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| author |   QingFeng Hao <haoqf@linux.vnet.ibm.com> | 2017-09-29 12:41:52 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-10-09 11:15:36 +0200 |
| commit | 3d8757b87d7fc15a87928bc970f060bc9c6dc618 (patch) | |
| tree | d431083fe178687964c23eee52011b8a88636054 /arch/s390/include/uapi/asm | |
| parent | s390/sthyi: add cache to store hypervisor info (diff) | |
| download | linux-dev-3d8757b87d7fc15a87928bc970f060bc9c6dc618.tar.xz linux-dev-3d8757b87d7fc15a87928bc970f060bc9c6dc618.zip | |
s390/sthyi: add s390_sthyi system call
Add a syscall of s390_sthyi to implement STHYI instruction in LPAR
which reuses the implementation for KVM by Janosch Frank -
commit 95ca2cb57985 ("KVM: s390: Add sthyi emulation").
STHYI(Store Hypervisor Information) is an emulated z/VM instruction that
provides a guest with basic information about the layers it is running
on. This includes information about the cpu configuration of both the
machine and the lpar, as well as their names, machine model and
machine type. This information enables an application to determine the
maximum capacity of CPs and IFLs available to software.
For the arguments of s390_sthyi, code shall be 0 and flags is reserved for
future use, info is the output argument to store the required hypervisor
info.
Signed-off-by: QingFeng Hao <haoqf@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/uapi/asm')
| -rw-r--r-- | arch/s390/include/uapi/asm/sthyi.h | 6 | ||||
| -rw-r--r-- | arch/s390/include/uapi/asm/unistd.h | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/arch/s390/include/uapi/asm/sthyi.h b/arch/s390/include/uapi/asm/sthyi.h new file mode 100644 index 000000000000..ec113db4eb7e --- /dev/null +++ b/arch/s390/include/uapi/asm/sthyi.h @@ -0,0 +1,6 @@ +#ifndef _UAPI_ASM_STHYI_H +#define _UAPI_ASM_STHYI_H + +#define STHYI_FC_CP_IFL_CAP 0 + +#endif /* _UAPI_ASM_STHYI_H */ diff --git a/arch/s390/include/uapi/asm/unistd.h b/arch/s390/include/uapi/asm/unistd.h index ea42290e7d51..61c64f543769 100644 --- a/arch/s390/include/uapi/asm/unistd.h +++ b/arch/s390/include/uapi/asm/unistd.h @@ -315,7 +315,8 @@ #define __NR_pwritev2 377 #define __NR_s390_guarded_storage 378 #define __NR_statx 379 -#define NR_syscalls 380 +#define __NR_s390_sthyi 380 +#define NR_syscalls 381 /* * There are some system calls that are not present on 64 bit, some |