Linux-libre 4.4-gnupck-4.4-gnu

1 files changed, 101 insertions, 18 deletions

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 07d1811aa..871f21783 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -27,6 +27,7 @@ config ARM64
 	select CPU_PM if (SUSPEND || CPU_IDLE)
 	select DCACHE_WORD_ACCESS
 	select EDAC_SUPPORT
+	select FRAME_POINTER
 	select GENERIC_ALLOCATOR
 	select GENERIC_CLOCKEVENTS
 	select GENERIC_CLOCKEVENTS_BROADCAST
@@ -48,6 +49,7 @@ config ARM64
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_BITREVERSE
 	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48)
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_TRACEHOOK
@@ -75,6 +77,7 @@ config ARM64
 	select HAVE_PERF_USER_STACK_DUMP
 	select HAVE_RCU_TABLE_FREE
 	select HAVE_SYSCALL_TRACEPOINTS
+	select IOMMU_DMA if IOMMU_SUPPORT
 	select IRQ_DOMAIN
 	select IRQ_FORCED_THREADING
 	select MODULES_USE_ELF_RELA
@@ -169,10 +172,12 @@ config FIX_EARLYCON_MEM
 
 config PGTABLE_LEVELS
 	int
+	default 2 if ARM64_16K_PAGES && ARM64_VA_BITS_36
 	default 2 if ARM64_64K_PAGES && ARM64_VA_BITS_42
 	default 3 if ARM64_64K_PAGES && ARM64_VA_BITS_48
 	default 3 if ARM64_4K_PAGES && ARM64_VA_BITS_39
-	default 4 if ARM64_4K_PAGES && ARM64_VA_BITS_48
+	default 3 if ARM64_16K_PAGES && ARM64_VA_BITS_47
+	default 4 if !ARM64_64K_PAGES && ARM64_VA_BITS_48
 
 source "init/Kconfig"
 
@@ -311,6 +316,27 @@ config ARM64_ERRATUM_832075
 
 	  If unsure, say Y.
 
+config ARM64_ERRATUM_834220
+	bool "Cortex-A57: 834220: Stage 2 translation fault might be incorrectly reported in presence of a Stage 1 fault"
+	depends on KVM
+	default y
+	help
+	  This option adds an alternative code sequence to work around ARM
+	  erratum 834220 on Cortex-A57 parts up to r1p2.
+
+	  Affected Cortex-A57 parts might report a Stage 2 translation
+	  fault as the result of a Stage 1 fault for load crossing a
+	  page boundary when there is a permission or device memory
+	  alignment fault at Stage 1 and a translation fault at Stage 2.
+
+	  The workaround is to verify that the Stage 1 translation
+	  doesn't generate a fault before handling the Stage 2 fault.
+	  Please note that this does not necessarily enable the workaround,
+	  as it depends on the alternative framework, which will only patch
+	  the kernel if an affected CPU is detected.
+
+	  If unsure, say Y.
+
 config ARM64_ERRATUM_845719
 	bool "Cortex-A53: 845719: a load might read incorrect data"
 	depends on COMPAT
@@ -348,6 +374,33 @@ config ARM64_ERRATUM_843419
 
 	  If unsure, say Y.
 
+config CAVIUM_ERRATUM_22375
+	bool "Cavium erratum 22375, 24313"
+	default y
+	help
+	  Enable workaround for erratum 22375, 24313.
+
+	  This implements two gicv3-its errata workarounds for ThunderX. Both
+	  with small impact affecting only ITS table allocation.
+
+	    erratum 22375: only alloc 8MB table size
+	    erratum 24313: ignore memory access type
+
+	  The fixes are in ITS initialization and basically ignore memory access
+	  type and table size provided by the TYPER and BASER registers.
+
+	  If unsure, say Y.
+
+config CAVIUM_ERRATUM_23154
+	bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed"
+	default y
+	help
+	  The gicv3 of ThunderX requires a modified version for
+	  reading the IAR status to ensure data synchronization
+	  (access to icc_iar1_el1 is not sync'ed before and after).
+
+	  If unsure, say Y.
+
 endmenu
 
 
@@ -362,25 +415,37 @@ config ARM64_4K_PAGES
 	help
 	  This feature enables 4KB pages support.
 
+config ARM64_16K_PAGES
+	bool "16KB"
+	help
+	  The system will use 16KB pages support. AArch32 emulation
+	  requires applications compiled with 16K (or a multiple of 16K)
+	  aligned segments.
+
 config ARM64_64K_PAGES
 	bool "64KB"
 	help
 	  This feature enables 64KB pages support (4KB by default)
 	  allowing only two levels of page tables and faster TLB
-	  look-up. AArch32 emulation is not available when this feature
-	  is enabled.
+	  look-up. AArch32 emulation requires applications compiled
+	  with 64K aligned segments.
 
 endchoice
 
 choice
 	prompt "Virtual address space size"
 	default ARM64_VA_BITS_39 if ARM64_4K_PAGES
+	default ARM64_VA_BITS_47 if ARM64_16K_PAGES
 	default ARM64_VA_BITS_42 if ARM64_64K_PAGES
 	help
 	  Allows choosing one of multiple possible virtual address
 	  space sizes. The level of translation table is determined by
 	  a combination of page size and virtual address space size.
 
+config ARM64_VA_BITS_36
+	bool "36-bit" if EXPERT
+	depends on ARM64_16K_PAGES
+
 config ARM64_VA_BITS_39
 	bool "39-bit"
 	depends on ARM64_4K_PAGES
@@ -389,6 +454,10 @@ config ARM64_VA_BITS_42
 	bool "42-bit"
 	depends on ARM64_64K_PAGES
 
+config ARM64_VA_BITS_47
+	bool "47-bit"
+	depends on ARM64_16K_PAGES
+
 config ARM64_VA_BITS_48
 	bool "48-bit"
 
@@ -396,8 +465,10 @@ endchoice
 
 config ARM64_VA_BITS
 	int
+	default 36 if ARM64_VA_BITS_36
 	default 39 if ARM64_VA_BITS_39
 	default 42 if ARM64_VA_BITS_42
+	default 47 if ARM64_VA_BITS_47
 	default 48 if ARM64_VA_BITS_48
 
 config CPU_BIG_ENDIAN
@@ -427,15 +498,13 @@ config NR_CPUS
 
 config HOTPLUG_CPU
 	bool "Support for hot-pluggable CPUs"
+	select GENERIC_IRQ_MIGRATION
 	help
 	  Say Y here to experiment with turning CPUs off and on.  CPUs
 	  can be controlled through /sys/devices/system/cpu.
 
 source kernel/Kconfig.preempt
-
-config HZ
-	int
-	default 100
+source kernel/Kconfig.hz
 
 config ARCH_HAS_HOLES_MEMORYMODEL
 	def_bool y if SPARSEMEM
@@ -454,12 +523,8 @@ config HAVE_ARCH_PFN_VALID
 	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
 
 config HW_PERF_EVENTS
-	bool "Enable hardware performance counter support for perf events"
-	depends on PERF_EVENTS
-	default y
-	help
-	  Enable hardware performance counter support for perf events. If
-	  disabled, perf events will use software events only.
+	def_bool y
+	depends on ARM_PMU
 
 config SYS_SUPPORTS_HUGETLBFS
 	def_bool y
@@ -468,7 +533,7 @@ config ARCH_WANT_GENERAL_HUGETLB
 	def_bool y
 
 config ARCH_WANT_HUGE_PMD_SHARE
-	def_bool y if !ARM64_64K_PAGES
+	def_bool y if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
 
 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
 	def_bool y
@@ -505,7 +570,25 @@ config XEN
 config FORCE_MAX_ZONEORDER
 	int
 	default "14" if (ARM64_64K_PAGES && TRANSPARENT_HUGEPAGE)
+	default "12" if (ARM64_16K_PAGES && TRANSPARENT_HUGEPAGE)
 	default "11"
+	help
+	  The kernel memory allocator divides physically contiguous memory
+	  blocks into "zones", where each zone is a power of two number of
+	  pages.  This option selects the largest power of two that the kernel
+	  keeps in the memory allocator.  If you need to allocate very large
+	  blocks of physically contiguous memory, then you may need to
+	  increase this value.
+
+	  This config option is actually maximum order plus one. For example,
+	  a value of 11 means that the largest free memory block is 2^10 pages.
+
+	  We make sure that we can allocate upto a HugePage size for each configuration.
+	  Hence we have :
+		MAX_ORDER = (PMD_SHIFT - PAGE_SHIFT) + 1 => PAGE_SHIFT - 2
+
+	  However for 4K, we choose a higher default value, 11 as opposed to 10, giving us
+	  4M allocations matching the default size used by generic code.
 
 menuconfig ARMV8_DEPRECATED
 	bool "Emulate deprecated/obsolete ARMv8 instructions"
@@ -680,7 +763,7 @@ source "fs/Kconfig.binfmt"
 
 config COMPAT
 	bool "Kernel support for 32-bit EL0"
-	depends on !ARM64_64K_PAGES || EXPERT
+	depends on ARM64_4K_PAGES || EXPERT
 	select COMPAT_BINFMT_ELF
 	select HAVE_UID16
 	select OLD_SIGSUSPEND3
@@ -691,9 +774,9 @@ config COMPAT
 	  the user helper functions, VFP support and the ptrace interface are
 	  handled appropriately by the kernel.
 
-	  If you also enabled CONFIG_ARM64_64K_PAGES, please be aware that you
-	  will only be able to execute AArch32 binaries that were compiled with
-	  64k aligned segments.
+	  If you use a page size other than 4KB (i.e, 16KB or 64KB), please be aware
+	  that you will only be able to execute AArch32 binaries that were compiled
+	  with page size aligned segments.
 
 	  If you want to execute 32-bit userspace applications, say Y.