74c16b2e2b
PARAVIRT config option and PV IPI is added for the guest side, function pv_ipi_init() is used to add IPI sending and IPI receiving hooks. This function firstly checks whether system runs in VM mode, and if kernel runs in VM mode, it will call function kvm_para_available() to detect the current hypervirsor type (now only KVM type detection is supported). The paravirt functions can work only if current hypervisor type is KVM, since there is only KVM supported on LoongArch now. PV IPI uses virtual IPI sender and virtual IPI receiver functions. With virtual IPI sender, IPI message is stored in memory rather than emulated HW. IPI multicast is also supported, and 128 vcpus can received IPIs at the same time like X86 KVM method. Hypercall method is used for IPI sending. With virtual IPI receiver, HW SWI0 is used rather than real IPI HW. Since VCPU has separate HW SWI0 like HW timer, there is no trap in IPI interrupt acknowledge. Since IPI message is stored in memory, there is no trap in getting IPI message. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
82 lines
2.3 KiB
Makefile
82 lines
2.3 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the Linux/LoongArch kernel.
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#
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OBJECT_FILES_NON_STANDARD_head.o := y
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extra-y := vmlinux.lds
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obj-y += head.o cpu-probe.o cacheinfo.o env.o setup.o entry.o genex.o \
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traps.o irq.o idle.o process.o dma.o mem.o io.o reset.o switch.o \
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elf.o syscall.o signal.o time.o topology.o inst.o ptrace.o vdso.o \
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alternative.o unwind.o
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obj-$(CONFIG_ACPI) += acpi.o
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obj-$(CONFIG_EFI) += efi.o
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obj-$(CONFIG_CPU_HAS_FPU) += fpu.o kfpu.o
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obj-$(CONFIG_CPU_HAS_LBT) += lbt.o
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obj-$(CONFIG_ARCH_STRICT_ALIGN) += unaligned.o
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CFLAGS_module.o += $(call cc-option,-Wno-override-init,)
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CFLAGS_syscall.o += $(call cc-option,-Wno-override-init,)
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CFLAGS_traps.o += $(call cc-option,-Wno-override-init,)
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CFLAGS_perf_event.o += $(call cc-option,-Wno-override-init,)
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ifdef CONFIG_FUNCTION_TRACER
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ifndef CONFIG_DYNAMIC_FTRACE
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obj-y += mcount.o ftrace.o
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CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
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else
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obj-y += mcount_dyn.o ftrace_dyn.o
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CFLAGS_REMOVE_ftrace_dyn.o = $(CC_FLAGS_FTRACE)
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endif
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CFLAGS_REMOVE_inst.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_time.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_perf_event.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_rethook.o = $(CC_FLAGS_FTRACE)
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CFLAGS_REMOVE_rethook_trampoline.o = $(CC_FLAGS_FTRACE)
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endif
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KASAN_SANITIZE_efi.o := n
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KASAN_SANITIZE_cpu-probe.o := n
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KASAN_SANITIZE_traps.o := n
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KASAN_SANITIZE_smp.o := n
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KASAN_SANITIZE_vdso.o := n
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obj-$(CONFIG_MODULES) += module.o module-sections.o
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obj-$(CONFIG_STACKTRACE) += stacktrace.o
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obj-$(CONFIG_PROC_FS) += proc.o
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obj-$(CONFIG_PARAVIRT) += paravirt.o
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obj-$(CONFIG_SMP) += smp.o
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obj-$(CONFIG_NUMA) += numa.o
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obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o
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obj-$(CONFIG_RELOCATABLE) += relocate.o
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obj-$(CONFIG_KEXEC_CORE) += machine_kexec.o relocate_kernel.o
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obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
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obj-$(CONFIG_UNWINDER_GUESS) += unwind_guess.o
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obj-$(CONFIG_UNWINDER_PROLOGUE) += unwind_prologue.o
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obj-$(CONFIG_UNWINDER_ORC) += unwind_orc.o
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obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_regs.o
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obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
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obj-$(CONFIG_KGDB) += kgdb.o
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obj-$(CONFIG_KPROBES) += kprobes.o
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obj-$(CONFIG_RETHOOK) += rethook.o rethook_trampoline.o
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obj-$(CONFIG_UPROBES) += uprobes.o
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obj-$(CONFIG_JUMP_LABEL) += jump_label.o
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CPPFLAGS_vmlinux.lds := $(KBUILD_CFLAGS)
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