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s390/sclp: introduce sclp_early_get_hsa_size
Introduce sclp_early_get_hsa_size function to be used during early memory detection. This function allows to find a memory limit imposed during zfcpdump. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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2 changed files with 12 additions and 0 deletions
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@ -115,6 +115,7 @@ void sclp_early_printk_force(const char *s);
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void __sclp_early_printk(const char *s, unsigned int len, unsigned int force);
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int sclp_early_get_memsize(unsigned long *mem);
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int sclp_early_get_hsa_size(unsigned long *hsa_size);
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int _sclp_get_core_info(struct sclp_core_info *info);
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int sclp_core_configure(u8 core);
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int sclp_core_deconfigure(u8 core);
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@ -288,6 +288,17 @@ int __init sclp_early_get_memsize(unsigned long *mem)
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return 0;
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}
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int __init sclp_early_get_hsa_size(unsigned long *hsa_size)
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{
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if (!sclp_info_sccb_valid)
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return -EIO;
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*hsa_size = 0;
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if (sclp_info_sccb.hsa_size)
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*hsa_size = (sclp_info_sccb.hsa_size - 1) * PAGE_SIZE;
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return 0;
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}
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#define SCLP_STORAGE_INFO_FACILITY 0x0000400000000000UL
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void __weak __init add_mem_detect_block(u64 start, u64 end) {}
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