Reinject the instruction processing damage's machine checks including Delayed Access Exception instead of damaging the host if it happens in the guest because it could be caused by improper update on TLB entry or other software case and impacts the guest only. Signed-off-by: QingFeng Hao <haoqf@linux.vnet.ibm.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/*
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* Machine check handler definitions
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*
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* Copyright IBM Corp. 2000, 2009
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* Author(s): Ingo Adlung <adlung@de.ibm.com>,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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* Cornelia Huck <cornelia.huck@de.ibm.com>,
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* Heiko Carstens <heiko.carstens@de.ibm.com>,
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*/
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#ifndef _ASM_S390_NMI_H
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#define _ASM_S390_NMI_H
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#include <linux/const.h>
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#include <linux/types.h>
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#define MCIC_SUBCLASS_MASK (1ULL<<63 | 1ULL<<62 | 1ULL<<61 | \
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1ULL<<59 | 1ULL<<58 | 1ULL<<56 | \
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1ULL<<55 | 1ULL<<54 | 1ULL<<53 | \
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1ULL<<52 | 1ULL<<47 | 1ULL<<46 | \
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1ULL<<45 | 1ULL<<44)
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#define MCCK_CODE_SYSTEM_DAMAGE _BITUL(63)
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#define MCCK_CODE_EXT_DAMAGE _BITUL(63 - 5)
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#define MCCK_CODE_CP _BITUL(63 - 9)
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#define MCCK_CODE_CPU_TIMER_VALID _BITUL(63 - 46)
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#define MCCK_CODE_PSW_MWP_VALID _BITUL(63 - 20)
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#define MCCK_CODE_PSW_IA_VALID _BITUL(63 - 23)
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#ifndef __ASSEMBLY__
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union mci {
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unsigned long val;
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struct {
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u64 sd : 1; /* 00 system damage */
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u64 pd : 1; /* 01 instruction-processing damage */
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u64 sr : 1; /* 02 system recovery */
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u64 : 1; /* 03 */
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u64 cd : 1; /* 04 timing-facility damage */
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u64 ed : 1; /* 05 external damage */
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u64 : 1; /* 06 */
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u64 dg : 1; /* 07 degradation */
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u64 w : 1; /* 08 warning pending */
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u64 cp : 1; /* 09 channel-report pending */
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u64 sp : 1; /* 10 service-processor damage */
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u64 ck : 1; /* 11 channel-subsystem damage */
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u64 : 2; /* 12-13 */
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u64 b : 1; /* 14 backed up */
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u64 : 1; /* 15 */
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u64 se : 1; /* 16 storage error uncorrected */
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u64 sc : 1; /* 17 storage error corrected */
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u64 ke : 1; /* 18 storage-key error uncorrected */
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u64 ds : 1; /* 19 storage degradation */
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u64 wp : 1; /* 20 psw mwp validity */
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u64 ms : 1; /* 21 psw mask and key validity */
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u64 pm : 1; /* 22 psw program mask and cc validity */
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u64 ia : 1; /* 23 psw instruction address validity */
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u64 fa : 1; /* 24 failing storage address validity */
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u64 vr : 1; /* 25 vector register validity */
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u64 ec : 1; /* 26 external damage code validity */
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u64 fp : 1; /* 27 floating point register validity */
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u64 gr : 1; /* 28 general register validity */
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u64 cr : 1; /* 29 control register validity */
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u64 : 1; /* 30 */
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u64 st : 1; /* 31 storage logical validity */
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u64 ie : 1; /* 32 indirect storage error */
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u64 ar : 1; /* 33 access register validity */
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u64 da : 1; /* 34 delayed access exception */
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u64 : 1; /* 35 */
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u64 gs : 1; /* 36 guarded storage registers */
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u64 : 5; /* 37-41 */
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u64 pr : 1; /* 42 tod programmable register validity */
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u64 fc : 1; /* 43 fp control register validity */
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u64 ap : 1; /* 44 ancillary report */
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u64 : 1; /* 45 */
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u64 ct : 1; /* 46 cpu timer validity */
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u64 cc : 1; /* 47 clock comparator validity */
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u64 : 16; /* 47-63 */
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};
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};
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#define MCESA_ORIGIN_MASK (~0x3ffUL)
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#define MCESA_LC_MASK (0xfUL)
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struct mcesa {
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u8 vector_save_area[1024];
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u8 guarded_storage_save_area[32];
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};
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struct pt_regs;
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extern void s390_handle_mcck(void);
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extern void s390_do_machine_check(struct pt_regs *regs);
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_S390_NMI_H */
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