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s390_sthyi.2: Minor fixes 

Reported-by: Stefan Raspl <raspl@linux.vnet.ibm.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2017-12-11 19:05:18 +01:00
parent ef741e2a72
commit 5057157b07
1 changed files with 19 additions and 8 deletions
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27
man2/s390_sthyi.2
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@ -44,23 +44,34 @@ The
.I function_code
argument indicates which function to perform.
The following code(s) are supported:
.RB ( 0 )
.TP
0
Return CP (Central Processor) and IFL (Integrated Facility for Linux)
capacity information.
.PP
The
.I buffer
argument specifies the address of response buffer. If the system
argument specifies the address of a response buffer. If the system
call returns 0, the response buffer will be filled with CPU capacity
information. Otherwise, the response buffer's content is unchanged.
.PP
The
.I return_code
argument stores the return code of the STHYI instruction, success
.RB ( 0 )
or unsupported function code
.RB ( 4 ).
For details about return code, function_code, and buffer argument,
+argument stores the return code of the STHYI instruction, using one
of the
following values:
.TP 8
.B 0
Success.
.TP
.B 4
Unsupported function code.
.PP
For further details about
.IR return_code ,
.IR function_code ,
and
.IR buffer ,
please see section
.IR "CONFORMING TO"
below.
@ -75,7 +86,7 @@ On success, the return value of
matches the condition code of the STHYI instructions, which is a value
between 0-3 (that is: emulation succeeded).
Return value of 0 indicates that CPU capacity information is stored to
.I buffer.
.IR buffer .
Return value of 3 indicates "unsupported function code" and buffer's
content is unchanged.
Return value of 1 and 2 are reserved.