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-rw-r--r--arch/powerpc/kernel/paca.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c
index 3f91ccaa9c74..8d96169c597e 100644
--- a/arch/powerpc/kernel/paca.c
+++ b/arch/powerpc/kernel/paca.c
@@ -16,6 +16,7 @@
#include <asm/kexec.h>
#include <asm/svm.h>
#include <asm/ultravisor.h>
+#include <asm/rtas.h>
#include "setup.h"
@@ -164,6 +165,30 @@ static struct slb_shadow * __init new_slb_shadow(int cpu, unsigned long limit)
#endif /* CONFIG_PPC_BOOK3S_64 */
+#ifdef CONFIG_PPC_PSERIES
+/**
+ * new_rtas_args() - Allocates rtas args
+ * @cpu: CPU number
+ * @limit: Memory limit for this allocation
+ *
+ * Allocates a struct rtas_args and return it's pointer,
+ * if not in Hypervisor mode
+ *
+ * Return: Pointer to allocated rtas_args
+ * NULL if CPU in Hypervisor Mode
+ */
+static struct rtas_args * __init new_rtas_args(int cpu, unsigned long limit)
+{
+ limit = min_t(unsigned long, limit, RTAS_INSTANTIATE_MAX);
+
+ if (early_cpu_has_feature(CPU_FTR_HVMODE))
+ return NULL;
+
+ return alloc_paca_data(sizeof(struct rtas_args), L1_CACHE_BYTES,
+ limit, cpu);
+}
+#endif /* CONFIG_PPC_PSERIES */
+
/* The Paca is an array with one entry per processor. Each contains an
* lppaca, which contains the information shared between the
* hypervisor and Linux.
@@ -202,6 +227,10 @@ void __init __nostackprotector initialise_paca(struct paca_struct *new_paca, int
/* For now -- if we have threads this will be adjusted later */
new_paca->tcd_ptr = &new_paca->tcd;
#endif
+
+#ifdef CONFIG_PPC_PSERIES
+ new_paca->rtas_args_reentrant = NULL;
+#endif
}
/* Put the paca pointer into r13 and SPRG_PACA */
@@ -274,6 +303,9 @@ void __init allocate_paca(int cpu)
#ifdef CONFIG_PPC_BOOK3S_64
paca->slb_shadow_ptr = new_slb_shadow(cpu, limit);
#endif
+#ifdef CONFIG_PPC_PSERIES
+ paca->rtas_args_reentrant = new_rtas_args(cpu, limit);
+#endif
paca_struct_size += sizeof(struct paca_struct);
}