21ee33d51b
commit a050ba1e74 upstream.
This does the simple pattern conversion of alpha, arc, csky, hexagon,
loongarch, nios2, sh, sparc32, and xtensa to the lock_mm_and_find_vma()
helper. They all have the regular fault handling pattern without odd
special cases.
The remaining architectures all have something that keeps us from a
straightforward conversion: ia64 and parisc have stacks that can grow
both up as well as down (and ia64 has special address region checks).
And m68k, microblaze, openrisc, sparc64, and um end up having extra
rules about only expanding the stack down a limited amount below the
user space stack pointer. That is something that x86 used to do too
(long long ago), and it probably could just be skipped, but it still
makes the conversion less than trivial.
Note that this conversion was done manually and with the exception of
alpha without any build testing, because I have a fairly limited cross-
building environment. The cases are all simple, and I went through the
changes several times, but...
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Samuel Mendoza-Jonas <samjonas@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
3.0 KiB
SPDX-License-Identifier: GPL-2.0
Hexagon configuration
comment "Linux Kernel Configuration for Hexagon"
config HEXAGON def_bool y select ARCH_32BIT_OFF_T select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_NO_PREEMPT select DMA_GLOBAL_POOL # Other pending projects/to-do items. # select HAVE_REGS_AND_STACK_ACCESS_API # select HAVE_HW_BREAKPOINT if PERF_EVENTS # select ARCH_HAS_CPU_IDLE_WAIT # select GPIOLIB # select HAVE_CLK # select GENERIC_PENDING_IRQ if SMP select GENERIC_ATOMIC64 select HAVE_PERF_EVENTS # GENERIC_ALLOCATOR is used by dma_alloc_coherent() select GENERIC_ALLOCATOR select GENERIC_IRQ_SHOW select HAVE_ARCH_KGDB select HAVE_ARCH_TRACEHOOK select NEED_SG_DMA_LENGTH select NO_IOPORT_MAP select GENERIC_IOMAP select GENERIC_SMP_IDLE_THREAD select STACKTRACE_SUPPORT select GENERIC_CLOCKEVENTS_BROADCAST select LOCK_MM_AND_FIND_VMA select MODULES_USE_ELF_RELA select GENERIC_CPU_DEVICES select ARCH_WANT_LD_ORPHAN_WARN select TRACE_IRQFLAGS_SUPPORT help Qualcomm Hexagon is a processor architecture designed for high performance and low power across a wide variety of applications.
config HEXAGON_PHYS_OFFSET def_bool y help Platforms that don't load the kernel at zero set this.
config FRAME_POINTER def_bool y
config LOCKDEP_SUPPORT def_bool y
config EARLY_PRINTK def_bool y
config MMU def_bool y
config GENERIC_CSUM def_bool y
Use the generic interrupt handling code in kernel/irq/:
config GENERIC_IRQ_PROBE def_bool y
config GENERIC_HWEIGHT def_bool y
config STACKTRACE_SUPPORT def_bool y select STACKTRACE
config GENERIC_BUG def_bool y depends on BUG
menu "Machine selection"
choice prompt "System type" default HEXAGON_COMET
config HEXAGON_COMET bool "Comet Board" help Support for the Comet platform.
endchoice
config HEXAGON_ARCH_VERSION int "Architecture version" default 2
config CMDLINE string "Default kernel command string" default "" help On some platforms, there is currently no way for the boot loader to pass arguments to the kernel. For these, you should supply some command-line options at build time by entering them here. At a minimum, you should specify the memory size and the root device (e.g., mem=64M root=/dev/nfs).
config SMP bool "Multi-Processing support" help Enables SMP support in the kernel. If unsure, say "Y"
config NR_CPUS int "Maximum number of CPUs" if SMP range 2 6 if SMP default "1" if !SMP default "6" if SMP help This allows you to specify the maximum number of CPUs which this kernel will support. The maximum supported value is 6 and the minimum value which makes sense is 2.
This is purely to save memory - each supported CPU adds
approximately eight kilobytes to the kernel image.
choice prompt "Kernel page size" default PAGE_SIZE_4KB help Changes the default page size; use with caution.
config PAGE_SIZE_4KB bool "4KB"
config PAGE_SIZE_16KB bool "16KB"
config PAGE_SIZE_64KB bool "64KB"
config PAGE_SIZE_256KB bool "256KB"
endchoice
source "kernel/Kconfig.hz"
endmenu