Contributors: 13
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Sudeep Holla |
105 |
28.23% |
5 |
23.81% |
| Andre Przywara |
79 |
21.24% |
2 |
9.52% |
| Shanker Donthineni |
70 |
18.82% |
1 |
4.76% |
| Roman Kisel |
58 |
15.59% |
1 |
4.76% |
| Will Deacon |
18 |
4.84% |
2 |
9.52% |
| Mark Rutland |
17 |
4.57% |
2 |
9.52% |
| Marc Zyngier |
8 |
2.15% |
2 |
9.52% |
| Martin Botka |
5 |
1.34% |
1 |
4.76% |
| Catalin Marinas |
5 |
1.34% |
1 |
4.76% |
| Robin Murphy |
3 |
0.81% |
1 |
4.76% |
| Mark Brown |
2 |
0.54% |
1 |
4.76% |
| Thomas Gleixner |
1 |
0.27% |
1 |
4.76% |
| Michael Kelley |
1 |
0.27% |
1 |
4.76% |
| Total |
372 |
|
21 |
|
// 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 <linux/platform_device.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;
s32 __ro_after_init smccc_soc_id_version = SMCCC_RET_NOT_SUPPORTED;
s32 __ro_after_init smccc_soc_id_revision = SMCCC_RET_NOT_SUPPORTED;
void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit)
{
struct arm_smccc_res res;
smccc_version = version;
smccc_conduit = conduit;
smccc_trng_available = smccc_probe_trng();
if ((smccc_version >= ARM_SMCCC_VERSION_1_2) &&
(smccc_conduit != SMCCC_CONDUIT_NONE)) {
arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
ARM_SMCCC_ARCH_SOC_ID, &res);
if ((s32)res.a0 >= 0) {
arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 0, &res);
smccc_soc_id_version = (s32)res.a0;
arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_SOC_ID, 1, &res);
smccc_soc_id_revision = (s32)res.a0;
}
}
}
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);
s32 arm_smccc_get_soc_id_version(void)
{
return smccc_soc_id_version;
}
s32 arm_smccc_get_soc_id_revision(void)
{
return smccc_soc_id_revision;
}
EXPORT_SYMBOL_GPL(arm_smccc_get_soc_id_revision);
bool arm_smccc_hypervisor_has_uuid(const uuid_t *hyp_uuid)
{
struct arm_smccc_res res = {};
uuid_t uuid;
if (arm_smccc_1_1_get_conduit() != SMCCC_CONDUIT_HVC)
return false;
arm_smccc_1_1_hvc(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res);
if (res.a0 == SMCCC_RET_NOT_SUPPORTED)
return false;
uuid = smccc_res_to_uuid(res.a0, res.a1, res.a2, res.a3);
return uuid_equal(&uuid, hyp_uuid);
}
EXPORT_SYMBOL_GPL(arm_smccc_hypervisor_has_uuid);
static int __init smccc_devices_init(void)
{
struct platform_device *pdev;
if (smccc_trng_available) {
pdev = platform_device_register_simple("smccc_trng", -1,
NULL, 0);
if (IS_ERR(pdev))
pr_err("smccc_trng: could not register device: %ld\n",
PTR_ERR(pdev));
}
return 0;
}
device_initcall(smccc_devices_init);