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arm: kernel: Add SMC structure parameter

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This patch adds a quirk parameter to the arm_smccc_(smc/hvc) calls.
The quirk structure allows for specialized SMC operations due to SoC
specific requirements.  The current arm_smccc_(smc/hvc) is renamed and
macros are used instead to specify the standard arm_smccc_(smc/hvc) or
the arm_smccc_(smc/hvc)_quirk function.

This patch and partial implementation was suggested by Will Deacon.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Andy Gross
2017-02-01 11:28:27 -06:00
committed by Will Deacon
parent 757b435aaa
commit 680a0873e1
6 changed files with 57 additions and 26 deletions
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14
arch/arm64/kernel/smccc-call.S
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@@ -27,17 +27,19 @@
/*
* void arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
* unsigned long a3, unsigned long a4, unsigned long a5,
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
* struct arm_smccc_quirk *quirk)
*/
ENTRY(arm_smccc_smc)
ENTRY(__arm_smccc_smc)
SMCCC smc
ENDPROC(arm_smccc_smc)
ENDPROC(__arm_smccc_smc)
/*
* void arm_smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
* unsigned long a3, unsigned long a4, unsigned long a5,
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
* unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
* struct arm_smccc_quirk *quirk)
*/
ENTRY(arm_smccc_hvc)
ENTRY(__arm_smccc_hvc)
SMCCC hvc
ENDPROC(arm_smccc_hvc)
ENDPROC(__arm_smccc_hvc)