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linux/arch/arm/include/asm
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Ard Biesheuvel 2a55280a36 efi/libstub: arm: Print CPU boot mode and MMU state at boot 
On 32-bit ARM, we may boot at HYP mode, or with the MMU and caches off
(or both), even though the EFI spec does not actually support this.
While booting at HYP mode is something we might tolerate, fiddling
with the caches is a more serious issue, as disabling the caches is
tricky to do safely from C code, and running without the Dcache makes
it impossible to support unaligned memory accesses, which is another
explicit requirement imposed by the EFI spec.

So take note of the CPU mode and MMU state in the EFI stub diagnostic
output so that we can easily diagnose any issues that may arise from
this. E.g.,

  EFI stub: Entering in SVC mode with MMU enabled

Also, capture the CPSR and SCTLR system register values at EFI stub
entry, and after ExitBootServices() returns, and check whether the
MMU and Dcache were disabled at any point. If this is the case, a
diagnostic message like the following will be emitted:

  efi: [Firmware Bug]: EFI stub was entered with MMU and Dcache disabled, please fix your firmware!
  efi: CPSR at EFI stub entry        : 0x600001d3
  efi: SCTLR at EFI stub entry       : 0x00c51838
  efi: CPSR after ExitBootServices() : 0x600001d3
  efi: SCTLR after ExitBootServices(): 0x00c50838

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>
2020-06-17 15:29:11 +02:00
..
hardware ARM: l2c: add definition for FWA in PL310 aux register 2019-10-17 16:36:10 +02:00
mach treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vdso arm: vdso: Enable arm to use common headers 2020-03-21 15:24:03 +01:00
xen xen: fixes and cleanups for 5.4-rc2 2019-10-04 11:13:09 -07:00
arch_gicv3.h arm: Remove GICv3 vgic compatibility macros 2020-03-24 10:56:05 +00:00
arch_timer.h clocksource/drivers/arm_arch_timer: Extract elf_hwcap use to arch-helper 2019-06-25 19:49:18 +02:00
arm-cci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm-offsets.h
assembler.h ARM updates for 5.8-rc1: 2020-06-01 15:36:32 -07:00
atomic.h Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-07-08 16:12:03 -07:00
auxvec.h
barrier.h ARM: avoid Cortex-A9 livelock on tight dmb loops 2019-02-01 22:05:50 +00:00
bitops.h ARM: 8785/1: use compiler built-ins for ffs and fls 2018-07-30 11:45:53 +01:00
bitrev.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bL_switcher.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bug.h arm/asm: add loglvl to c_backtrace() 2020-06-09 09:39:10 -07:00
bugs.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cache.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cacheflush.h arm: rename flush_cache_user_range to flush_icache_user_range 2020-06-08 11:05:58 -07:00
cachetype.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum.h arm: switch to csum_and_copy_from_user() 2020-05-29 16:11:49 -04:00
clocksource.h arm: Introduce asm/vdso/clocksource.h 2020-03-21 15:23:54 +01:00
cmpxchg.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
compiler.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cp15.h arm: vdso: Enable arm to use common headers 2020-03-21 15:24:03 +01:00
cpu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpufeature.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpuidle.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cputype.h Merge branches 'misc', 'sa1100-for-next' and 'spectre' into for-linus 2019-01-02 10:37:05 +00:00
cti.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dcc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
delay.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
device.h xen/arm: use dma-noncoherent.h calls for xen-swiotlb cache maintainance 2019-09-11 12:43:16 +02:00
div64.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-contiguous.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dma-direct.h dma-direct: unify the dma_capable definitions 2019-11-20 20:31:40 +01:00
dma-iommu.h ARM/dma-mapping: merge __dma_supported into arm_dma_supported 2020-03-20 11:43:21 +01:00
dma-mapping.h xen/arm: use dev_is_dma_coherent 2019-09-11 12:43:26 +02:00
dma.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dmi.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
domain.h ARM: 8908/1: add __always_inline to functions called from __get_user_check() 2019-10-10 22:23:19 +01:00
ecard.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
edac.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
efi.h efi/libstub: arm: Print CPU boot mode and MMU state at boot 2020-06-17 15:29:11 +02:00
elf.h Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-11-16 12:50:35 -08:00
entry-macro-multi.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
exception.h ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code 2017-12-17 22:14:21 +00:00
fb.h
fiq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
firmware.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
fixmap.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
floppy.h floppy: split the base port from the register in I/O accesses 2020-05-12 19:34:52 +03:00
fncpy.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
fpstate.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ftrace.h ARM: 8940/1: ftrace: remove mcount(),ftrace_caller_old() and ftrace_call_old() 2019-11-22 00:19:16 +00:00
futex.h ARM: futex: Address build warning 2020-05-07 00:41:47 +02:00
glue-cache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-df.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-pf.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue-proc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
glue.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
gpio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hardirq.h ARM: prevent tracing IPI_CPU_BACKTRACE 2019-05-14 19:52:48 -07:00
highmem.h kmap: consolidate kmap_prot definitions 2020-06-04 19:06:22 -07:00
hugetlb-3level.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
hugetlb.h mm/hugetlb: define a generic fallback for arch_clear_hugepage_flags() 2020-06-03 20:09:46 -07:00
hw_breakpoint.h ARM: 8927/1: ARM/hw_breakpoint: add more ARMv8 debug architecture versions support 2019-11-15 22:21:08 +00:00
hw_irq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hwcap.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hypervisor.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ide.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
idmap.h mm: introduce include/linux/pgtable.h 2020-06-09 09:39:13 -07:00
insn.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
io.h remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
irq_work.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irq.h ARM: 8824/1: fix a migrating irq bug when hotplug cpu 2019-02-01 21:54:49 +00:00
irqflags.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
jump_label.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kbuild asm-generic: make more kernel-space headers mandatory 2020-04-02 09:35:25 -07:00
kexec.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kgdb.h ARM: 8764/1: kgdb: fix NUMREGBYTES so that gdb_regs[] is the correct size 2018-05-19 11:53:46 +01:00
kmap_types.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
kprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
krait-l2-accessors.h ARM: Add Krait L2 register accessor functions 2018-10-17 13:14:33 -07:00
linkage.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mc146818rtc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mcpm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mcs_spinlock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memblock.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
memory.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mmu_context.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mmu.h Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-11-16 12:50:35 -08:00
module.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
mpu.h ARM: 8757/1: NOMMU: Support PMSAv8 MPU 2018-05-19 11:53:46 +01:00
mtd-xip.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
neon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
nwflash.h misc: move FLASH_MINOR into miscdevice.h and fix conflicts 2020-03-18 12:27:04 +01:00
opcodes-sec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
opcodes-virt.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 1 2019-05-21 11:28:39 +02:00
opcodes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
outercache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
page-nommu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
page.h mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS 2020-04-10 15:36:21 -07:00
paravirt.h x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
patch.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pci.h ARM: 8911/1: move pcibios_report_status to <asm/pci.h> 2019-10-27 21:14:40 +00:00
percpu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201 2019-05-30 11:29:52 -07:00
perf_event.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgalloc.h mm: remove quicklist page table caches 2019-09-24 15:54:09 -07:00
pgtable-2level-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgtable-2level-types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-2level.h mm: consolidate pte_index() and pte_offset_*() definitions 2020-06-09 09:39:14 -07:00
pgtable-3level-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-3level-types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
pgtable-3level.h mm: consolidate pte_index() and pte_offset_*() definitions 2020-06-09 09:39:14 -07:00
pgtable-hwdef.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pgtable-nommu.h mm: consolidate pte_index() and pte_offset_*() definitions 2020-06-09 09:39:14 -07:00
pgtable.h mm: consolidate pte_index() and pte_offset_*() definitions 2020-06-09 09:39:14 -07:00
probes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
proc-fns.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
processor.h arm: vdso: Enable arm to use common headers 2020-03-21 15:24:03 +01:00
procinfo.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
prom.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
psci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
ptdump.h arm: dump: no need to check return value of debugfs_create functions 2019-06-03 15:49:07 +02:00
ptrace.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sections.h arm: Remove HYP/Stage-2 page-table support 2020-03-24 10:56:05 +00:00
secure_cntvoff.h ARM: smp: Add initialization of CNTVOFF 2018-05-08 14:50:42 +02:00
set_memory.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
setup.h docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
shmparam.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
signal.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp_plat.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smp_scu.h ARM: SoC platform updates for 4.15 2017-11-16 14:05:12 -08:00
smp_twd.h ARM: 8822/1: smp_twd: Remove legacy TWD registration 2019-02-01 21:44:10 +00:00
smp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sparsemem.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock_types.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spinlock.h ARM: 8829/1: spinlock: use unified assembler language syntax 2019-02-01 21:44:15 +00:00
stackprotector.h ARM: smp: add support for per-task stack canaries 2018-12-12 13:20:07 -08:00
stacktrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
string.h ARM: 8745/1: get rid of __memzero() 2018-01-21 15:37:56 +00:00
suspend.h ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used 2019-02-26 11:32:54 +00:00
swab.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
switch_to.h sched/rt, ARM: Use CONFIG_PREEMPTION 2019-12-08 14:37:32 +01:00
sync_bitops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
syscall.h audit/stable-5.2 PR 20190507 2019-05-07 19:06:04 -07:00
system_info.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
system_misc.h KVM: arm/arm64: Add kvm_ras.h to collect kvm specific RAS plumbing 2019-02-07 23:10:45 +01:00
tcm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 194 2019-05-30 11:29:22 -07:00
therm.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
thread_info.h arm: Remove TIF_NOHZ 2020-02-14 16:05:33 +01:00
thread_notify.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
timex.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tlb.h asm-generic/tlb: provide MMU_GATHER_TABLE_FREE 2020-02-04 03:05:26 +00:00
tlbflush.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
tls.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
topology.h arm/topology: Populate arch_scale_thermal_pressure() for ARM platforms 2020-03-06 12:57:19 +01:00
traps.h arm/asm: add loglvl to c_backtrace() 2020-06-09 09:39:10 -07:00
uaccess-asm.h ARM: uaccess: fix DACR mismatch with nested exceptions 2020-05-03 17:30:27 +01:00
uaccess.h ARM: 8908/1: add __always_inline to functions called from __get_user_check() 2019-10-10 22:23:19 +01:00
ucontext.h Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm 2017-11-16 12:50:35 -08:00
unaligned.h ARM: 8715/1: add a private asm/unaligned.h 2017-10-24 10:33:23 +01:00
unified.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
unistd.h clone3-v5.3 2019-07-11 10:09:44 -07:00
unwind.h arm: add loglvl to unwind_backtrace() 2020-06-09 09:39:10 -07:00
uprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
user.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
v7m.h ARM: 8830/1: NOMMU: Toggle only bits in EXC_RETURN we are really care of 2019-02-01 21:44:19 +00:00
vdso_datapage.h ARM: 8930/1: Add support for generic vDSO 2019-11-15 22:21:12 +00:00
vdso.h ARM: 8748/1: mm: Define vdso_start, vdso_end as array 2018-03-24 14:27:49 +00:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vfp.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vfpmacros.h ARM: 8843/1: use unified assembler in headers 2019-02-26 11:26:06 +00:00
vga.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
virt.h arm: Remove the ability to set HYP vectors outside of the decompressor 2020-03-24 10:56:05 +00:00
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
word-at-a-time.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xor.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00