mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 22:37:01 +07:00
7a8e7da422
This cleans up the module support that was commited earlier to work with what's actually emitted from our GCC port as it lands upstream. Most of the work here is adding new relocations to the kernel. There's some limitations on module loading imposed by the kernel: * The kernel doesn't support linker relaxation, which is necessary to support R_RISCV_ALIGN. In order to get reliable module building you're going to need to a GCC that supports the new '-mno-relax', which IIRC isn't going to be out until 8.1.0. It's somewhat unlikely that R_RISCV_ALIGN will appear in a module even without '-mno-relax' support, so issues shouldn't be common. * There is no large code model for RISC-V, which means modules must be loaded within a 32-bit signed offset of the kernel. We don't currently have any mechanism for ensuring this memory remains free or moving pages around, so issues here might be common. I fixed a singcle merge conflict in arch/riscv/kernel/Makefile.
326 lines
6.6 KiB
Plaintext
326 lines
6.6 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see Documentation/kbuild/kconfig-language.txt.
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#
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config RISCV
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def_bool y
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select OF
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select OF_EARLY_FLATTREE
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select OF_IRQ
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select ARCH_WANT_FRAME_POINTERS
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select CLONE_BACKWARDS
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select COMMON_CLK
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select GENERIC_CLOCKEVENTS
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select GENERIC_CPU_DEVICES
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select GENERIC_IRQ_SHOW
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select GENERIC_PCI_IOMAP
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select GENERIC_STRNCPY_FROM_USER
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select GENERIC_STRNLEN_USER
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select GENERIC_SMP_IDLE_THREAD
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select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A
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select HAVE_MEMBLOCK
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select HAVE_MEMBLOCK_NODE_MAP
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select HAVE_DMA_API_DEBUG
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select HAVE_DMA_CONTIGUOUS
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select HAVE_GENERIC_DMA_COHERENT
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select IRQ_DOMAIN
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select NO_BOOTMEM
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select RISCV_ISA_A if SMP
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select SPARSE_IRQ
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select SYSCTL_EXCEPTION_TRACE
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select HAVE_ARCH_TRACEHOOK
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select MODULES_USE_ELF_RELA if MODULES
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select THREAD_INFO_IN_TASK
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select RISCV_TIMER
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config MMU
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def_bool y
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# even on 32-bit, physical (and DMA) addresses are > 32-bits
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config ARCH_PHYS_ADDR_T_64BIT
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def_bool y
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config ZONE_DMA32
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bool
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default y
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config ARCH_DMA_ADDR_T_64BIT
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def_bool y
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config PAGE_OFFSET
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hex
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default 0xC0000000 if 32BIT && MAXPHYSMEM_2GB
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default 0xffffffff80000000 if 64BIT && MAXPHYSMEM_2GB
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default 0xffffffe000000000 if 64BIT && MAXPHYSMEM_128GB
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config STACKTRACE_SUPPORT
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def_bool y
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config TRACE_IRQFLAGS_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 GENERIC_BUG
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def_bool y
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depends on BUG
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select GENERIC_BUG_RELATIVE_POINTERS if 64BIT
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config GENERIC_BUG_RELATIVE_POINTERS
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bool
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config GENERIC_CSUM
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def_bool y
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config GENERIC_HWEIGHT
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def_bool y
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config PGTABLE_LEVELS
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int
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default 3 if 64BIT
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default 2
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config HAVE_KPROBES
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def_bool n
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config DMA_DIRECT_OPS
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def_bool y
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menu "Platform type"
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choice
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prompt "Base ISA"
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default ARCH_RV64I
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help
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This selects the base ISA that this kernel will traget and must match
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the target platform.
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config ARCH_RV32I
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bool "RV32I"
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select CPU_SUPPORTS_32BIT_KERNEL
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select 32BIT
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select GENERIC_ASHLDI3
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select GENERIC_ASHRDI3
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select GENERIC_LSHRDI3
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config ARCH_RV64I
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bool "RV64I"
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select CPU_SUPPORTS_64BIT_KERNEL
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select 64BIT
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select HAVE_FUNCTION_TRACER
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_DYNAMIC_FTRACE
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select HAVE_DYNAMIC_FTRACE_WITH_REGS
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endchoice
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# We must be able to map all physical memory into the kernel, but the compiler
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# is still a bit more efficient when generating code if it's setup in a manner
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# such that it can only map 2GiB of memory.
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choice
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prompt "Kernel Code Model"
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default CMODEL_MEDLOW if 32BIT
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default CMODEL_MEDANY if 64BIT
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config CMODEL_MEDLOW
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bool "medium low code model"
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config CMODEL_MEDANY
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bool "medium any code model"
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endchoice
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config MODULE_SECTIONS
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bool
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select HAVE_MOD_ARCH_SPECIFIC
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choice
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prompt "Maximum Physical Memory"
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default MAXPHYSMEM_2GB if 32BIT
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default MAXPHYSMEM_2GB if 64BIT && CMODEL_MEDLOW
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default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
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config MAXPHYSMEM_2GB
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bool "2GiB"
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config MAXPHYSMEM_128GB
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depends on 64BIT && CMODEL_MEDANY
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select MODULE_SECTIONS if MODULES
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bool "128GiB"
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endchoice
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config SMP
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bool "Symmetric Multi-Processing"
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help
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This enables support for systems with more than one CPU. If
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you say N here, the kernel will run on single and
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multiprocessor machines, but will use only one CPU of a
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multiprocessor machine. If you say Y here, the kernel will run
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on many, but not all, single processor machines. On a single
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processor machine, the kernel will run faster if you say N
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here.
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If you don't know what to do here, say N.
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config NR_CPUS
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int "Maximum number of CPUs (2-32)"
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range 2 32
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depends on SMP
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default "8"
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config CPU_SUPPORTS_32BIT_KERNEL
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bool
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config CPU_SUPPORTS_64BIT_KERNEL
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bool
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choice
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prompt "CPU Tuning"
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default TUNE_GENERIC
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config TUNE_GENERIC
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bool "generic"
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endchoice
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config RISCV_ISA_C
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bool "Emit compressed instructions when building Linux"
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default y
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help
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Adds "C" to the ISA subsets that the toolchain is allowed to emit
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when building Linux, which results in compressed instructions in the
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Linux binary.
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If you don't know what to do here, say Y.
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config RISCV_ISA_A
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def_bool y
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endmenu
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menu "Kernel type"
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choice
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prompt "Kernel code model"
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default 64BIT
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config 32BIT
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bool "32-bit kernel"
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depends on CPU_SUPPORTS_32BIT_KERNEL
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help
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Select this option to build a 32-bit kernel.
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config 64BIT
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bool "64-bit kernel"
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depends on CPU_SUPPORTS_64BIT_KERNEL
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help
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Select this option to build a 64-bit kernel.
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endchoice
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source "mm/Kconfig"
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source "kernel/Kconfig.preempt"
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source "kernel/Kconfig.hz"
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endmenu
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menu "Bus support"
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config PCI
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bool "PCI support"
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select PCI_MSI
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help
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This feature enables support for PCI bus system. If you say Y
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here, the kernel will include drivers and infrastructure code
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to support PCI bus devices.
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If you don't know what to do here, say Y.
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config PCI_DOMAINS
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def_bool PCI
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config PCI_DOMAINS_GENERIC
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def_bool PCI
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source "drivers/pci/Kconfig"
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endmenu
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source "init/Kconfig"
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source "kernel/Kconfig.freezer"
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menu "Executable file formats"
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source "fs/Kconfig.binfmt"
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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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endmenu
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source "net/Kconfig"
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source "drivers/Kconfig"
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source "fs/Kconfig"
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menu "Kernel hacking"
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config CMDLINE_BOOL
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bool "Built-in kernel command line"
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help
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For most platforms, it is firmware or second stage bootloader
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that by default specifies the kernel command line options.
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However, it might be necessary or advantageous to either override
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the default kernel command line or add a few extra options to it.
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For such cases, this option allows hardcoding command line options
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directly into the kernel.
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For that, choose 'Y' here and fill in the extra boot parameters
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in CONFIG_CMDLINE.
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The built-in options will be concatenated to the default command
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line if CMDLINE_OVERRIDE is set to 'N'. Otherwise, the default
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command line will be ignored and replaced by the built-in string.
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config CMDLINE
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string "Built-in kernel command string"
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depends on CMDLINE_BOOL
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default ""
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help
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Supply command-line options at build time by entering them here.
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config CMDLINE_OVERRIDE
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bool "Built-in command line overrides bootloader arguments"
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depends on CMDLINE_BOOL
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help
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Set this option to 'Y' to have the kernel ignore the bootloader
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or firmware command line. Instead, the built-in command line
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will be used exclusively.
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If you don't know what to do here, say N.
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config EARLY_PRINTK
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def_bool y
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source "lib/Kconfig.debug"
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config CMDLINE_BOOL
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bool
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endmenu
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source "security/Kconfig"
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source "crypto/Kconfig"
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source "lib/Kconfig"
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