arm/arm64: smccc/psci: add arm_smccc_1_1_get_conduit()
SMCCC callers are currently amassing a collection of enums for the SMCCC conduit, and are having to dig into the PSCI driver's internals in order to figure out what to do. Let's clean this up, with common SMCCC_CONDUIT_* definitions, and an arm_smccc_1_1_get_conduit() helper that abstracts the PSCI driver's internal state. We can kill off the PSCI_CONDUIT_* definitions once we've migrated users over to the new interface. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
parent
4f5cafb5cb
commit
6b7fe77c33
|
@ -57,6 +57,21 @@ struct psci_operations psci_ops = {
|
|||
.smccc_version = SMCCC_VERSION_1_0,
|
||||
};
|
||||
|
||||
enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void)
|
||||
{
|
||||
if (psci_ops.smccc_version < SMCCC_VERSION_1_1)
|
||||
return SMCCC_CONDUIT_NONE;
|
||||
|
||||
switch (psci_ops.conduit) {
|
||||
case PSCI_CONDUIT_SMC:
|
||||
return SMCCC_CONDUIT_SMC;
|
||||
case PSCI_CONDUIT_HVC:
|
||||
return SMCCC_CONDUIT_HVC;
|
||||
default:
|
||||
return SMCCC_CONDUIT_NONE;
|
||||
}
|
||||
}
|
||||
|
||||
typedef unsigned long (psci_fn)(unsigned long, unsigned long,
|
||||
unsigned long, unsigned long);
|
||||
static psci_fn *invoke_psci_fn;
|
||||
|
|
|
@ -80,6 +80,22 @@
|
|||
|
||||
#include <linux/linkage.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
enum arm_smccc_conduit {
|
||||
SMCCC_CONDUIT_NONE,
|
||||
SMCCC_CONDUIT_SMC,
|
||||
SMCCC_CONDUIT_HVC,
|
||||
};
|
||||
|
||||
/**
|
||||
* arm_smccc_1_1_get_conduit()
|
||||
*
|
||||
* Returns the conduit to be used for SMCCCv1.1 or later.
|
||||
*
|
||||
* When SMCCCv1.1 is not present, returns SMCCC_CONDUIT_NONE.
|
||||
*/
|
||||
enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void);
|
||||
|
||||
/**
|
||||
* struct arm_smccc_res - Result from SMC/HVC call
|
||||
* @a0-a3 result values from registers 0 to 3
|
||||
|
|
Loading…
Reference in a new issue