drivers: firmware: psci: add INVALID_ADDRESS return value

PSCI 1.0 introduces the INVALID_ADDRESS return value for functions
that take an address as input parameter (eg CPU_SUSPEND).

This patch adds INVALID_ADDRESS return value to kernel code and
updates the PSCI to linux error conversion to take it into account.

The kernel error value associated to INVALID_ADDRESS is set to
the error returned when the PSCI error code is INVALID_PARAMETERS
to comply with current call sites expected return value, given
that the kernel at present has no use for the additional error
information reported.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Jisheng Zhang <jszhang@marvell.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index 42700f09a8c5..0821e332c85a 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -78,6 +78,7 @@ static int psci_to_linux_errno(int errno)
         case PSCI_RET_NOT_SUPPORTED:
                 return -EOPNOTSUPP;
         case PSCI_RET_INVALID_PARAMS:
+        case PSCI_RET_INVALID_ADDRESS:
                 return -EINVAL;
         case PSCI_RET_DENIED:
                 return -EPERM;
diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h
index 310d83e0a91b..64469e64688f 100644
--- a/include/uapi/linux/psci.h
+++ b/include/uapi/linux/psci.h
@@ -86,5 +86,6 @@
 #define PSCI_RET_INTERNAL_FAILURE               -6
 #define PSCI_RET_NOT_PRESENT                    -7
 #define PSCI_RET_DISABLED                       -8
+#define PSCI_RET_INVALID_ADDRESS                -9
 
 #endif /* _UAPI_LINUX_PSCI_H */