mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-23 03:29:43 +00:00
5937835ac4
Move the constants from hw/core/qdev-properties.c to util/block-helpers.h so that knowledge of the min/max values is Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Coiby Xu <coiby.xu@gmail.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Acked-by: Eduardo Habkost <ehabkost@redhat.com> Message-id: 20200918080912.321299-5-coiby.xu@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
|
|
* Block utility functions
|
|
*
|
|
* Copyright IBM, Corp. 2011
|
|
* Copyright (c) 2020 Coiby Xu <coiby.xu@gmail.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "block-helpers.h"
|
|
|
|
/**
|
|
* check_block_size:
|
|
* @id: The unique ID of the object
|
|
* @name: The name of the property being validated
|
|
* @value: The block size in bytes
|
|
* @errp: A pointer to an area to store an error
|
|
*
|
|
* This function checks that the block size meets the following conditions:
|
|
* 1. At least MIN_BLOCK_SIZE
|
|
* 2. No larger than MAX_BLOCK_SIZE
|
|
* 3. A power of 2
|
|
*/
|
|
void check_block_size(const char *id, const char *name, int64_t value,
|
|
Error **errp)
|
|
{
|
|
/* value of 0 means "unset" */
|
|
if (value && (value < MIN_BLOCK_SIZE || value > MAX_BLOCK_SIZE)) {
|
|
error_setg(errp, QERR_PROPERTY_VALUE_OUT_OF_RANGE,
|
|
id, name, value, MIN_BLOCK_SIZE, MAX_BLOCK_SIZE);
|
|
return;
|
|
}
|
|
|
|
/* We rely on power-of-2 blocksizes for bitmasks */
|
|
if ((value & (value - 1)) != 0) {
|
|
error_setg(errp,
|
|
"Property %s.%s doesn't take value '%" PRId64
|
|
"', it's not a power of 2",
|
|
id, name, value);
|
|
return;
|
|
}
|
|
}
|