blob: 9f937b125ab076ac0bcc2cd95b3250d918e7ae0e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2020 Arm Limited
*/
#define pr_fmt(fmt) "smccc: " fmt
#include <linux/cache.h>
#include <linux/init.h>
#include <linux/arm-smccc.h>
#include <linux/kernel.h>
#include <asm/archrandom.h>
static u32 smccc_version = ARM_SMCCC_VERSION_1_0;
static enum arm_smccc_conduit smccc_conduit = SMCCC_CONDUIT_NONE;
bool __ro_after_init smccc_trng_available = false;
u64 __ro_after_init smccc_has_sve_hint = false;
void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit)
{
smccc_version = version;
smccc_conduit = conduit;
smccc_trng_available = smccc_probe_trng();
if (IS_ENABLED(CONFIG_ARM64_SVE) &&
smccc_version >= ARM_SMCCC_VERSION_1_3)
smccc_has_sve_hint = true;
}
enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void)
{
if (smccc_version < ARM_SMCCC_VERSION_1_1)
return SMCCC_CONDUIT_NONE;
return smccc_conduit;
}
EXPORT_SYMBOL_GPL(arm_smccc_1_1_get_conduit);
u32 arm_smccc_get_version(void)
{
return smccc_version;
}
EXPORT_SYMBOL_GPL(arm_smccc_get_version);
|
