Merge tag 'loongarch-5.20' of...

=========== ==========================

Rd is the destination register operand, while Rj, Rk and Ra ("a" stands for

"additional") are the source register operands. I8/I12/I16/I21/I26 are

"additional") are the source register operands. I8/I12/I14/I16/I21/I26 are

immediate operands of respective width. The longer I21 and I26 are stored

in separate higher and lower parts in the instruction word, denoted by the "L"

and "H" suffixes.

=========== ==========================

Opcode是指令操作码，Rj和Rk是源操作数（寄存器），Rd是目标操作数（寄存器），Ra是

4R-type格式特有的附加操作数（寄存器）。I8/I12/I16/I21/I26分别是8位/12位/16位/

21位/26位的立即数。其中较长的21位和26位立即数在指令字中被分割为高位部分与低位

4R-type格式特有的附加操作数（寄存器）。I8/I12/I14/I16/I21/I26分别是8位/12位/14位/

16位/21位/26位的立即数。其中较长的21位和26位立即数在指令字中被分割为高位部分与低位

部分，所以你们在这里的格式描述中能够看到I21L/I21H和I26L/I26H这样带后缀的表述。

指令列表

config LOONGARCH

	bool

	default y

	select ACPI

	select ACPI_GENERIC_GSI if ACPI

	select ACPI_MCFG if ACPI

	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI

	select ARCH_BINFMT_ELF_STATE

	select ARCH_ENABLE_MEMORY_HOTPLUG

	select ARCH_MIGHT_HAVE_PC_PARPORT

	select ARCH_MIGHT_HAVE_PC_SERIO

	select ARCH_SPARSEMEM_ENABLE

	select ARCH_STACKWALK

	select ARCH_SUPPORTS_ACPI

	select ARCH_SUPPORTS_ATOMIC_RMW

	select ARCH_SUPPORTS_HUGETLBFS

	select ARCH_WANTS_NO_INSTR

	select BUILDTIME_TABLE_SORT

	select COMMON_CLK

	select EFI

	select GENERIC_CLOCKEVENTS

	select GENERIC_CMOS_UPDATE

	select GENERIC_CPU_AUTOPROBE

	select HAVE_IRQ_TIME_ACCOUNTING

	select HAVE_MOD_ARCH_SPECIFIC

	select HAVE_NMI

	select HAVE_PCI

	select HAVE_PERF_EVENTS

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RSEQ

	select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP

	select IRQ_FORCED_THREADING

	select IRQ_LOONGARCH_CPU

	select MMU_GATHER_MERGE_VMAS if MMU

	select MODULES_USE_ELF_RELA if MODULES

	select NEED_PER_CPU_EMBED_FIRST_CHUNK

	select NEED_PER_CPU_PAGE_FIRST_CHUNK

	select OF

	select OF_EARLY_FLATTREE

	select PCI

	select PCI_DOMAINS_GENERIC

	select PCI_ECAM if ACPI

	select PCI_LOONGSON

	select PCI_MSI_ARCH_FALLBACKS

	select PERF_USE_VMALLOC

	select RTC_LIB

	select SMP

	select SPARSE_IRQ

	select SYSCTL_EXCEPTION_TRACE

	select SWIOTLB

	select TRACE_IRQFLAGS_SUPPORT

	select USE_PERCPU_NUMA_NODE_ID

	select USER_STACKTRACE_SUPPORT

	select ZONE_DMA32

	select MMU_GATHER_MERGE_VMAS if MMU

config 32BIT

	bool

	bool

	default y

config STACKTRACE_SUPPORT

	bool

	default y

# MACH_LOONGSON32 and MACH_LOONGSON64 are delibrately carried over from the

# MIPS Loongson code, to preserve Loongson-specific code paths in drivers that

# are shared between architectures, and specifically expecting the symbols.

choice

	prompt "Choose kernel unwinder"

	default UNWINDER_PROLOGUE if KALLSYMS

	help

	  This determines which method will be used for unwinding kernel stack

	  traces for panics, oopses, bugs, warnings, perf, /proc/<pid>/stack,

	  lockdep, and more.

config UNWINDER_GUESS

	bool "Guess unwinder"

	help

	  This option enables the "guess" unwinder for unwinding kernel stack

	  traces.  It scans the stack and reports every kernel text address it

	  finds.  Some of the addresses it reports may be incorrect.

	  While this option often produces false positives, it can still be

	  useful in many cases.

config UNWINDER_PROLOGUE

	bool "Prologue unwinder"

	depends on KALLSYMS

	help

	  This option enables the "prologue" unwinder for unwinding kernel stack

	  traces.  It unwind the stack frame based on prologue code analyze.  Symbol

	  information is needed, at least the address and length of each function.

	  Some of the addresses it reports may be incorrect (but better than the

	  Guess unwinder).

endchoice

load-y		= 0x9000000000200000

bootvars-y	= VMLINUX_LOAD_ADDRESS=$(load-y)

drivers-$(CONFIG_PCI)		+= arch/loongarch/pci/

KBUILD_AFLAGS	+= $(cflags-y)

KBUILD_CFLAGS	+= $(cflags-y)

KBUILD_CPPFLAGS += -DVMLINUX_LOAD_ADDRESS=$(load-y)