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-rw-r--r--arch/powerpc/include/asm/cputhreads.h30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cputhreads.h b/arch/powerpc/include/asm/cputhreads.h
index 98c8bd155bf9..b167186aaee4 100644
--- a/arch/powerpc/include/asm/cputhreads.h
+++ b/arch/powerpc/include/asm/cputhreads.h
@@ -98,6 +98,36 @@ static inline int cpu_last_thread_sibling(int cpu)
return cpu | (threads_per_core - 1);
}
+/*
+ * tlb_thread_siblings are siblings which share a TLB. This is not
+ * architected, is not something a hypervisor could emulate and a future
+ * CPU may change behaviour even in compat mode, so this should only be
+ * used on PowerNV, and only with care.
+ */
+static inline int cpu_first_tlb_thread_sibling(int cpu)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && (threads_per_core == 8))
+ return cpu & ~0x6; /* Big Core */
+ else
+ return cpu_first_thread_sibling(cpu);
+}
+
+static inline int cpu_last_tlb_thread_sibling(int cpu)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && (threads_per_core == 8))
+ return cpu | 0x6; /* Big Core */
+ else
+ return cpu_last_thread_sibling(cpu);
+}
+
+static inline int cpu_tlb_thread_sibling_step(void)
+{
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && (threads_per_core == 8))
+ return 2; /* Big Core */
+ else
+ return 1;
+}
+
static inline u32 get_tensr(void)
{
#ifdef CONFIG_BOOKE