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smccc: fix sign bit expansion

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Signed ARM_SMCCC_FAST_CALL value is shifted to 31'st bit. Then, it is expanded
to 64 bit value, which results in 1s in higher 32 bits.

This causes corrupted values in 64-bit SMC IDs and issues in buggy handlers of
32-bit calls.

We need to make ARM_SMCCC_FAST_CALL unsigned long, so it would work properly
on 32 bit architectures.

Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
This commit is contained in:
Volodymyr Babchuk 2021-01-05 20:03:11 +00:00 committed by Tom Rini
parent 4d145f26dd
commit b7cfe32e18
1 changed files with 2 additions and 2 deletions
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4
include/linux/arm-smccc.h
View file

@ -11,8 +11,8 @@
* http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
*/
#define ARM_SMCCC_STD_CALL 0
#define ARM_SMCCC_FAST_CALL 1
#define ARM_SMCCC_STD_CALL 0UL
#define ARM_SMCCC_FAST_CALL 1UL
#define ARM_SMCCC_TYPE_SHIFT 31
#define ARM_SMCCC_SMC_32 0