Merge tag 'arm64-suspend' of git://linux-arm.org/linux-2.6-lp into upstream

* tag 'arm64-suspend' of git://linux-arm.org/linux-2.6-lp:
  arm64: add CPU power management menu/entries
  arm64: kernel: add PM build infrastructure
  arm64: kernel: add CPU idle call
  arm64: enable generic clockevent broadcast
  arm64: kernel: implement HW breakpoints CPU PM notifier
  arm64: kernel: refactor code to install/uninstall breakpoints
  arm: kvm: implement CPU PM notifier
  arm64: kernel: implement fpsimd CPU PM notifier
  arm64: kernel: cpu_{suspend/resume} implementation
  arm64: kernel: suspend/resume registers save/restore
  arm64: kernel: build MPIDR_EL1 hash function data structure
  arm64: kernel: add MPIDR_EL1 accessors macros

Conflicts:
	arch/arm64/Kconfig

6 files changed, 60 insertions, 1 deletions

diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h
index c4cdb5e5b73d..152413076503 100644
--- a/arch/arm64/include/asm/cpu_ops.h
+++ b/arch/arm64/include/asm/cpu_ops.h
@@ -39,6 +39,9 @@ struct device_node;
  *              from the cpu to be killed.
  * @cpu_die:    Makes a cpu leave the kernel. Must not fail. Called from the
  *              cpu being killed.
+ * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing
+ *               to wrong parameters or error conditions. Called from the
+ *               CPU being suspended. Must be called with IRQs disabled.
  */
 struct cpu_operations {
         const char      *name;
@@ -50,6 +53,9 @@ struct cpu_operations {
         int             (*cpu_disable)(unsigned int cpu);
         void            (*cpu_die)(unsigned int cpu);
 #endif
+#ifdef CONFIG_ARM64_CPU_SUSPEND
+        int             (*cpu_suspend)(unsigned long);
+#endif
 };
 
 extern const struct cpu_operations *cpu_ops[NR_CPUS];
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index e1af1b4200d5..c404fb0df3a6 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -20,6 +20,16 @@
 
 #define MPIDR_HWID_BITMASK      0xff00ffffff
 
+#define MPIDR_LEVEL_BITS_SHIFT  3
+#define MPIDR_LEVEL_BITS        (1 << MPIDR_LEVEL_BITS_SHIFT)
+#define MPIDR_LEVEL_MASK        ((1 << MPIDR_LEVEL_BITS) - 1)
+
+#define MPIDR_LEVEL_SHIFT(level) \
+        (((1 << level) >> 1) << MPIDR_LEVEL_BITS_SHIFT)
+
+#define MPIDR_AFFINITY_LEVEL(mpidr, level) \
+        ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & MPIDR_LEVEL_MASK)
+
 #define read_cpuid(reg) ({                                              \
         u64 __val;                                                      \
         asm("mrs        %0, " #reg : "=r" (__val));                     \
diff --git a/arch/arm64/include/asm/hardirq.h b/arch/arm64/include/asm/hardirq.h
index 990c051e7829..ae4801d77514 100644
--- a/arch/arm64/include/asm/hardirq.h
+++ b/arch/arm64/include/asm/hardirq.h
@@ -20,7 +20,7 @@
 #include <linux/threads.h>
 #include <asm/irq.h>
 
-#define NR_IPI  4
+#define NR_IPI  5
 
 typedef struct {
         unsigned int __softirq_pending;
diff --git a/arch/arm64/include/asm/proc-fns.h b/arch/arm64/include/asm/proc-fns.h
index 7cdf466fd0c5..0c657bb54597 100644
--- a/arch/arm64/include/asm/proc-fns.h
+++ b/arch/arm64/include/asm/proc-fns.h
@@ -26,11 +26,14 @@
 #include <asm/page.h>
 
 struct mm_struct;
+struct cpu_suspend_ctx;
 
 extern void cpu_cache_off(void);
 extern void cpu_do_idle(void);
 extern void cpu_do_switch_mm(unsigned long pgd_phys, struct mm_struct *mm);
 extern void cpu_reset(unsigned long addr) __attribute__((noreturn));
+extern void cpu_do_suspend(struct cpu_suspend_ctx *ptr);
+extern u64 cpu_do_resume(phys_addr_t ptr, u64 idmap_ttbr);
 
 #include <asm/memory.h>
 
diff --git a/arch/arm64/include/asm/smp_plat.h b/arch/arm64/include/asm/smp_plat.h
index ed43a0d2b1b2..59e282311b58 100644
--- a/arch/arm64/include/asm/smp_plat.h
+++ b/arch/arm64/include/asm/smp_plat.h
@@ -21,6 +21,19 @@
 
 #include <asm/types.h>
 
+struct mpidr_hash {
+        u64     mask;
+        u32     shift_aff[4];
+        u32     bits;
+};
+
+extern struct mpidr_hash mpidr_hash;
+
+static inline u32 mpidr_hash_size(void)
+{
+        return 1 << mpidr_hash.bits;
+}
+
 /*
  * Logical CPU mapping.
  */
diff --git a/arch/arm64/include/asm/suspend.h b/arch/arm64/include/asm/suspend.h
new file mode 100644
index 000000000000..e9c149c042e0
--- /dev/null
+++ b/arch/arm64/include/asm/suspend.h
@@ -0,0 +1,27 @@
+#ifndef __ASM_SUSPEND_H
+#define __ASM_SUSPEND_H
+
+#define NR_CTX_REGS 11
+
+/*
+ * struct cpu_suspend_ctx must be 16-byte aligned since it is allocated on
+ * the stack, which must be 16-byte aligned on v8
+ */
+struct cpu_suspend_ctx {
+        /*
+         * This struct must be kept in sync with
+         * cpu_do_{suspend/resume} in mm/proc.S
+         */
+        u64 ctx_regs[NR_CTX_REGS];
+        u64 sp;
+} __aligned(16);
+
+struct sleep_save_sp {
+        phys_addr_t *save_ptr_stash;
+        phys_addr_t save_ptr_stash_phys;
+};
+
+extern void cpu_resume(void);
+extern int cpu_suspend(unsigned long);
+
+#endif