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5ecb2da660
linux/arch/s390/include/asm
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Sven Schnelle 5ecb2da660 s390: support command lines longer than 896 bytes 
Currently s390 supports a fixed maximum command line length of 896
bytes. This isn't enough as some installers are trying to pass all
configuration data via kernel command line, and even with zfcp alone
it is easy to generate really long command lines. Therefore extend
the command line to 4 kbytes.

In the parm area where the command line is stored there is no indication
of the maximum allowed length, so a new field which contains the maximum
length is added.

The parm area has always been initialized to zero, so with old kernels
this field would read zero. This is important because tools like zipl
could read this field. If it contains a number larger than zero zipl
knows the maximum length that can be stored in the parm area, otherwise
it must assume that it is booting a legacy kernel and only 896 bytes are
available.

The removing of trailing whitespace in head.S is also removed because
code to do this is already present in setup_boot_command_line().

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2021-10-26 15:21:31 +02:00
..
fpu s390: convert to generic entry 2021-01-19 12:29:26 +01:00
trace
vdso s390/vdso: use system call functions 2021-07-27 09:39:15 +02:00
airq.h s390/airq: use DMA memory for adapter interrupts 2019-06-15 12:25:05 +02:00
alternative-asm.h
alternative.h s390/alternatives: add alternative_input() / alternative_io() 2021-02-09 15:57:06 +01:00
ap.h s390/ap: get rid of register asm in ap_dqap() 2021-07-08 22:12:17 +02:00
appldata.h
archrandom.h s390/crypto: add arch_get_random_long() support 2020-12-10 21:02:08 +01:00
asm-const.h s390/kernel: unify EX_TABLE* implementations 2020-07-20 10:55:45 +02:00
asm-prototypes.h
atomic_ops.h s390/atomic,cmpxchg: make constraints work with old compilers 2021-04-15 17:47:42 +02:00
atomic.h locking/atomic: make ARCH_ATOMIC a Kconfig symbol 2021-05-26 13:20:49 +02:00
barrier.h s390/barrier: factor out bcr_serialize() 2021-10-11 20:55:58 +02:00
bitops.h s390/bitops: return true/false (not 1/0) from bool functions 2021-10-26 15:21:29 +02:00
boot_data.h
bug.h printk: Make linux/printk.h self-contained 2020-07-27 17:46:24 +09:00
bugs.h
cache.h treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
ccwdev.h s390/cio: remove duplicate struct ccw1 declaration 2021-04-05 11:30:57 +02:00
ccwgroup.h s390/qeth: fix deadlock during failing recovery 2021-09-21 20:02:24 -07:00
checksum.h s390/checksum: use register pair instead of register asm 2021-06-18 16:41:21 +02:00
chpid.h
chsc.h s390/cio: Add new Operation Code OC3 to PNSO 2020-09-15 13:21:46 -07:00
cio.h s390/cio: remove unused include linux/spinlock.h from cio.h 2021-07-27 09:39:13 +02:00
clocksource.h s390: convert to GENERIC_VDSO 2020-08-26 18:47:21 +02:00
clp.h s390/pci: Implement ioremap_wc/prot() with MIO 2020-09-14 10:30:07 +02:00
cmb.h
cmpxchg.h s390/cmpxchg: use register pair instead of register asm 2021-06-28 11:18:28 +02:00
compat.h arch: remove compat_alloc_user_space 2021-09-08 15:32:35 -07:00
cpacf.h s390/cpacf: get rid of register asm 2021-07-27 09:39:15 +02:00
cpcmd.h
cpu_mcf.h s390/cpum_cf: move array from header to C file 2021-09-07 13:38:41 +02:00
cpu_mf-insn.h
cpu_mf.h s390/cpum_sf: Replace function name in debug statements 2019-11-30 10:52:46 +01:00
cpu.h s390: add support for BEAR enhancement facility 2021-10-26 15:21:29 +02:00
cpufeature.h s390/hwcaps: shorten HWCAP defines 2021-07-27 09:39:20 +02:00
cputime.h s390: convert to generic entry 2021-01-19 12:29:26 +01:00
crw.h
css_chars.h s390/cio: Add new Operation Code OC3 to PNSO 2020-09-15 13:21:46 -07:00
ctl_reg.h s390/ctl_reg: add ctlreg5 and ctlreg15 unions 2021-07-27 09:39:17 +02:00
current.h
debug.h s390/debug: fix kernel-doc warnings 2021-10-11 20:55:58 +02:00
delay.h s390/delay: remove udelay_simple() 2020-12-16 14:55:49 +01:00
diag.h s390: rename dma section to amode31 2021-08-05 14:10:53 +02:00
dis.h
dma.h
dwarf.h
eadm.h s390/scm: Make struct scm_driver::remove return void 2021-07-21 11:53:42 +02:00
ebcdic.h
elf.h s390/hwcaps: make sie capability regular hwcap 2021-07-27 09:39:21 +02:00
entry-common.h s390/signal: remove sigreturn on stack 2021-07-08 22:12:17 +02:00
exec.h
extable.h s390: rename dma section to amode31 2021-08-05 14:10:53 +02:00
extmem.h
facility.h s390/facility: get rid of register asm 2021-06-18 16:41:23 +02:00
fcx.h
ftrace.h s390/ftrace: add HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALL support 2021-10-19 15:39:53 +02:00
ftrace.lds.h s390/ftrace: implement hotpatching 2021-08-03 14:31:40 +02:00
futex.h s390/mm: remove set_fs / rework address space handling 2020-11-23 12:01:12 +01:00
gmap.h s390: remove orphaned function declarations 2020-09-30 12:09:54 +02:00
hardirq.h softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig 2021-02-10 23:34:16 +01:00
hugetlb.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
hw_irq.h s390/irq: make init_ext_interrupts static 2020-03-11 14:18:44 +01:00
idals.h
idle.h s390/time,idle: get rid of unsigned long long 2021-03-08 10:46:27 +01:00
io.h mm: remove xlate_dev_kmem_ptr() 2021-05-07 00:26:34 -07:00
ipl.h s390/cio: remove unused include linux/spinlock.h from cio.h 2021-07-27 09:39:13 +02:00
irq_work.h s390/smp: implement arch_irq_work_raise() 2021-02-24 00:31:22 +01:00
irq.h
irqflags.h s390/irqflags: always inline arch irqflags functions 2021-06-18 16:41:19 +02:00
isc.h
itcw.h
jump_label.h s390/jump_label: make use of HAVE_JUMP_LABEL_BATCH 2021-10-11 20:55:58 +02:00
kasan.h s390: setup kernel memory layout early 2021-06-18 16:41:19 +02:00
Kbuild local64.h: make <asm/local64.h> mandatory 2020-12-29 15:36:49 -08:00
kdebug.h
kexec.h
kfence.h s390: add support for KFENCE 2021-07-30 17:09:02 +02:00
kprobes.h s390: support KPROBES_ON_FTRACE 2020-01-30 13:07:55 +01:00
kvm_host.h ARM: 2021-09-07 13:40:51 -07:00
kvm_para.h KVM: s390: generate kvm hypercall functions 2021-08-25 11:03:35 +02:00
linkage.h s390: rename dma section to amode31 2021-08-05 14:10:53 +02:00
livepatch.h s390/ftrace: add ftrace_instruction_pointer_set() helper function 2021-10-11 20:55:58 +02:00
lowcore.h s390: add support for BEAR enhancement facility 2021-10-26 15:21:29 +02:00
mem_detect.h s390/mem_detect: provide single get_mem_detect_end 2019-08-26 12:51:18 +02:00
mem_encrypt.h s390/mm: Remove sev_active() function 2019-08-09 22:52:11 +10:00
mmu_context.h s390/mm: ensure switch_mm() is executed with interrupts disabled 2021-06-07 17:06:59 +02:00
mmu.h s390 updates for the 5.7 merge window 2020-04-04 09:45:50 -07:00
mmzone.h
module.h s390/ftrace: implement hotpatching 2021-08-03 14:31:40 +02:00
nmi.h s390/mcck: keep machine check interruption codes sorted 2021-07-05 12:44:23 +02:00
nospec-branch.h s390: introduce nospec_uses_trampoline() 2021-10-26 15:21:29 +02:00
nospec-insn.h
numa.h s390/mm: remove fake numa support 2020-02-27 16:02:21 +01:00
os_info.h
page-states.h
page.h s390/mm: remove unused cmma functions 2021-08-18 10:01:28 +02:00
pci_clp.h s390/pci: Implement ioremap_wc/prot() with MIO 2020-09-14 10:30:07 +02:00
pci_debug.h
pci_dma.h s390/pci: improve DMA translation init and exit 2021-08-25 11:03:34 +02:00
pci_insn.h s390: fix setting of mio addressing control 2019-07-11 20:40:02 +02:00
pci_io.h s390/pci: Fix s390_mmio_read/write with MIO 2020-05-14 23:21:37 +02:00
pci.h s390/pci: fix zpci_zdev_put() on reserve 2021-10-04 09:49:10 +02:00
percpu.h s390/cmpxchg: use register pair instead of register asm 2021-06-28 11:18:28 +02:00
perf_event.h s390: implement perf_arch_fetch_caller_regs 2019-11-30 10:52:44 +01:00
pgalloc.h mm/thp: define default pmd_pgtable() 2021-07-01 11:06:03 -07:00
pgtable.h s390/pgtable: use physical address for Page-Table Origin 2021-10-26 15:21:27 +02:00
pkey.h s390/pkey: pkey cleanup: narrow in-kernel API, fix some variable types 2019-08-21 12:58:53 +02:00
pnet.h
preempt.h s390: preempt: Fix preempt_count initialization 2021-07-08 22:12:18 +02:00
processor.h s390/smp: enable DAT before CPU restart callback is called 2021-08-26 20:22:12 +02:00
ptdump.h s390: add ARCH_HAS_DEBUG_WX support 2020-09-14 11:38:35 +02:00
ptrace.h s390/ptrace: add last_break member to pt_regs 2021-10-26 15:21:28 +02:00
purgatory.h
qdio.h s390/qdio: remove unused support for SLIB parameters 2021-08-18 10:01:28 +02:00
runtime_instr.h
schid.h
sclp.h s390/sclp: sort out physical vs virtual pointers usage 2021-10-26 15:21:28 +02:00
scsw.h s390: Simplify the calculation of variables 2021-02-09 15:57:04 +01:00
seccomp.h s390: Enable seccomp architecture tracking 2020-11-20 11:16:35 -08:00
sections.h s390: rename dma section to amode31 2021-08-05 14:10:53 +02:00
serial.h
set_memory.h s390/mm: implement set_memory_4k() 2021-07-30 17:09:01 +02:00
setup.h s390: support command lines longer than 896 bytes 2021-10-26 15:21:31 +02:00
shmparam.h
signal.h
sigp.h s390/sigp: use register pair instead of register asm 2021-06-18 16:41:22 +02:00
smp.h s390/topology: fix topology information when calling cpu hotplug notifiers 2021-09-07 13:38:41 +02:00
softirq_stack.h s390/softirq: use call_on_stack() macro 2021-07-08 22:12:18 +02:00
sparsemem.h
spinlock_types.h s390/spinlock: remove align attribute from arch_spinlock_t 2021-03-28 20:23:54 +02:00
spinlock.h s390/spinlock: use R constraint in inline assembly 2021-04-12 12:46:43 +02:00
stacktrace.h s390/unwind: use current_frame_address() to unwind current task 2021-09-07 13:38:27 +02:00
stp.h s390/stp: add support for leap seconds 2020-09-26 15:51:21 +02:00
string.h s390/string: use generic strlcpy 2021-10-26 15:21:30 +02:00
switch_to.h
syscall_wrapper.h s390: pass struct pt_regs instead of registers to syscalls 2021-01-19 12:29:27 +01:00
syscall.h s390/syscall: provide generic system call functions 2021-07-27 09:39:15 +02:00
sysinfo.h
termios.h
text-patching.h s390: introduce text_poke_sync() 2021-10-11 20:55:58 +02:00
thread_info.h s390/thread_info.h: fix task_struct declaration warning 2021-02-09 15:57:04 +01:00
timex.h s390/timex: get rid of register asm 2021-06-28 11:18:28 +02:00
tlb.h s390/tlb: make cleared_pXs flags consistent with generic code 2021-01-19 12:29:25 +01:00
tlbflush.h s390: remove orphaned function declarations 2020-09-30 12:09:54 +02:00
topology.h s390/numa: set node distance to LOCAL_DISTANCE 2020-08-11 18:16:35 +02:00
tpi.h s390: add struct tpi_info to struct pt_regs 2021-06-07 17:07:01 +02:00
types.h s390: introduce register pair union 2021-06-18 16:41:21 +02:00
uaccess.h arch: remove compat_alloc_user_space 2021-09-08 15:32:35 -07:00
unistd.h s390: wire up clone3 system call 2019-07-23 10:45:53 +02:00
unwind.h s390/unwind: use current_frame_address() to unwind current task 2021-09-07 13:38:27 +02:00
uprobes.h
user.h
uv.h s390/boot: move uv function declarations to boot/uv.h 2021-07-27 09:39:14 +02:00
vdso.h s390/vdso: add minimal compat vdso 2021-07-08 15:37:28 +02:00
vga.h
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
vmlinux.lds.h
vtime.h s390: convert to generic entry 2021-01-19 12:29:26 +01:00
vtimer.h s390: remove orphaned function declarations 2020-09-30 12:09:54 +02:00
vx-insn.h
xor.h