xen/arm: vpsci: Removing dummy MIGRATE and MIGRATE_INFO_UP_CPU

The PSCI call MIGRATE and MIGRATE_INFO_UP_CPU are optional and
implemented as just returning PSCI_NOT_SUPPORTED (aka UNKNOWN_FUNCTION
for SMCCC).

The new SMCCC framework is able to deal with unimplemented function and
return the proper error code. So remove the implementations for both
function.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk@epam.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

diff --git a/xen/arch/arm/vpsci.c b/xen/arch/arm/vpsci.c
index cd724904ef1789952c5907dc9a2da7faebe13a6e..979d32ed6d287a545e71825ae458c0474182e838 100644 (file)
--- a/xen/arch/arm/vpsci.c
+++ b/xen/arch/arm/vpsci.c
@@ -172,21 +172,11 @@ int32_t do_psci_0_2_affinity_info(register_t target_affinity,
     return PSCI_0_2_AFFINITY_LEVEL_OFF;
 }
 
-int32_t do_psci_0_2_migrate(uint32_t target_cpu)
-{
-    return PSCI_NOT_SUPPORTED;
-}
-
 uint32_t do_psci_0_2_migrate_info_type(void)
 {
     return PSCI_0_2_TOS_MP_OR_NOT_PRESENT;
 }
 
-register_t do_psci_0_2_migrate_info_up_cpu(void)
-{
-    return PSCI_NOT_SUPPORTED;
-}
-
 void do_psci_0_2_system_off( void )
 {
     struct domain *d = current->domain;

diff --git a/xen/arch/arm/vsmc.c b/xen/arch/arm/vsmc.c
index c9064de37a0ed42a330d4a68d158cd76bca36f4c..997f2e0ebce78ff18ca8cf354913e0d333000e89 100644 (file)
--- a/xen/arch/arm/vsmc.c
+++ b/xen/arch/arm/vsmc.c
@@ -28,7 +28,7 @@
 #define XEN_SMCCC_FUNCTION_COUNT 3
 
 /* Number of functions currently supported by Standard Service Service Calls. */
-#define SSSC_SMCCC_FUNCTION_COUNT 13
+#define SSSC_SMCCC_FUNCTION_COUNT 11
 
 static bool fill_uid(struct cpu_user_regs *regs, xen_uuid_t uuid)
 {
@@ -157,11 +157,6 @@ static bool handle_sssc(struct cpu_user_regs *regs)
         PSCI_SET_RESULT(regs, do_psci_0_2_migrate_info_type());
         return true;
 
-    case PSCI_0_2_FN_MIGRATE_INFO_UP_CPU:
-        perfc_incr(vpsci_migrate_info_up_cpu);
-        PSCI_SET_RESULT(regs, do_psci_0_2_migrate_info_up_cpu());
-        return true;
-
     case PSCI_0_2_FN_SYSTEM_OFF:
         perfc_incr(vpsci_system_off);
         do_psci_0_2_system_off();
@@ -206,15 +201,6 @@ static bool handle_sssc(struct cpu_user_regs *regs)
         return true;
     }
 
-    case PSCI_0_2_FN_MIGRATE:
-    {
-        uint32_t tcpu = PSCI_ARG32(regs, 1);
-
-        perfc_incr(vpsci_cpu_migrate);
-        PSCI_SET_RESULT(regs, do_psci_0_2_migrate(tcpu));
-        return true;
-    }
-
     case ARM_SMCCC_FUNC_CALL_COUNT:
         return fill_function_call_count(regs, SSSC_SMCCC_FUNCTION_COUNT);
 

diff --git a/xen/include/asm-arm/perfc_defn.h b/xen/include/asm-arm/perfc_defn.h
index 5f957ee6ec954bde2df35f0f03de7f983b03ce32..a7acb7d21c5571ea736819a023a52b460aa20b5a 100644 (file)
--- a/xen/include/asm-arm/perfc_defn.h
+++ b/xen/include/asm-arm/perfc_defn.h
@@ -27,12 +27,10 @@ PERFCOUNTER(vpsci_cpu_on,              "vpsci: cpu_on")
 PERFCOUNTER(vpsci_cpu_off,             "vpsci: cpu_off")
 PERFCOUNTER(vpsci_version,             "vpsci: version")
 PERFCOUNTER(vpsci_migrate_info_type,   "vpsci: migrate_info_type")
-PERFCOUNTER(vpsci_migrate_info_up_cpu, "vpsci: migrate_info_up_cpu")
 PERFCOUNTER(vpsci_system_off,          "vpsci: system_off")
 PERFCOUNTER(vpsci_system_reset,        "vpsci: system_reset")
 PERFCOUNTER(vpsci_cpu_suspend,         "vpsci: cpu_suspend")
 PERFCOUNTER(vpsci_cpu_affinity_info,   "vpsci: cpu_affinity_info")
-PERFCOUNTER(vpsci_cpu_migrate,         "vpsci: cpu_migrate")
 
 PERFCOUNTER(vgicd_reads,                "vgicd: read")
 PERFCOUNTER(vgicd_writes,               "vgicd: write")

diff --git a/xen/include/asm-arm/psci.h b/xen/include/asm-arm/psci.h
index 635ea5dae4681eff423173a345c68c9971e5f44a..32c1f81f2190271408fe10d2c474c9f71db9128a 100644 (file)
--- a/xen/include/asm-arm/psci.h
+++ b/xen/include/asm-arm/psci.h
@@ -37,9 +37,7 @@ int32_t do_psci_0_2_cpu_on(register_t target_cpu, register_t entry_point,
                        register_t context_id);
 int32_t do_psci_0_2_affinity_info(register_t target_affinity,
                               uint32_t lowest_affinity_level);
-int32_t do_psci_0_2_migrate(uint32_t target_cpu);
 uint32_t do_psci_0_2_migrate_info_type(void);
-register_t do_psci_0_2_migrate_info_up_cpu(void);
 void do_psci_0_2_system_off(void);
 void do_psci_0_2_system_reset(void);
 
@@ -57,9 +55,7 @@ void do_psci_0_2_system_reset(void);
 #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             5
 #define PSCI_0_2_FN_MIGRATE_INFO_TYPE   6
-#define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU 7
 #define PSCI_0_2_FN_SYSTEM_OFF          8
 #define PSCI_0_2_FN_SYSTEM_RESET        9