2 files changed, 74 insertions, 39 deletions
diff --git a/man/man2/prctl.2 b/man/man2/prctl.2
index 290a92e40d..b36275d427 100644
--- a/man/man2/prctl.2
+++ b/man/man2/prctl.2
@@ -129,38 +129,8 @@ The first argument can be:
 .B PR_SET_SPECULATION_CTRL
 .TQ
 .B PR_SVE_SET_VL
-.\" prctl PR_SVE_GET_VL
-.TP
-.BR PR_SVE_GET_VL " (since Linux 4.15, only on arm64)"
-Get the thread's current SVE vector length configuration.
-.IP
-Arguments
-.IR arg2 ", " arg3 ", " arg4 ", and " arg5
-are ignored.
-.IP
-Provided that the kernel and platform support SVE,
-this operation always succeeds,
-returning a nonnegative value that describes the
-.I current
-configuration.
-The bits corresponding to
-.B PR_SVE_VL_LEN_MASK
-contain the currently configured vector length in bytes.
-The bit corresponding to
-.B PR_SVE_VL_INHERIT
-indicates whether the vector length will be inherited
-across
-.BR execve (2).
-.IP
-Note that there is no way to determine whether there is
-a pending vector length change that has not yet taken effect.
-.IP
-For more information, see the kernel source file
-.I Documentation/arm64/sve.rst
-.\"commit b693d0b372afb39432e1c49ad7b3454855bc6bed
-(or
-.I Documentation/arm64/sve.txt
-before Linux 5.3).
+.TQ
+.B PR_SVE_GET_VL
 .TP
 .\" prctl PR_SET_SYSCALL_USER_DISPATCH
 .\" commit 1446e1df9eb183fdf81c3f0715402f1d7595d4
@@ -700,7 +670,6 @@ of the calling process.
 for information on the protection mask bits.)
 .SH RETURN VALUE
 On success,
-.BR PR_SVE_GET_VL ,
 .BR PR_GET_TAGGED_ADDR_CTRL ,
 .BR PR_GET_THP_DISABLE ,
 .BR PR_GET_TIMING ,
@@ -753,12 +722,6 @@ is not
 .B EINVAL
 .I op
 is
-.B PR_SVE_GET_VL
-and SVE is not available on this platform.
-.TP
-.B EINVAL
-.I op
-is
 .B PR_SET_SYSCALL_USER_DISPATCH
 and one of the following is true:
 .RS
@@ -854,4 +817,5 @@ glibc 2.0.6
 .BR PR_SET_SPECULATION_CTRL (2const),
 .BR PR_GET_SPECULATION_CTRL (2const),
 .BR PR_SVE_SET_VL (2const),
+.BR PR_SVE_GET_VL (2const),
 .BR core (5)
diff --git a/man/man2const/PR_SVE_GET_VL.2const b/man/man2const/PR_SVE_GET_VL.2const
new file mode 100644
index 0000000000..20d06237ad
--- /dev/null
+++ b/man/man2const/PR_SVE_GET_VL.2const
@@ -0,0 +1,71 @@
+.\" Copyright 2020, Dave Martin <Dave.Martin@arm.com>
+.\" Copyright 2020, Michael Kerrisk <mtk.manpages@gmail.com>
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.TH PR_SVE_GET_VL 2const (date) "Linux man-pages (unreleased)"
+.SH NAME
+PR_SVE_GET_VL
+\-
+get the thread's SVE vector length
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <sys/prctl.h>
+.P
+.BI "int prctl(int " op ", ...);"
+.fi
+.SH DESCRIPTION
+.TP
+.BR PR_SVE_GET_VL " (since Linux 4.15, only on arm64)"
+Get the thread's current SVE vector length configuration.
+.IP
+Arguments
+.IR arg2 ", " arg3 ", " arg4 ", and " arg5
+are ignored.
+.IP
+Provided that the kernel and platform support SVE,
+this operation always succeeds,
+returning a nonnegative value that describes the
+.I current
+configuration.
+The bits corresponding to
+.B PR_SVE_VL_LEN_MASK
+contain the currently configured vector length in bytes.
+The bit corresponding to
+.B PR_SVE_VL_INHERIT
+indicates whether the vector length will be inherited
+across
+.BR execve (2).
+.IP
+Note that there is no way to determine whether there is
+a pending vector length change that has not yet taken effect.
+.IP
+For more information, see the kernel source file
+.I Documentation/arm64/sve.rst
+.\"commit b693d0b372afb39432e1c49ad7b3454855bc6bed
+(or
+.I Documentation/arm64/sve.txt
+before Linux 5.3).
+.SH RETURN VALUE
+On success,
+.BR PR_SVE_GET_VL ,
+return the nonnegative values described above.
+On error, \-1 is returned, and
+.I errno
+is set to indicate the error.
+.SH ERRORS
+.TP
+.B EINVAL
+.I op
+is
+.B PR_SVE_GET_VL
+and SVE is not available on this platform.
+.SH STANDARDS
+Linux.
+.SH HISTORY
+.SH SEE ALSO
+.BR prctl (2),
+.BR PR_SVE_SET_VL (2const)