Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "Mostly refactoring/clean-up:

   - CPU ops and PSCI (Power State Coordination Interface) refactoring
     following the merging of the arm64 ACPI support, together with
     handling of Trusted (secure) OS instances

   - Using fixmap for permanent FDT mapping, removing the initial dtb
     placement requirements (within 512MB from the start of the kernel
     image).  This required moving the FDT self reservation out of the
     memreserve processing

   - Idmap (1:1 mapping used for MMU on/off) handling clean-up

   - Removing flush_cache_all() - not safe on ARM unless the MMU is off.
     Last stages of CPU power down/up are handled by firmware already

   - "Alternatives" (run-time code patching) refactoring and support for
     immediate branch patching, GICv3 CPU interface access

   - User faults handling clean-up

  And some fixes:

   - Fix for VDSO building with broken ELF toolchains

   - Fix another case of init_mm.pgd usage for user mappings (during
     ASID roll-over broadcasting)

   - Fix for FPSIMD reloading after CPU hotplug

   - Fix for missing syscall trace exit

   - Workaround for .inst asm bug

   - Compat fix for switching the user tls tpidr_el0 register"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (42 commits)
  arm64: use private ratelimit state along with show_unhandled_signals
  arm64: show unhandled SP/PC alignment faults
  arm64: vdso: work-around broken ELF toolchains in Makefile
  arm64: kernel: rename __cpu_suspend to keep it aligned with arm
  arm64: compat: print compat_sp instead of sp
  arm64: mm: Fix freeing of the wrong memmap entries with !SPARSEMEM_VMEMMAP
  arm64: entry: fix context tracking for el0_sp_pc
  arm64: defconfig: enable memtest
  arm64: mm: remove reference to tlb.S from comment block
  arm64: Do not attempt to use init_mm in reset_context()
  arm64: KVM: Switch vgic save/restore to alternative_insn
  arm64: alternative: Introduce feature for GICv3 CPU interface
  arm64: psci: fix !CONFIG_HOTPLUG_CPU build warning
  arm64: fix bug for reloading FPSIMD state after CPU hotplug.
  arm64: kernel thread don't need to save fpsimd context.
  arm64: fix missing syscall trace exit
  arm64: alternative: Work around .inst assembler bugs
  arm64: alternative: Merge alternative-asm.h into alternative.h
  arm64: alternative: Allow immediate branch as alternative instruction
  arm64: Rework alternate sequence for ARM erratum 845719
  ...

1 files changed, 9 insertions, 3 deletions

diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 0948d327d013..b1fc69cd1499 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -115,8 +115,7 @@ static void __do_user_fault(struct task_struct *tsk, unsigned long addr,
 {
         struct siginfo si;
 
-        if (show_unhandled_signals && unhandled_signal(tsk, sig) &&
-            printk_ratelimit()) {
+        if (show_unhandled_signals_ratelimited() && unhandled_signal(tsk, sig)) {
                 pr_info("%s[%d]: unhandled %s (%d) at 0x%08lx, esr 0x%03x\n",
                         tsk->comm, task_pid_nr(tsk), fault_name(esr), sig,
                         addr, esr);
@@ -478,12 +477,19 @@ asmlinkage void __exception do_sp_pc_abort(unsigned long addr,
                                            struct pt_regs *regs)
 {
         struct siginfo info;
+        struct task_struct *tsk = current;
+
+        if (show_unhandled_signals && unhandled_signal(tsk, SIGBUS))
+                pr_info_ratelimited("%s[%d]: %s exception: pc=%p sp=%p\n",
+                                    tsk->comm, task_pid_nr(tsk),
+                                    esr_get_class_string(esr), (void *)regs->pc,
+                                    (void *)regs->sp);
 
         info.si_signo = SIGBUS;
         info.si_errno = 0;
         info.si_code  = BUS_ADRALN;
         info.si_addr  = (void __user *)addr;
-        arm64_notify_die("", regs, &info, esr);
+        arm64_notify_die("Oops - SP/PC alignment exception", regs, &info, esr);
 }
 
 static struct fault_info debug_fault_info[] = {