Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - Initial round of Spectre variant 1 and variant 2 fixes for 32-bit ARM

 - Clang support improvements

 - nommu updates for v8 MPU

 - enable ARM_MODULE_PLTS by default to avoid problems loading modules
   with larger kernels

 - vmlinux.lds and dma-mapping cleanups

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (31 commits)
  ARM: spectre-v1: fix syscall entry
  ARM: spectre-v1: add array_index_mask_nospec() implementation
  ARM: spectre-v1: add speculation barrier (csdb) macros
  ARM: KVM: report support for SMCCC_ARCH_WORKAROUND_1
  ARM: KVM: Add SMCCC_ARCH_WORKAROUND_1 fast handling
  ARM: spectre-v2: KVM: invalidate icache on guest exit for Brahma B15
  ARM: KVM: invalidate icache on guest exit for Cortex-A15
  ARM: KVM: invalidate BTB on guest exit for Cortex-A12/A17
  ARM: spectre-v2: warn about incorrect context switching functions
  ARM: spectre-v2: add firmware based hardening
  ARM: spectre-v2: harden user aborts in kernel space
  ARM: spectre-v2: add Cortex A8 and A15 validation of the IBE bit
  ARM: spectre-v2: harden branch predictor on context switches
  ARM: spectre: add Kconfig symbol for CPUs vulnerable to Spectre
  ARM: bugs: add support for per-processor bug checking
  ARM: bugs: hook processor bug checking into SMP and suspend paths
  ARM: bugs: prepare processor bug infrastructure
  ARM: add more CPU part numbers for Cortex and Brahma B15 CPUs
  ARM: 8774/1: remove no-op macro VMLINUX_SYMBOL()
  ARM: 8773/1: amba: Export amba_bustype
  ...

diff --cc arch/arm/Kconfig
Simple merge

diff --cc arch/arm/Makefile
Simple merge

diff --cc arch/arm/include/asm/kvm_host.h
Simple merge

diff --cc arch/arm/include/asm/kvm_mmu.h
index f675162663f09a054253b8ad6d86361c74968618,cf2eae51f9a05dc5707c65e3493588841d6c4fad..c94d291fd1a83bcd7e487af70c39d54430bd4b33
--- 1/arch/arm/include/asm/kvm_mmu.h
--- 2/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@@ -309,25 -309,30 +309,46 @@@ static inline unsigned int kvm_get_vmid
        return 8;
  }
  
 +/*
 + * We are not in the kvm->srcu critical section most of the time, so we take
 + * the SRCU read lock here. Since we copy the data from the user page, we
 + * can immediately drop the lock again.
 + */
 +static inline int kvm_read_guest_lock(struct kvm *kvm,
 +                                    gpa_t gpa, void *data, unsigned long len)
 +{
 +      int srcu_idx = srcu_read_lock(&kvm->srcu);
 +      int ret = kvm_read_guest(kvm, gpa, data, len);
 +
 +      srcu_read_unlock(&kvm->srcu, srcu_idx);
 +
 +      return ret;
 +}
 +
  static inline void *kvm_get_hyp_vector(void)
  {
-       return kvm_ksym_ref(__kvm_hyp_vector);
+       switch(read_cpuid_part()) {
+ #ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
+       case ARM_CPU_PART_CORTEX_A12:
+       case ARM_CPU_PART_CORTEX_A17:
+       {
+               extern char __kvm_hyp_vector_bp_inv[];
+               return kvm_ksym_ref(__kvm_hyp_vector_bp_inv);
+       }
+ 
+       case ARM_CPU_PART_BRAHMA_B15:
+       case ARM_CPU_PART_CORTEX_A15:
+       {
+               extern char __kvm_hyp_vector_ic_inv[];
+               return kvm_ksym_ref(__kvm_hyp_vector_ic_inv);
+       }
+ #endif
+       default:
+       {
+               extern char __kvm_hyp_vector[];
+               return kvm_ksym_ref(__kvm_hyp_vector);
+       }
+       }
  }
  
  static inline int kvm_map_vectors(void)

diff --cc arch/arm/mm/Kconfig
Simple merge

diff --cc arch/arm/mm/dma-mapping.c
Simple merge

diff --cc arch/arm/mm/fault.c
index 32034543f49c13c77aed2cc0770cc8114e0b37ae,3b1ba003c4f9c56b2f20b46db0e96012945494f7..84becc911ee3347df1e43feae344d52eda425fef
--- 1/arch/arm/mm/fault.c
--- 2/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@@ -163,8 -163,9 +163,11 @@@ __do_user_fault(struct task_struct *tsk
  {
        struct siginfo si;
  
+       if (addr > TASK_SIZE)
+               harden_branch_predictor();
+ 
 +      clear_siginfo(&si);
 +
  #ifdef CONFIG_DEBUG_USER
        if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) ||
            ((user_debug & UDBG_BUS)  && (sig == SIGBUS))) {

diff --cc drivers/amba/bus.c
index 3ece711a6a178624c925f3e008fe4db8dabf9d1d,12283bd06733cc1e4211d96fe3b5012a0e21fc81..41b706403ef72ec94848b7dae98867ecd30ec971
--- 1/drivers/amba/bus.c
--- 2/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@@ -202,9 -194,10 +202,10 @@@ struct bus_type amba_bustype = 
        .dev_groups     = amba_dev_groups,
        .match          = amba_match,
        .uevent         = amba_uevent,
 +      .dma_configure  = platform_dma_configure,
        .pm             = &amba_pm,
 -      .force_dma      = true,
  };
+ EXPORT_SYMBOL_GPL(amba_bustype);
  
  static int __init amba_init(void)
  {