[PATCH v2 01/15] xen/arm: psci: Rework the PSCI definitions

[Julien Grall <julien.grall@arm.com>]

Some PSCI functions are only available in the 32-bit version. After
recent changes, Xen always needs to know whether the call was made using
32-bit id or 64-bit id. So we don't emulate reserved one.

With the current naming scheme, it is not easy to know which call
supports 32-bit and 64-bit id. So rework the definitions to encode the
version in the name. From now the functions will be named PSCI_0_2_FNxx
where xx is 32 or 64.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Volodymyr Babchuk <volodymyr.babchuk@epam.com>

---
    Changes in v2:
        - Add Volodymyr's reviewed-by
---
 xen/arch/arm/platforms/seattle.c |  4 ++--
 xen/arch/arm/psci.c              | 10 +++++-----
 xen/arch/arm/vpsci.c             | 22 +++++++++++-----------
 xen/include/asm-arm/psci.h       | 37 +++++++++++++++++++++----------------
 4 files changed, 39 insertions(+), 34 deletions(-)

diff --git a/xen/arch/arm/platforms/seattle.c b/xen/arch/arm/platforms/seattle.c
index 22c062293f..893cc17972 100644
--- a/xen/arch/arm/platforms/seattle.c
+++ b/xen/arch/arm/platforms/seattle.c
@@ -33,12 +33,12 @@ static const char * const seattle_dt_compat[] __initconst =
  */
 static void seattle_system_reset(void)
 {
-    call_smc(PSCI_0_2_FN32(SYSTEM_RESET), 0, 0, 0);
+    call_smc(PSCI_0_2_FN32_SYSTEM_RESET, 0, 0, 0);
 }
 
 static void seattle_system_off(void)
 {
-    call_smc(PSCI_0_2_FN32(SYSTEM_OFF), 0, 0, 0);
+    call_smc(PSCI_0_2_FN32_SYSTEM_OFF, 0, 0, 0);
 }
 
 PLATFORM_START(seattle, "SEATTLE")
diff --git a/xen/arch/arm/psci.c b/xen/arch/arm/psci.c
index 1508a3be3a..5dda35cd7c 100644
--- a/xen/arch/arm/psci.c
+++ b/xen/arch/arm/psci.c
@@ -31,9 +31,9 @@
  * (native-width) function ID.
  */
 #ifdef CONFIG_ARM_64
-#define PSCI_0_2_FN_NATIVE(name)    PSCI_0_2_FN64(name)
+#define PSCI_0_2_FN_NATIVE(name)    PSCI_0_2_FN64_##name
 #else
-#define PSCI_0_2_FN_NATIVE(name)    PSCI_0_2_FN32(name)
+#define PSCI_0_2_FN_NATIVE(name)    PSCI_0_2_FN32_##name
 #endif
 
 uint32_t psci_ver;
@@ -48,13 +48,13 @@ int call_psci_cpu_on(int cpu)
 void call_psci_system_off(void)
 {
     if ( psci_ver > PSCI_VERSION(0, 1) )
-        call_smc(PSCI_0_2_FN32(SYSTEM_OFF), 0, 0, 0);
+        call_smc(PSCI_0_2_FN32_SYSTEM_OFF, 0, 0, 0);
 }
 
 void call_psci_system_reset(void)
 {
     if ( psci_ver > PSCI_VERSION(0, 1) )
-        call_smc(PSCI_0_2_FN32(SYSTEM_RESET), 0, 0, 0);
+        call_smc(PSCI_0_2_FN32_SYSTEM_RESET, 0, 0, 0);
 }
 
 int __init psci_is_smc_method(const struct dt_device_node *psci)
@@ -144,7 +144,7 @@ int __init psci_init_0_2(void)
         }
     }
 
-    psci_ver = call_smc(PSCI_0_2_FN32(PSCI_VERSION), 0, 0, 0);
+    psci_ver = call_smc(PSCI_0_2_FN32_PSCI_VERSION, 0, 0, 0);
 
     /* For the moment, we only support PSCI 0.2 and PSCI 1.x */
     if ( psci_ver != PSCI_VERSION(0, 2) && PSCI_VERSION_MAJOR(psci_ver) != 1 )
diff --git a/xen/arch/arm/vpsci.c b/xen/arch/arm/vpsci.c
index 03fd4eb5b5..6ab8ab64d0 100644
--- a/xen/arch/arm/vpsci.c
+++ b/xen/arch/arm/vpsci.c
@@ -243,35 +243,35 @@ bool do_vpsci_0_2_call(struct cpu_user_regs *regs, uint32_t fid)
      */
     switch ( fid )
     {
-    case PSCI_0_2_FN32(PSCI_VERSION):
+    case PSCI_0_2_FN32_PSCI_VERSION:
         perfc_incr(vpsci_version);
         PSCI_SET_RESULT(regs, do_psci_0_2_version());
         return true;
 
-    case PSCI_0_2_FN32(CPU_OFF):
+    case PSCI_0_2_FN32_CPU_OFF:
         perfc_incr(vpsci_cpu_off);
         PSCI_SET_RESULT(regs, do_psci_0_2_cpu_off());
         return true;
 
-    case PSCI_0_2_FN32(MIGRATE_INFO_TYPE):
+    case PSCI_0_2_FN32_MIGRATE_INFO_TYPE:
         perfc_incr(vpsci_migrate_info_type);
         PSCI_SET_RESULT(regs, do_psci_0_2_migrate_info_type());
         return true;
 
-    case PSCI_0_2_FN32(SYSTEM_OFF):
+    case PSCI_0_2_FN32_SYSTEM_OFF:
         perfc_incr(vpsci_system_off);
         do_psci_0_2_system_off();
         PSCI_SET_RESULT(regs, PSCI_INTERNAL_FAILURE);
         return true;
 
-    case PSCI_0_2_FN32(SYSTEM_RESET):
+    case PSCI_0_2_FN32_SYSTEM_RESET:
         perfc_incr(vpsci_system_reset);
         do_psci_0_2_system_reset();
         PSCI_SET_RESULT(regs, PSCI_INTERNAL_FAILURE);
         return true;
 
-    case PSCI_0_2_FN32(CPU_ON):
-    case PSCI_0_2_FN64(CPU_ON):
+    case PSCI_0_2_FN32_CPU_ON:
+    case PSCI_0_2_FN64_CPU_ON:
     {
         register_t vcpuid = PSCI_ARG(regs, 1);
         register_t epoint = PSCI_ARG(regs, 2);
@@ -282,8 +282,8 @@ bool do_vpsci_0_2_call(struct cpu_user_regs *regs, uint32_t fid)
         return true;
     }
 
-    case PSCI_0_2_FN32(CPU_SUSPEND):
-    case PSCI_0_2_FN64(CPU_SUSPEND):
+    case PSCI_0_2_FN32_CPU_SUSPEND:
+    case PSCI_0_2_FN64_CPU_SUSPEND:
     {
         uint32_t pstate = PSCI_ARG32(regs, 1);
         register_t epoint = PSCI_ARG(regs, 2);
@@ -294,8 +294,8 @@ bool do_vpsci_0_2_call(struct cpu_user_regs *regs, uint32_t fid)
         return true;
     }
 
-    case PSCI_0_2_FN32(AFFINITY_INFO):
-    case PSCI_0_2_FN64(AFFINITY_INFO):
+    case PSCI_0_2_FN32_AFFINITY_INFO:
+    case PSCI_0_2_FN64_AFFINITY_INFO:
     {
         register_t taff = PSCI_ARG(regs, 1);
         uint32_t laff = PSCI_ARG32(regs, 2);
diff --git a/xen/include/asm-arm/psci.h b/xen/include/asm-arm/psci.h
index 3c44468e72..becc9f9ded 100644
--- a/xen/include/asm-arm/psci.h
+++ b/xen/include/asm-arm/psci.h
@@ -23,22 +23,27 @@ void call_psci_system_off(void);
 void call_psci_system_reset(void);
 
 /* PSCI v0.2 interface */
-#define PSCI_0_2_FN32(name) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,             \
-                                               ARM_SMCCC_CONV_32,               \
-                                               ARM_SMCCC_OWNER_STANDARD,        \
-                                               PSCI_0_2_FN_##name)
-#define PSCI_0_2_FN64(name) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,             \
-                                               ARM_SMCCC_CONV_64,               \
-                                               ARM_SMCCC_OWNER_STANDARD,        \
-                                               PSCI_0_2_FN_##name)
-#define PSCI_0_2_FN_PSCI_VERSION        0
-#define PSCI_0_2_FN_CPU_SUSPEND         1
-#define PSCI_0_2_FN_CPU_OFF             2
-#define PSCI_0_2_FN_CPU_ON              3
-#define PSCI_0_2_FN_AFFINITY_INFO       4
-#define PSCI_0_2_FN_MIGRATE_INFO_TYPE   6
-#define PSCI_0_2_FN_SYSTEM_OFF          8
-#define PSCI_0_2_FN_SYSTEM_RESET        9
+#define PSCI_0_2_FN32(nr) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,             \
+                                             ARM_SMCCC_CONV_32,               \
+                                             ARM_SMCCC_OWNER_STANDARD,        \
+                                             nr)
+#define PSCI_0_2_FN64(nr) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,             \
+                                             ARM_SMCCC_CONV_64,               \
+                                             ARM_SMCCC_OWNER_STANDARD,        \
+                                             nr)
+
+#define PSCI_0_2_FN32_PSCI_VERSION        PSCI_0_2_FN32(0)
+#define PSCI_0_2_FN32_CPU_SUSPEND         PSCI_0_2_FN32(1)
+#define PSCI_0_2_FN32_CPU_OFF             PSCI_0_2_FN32(2)
+#define PSCI_0_2_FN32_CPU_ON              PSCI_0_2_FN32(3)
+#define PSCI_0_2_FN32_AFFINITY_INFO       PSCI_0_2_FN32(4)
+#define PSCI_0_2_FN32_MIGRATE_INFO_TYPE   PSCI_0_2_FN32(6)
+#define PSCI_0_2_FN32_SYSTEM_OFF          PSCI_0_2_FN32(8)
+#define PSCI_0_2_FN32_SYSTEM_RESET        PSCI_0_2_FN32(9)
+
+#define PSCI_0_2_FN64_CPU_SUSPEND         PSCI_0_2_FN64(1)
+#define PSCI_0_2_FN64_CPU_ON              PSCI_0_2_FN64(3)
+#define PSCI_0_2_FN64_AFFINITY_INFO       PSCI_0_2_FN64(4)
 
 /* PSCI v0.2 affinity level state returned by AFFINITY_INFO */
 #define PSCI_0_2_AFFINITY_LEVEL_ON      0
-- 
2.11.0


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