1526bf9ccf
Currently qemu/kvm on s390 uses a guest mapping that does not allow the guest backing page table to be write-protected to support older systems. On those older systems a host write protection fault will be delivered to the guest. Newer systems allow to write-protect the guest backing memory and let the fault be delivered to the host, thus allowing COW. Use a capability bit to tell qemu if that is possible. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
60 lines
1.3 KiB
C
60 lines
1.3 KiB
C
/*
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* include/asm-s390/sclp.h
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*
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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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#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 address;
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u8 reserved0[13];
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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[255];
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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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void sclp_facilities_detect(void);
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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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u8 sclp_get_fac85(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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#endif /* _ASM_S390_SCLP_H */
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