path: root/arch/s390/include/uapi/asm/unistd.h
diff options
authorQingFeng Hao <haoqf@linux.vnet.ibm.com>2017-09-29 12:41:52 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-10-09 11:15:36 +0200
commit3d8757b87d7fc15a87928bc970f060bc9c6dc618 (patch)
treed431083fe178687964c23eee52011b8a88636054 /arch/s390/include/uapi/asm/unistd.h
parent9fb6c9b3fea1b1d1c6f14178373e8f7235f3b681 (diff)
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/unistd.h')
1 files changed, 2 insertions, 1 deletions
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

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