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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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411ed32257
s390 machines provide hardware support for creating Linux dumps on SCSI disks. For creating a dump a special purpose dump Linux is used. The first 32 MB of memory are saved by the hardware before the dump Linux is booted. Via an SCLP interface, the saved memory can be accessed from Linux. This patch exports memory and registers of the crashed Linux to userspace via a debugfs file. For more information refer to Documentation/s390/zfcpdump.txt, which is included in this patch. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
118 lines
3.3 KiB
Makefile
118 lines
3.3 KiB
Makefile
#
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# s390/Makefile
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#
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# This file is included by the global makefile so that you can add your own
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# architecture-specific flags and dependencies. Remember to do have actions
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# for "archclean" and "archdep" for cleaning up and making dependencies for
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# this architecture
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#
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# This file is subject to the terms and conditions of the GNU General Public
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# License. See the file "COPYING" in the main directory of this archive
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# for more details.
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#
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# Copyright (C) 1994 by Linus Torvalds
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#
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ifndef CONFIG_64BIT
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LDFLAGS := -m elf_s390
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CFLAGS += -m31
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AFLAGS += -m31
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UTS_MACHINE := s390
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STACK_SIZE := 8192
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CHECKFLAGS += -D__s390__
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else
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LDFLAGS := -m elf64_s390
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MODFLAGS += -fpic -D__PIC__
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CFLAGS += -m64
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AFLAGS += -m64
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UTS_MACHINE := s390x
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STACK_SIZE := 16384
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CHECKFLAGS += -D__s390__ -D__s390x__
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endif
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cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
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cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
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cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
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cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
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#KBUILD_IMAGE is necessary for make rpm
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KBUILD_IMAGE :=arch/s390/boot/image
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#
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# Prevent tail-call optimizations, to get clearer backtraces:
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#
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cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
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# old style option for packed stacks
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ifeq ($(call cc-option-yn,-mkernel-backchain),y)
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cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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ifdef CONFIG_SMALL_STACK
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STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
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endif
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endif
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# new style option for packed stacks
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ifeq ($(call cc-option-yn,-mpacked-stack),y)
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cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
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aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
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cflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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aflags-$(CONFIG_SMALL_STACK) += -D__SMALL_STACK
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ifdef CONFIG_SMALL_STACK
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STACK_SIZE := $(shell echo $$(($(STACK_SIZE)/2)) )
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endif
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endif
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ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
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ifneq ($(call cc-option-yn,-mstack-size=8192),y)
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cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
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endif
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endif
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ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
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cflags-$(CONFIG_WARN_STACK) += -mwarn-dynamicstack
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cflags-$(CONFIG_WARN_STACK) += -mwarn-framesize=$(CONFIG_WARN_STACK_SIZE)
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endif
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CFLAGS += -mbackchain -msoft-float $(cflags-y)
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CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
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AFLAGS += $(aflags-y)
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OBJCOPYFLAGS := -O binary
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LDFLAGS_vmlinux := -e start
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head-y := arch/s390/kernel/head.o arch/s390/kernel/init_task.o
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core-y += arch/s390/mm/ arch/s390/kernel/ arch/s390/crypto/ \
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arch/s390/appldata/ arch/s390/hypfs/
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libs-y += arch/s390/lib/
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drivers-y += drivers/s390/
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drivers-$(CONFIG_MATHEMU) += arch/s390/math-emu/
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# must be linked after kernel
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drivers-$(CONFIG_OPROFILE) += arch/s390/oprofile/
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boot := arch/s390/boot
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all: image
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install: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $@
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image: vmlinux
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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zfcpdump:
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$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
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archclean:
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$(Q)$(MAKE) $(clean)=$(boot)
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# Don't use tabs in echo arguments
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define archhelp
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echo '* image - Kernel image for IPL ($(boot)/image)'
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endef
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