Merge branch 'irq/for-gpio' into irq/core

Merge the request/release callbacks which are in a separate branch for
consumption by the gpio folks.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 43 insertions, 8 deletions

diff --git a/arch/arm64/include/asm/percpu.h b/arch/arm64/include/asm/percpu.h
index 13fb0b3efc5f..453a179469a3 100644
--- a/arch/arm64/include/asm/percpu.h
+++ b/arch/arm64/include/asm/percpu.h
@@ -16,6 +16,8 @@
 #ifndef __ASM_PERCPU_H
 #define __ASM_PERCPU_H
 
+#ifdef CONFIG_SMP
+
 static inline void set_my_cpu_offset(unsigned long off)
 {
         asm volatile("msr tpidr_el1, %0" :: "r" (off) : "memory");
@@ -36,6 +38,12 @@ static inline unsigned long __my_cpu_offset(void)
 }
 #define __my_cpu_offset __my_cpu_offset()
 
+#else   /* !CONFIG_SMP */
+
+#define set_my_cpu_offset(x)    do { } while (0)
+
+#endif /* CONFIG_SMP */
+
 #include <asm-generic/percpu.h>
 
 #endif /* __ASM_PERCPU_H */
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index b524dcd17243..aa3917c8b623 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -136,11 +136,11 @@ extern struct page *empty_zero_page;
 /*
  * The following only work if pte_present(). Undefined behaviour otherwise.
  */
-#define pte_present(pte)        (pte_val(pte) & (PTE_VALID | PTE_PROT_NONE))
-#define pte_dirty(pte)          (pte_val(pte) & PTE_DIRTY)
-#define pte_young(pte)          (pte_val(pte) & PTE_AF)
-#define pte_special(pte)        (pte_val(pte) & PTE_SPECIAL)
-#define pte_write(pte)          (pte_val(pte) & PTE_WRITE)
+#define pte_present(pte)        (!!(pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)))
+#define pte_dirty(pte)          (!!(pte_val(pte) & PTE_DIRTY))
+#define pte_young(pte)          (!!(pte_val(pte) & PTE_AF))
+#define pte_special(pte)        (!!(pte_val(pte) & PTE_SPECIAL))
+#define pte_write(pte)          (!!(pte_val(pte) & PTE_WRITE))
 #define pte_exec(pte)           (!(pte_val(pte) & PTE_UXN))
 
 #define pte_valid_user(pte) \
diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c
index c3b6c63ea5fb..38f0558f0c0a 100644
--- a/arch/arm64/kernel/stacktrace.c
+++ b/arch/arm64/kernel/stacktrace.c
@@ -48,7 +48,11 @@ int unwind_frame(struct stackframe *frame)
 
         frame->sp = fp + 0x10;
         frame->fp = *(unsigned long *)(fp);
-        frame->pc = *(unsigned long *)(fp + 8);
+        /*
+         * -4 here because we care about the PC at time of bl,
+         * not where the return will go.
+         */
+        frame->pc = *(unsigned long *)(fp + 8) - 4;
 
         return 0;
 }
diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
index 3b47c36e10ff..2c56012cb2d2 100644
--- a/arch/arm64/kvm/hyp.S
+++ b/arch/arm64/kvm/hyp.S
@@ -694,6 +694,24 @@ __hyp_panic_str:
 
         .align  2
 
+/*
+ * u64 kvm_call_hyp(void *hypfn, ...);
+ *
+ * This is not really a variadic function in the classic C-way and care must
+ * be taken when calling this to ensure parameters are passed in registers
+ * only, since the stack will change between the caller and the callee.
+ *
+ * Call the function with the first argument containing a pointer to the
+ * function you wish to call in Hyp mode, and subsequent arguments will be
+ * passed as x0, x1, and x2 (a maximum of 3 arguments in addition to the
+ * function pointer can be passed).  The function being called must be mapped
+ * in Hyp mode (see init_hyp_mode in arch/arm/kvm/arm.c).  Return values are
+ * passed in r0 and r1.
+ *
+ * A function pointer with a value of 0 has a special meaning, and is
+ * used to implement __hyp_get_vectors in the same way as in
+ * arch/arm64/kernel/hyp_stub.S.
+ */
 ENTRY(kvm_call_hyp)
         hvc     #0
         ret
@@ -737,7 +755,12 @@ el1_sync:					// Guest trapped into EL2
         pop     x2, x3
         pop     x0, x1
 
-        push    lr, xzr
+        /* Check for __hyp_get_vectors */
+        cbnz    x0, 1f
+        mrs     x0, vbar_el2
+        b       2f
+
+1:      push    lr, xzr
 
         /*
          * Compute the function address in EL2, and shuffle the parameters.
@@ -750,7 +773,7 @@ el1_sync:					// Guest trapped into EL2
         blr     lr
 
         pop     lr, xzr
-        eret
+2:      eret
 
 el1_trap:
         /*