6137fed082
For the architectures that do not implement their own tlb_flush() but
do already use the generic mmu_gather, there are two options:
1) the platform has an efficient flush_tlb_range() and
asm-generic/tlb.h doesn't need any overrides at all.
2) the platform lacks an efficient flush_tlb_range() and
we select MMU_GATHER_NO_RANGE to minimize full invalidates.
Convert all 'simple' architectures to one of these two forms.
alpha: has no range invalidate -> 2
arc: already used flush_tlb_range() -> 1
c6x: has no range invalidate -> 2
hexagon: has an efficient flush_tlb_range() -> 1
(flush_tlb_mm() is in fact a full range invalidate,
so no need to shoot down everything)
m68k: has inefficient flush_tlb_range() -> 2
microblaze: has no flush_tlb_range() -> 2
mips: has efficient flush_tlb_range() -> 1
(even though it currently seems to use flush_tlb_mm())
nds32: already uses flush_tlb_range() -> 1
nios2: has inefficient flush_tlb_range() -> 2
(no limit on range iteration)
openrisc: has inefficient flush_tlb_range() -> 2
(no limit on range iteration)
parisc: already uses flush_tlb_range() -> 1
sparc32: already uses flush_tlb_range() -> 1
unicore32: has inefficient flush_tlb_range() -> 2
(no limit on range iteration)
xtensa: has efficient flush_tlb_range() -> 1
Note this also fixes a bug in the existing code for a number
platforms. Those platforms that did:
tlb_end_vma() -> if (!full_mm) flush_tlb_*()
tlb_flush -> if (full_mm) flush_tlb_mm()
missed the case of shift_arg_pages(), which doesn't have @fullmm set,
nor calls into tlb_*vma(), but still frees page-tables and thus needs
an invalidate. The new code handles this by detecting a non-empty
range, and either issuing the matching range invalidate or a full
invalidate, depending on the capabilities.
No change in behavior intended.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Nick Piggin <npiggin@gmail.com>
Cc: Paul Burton <paul.burton@mips.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
207 lines
3.7 KiB
Plaintext
207 lines
3.7 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
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config UNICORE32
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def_bool y
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select ARCH_32BIT_OFF_T
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select ARCH_HAS_DEVMEM_IS_ALLOWED
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select ARCH_MIGHT_HAVE_PC_PARPORT
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select ARCH_MIGHT_HAVE_PC_SERIO
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_BZIP2
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select GENERIC_ATOMIC64
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select HAVE_KERNEL_LZO
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select HAVE_KERNEL_LZMA
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select HAVE_PCI
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select VIRT_TO_BUS
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select ARCH_HAVE_CUSTOM_GPIO_H
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select GENERIC_FIND_FIRST_BIT
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select GENERIC_IRQ_PROBE
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select GENERIC_IRQ_SHOW
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select ARCH_WANT_FRAME_POINTERS
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select GENERIC_IOMAP
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select MODULES_USE_ELF_REL
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select NEED_DMA_MAP_STATE
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select MMU_GATHER_NO_RANGE if MMU
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help
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UniCore-32 is 32-bit Instruction Set Architecture,
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including a series of low-power-consumption RISC chip
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designs licensed by PKUnity Ltd.
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Please see web page at <http://www.pkunity.com/>.
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config GENERIC_CSUM
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def_bool y
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config NO_IOPORT_MAP
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bool
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config STACKTRACE_SUPPORT
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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config RWSEM_GENERIC_SPINLOCK
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def_bool y
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config ARCH_HAS_ILOG2_U32
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bool
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config ARCH_HAS_ILOG2_U64
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bool
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config GENERIC_HWEIGHT
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def_bool y
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config ARCH_MAY_HAVE_PC_FDC
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bool
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config ZONE_DMA
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def_bool y
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menu "System Type"
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config MMU
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def_bool y
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config ARCH_FPGA
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bool
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config ARCH_PUV3
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def_bool y
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select CPU_UCV2
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select GENERIC_CLOCKEVENTS
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select HAVE_CLK
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select GPIOLIB
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# CONFIGs for ARCH_PUV3
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if ARCH_PUV3
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choice
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prompt "Board Selection"
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default PUV3_DB0913
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config PUV3_FPGA_DLX200
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select ARCH_FPGA
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bool "FPGA board"
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config PUV3_DB0913
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bool "DEBUG board (0913)"
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config PUV3_NB0916
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bool "NetBook board (0916)"
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select PWM
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select PWM_PUV3
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config PUV3_SMW0919
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bool "Security Mini-Workstation board (0919)"
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endchoice
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config PUV3_PM
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def_bool y if !ARCH_FPGA
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endif
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source "arch/unicore32/mm/Kconfig"
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comment "Floating point support"
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config UNICORE_FPU_F64
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def_bool y if !ARCH_FPGA
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endmenu
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menu "Kernel Features"
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source "kernel/Kconfig.hz"
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config LEDS
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def_bool y
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depends on GPIOLIB
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config ALIGNMENT_TRAP
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def_bool y
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help
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Unicore processors can not fetch/store information which is not
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naturally aligned on the bus, i.e., a 4 byte fetch must start at an
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address divisible by 4. On 32-bit Unicore processors, these non-aligned
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fetch/store instructions will be emulated in software if you say
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here, which has a severe performance impact. This is necessary for
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correct operation of some network protocols. With an IP-only
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configuration it is safe to say N, otherwise say Y.
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endmenu
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menu "Boot options"
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config CMDLINE
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string "Default kernel command string"
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default ""
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config CMDLINE_FORCE
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bool "Always use the default kernel command string"
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depends on CMDLINE != ""
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help
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Always use the default kernel command string, even if the boot
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loader passes other arguments to the kernel.
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This is useful if you cannot or don't want to change the
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command-line options your boot loader passes to the kernel.
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If unsure, say N.
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endmenu
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menu "Power management options"
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source "kernel/power/Kconfig"
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source "drivers/cpufreq/Kconfig"
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config ARCH_SUSPEND_POSSIBLE
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def_bool y if !ARCH_FPGA
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config ARCH_HIBERNATION_POSSIBLE
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def_bool y if !ARCH_FPGA
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endmenu
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if ARCH_PUV3
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config PUV3_GPIO
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bool
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depends on !ARCH_FPGA
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select GPIO_SYSFS
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default y
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if PUV3_NB0916
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menu "PKUnity NetBook-0916 Features"
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config I2C_BATTERY_BQ27200
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tristate "I2C Battery BQ27200 Support"
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select I2C_PUV3
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select POWER_SUPPLY
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select BATTERY_BQ27XXX
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config I2C_EEPROM_AT24
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tristate "I2C EEPROMs AT24 support"
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select I2C_PUV3
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select EEPROM_AT24
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config LCD_BACKLIGHT
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tristate "LCD Backlight support"
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select BACKLIGHT_LCD_SUPPORT
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select BACKLIGHT_PWM
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endmenu
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endif
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endif
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