mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
1592a8e456
It turned out that SIGP set-multi-threading can only be done once. Therefore switching to a different MT level after switching to sclp.mtid_prev in the dump case fails. As a symptom specifying the "nosmt" parameter currently fails for the kdump kernel and the kernel starts with multi-threading enabled. So fix this and issue diag 308 subcode 1 call after collecting the CPU states for the dump. Also enhance the diag308_reset() function to be usable also with enabled lowcore protection and prefix register != 0. After the reset it is possible to switch the MT level again. We have to do the reset very early in order not to kill the already initialized console. Therefore instead of kmalloc() the corresponding memblock functions have to be used. To avoid copying the sclp cpu code into sclp_early, we now use the simple sigp loop method for CPU detection. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
182 lines
3.4 KiB
C
182 lines
3.4 KiB
C
/*
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* s390 (re)ipl support
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*
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* Copyright IBM Corp. 2007
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*/
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#ifndef _ASM_S390_IPL_H
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#define _ASM_S390_IPL_H
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#include <asm/lowcore.h>
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#include <asm/types.h>
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#include <asm/cio.h>
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#include <asm/setup.h>
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#define IPL_PARMBLOCK_ORIGIN 0x2000
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#define IPL_PARM_BLK_FCP_LEN (sizeof(struct ipl_list_hdr) + \
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sizeof(struct ipl_block_fcp))
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#define IPL_PARM_BLK0_FCP_LEN (sizeof(struct ipl_block_fcp) + 16)
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#define IPL_PARM_BLK_CCW_LEN (sizeof(struct ipl_list_hdr) + \
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sizeof(struct ipl_block_ccw))
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#define IPL_PARM_BLK0_CCW_LEN (sizeof(struct ipl_block_ccw) + 16)
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#define IPL_MAX_SUPPORTED_VERSION (0)
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#define IPL_PARMBLOCK_START ((struct ipl_parameter_block *) \
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IPL_PARMBLOCK_ORIGIN)
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#define IPL_PARMBLOCK_SIZE (IPL_PARMBLOCK_START->hdr.len)
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struct ipl_list_hdr {
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u32 len;
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u8 reserved1[3];
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u8 version;
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u32 blk0_len;
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u8 pbt;
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u8 flags;
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u16 reserved2;
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u8 loadparm[8];
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} __attribute__((packed));
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struct ipl_block_fcp {
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u8 reserved1[305-1];
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u8 opt;
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u8 reserved2[3];
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u16 reserved3;
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u16 devno;
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u8 reserved4[4];
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u64 wwpn;
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u64 lun;
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u32 bootprog;
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u8 reserved5[12];
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u64 br_lba;
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u32 scp_data_len;
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u8 reserved6[260];
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u8 scp_data[];
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} __attribute__((packed));
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#define DIAG308_VMPARM_SIZE 64
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#define DIAG308_SCPDATA_SIZE (PAGE_SIZE - (sizeof(struct ipl_list_hdr) + \
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offsetof(struct ipl_block_fcp, scp_data)))
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struct ipl_block_ccw {
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u8 reserved1[84];
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u8 reserved2[2];
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u16 devno;
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u8 vm_flags;
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u8 reserved3[3];
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u32 vm_parm_len;
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u8 nss_name[8];
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u8 vm_parm[DIAG308_VMPARM_SIZE];
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u8 reserved4[8];
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} __attribute__((packed));
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struct ipl_parameter_block {
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struct ipl_list_hdr hdr;
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union {
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struct ipl_block_fcp fcp;
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struct ipl_block_ccw ccw;
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} ipl_info;
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} __attribute__((packed,aligned(4096)));
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/*
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* IPL validity flags
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*/
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extern u32 ipl_flags;
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extern u32 dump_prefix_page;
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struct dump_save_areas {
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struct save_area_ext **areas;
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int count;
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};
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extern struct dump_save_areas dump_save_areas;
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extern void do_reipl(void);
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extern void do_halt(void);
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extern void do_poff(void);
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extern void ipl_save_parameters(void);
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extern void ipl_update_parameters(void);
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extern size_t append_ipl_vmparm(char *, size_t);
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extern size_t append_ipl_scpdata(char *, size_t);
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enum {
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IPL_DEVNO_VALID = 1,
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IPL_PARMBLOCK_VALID = 2,
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IPL_NSS_VALID = 4,
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};
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enum ipl_type {
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IPL_TYPE_UNKNOWN = 1,
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IPL_TYPE_CCW = 2,
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IPL_TYPE_FCP = 4,
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IPL_TYPE_FCP_DUMP = 8,
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IPL_TYPE_NSS = 16,
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};
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struct ipl_info
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{
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enum ipl_type type;
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union {
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struct {
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struct ccw_dev_id dev_id;
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} ccw;
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struct {
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struct ccw_dev_id dev_id;
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u64 wwpn;
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u64 lun;
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} fcp;
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struct {
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char name[NSS_NAME_SIZE + 1];
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} nss;
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} data;
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};
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extern struct ipl_info ipl_info;
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extern void setup_ipl(void);
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/*
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* DIAG 308 support
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*/
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enum diag308_subcode {
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DIAG308_REL_HSA = 2,
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DIAG308_IPL = 3,
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DIAG308_DUMP = 4,
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DIAG308_SET = 5,
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DIAG308_STORE = 6,
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};
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enum diag308_ipl_type {
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DIAG308_IPL_TYPE_FCP = 0,
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DIAG308_IPL_TYPE_CCW = 2,
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};
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enum diag308_opt {
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DIAG308_IPL_OPT_IPL = 0x10,
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DIAG308_IPL_OPT_DUMP = 0x20,
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};
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enum diag308_flags {
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DIAG308_FLAGS_LP_VALID = 0x80,
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};
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enum diag308_vm_flags {
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DIAG308_VM_FLAGS_NSS_VALID = 0x80,
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DIAG308_VM_FLAGS_VP_VALID = 0x40,
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};
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enum diag308_rc {
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DIAG308_RC_OK = 0x0001,
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DIAG308_RC_NOCONFIG = 0x0102,
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};
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extern int diag308(unsigned long subcode, void *addr);
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extern void diag308_reset(void);
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extern void store_status(void);
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extern void lgr_info_log(void);
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#endif /* _ASM_S390_IPL_H */
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