feat(psci): advertise PSCI 1.1 instead of 0.2

To enable vendor-specific SMCs that rely on SMCCC v1.1 semantics, the
emulated PSCI version is updated from 0.2 to 1.1. The PSCI FEATURES
handler is extended to advertise only the required PSCI 1.1
capability, PSCI_1_1_RESET_TYPE_VENDOR_START.

This is required by platforms such as NXP S32G399A, where Linux will not
issue certain vendor SMCs unless PSCI 1.1 is reported.

Signed-off-by: João Peixoto <joaopeixotooficial@gmail.com>

Author: joaopeixoto13

src/arch/armv8/inc/arch/psci.h

@@ -22,6 +22,8 @@
 #define PSCI_FEATURES            (0x8400000A)
 #define PSCI_MIG_INFO_TYPE       (0x84000006)
 
+#define PSCI_1_1_RESET_TYPE_VENDOR_START    (0x80000000)
+
 #ifdef AARCH32
 #define PSCI_CPU_SUSPEND   PSCI_CPU_SUSPEND_SMC32
 #define PSCI_CPU_ON        PSCI_CPU_ON_SMC32
@@ -40,6 +42,7 @@
 #define PSCI_INVALID_ADDRESS           (-1L)
 
 #define PSCI_VERSION_0_2               (2U)
+#define PSCI_VERSION_1_1               (0x10001)
 #define PSCI_GET_VERSION_MAJOR(ver)    (u16)((ver) >> 16)
 #define PSCI_GET_VERSION(major, minor) (((major) << 16) | (minor))
 

src/arch/armv8/psci.c

@@ -170,6 +170,7 @@ static int32_t psci_features_handler(uint32_t feature_id)
         case PSCI_AFFINITY_INFO_SMC32:
         case PSCI_AFFINITY_INFO_SMC64:
         case PSCI_FEATURES:
+        case PSCI_1_1_RESET_TYPE_VENDOR_START:
             ret = PSCI_E_SUCCESS;
             break;
         default:
@@ -186,7 +187,7 @@ int32_t psci_smc_handler(uint32_t smc_fid, unsigned long x1, unsigned long x2, u
 
     switch (smc_fid) {
         case PSCI_VERSION:
-            ret = PSCI_VERSION_0_2;
+            ret = PSCI_VERSION_1_1;
             break;
 
         case PSCI_CPU_OFF: