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Commit 05bdb8c9 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linux 

Pull Xtensa updates from Chris Zankel:
 "Xtensa improvements for 3.17:
   - support highmem on cores with aliasing data cache.  Enable highmem
     on kc705 by default
   - simplify addition of new core variants (no need to modify Kconfig /
     Makefiles)
   - improve robustness of unaligned access handler and its interaction
     with window overflow/underflow exception handlers
   - deprecate atomic and spill registers syscalls
   - clean up Kconfig: remove orphan MATH_EMULATION, sort 'select'
     statements
   - wire up renameat2 syscall.

  Various fixes:
   - fix address checks in dma_{alloc,free}_coherent (runtime BUG)
   - fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage)
   - fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
     (runtime unrecoverable exception)
   - fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace
     register clobbering)
   - fix kernel/user jump out of fast_unaligned (potential runtime
     unrecoverabl exception)
   - replace termios IOCTL code definitions with constants (userspace
     build breakage)"

* tag 'xtensa-20140830' of git://github.com/czankel/xtensa-linux: (25 commits)
  xtensa: deprecate fast_xtensa and fast_spill_registers syscalls
  xtensa: don't allow overflow/underflow on unaligned stack
  xtensa: fix a6 and a7 handling in fast_syscall_xtensa
  xtensa: allow single-stepping through unaligned load/store
  xtensa: move invalid unaligned instruction handler closer to its users
  xtensa: make fast_unaligned store restartable
  xtensa: add double exception fixup handler for fast_unaligned
  xtensa: fix kernel/user jump out of fast_unaligned
  xtensa: configure kc705 for highmem
  xtensa: support highmem in aliasing cache flushing code
  xtensa: support aliasing cache in kmap
  xtensa: support aliasing cache in k[un]map_atomic
  xtensa: implement clear_user_highpage and copy_user_highpage
  xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
  xtensa: allow fixmap and kmap span more than one page table
  xtensa: make fixmap region addressing grow with index
  xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS
  xtensa: add renameat2 syscall
  xtensa: fix address checks in dma_{alloc,free}_coherent
  xtensa: replace IOCTL code definitions with constants
  ...
parents ca98565a e792290b

arch/xtensa/Kconfig

+75 −17
Original line number Diff line number Diff line
@@ -4,24 +4,23 @@ config ZONE_DMA 
config XTENSA

	def_bool y

	select ARCH_WANT_FRAME_POINTERS

	select HAVE_IDE

	select GENERIC_ATOMIC64

	select GENERIC_CLOCKEVENTS

	select VIRT_TO_BUS

	select GENERIC_IRQ_SHOW

	select GENERIC_SCHED_CLOCK

	select MODULES_USE_ELF_RELA

	select GENERIC_PCI_IOMAP

	select ARCH_WANT_IPC_PARSE_VERSION

	select ARCH_WANT_OPTIONAL_GPIOLIB

	select BUILDTIME_EXTABLE_SORT

	select CLONE_BACKWARDS

	select IRQ_DOMAIN

	select HAVE_OPROFILE

	select COMMON_CLK

	select GENERIC_ATOMIC64

	select GENERIC_CLOCKEVENTS

	select GENERIC_IRQ_SHOW

	select GENERIC_PCI_IOMAP

	select GENERIC_SCHED_CLOCK

	select HAVE_FUNCTION_TRACER

	select HAVE_IRQ_TIME_ACCOUNTING

	select HAVE_OPROFILE

	select HAVE_PERF_EVENTS

	select COMMON_CLK

	select IRQ_DOMAIN

	select MODULES_USE_ELF_RELA

	select VIRT_TO_BUS

	help

	  Xtensa processors are 32-bit RISC machines designed by Tensilica

	  primarily for embedded systems.  These processors are both
@@ -62,7 +61,9 @@ config TRACE_IRQFLAGS_SUPPORT 
	def_bool y



config MMU

	def_bool n

	bool

	default n if !XTENSA_VARIANT_CUSTOM

	default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM



config VARIANT_IRQ_SWITCH

	def_bool n
@@ -102,8 +103,40 @@ config XTENSA_VARIANT_S6000 
	select VARIANT_IRQ_SWITCH

	select ARCH_REQUIRE_GPIOLIB

	select XTENSA_CALIBRATE_CCOUNT



config XTENSA_VARIANT_CUSTOM

	bool "Custom Xtensa processor configuration"

	select MAY_HAVE_SMP

	select HAVE_XTENSA_GPIO32

	help

	  Select this variant to use a custom Xtensa processor configuration.

	  You will be prompted for a processor variant CORENAME.

endchoice



config XTENSA_VARIANT_CUSTOM_NAME

	string "Xtensa Processor Custom Core Variant Name"

	depends on XTENSA_VARIANT_CUSTOM

	help

	  Provide the name of a custom Xtensa processor variant.

	  This CORENAME selects arch/xtensa/variant/CORENAME.

	  Dont forget you have to select MMU if you have one.



config XTENSA_VARIANT_NAME

	string

	default "dc232b"			if XTENSA_VARIANT_DC232B

	default "dc233c"			if XTENSA_VARIANT_DC233C

	default "fsf"				if XTENSA_VARIANT_FSF

	default "s6000"				if XTENSA_VARIANT_S6000

	default XTENSA_VARIANT_CUSTOM_NAME	if XTENSA_VARIANT_CUSTOM



config XTENSA_VARIANT_MMU

	bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"

	depends on XTENSA_VARIANT_CUSTOM

	default y

	help

	  Build a Conventional Kernel with full MMU support,

	  ie: it supports a TLB with auto-loading, page protection.



config XTENSA_UNALIGNED_USER

	bool "Unaligned memory access in use space"

	help
@@ -156,13 +189,9 @@ config HOTPLUG_CPU 


	  Say N if you want to disable CPU hotplug.



config MATH_EMULATION

	bool "Math emulation"

	help

	Can we use information of configuration file?



config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX

	bool "Initialize Xtensa MMU inside the Linux kernel code"

	depends on MMU

	default y

	help

	  Earlier version initialized the MMU in the exception vector
@@ -192,6 +221,7 @@ config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX 


config HIGHMEM

	bool "High Memory Support"

	depends on MMU

	help

	  Linux can use the full amount of RAM in the system by

	  default. However, the default MMUv2 setup only maps the
@@ -208,6 +238,32 @@ config HIGHMEM 


	  If unsure, say Y.



config FAST_SYSCALL_XTENSA

	bool "Enable fast atomic syscalls"

	default n

	help

	  fast_syscall_xtensa is a syscall that can make atomic operations

	  on UP kernel when processor has no s32c1i support.



	  This syscall is deprecated. It may have issues when called with

	  invalid arguments. It is provided only for backwards compatibility.

	  Only enable it if your userspace software requires it.



	  If unsure, say N.



config FAST_SYSCALL_SPILL_REGISTERS

	bool "Enable spill registers syscall"

	default n

	help

	  fast_syscall_spill_registers is a syscall that spills all active

	  register windows of a calling userspace task onto its stack.



	  This syscall is deprecated. It may have issues when called with

	  invalid arguments. It is provided only for backwards compatibility.

	  Only enable it if your userspace software requires it.



	  If unsure, say N.



endmenu



config XTENSA_CALIBRATE_CCOUNT
@@ -250,12 +306,14 @@ config XTENSA_PLATFORM_ISS 


config XTENSA_PLATFORM_XT2000

	bool "XT2000"

	select HAVE_IDE

	help

	  XT2000 is the name of Tensilica's feature-rich emulation platform.

	  This hardware is capable of running a full Linux distribution.



config XTENSA_PLATFORM_S6105

	bool "S6105"

	select HAVE_IDE

	select SERIAL_CONSOLE

	select NO_IOPORT_MAP

arch/xtensa/Makefile

+2 −5
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
# for more details.

#

# Copyright (C) 2001 - 2005  Tensilica Inc.

# Copyright (C) 2014 Cadence Design Systems Inc.

#

# This file is included by the global makefile so that you can add your own

# architecture-specific flags and dependencies. Remember to do have actions
@@ -13,11 +14,7 @@ 
# Core configuration.

# (Use VAR=<xtensa_config> to use another default compiler.)



variant-$(CONFIG_XTENSA_VARIANT_FSF)		:= fsf

variant-$(CONFIG_XTENSA_VARIANT_DC232B)		:= dc232b

variant-$(CONFIG_XTENSA_VARIANT_DC233C)		:= dc233c

variant-$(CONFIG_XTENSA_VARIANT_S6000)		:= s6000

variant-$(CONFIG_XTENSA_VARIANT_LINUX_CUSTOM)	:= custom

variant-y := $(patsubst "%",%,$(CONFIG_XTENSA_VARIANT_NAME))



VARIANT = $(variant-y)

export VARIANT

arch/xtensa/boot/dts/kc705.dts

+4 −1
Original line number Diff line number Diff line
@@ -4,8 +4,11 @@ 


/ {

	compatible = "cdns,xtensa-kc705";

	chosen {

		bootargs = "earlycon=uart8250,mmio32,0xfd050020,115200n8 console=ttyS0,115200n8 ip=dhcp root=/dev/nfs rw debug memmap=0x38000000";

	};

	memory@0 {

		device_type = "memory";

		reg = <0x00000000 0x08000000>;

		reg = <0x00000000 0x38000000>;

	};

};

arch/xtensa/configs/common_defconfig

+0 −1
Original line number Diff line number Diff line
@@ -66,7 +66,6 @@ CONFIG_XTENSA_ARCH_LINUX_BE=y 
CONFIG_MMU=y

# CONFIG_XTENSA_UNALIGNED_USER is not set

# CONFIG_PREEMPT is not set

# CONFIG_MATH_EMULATION is not set

# CONFIG_HIGHMEM is not set



#

arch/xtensa/configs/iss_defconfig

+1 −2
Original line number Diff line number Diff line
@@ -146,7 +146,6 @@ CONFIG_XTENSA_VARIANT_FSF=y 
# CONFIG_XTENSA_VARIANT_S6000 is not set

# CONFIG_XTENSA_UNALIGNED_USER is not set

# CONFIG_PREEMPT is not set

# CONFIG_MATH_EMULATION is not set

CONFIG_XTENSA_CALIBRATE_CCOUNT=y

CONFIG_SERIAL_CONSOLE=y

CONFIG_XTENSA_ISS_NETWORK=y
@@ -308,7 +307,7 @@ CONFIG_MISC_DEVICES=y 
# EEPROM support

#

# CONFIG_EEPROM_93CX6 is not set

CONFIG_HAVE_IDE=y

# CONFIG_HAVE_IDE is not set

# CONFIG_IDE is not set



#