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10ad34bc76
The multi-threading facility is introduced with the z13 processor family. This patch adds code to detect the multi-threading facility. With the facility enabled each core will surface multiple hardware threads to the system. Each hardware threads looks like a normal CPU to the operating system with all its registers and properties. The SCLP interface reports the SMT topology indirectly via the maximum thread id. Each reported CPU in the result of a read-scp-information is a core representing a number of hardware threads. To reflect the reduced CPU capacity if two hardware threads run on a single core the MT utilization counter set is used to normalize the raw cputime obtained by the CPU timer deltas. This scaled cputime is reported via the taskstats interface. The normal /proc/stat numbers are based on the raw cputime and are not affected by the normalization. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Copyright IBM Corp. 2007
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#ifndef _ASM_S390_SCLP_H
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#define _ASM_S390_SCLP_H
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#include <linux/types.h>
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#include <asm/chpid.h>
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#include <asm/cpu.h>
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#define SCLP_CHP_INFO_MASK_SIZE 32
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struct sclp_chp_info {
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u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
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u8 standby[SCLP_CHP_INFO_MASK_SIZE];
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u8 configured[SCLP_CHP_INFO_MASK_SIZE];
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};
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#define LOADPARM_LEN 8
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struct sclp_ipl_info {
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int is_valid;
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int has_dump;
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char loadparm[LOADPARM_LEN];
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};
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struct sclp_cpu_entry {
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u8 core_id;
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u8 reserved0[2];
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u8 : 3;
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u8 siif : 1;
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u8 : 4;
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u8 reserved2[10];
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u8 type;
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u8 reserved1;
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} __attribute__((packed));
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struct sclp_cpu_info {
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unsigned int configured;
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unsigned int standby;
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unsigned int combined;
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int has_cpu_type;
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struct sclp_cpu_entry cpu[MAX_CPU_ADDRESS + 1];
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};
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int sclp_get_cpu_info(struct sclp_cpu_info *info);
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int sclp_cpu_configure(u8 cpu);
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int sclp_cpu_deconfigure(u8 cpu);
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unsigned long long sclp_get_rnmax(void);
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unsigned long long sclp_get_rzm(void);
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unsigned int sclp_get_max_cpu(void);
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unsigned int sclp_get_mtid(u8 cpu_type);
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unsigned int sclp_get_mtid_max(void);
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unsigned int sclp_get_mtid_prev(void);
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int sclp_sdias_blk_count(void);
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int sclp_sdias_copy(void *dest, int blk_num, int nr_blks);
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int sclp_chp_configure(struct chp_id chpid);
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int sclp_chp_deconfigure(struct chp_id chpid);
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int sclp_chp_read_info(struct sclp_chp_info *info);
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void sclp_get_ipl_info(struct sclp_ipl_info *info);
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bool __init sclp_has_linemode(void);
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bool __init sclp_has_vt220(void);
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bool sclp_has_sprp(void);
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int sclp_pci_configure(u32 fid);
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int sclp_pci_deconfigure(u32 fid);
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int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode);
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unsigned long sclp_get_hsa_size(void);
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void sclp_early_detect(void);
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int sclp_has_siif(void);
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unsigned int sclp_get_ibc(void);
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long _sclp_print_early(const char *);
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#endif /* _ASM_S390_SCLP_H */
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