Commit 07021b43 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux 

Pull powerpc updates from Michael Ellerman:
 "Highlights:
   - Major rework of Book3S 64-bit exception vectors (Nicholas Piggin)
   - Use gas sections for arranging exception vectors et. al.
   - Large set of TM cleanups and selftests (Cyril Bur)
   - Enable transactional memory (TM) lazily for userspace (Cyril Bur)
   - Support for XZ compression in the zImage wrapper (Oliver
     O'Halloran)
   - Add support for bpf constant blinding (Naveen N. Rao)
   - Beginnings of upstream support for PA Semi Nemo motherboards
     (Darren Stevens)

  Fixes:
   - Ensure .mem(init|exit).text are within _stext/_etext (Michael
     Ellerman)
   - xmon: Don't use ld on 32-bit (Michael Ellerman)
   - vdso64: Use double word compare on pointers (Anton Blanchard)
   - powerpc/nvram: Fix an incorrect partition merge (Pan Xinhui)
   - powerpc: Fix usage of _PAGE_RO in hugepage (Christophe Leroy)
   - powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K
     (Aneesh Kumar K.V)
   - Fix memory leak in queue_hotplug_event() error path (Andrew
     Donnellan)
   - Replay hypervisor maintenance interrupt first (Nicholas Piggin)

  Various performance optimisations (Anton Blanchard):
   - Align hot loops of memset() and backwards_memcpy()
   - During context switch, check before setting mm_cpumask
   - Remove static branch prediction in atomic{, 64}_add_unless
   - Only disable HAVE_EFFICIENT_UNALIGNED_ACCESS on POWER7 little
     endian
   - Set default CPU type to POWER8 for little endian builds

  Cleanups & features:
   - Sparse fixes/cleanups (Daniel Axtens)
   - Preserve CFAR value on SLB miss caused by access to bogus address
     (Paul Mackerras)
   - Radix MMU fixups for POWER9 (Aneesh Kumar K.V)
   - Support for setting used_(vsr|vr|spe) in sigreturn path (for CRIU)
     (Simon Guo)
   - Optimise syscall entry for virtual, relocatable case (Nicholas
     Piggin)
   - Optimise MSR handling in exception handling (Nicholas Piggin)
   - Support for kexec with Radix MMU (Benjamin Herrenschmidt)
   - powernv EEH fixes (Russell Currey)
   - Suprise PCI hotplug support for powernv (Gavin Shan)
   - Endian/sparse fixes for powernv PCI (Gavin Shan)
   - Defconfig updates (Anton Blanchard)
   - KVM: PPC: Book3S HV: Migrate pinned pages out of CMA (Balbir Singh)
   - cxl: Flush PSL cache before resetting the adapter (Frederic Barrat)
   - cxl: replace loop with for_each_child_of_node(), remove unneeded
     of_node_put() (Andrew Donnellan)
   - Fix HV facility unavailable to use correct handler (Nicholas
     Piggin)
   - Remove unnecessary syscall trampoline (Nicholas Piggin)
   - fadump: Fix build break when CONFIG_PROC_VMCORE=n (Michael
     Ellerman)
   - Quieten EEH message when no adapters are found (Anton Blanchard)
   - powernv: Add PHB register dump debugfs handle (Russell Currey)
   - Use kprobe blacklist for exception handlers & asm functions
     (Nicholas Piggin)
   - Document the syscall ABI (Nicholas Piggin)
   - MAINTAINERS: Update cxl maintainers (Michael Neuling)
   - powerpc: Remove all usages of NO_IRQ (Michael Ellerman)

  Minor cleanups:
   - Andrew Donnellan, Christophe Leroy, Colin Ian King, Cyril Bur,
     Frederic Barrat, Pan Xinhui, PrasannaKumar Muralidharan, Rui Teng,
     Simon Guo"

* tag 'powerpc-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (156 commits)
  powerpc/bpf: Add support for bpf constant blinding
  powerpc/bpf: Implement support for tail calls
  powerpc/bpf: Introduce accessors for using the tmp local stack space
  powerpc/fadump: Fix build break when CONFIG_PROC_VMCORE=n
  powerpc: tm: Enable transactional memory (TM) lazily for userspace
  powerpc/tm: Add TM Unavailable Exception
  powerpc: Remove do_load_up_transact_{fpu,altivec}
  powerpc: tm: Rename transct_(*) to ck(\1)_state
  powerpc: tm: Always use fp_state and vr_state to store live registers
  selftests/powerpc: Add checks for transactional VSXs in signal contexts
  selftests/powerpc: Add checks for transactional VMXs in signal contexts
  selftests/powerpc: Add checks for transactional FPUs in signal contexts
  selftests/powerpc: Add checks for transactional GPRs in signal contexts
  selftests/powerpc: Check that signals always get delivered
  selftests/powerpc: Add TM tcheck helpers in C
  selftests/powerpc: Allow tests to extend their kill timeout
  selftests/powerpc: Introduce GPR asm helper header file
  selftests/powerpc: Move VMX stack frame macros to header file
  selftests/powerpc: Rework FPU stack placement macros and move to header file
  selftests/powerpc: Check for VSX preservation across userspace preemption
  ...
parents d1f53233 b7b7013c

Documentation/powerpc/syscall64-abi.txt

0 → 100644
+105 −0
Original line number Diff line number Diff line 
===============================================

Power Architecture 64-bit Linux system call ABI

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



syscall

=======



syscall calling sequence[*] matches the Power Architecture 64-bit ELF ABI

specification C function calling sequence, including register preservation

rules, with the following differences.



[*] Some syscalls (typically low-level management functions) may have

    different calling sequences (e.g., rt_sigreturn).



Parameters and return value

---------------------------

The system call number is specified in r0.



There is a maximum of 6 integer parameters to a syscall, passed in r3-r8.



Both a return value and a return error code are returned. cr0.SO is the return

error code, and r3 is the return value or error code. When cr0.SO is clear,

the syscall succeeded and r3 is the return value. When cr0.SO is set, the

syscall failed and r3 is the error code that generally corresponds to errno.



Stack

-----

System calls do not modify the caller's stack frame. For example, the caller's

stack frame LR and CR save fields are not used.



Register preservation rules

---------------------------

Register preservation rules match the ELF ABI calling sequence with the

following differences:



r0:         Volatile.   (System call number.)

r3:         Volatile.   (Parameter 1, and return value.)

r4-r8:      Volatile.   (Parameters 2-6.)

cr0:        Volatile    (cr0.SO is the return error condition)

cr1, cr5-7: Nonvolatile.

lr:         Nonvolatile.



All floating point and vector data registers as well as control and status

registers are nonvolatile.



Invocation

----------

The syscall is performed with the sc instruction, and returns with execution

continuing at the instruction following the sc instruction.



Transactional Memory

--------------------

Syscall behavior can change if the processor is in transactional or suspended

transaction state, and the syscall can affect the behavior of the transaction.



If the processor is in suspended state when a syscall is made, the syscall

will be performed as normal, and will return as normal. The syscall will be

performed in suspended state, so its side effects will be persistent according

to the usual transactional memory semantics. A syscall may or may not result

in the transaction being doomed by hardware.



If the processor is in transactional state when a syscall is made, then the

behavior depends on the presence of PPC_FEATURE2_HTM_NOSC in the AT_HWCAP2 ELF

auxiliary vector.



- If present, which is the case for newer kernels, then the syscall will not

  be performed and the transaction will be doomed by the kernel with the

  failure code TM_CAUSE_SYSCALL | TM_CAUSE_PERSISTENT in the TEXASR SPR.



- If not present (older kernels), then the kernel will suspend the

  transactional state and the syscall will proceed as in the case of a

  suspended state syscall, and will resume the transactional state before

  returning to the caller. This case is not well defined or supported, so this

  behavior should not be relied upon.





vsyscall

========



vsyscall calling sequence matches the syscall calling sequence, with the

following differences. Some vsyscalls may have different calling sequences.



Parameters and return value

---------------------------

r0 is not used as an input. The vsyscall is selected by its address.



Stack

-----

The vsyscall may or may not use the caller's stack frame save areas.



Register preservation rules

---------------------------

r0: Volatile.

cr1, cr5-7: Volatile.

lr: Volatile.



Invocation

----------

The vsyscall is performed with a branch-with-link instruction to the vsyscall

function address.



Transactional Memory

--------------------

vsyscalls will run in the same transactional state as the caller. A vsyscall

may or may not result in the transaction being doomed by hardware.

MAINTAINERS

+2 −2
Original line number Diff line number Diff line
@@ -3523,14 +3523,14 @@ F: drivers/net/ethernet/chelsio/cxgb4vf/ 


CXL (IBM Coherent Accelerator Processor Interface CAPI) DRIVER

M:	Ian Munsie <imunsie@au1.ibm.com>

M:	Michael Neuling <mikey@neuling.org>

M:	Frederic Barrat <fbarrat@linux.vnet.ibm.com>

L:	linuxppc-dev@lists.ozlabs.org

S:	Supported

F:	arch/powerpc/platforms/powernv/pci-cxl.c

F:	drivers/misc/cxl/

F:	include/misc/cxl*

F:	include/uapi/misc/cxl.h

F:	Documentation/powerpc/cxl.txt

F:	Documentation/powerpc/cxl.txt

F:	Documentation/ABI/testing/sysfs-class-cxl



CXLFLASH (IBM Coherent Accelerator Processor Interface CAPI Flash) SCSI DRIVER

arch/powerpc/Kconfig

+3 −7
Original line number Diff line number Diff line
@@ -12,11 +12,6 @@ config 64BIT 
	bool

	default y if PPC64



config WORD_SIZE

	int

	default 64 if PPC64

	default 32 if !PPC64



config ARCH_PHYS_ADDR_T_64BIT

       def_bool PPC64 || PHYS_64BIT
@@ -101,7 +96,7 @@ config PPC 
	select VIRT_TO_BUS if !PPC64

	select HAVE_IDE

	select HAVE_IOREMAP_PROT

	select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_LITTLE_ENDIAN

	select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)

	select HAVE_KPROBES

	select HAVE_ARCH_KGDB

	select HAVE_KRETPROBES
@@ -167,6 +162,7 @@ config PPC 
	select GENERIC_CPU_AUTOPROBE

	select HAVE_VIRT_CPU_ACCOUNTING

	select HAVE_ARCH_HARDENED_USERCOPY

	select HAVE_KERNEL_GZIP



config GENERIC_CSUM

	def_bool CPU_LITTLE_ENDIAN
@@ -637,7 +633,7 @@ config FORCE_MAX_ZONEORDER 
	int "Maximum zone order"

	range 8 9 if PPC64 && PPC_64K_PAGES

	default "9" if PPC64 && PPC_64K_PAGES

	range 9 13 if PPC64 && !PPC_64K_PAGES

	range 13 13 if PPC64 && !PPC_64K_PAGES

	default "13" if PPC64 && !PPC_64K_PAGES

	range 9 64 if PPC32 && PPC_16K_PAGES

	default "9" if PPC32 && PPC_16K_PAGES

arch/powerpc/Makefile

+18 −25
Original line number Diff line number Diff line
@@ -43,31 +43,24 @@ NM := $(NM) --synthetic 
endif

endif



ifeq ($(CONFIG_PPC64),y)

ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)

OLDARCH	:= ppc64le

else

OLDARCH	:= ppc64

endif

else

ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)

OLDARCH	:= ppcle

else

OLDARCH	:= ppc

endif

endif

# BITS is used as extension for files which are available in a 32 bit

# and a 64 bit version to simplify shared Makefiles.

# e.g.: obj-y += foo_$(BITS).o

export BITS



# It seems there are times we use this Makefile without

# including the config file, but this replicates the old behaviour

ifeq ($(CONFIG_WORD_SIZE),)

CONFIG_WORD_SIZE := 32

ifdef CONFIG_PPC64

        BITS := 64

else

        BITS := 32

endif



UTS_MACHINE := $(OLDARCH)

machine-y = ppc

machine-$(CONFIG_PPC64) += 64

machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le

UTS_MACHINE := $(subst $(space),,$(machine-y))



ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)

override LD	+= -EL

override CROSS32AS += -mlittle-endian

LDEMULATION	:= lppc

GNUTARGET	:= powerpcle

MULTIPLEWORD	:= -mno-multiple
@@ -89,10 +82,10 @@ aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 
aflags-$(CONFIG_CPU_LITTLE_ENDIAN)	+= -mlittle-endian



ifeq ($(HAS_BIARCH),y)

override AS	+= -a$(CONFIG_WORD_SIZE)

override LD	+= -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)

override CC	+= -m$(CONFIG_WORD_SIZE)

override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)

override AS	+= -a$(BITS)

override LD	+= -m elf$(BITS)$(LDEMULATION)

override CC	+= -m$(BITS)

override AR	:= GNUTARGET=elf$(BITS)-$(GNUTARGET) $(AR)

endif



LDFLAGS_vmlinux-y := -Bstatic
@@ -179,7 +172,7 @@ KBUILD_CFLAGS += $(call cc-option,-msoft-float) 
KBUILD_CFLAGS	+= -pipe -Iarch/$(ARCH) $(CFLAGS-y)

CPP		= $(CC) -E $(KBUILD_CFLAGS)



CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__

CHECKFLAGS	+= -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__

ifdef CONFIG_CPU_BIG_ENDIAN

CHECKFLAGS	+= -D__BIG_ENDIAN__

else
@@ -234,7 +227,7 @@ KBUILD_CFLAGS += $(cpu-as-y) 
KBUILD_AFLAGS += $(aflags-y)

KBUILD_CFLAGS += $(cflags-y)



head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o

head-y				:= arch/powerpc/kernel/head_$(BITS).o

head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o

head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o

head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o

arch/powerpc/boot/Makefile

+55 −31
Original line number Diff line number Diff line
@@ -19,10 +19,15 @@ 


all: $(obj)/zImage



compress-$(CONFIG_KERNEL_GZIP) := CONFIG_KERNEL_GZIP

compress-$(CONFIG_KERNEL_XZ)   := CONFIG_KERNEL_XZ



BOOTCFLAGS    := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \

		 -fno-strict-aliasing -Os -msoft-float -pipe \

		 -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \

		 -isystem $(shell $(CROSS32CC) -print-file-name=include)

		 -isystem $(shell $(CROSS32CC) -print-file-name=include) \

		 -D$(compress-y)



ifdef CONFIG_PPC64_BOOT_WRAPPER

BOOTCFLAGS	+= -m64

endif
@@ -59,13 +64,30 @@ $(obj)/treeboot-currituck.o: BOOTCFLAGS += -mcpu=405 
$(obj)/treeboot-akebono.o: BOOTCFLAGS += -mcpu=405

$(obj)/virtex405-head.o: BOOTAFLAGS += -mcpu=405



# The pre-boot decompressors pull in a lot of kernel headers and other source

# files. This creates a bit of a dependency headache since we need to copy

# these files into the build dir, fix up any includes and ensure that dependent

# files are copied in the right order.



# these need to be seperate variables because they are copied out of different

# directories in the kernel tree. Sure you COULd merge them, but it's a

# cure-is-worse-than-disease situation.

zlib-decomp-$(CONFIG_KERNEL_GZIP) := decompress_inflate.c

zlib-$(CONFIG_KERNEL_GZIP) := inffast.c inflate.c inftrees.c

zlibheader-$(CONFIG_KERNEL_GZIP) := inffast.h inffixed.h inflate.h inftrees.h infutil.h

zliblinuxheader-$(CONFIG_KERNEL_GZIP) := zlib.h zconf.h zutil.h



zlib       := inffast.c inflate.c inftrees.c

zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h

zliblinuxheader := zlib.h zconf.h zutil.h

$(addprefix $(obj)/, decompress.o): \

	$(addprefix $(obj)/,$(zlib-decomp-y))



$(addprefix $(obj)/,$(zlib) cuboot-c2k.o gunzip_util.o main.o): \

	$(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))

$(addprefix $(obj)/, $(zlib-decomp-y)): \

	$(addprefix $(obj)/,$(zliblinuxheader-y)) \

	$(addprefix $(obj)/,$(zlibheader-y)) \

	$(addprefix $(obj)/,$(zlib-y))



$(addprefix $(obj)/,$(zlib-y)): \

	$(addprefix $(obj)/,$(zliblinuxheader-y)) \

	$(addprefix $(obj)/,$(zlibheader-y))



libfdt       := fdt.c fdt_ro.c fdt_wip.c fdt_sw.c fdt_rw.c fdt_strerror.c

libfdtheader := fdt.h libfdt.h libfdt_internal.h
@@ -73,10 +95,10 @@ libfdtheader := fdt.h libfdt.h libfdt_internal.h 
$(addprefix $(obj)/,$(libfdt) libfdt-wrapper.o simpleboot.o epapr.o opal.o): \

	$(addprefix $(obj)/,$(libfdtheader))



src-wlib-y := string.S crt0.S crtsavres.S stdio.c main.c \

src-wlib-y := string.S crt0.S crtsavres.S stdio.c decompress.c main.c \

		$(libfdt) libfdt-wrapper.c \

		ns16550.c serial.c simple_alloc.c div64.S util.S \

		gunzip_util.c elf_util.c $(zlib) devtree.c stdlib.c \

		elf_util.c $(zlib-y) devtree.c stdlib.c \

		oflib.c ofconsole.c cuboot.c mpsc.c cpm-serial.c \

		uartlite.c mpc52xx-psc.c opal.c opal-calls.S

src-wlib-$(CONFIG_40x) += 4xx.c planetcore.c
@@ -125,23 +147,20 @@ obj-wlib := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-wlib)))) 
obj-plat := $(addsuffix .o, $(basename $(addprefix $(obj)/, $(src-plat))))

obj-plat: $(libfdt)



quiet_cmd_copy_zlib = COPY    $@

      cmd_copy_zlib = sed "s@__used@@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@

quiet_cmd_copy_kern_src = COPY    $@

      cmd_copy_kern_src = sed -f $(srctree)/arch/powerpc/boot/fixup-headers.sed $< > $@



quiet_cmd_copy_zlibheader = COPY    $@

      cmd_copy_zlibheader = sed "s@<linux/\([^>]*\).*@\"\1\"@" $< > $@

# stddef.h for NULL

quiet_cmd_copy_zliblinuxheader = COPY    $@

      cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]*\).*@\"\1\"@" $< > $@

$(addprefix $(obj)/,$(zlib-y)): $(obj)/%: $(srctree)/lib/zlib_inflate/%

	$(call cmd,copy_kern_src)



$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%

	$(call cmd,copy_zlib)

$(addprefix $(obj)/,$(zlibheader-y)): $(obj)/%: $(srctree)/lib/zlib_inflate/%

	$(call cmd,copy_kern_src)



$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%

	$(call cmd,copy_zlibheader)

$(addprefix $(obj)/,$(zliblinuxheader-y)): $(obj)/%: $(srctree)/include/linux/%

	$(call cmd,copy_kern_src)



$(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%

	$(call cmd,copy_zliblinuxheader)

$(addprefix $(obj)/,$(zlib-decomp-y)): $(obj)/%: $(srctree)/lib/%

	$(call cmd,copy_kern_src)



quiet_cmd_copy_libfdt = COPY    $@

      cmd_copy_libfdt = cp $< $@
@@ -150,17 +169,17 @@ $(addprefix $(obj)/,$(libfdt) $(libfdtheader)): $(obj)/%: $(srctree)/scripts/dtc 
	$(call cmd,copy_libfdt)



$(obj)/empty.c:

	@touch $@

	$(Q)touch $@



$(obj)/zImage.lds: $(obj)/%: $(srctree)/$(src)/%.S

	$(CROSS32CC) $(cpp_flags) -E -Wp,-MD,$(depfile) -P -Upowerpc \

		-D__ASSEMBLY__ -DLINKER_SCRIPT -o $@ $<



$(obj)/zImage.coff.lds $(obj)/zImage.ps3.lds : $(obj)/%: $(srctree)/$(src)/%.S

	@cp $< $@

	$(Q)cp $< $@



clean-files := $(zlib) $(zlibheader) $(zliblinuxheader) \

		$(libfdt) $(libfdtheader) \

clean-files := $(zlib-) $(zlibheader-) $(zliblinuxheader-) \

		$(zlib-decomp-) $(libfdt) $(libfdtheader) \

		empty.c zImage.coff.lds zImage.ps3.lds zImage.lds



quiet_cmd_bootcc = BOOTCC  $@
@@ -207,10 +226,14 @@ CROSSWRAP := -C "$(CROSS_COMPILE)" 
endif

endif



compressor-$(CONFIG_KERNEL_GZIP) := gz

compressor-$(CONFIG_KERNEL_XZ)   := xz



# args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd

quiet_cmd_wrap	= WRAP    $@

      cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -c -o $@ -p $2 $(CROSSWRAP) \

		$(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) vmlinux

      cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -Z $(compressor-y) -c -o $@ -p $2 \

		$(CROSSWRAP) $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) \

		vmlinux



image-$(CONFIG_PPC_PSERIES)		+= zImage.pseries

image-$(CONFIG_PPC_POWERNV)		+= zImage.pseries
@@ -391,9 +414,9 @@ image-y := vmlinux.strip 
endif



$(obj)/zImage:		$(addprefix $(obj)/, $(image-y))

	@rm -f $@; ln $< $@

	$(Q)rm -f $@; ln $< $@

$(obj)/zImage.initrd:	$(addprefix $(obj)/, $(initrd-y))

	@rm -f $@; ln $< $@

	$(Q)rm -f $@; ln $< $@



# Only install the vmlinux

install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
@@ -410,8 +433,9 @@ clean-files += $(image-) $(initrd-) cuImage.* dtbImage.* treeImage.* \ 
	zImage.maple simpleImage.* otheros.bld *.dtb



# clean up files cached by wrapper

clean-kernel := vmlinux.strip vmlinux.bin

clean-kernel += $(addsuffix .gz,$(clean-kernel))

clean-kernel-base := vmlinux.strip vmlinux.bin

clean-kernel := $(addsuffix .gz,$(clean-kernel-base))

clean-kernel += $(addsuffix .xz,$(clean-kernel-base))

# If not absolute clean-files are relative to $(obj).

clean-files += $(addprefix $(objtree)/, $(clean-kernel))

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