Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\kernel\cpu\resctrl\ctrlmondata.c Create Date:2022-07-28 08:12:49
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Name:Check whether MBA bandwidth percentage value is correct. The value is* checked against the minimum and max bandwidth values specified by the* hardware. The allocated bandwidth percentage is rounded to the next* control step available on the hardware.

Proto:static bool bw_validate(char *buf, unsigned long *data, struct rdt_resource *r)

Type:bool

Parameter:

TypeParameterName
char *buf
unsigned long *data
struct rdt_resource *r
85  If Not delay_linear Then
86  rdt_last_cmd_puts("No support for non-linear MB domains\n")
87  Return false
90  ret = kstrtoul - convert a string to an unsigned long*@s: The start of the string. The string must be null-terminated, and may also* include a single newline before its terminating null. The first character* may also be a plus sign, but not a minus sign.
91  If ret Then
92  rdt_last_cmd_printf("Non-decimal digit in MB value %s\n", buf)
93  Return false
96  If ( bw < min_bw || bw > default_ctrl ) && Not is_mba_sc(r) Then
98  rdt_last_cmd_printf("MB value %ld out of range [%d,%d]\n", bw, min_bw, default_ctrl)
100  Return false
103  data = undup - round up to the next specified multiple*@x: the value to up*@y: multiple to round up to* Rounds @x up to next multiple of @y. If @y will always be a power* of 2, consider using the faster round_up().(bw, (unsignedlong)bw_gran)
104  Return true
Caller
NameDescribe
parse_bw_intel