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firmware: psci: Fix bind_smccc_features psci check

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According to PSCI specification DEN0022F, PSCI_FEATURES is used to check
whether the SMCCC is implemented by discovering SMCCC_VERSION.

Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
This commit is contained in:
Weizhao Ouyang 2024-03-04 14:42:40 +00:00 • committed by Tom Rini
parent 0cff87c90c
commit 12ccdcd79b
2 changed files with 10 additions and 1 deletions
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5
drivers/firmware/psci.c
View file

@ -135,10 +135,13 @@ static int bind_smccc_features(struct udevice *dev, int psci_method)
PSCI_VERSION_MAJOR(psci_0_2_get_version()) == 0)
return 0;
if (request_psci_features(ARM_SMCCC_ARCH_FEATURES) ==
if (request_psci_features(ARM_SMCCC_VERSION) ==
PSCI_RET_NOT_SUPPORTED)
return 0;
if (invoke_psci_fn(ARM_SMCCC_VERSION, 0, 0, 0) < ARM_SMCCC_VERSION_1_1)
return 0;
if (psci_method == PSCI_METHOD_HVC)
pdata->invoke_fn = smccc_invoke_hvc;
else

6
include/linux/arm-smccc.h
View file

@ -55,8 +55,14 @@
#define ARM_SMCCC_QUIRK_NONE 0
#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
#define ARM_SMCCC_VERSION 0x80000000
#define ARM_SMCCC_ARCH_FEATURES 0x80000001
#define ARM_SMCCC_VERSION_1_0 0x10000
#define ARM_SMCCC_VERSION_1_1 0x10001
#define ARM_SMCCC_VERSION_1_2 0x10002
#define ARM_SMCCC_VERSION_1_3 0x10003
#define ARM_SMCCC_RET_NOT_SUPPORTED ((unsigned long)-1)
#ifndef __ASSEMBLY__