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smccc: define generic IDs for feature discovery

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Defines function IDs ARM_SMCCC_ARCH_FEATURES used to query SMCCC feature
support, applicable from Arm SMCCC v1.1 specification.

Defines macro ARM_SMCCC_RET_NOT_SUPPORTED as generic return identifier
for when a SMCCC feature is not supported.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
This commit is contained in:
Etienne Carriere
2022-06-01 10:27:31 +02:00
committed by Tom Rini
parent c08decd29e
commit f7f1240015
1 changed files with 4 additions and 0 deletions
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4
include/linux/arm-smccc.h
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@@ -51,6 +51,10 @@
#define ARM_SMCCC_QUIRK_NONE 0
#define ARM_SMCCC_QUIRK_QCOM_A6 1 /* Save/restore register a6 */
#define ARM_SMCCC_ARCH_FEATURES 0x80000001
#define ARM_SMCCC_RET_NOT_SUPPORTED ((unsigned long)-1)
#ifndef __ASSEMBLY__
#include <linux/linkage.h>