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linux/arch/arm64/kernel
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Vincenzo Frascino af1b3cf2c2 arm64: compat: Add KUSER_HELPERS config option 
When kuser helpers are enabled the kernel maps the relative code at
a fixed address (0xffff0000). Making configurable the option to disable
them means that the kernel can remove this mapping and any access to
this memory area results in a sigfault.

Add a KUSER_HELPERS config option that can be used to disable the
mapping when it is turned off.

This option can be turned off if and only if the applications are
designed specifically for the platform and they do not make use of the
kuser helpers code.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
[will: Use IS_ENABLED() instead of #ifdef]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2019-04-23 18:01:58 +01:00
..
probes
arm64: probes: Move magic BRK values into brk-imm.h
2019-04-09 11:21:13 +01:00
vdso
arm64: vdso: Fix clock_getres() for CLOCK_REALTIME
2019-04-16 18:15:56 +01:00
.gitignore
…
acpi_numa.c
mm: remove include/linux/bootmem.h
2018-10-31 08:54:16 -07:00
acpi_parking_protocol.c
arm64: fix endianness annotation in acpi_parking_protocol.c
2017-06-29 11:33:15 +01:00
acpi.c
arm64: KVM/mm: Move SEA handling behind a single 'claim' interface
2019-02-07 23:10:45 +01:00
alternative.c
arm64: alternative: Apply alternatives early in boot process
2019-02-06 10:05:20 +00:00
armv8_deprecated.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
asm-offsets.c
arm64: vdso: Fix clock_getres() for CLOCK_REALTIME
2019-04-16 18:15:56 +01:00
cacheinfo.c
arm64: Add support for ACPI based firmware tables
2018-05-17 17:28:09 +01:00
cpu_errata.c
arm64: kpti: Avoid rewriting early page tables when KASLR is enabled
2019-01-10 17:49:35 +00:00
cpu_ops.c
arm64: cpu_ops: fix a leaked reference by adding missing of_node_put
2019-04-03 13:50:35 +01:00
cpu-reset.h
arm64: kexec: always reset to EL2 if present
2018-07-04 18:34:24 +01:00
cpu-reset.S
arm64: kexec_file: invoke the kernel without purgatory
2018-12-06 14:38:53 +00:00
cpufeature.c
arm64: Advertise ARM64_HAS_DCPODP cpu feature
2019-04-16 16:27:59 +01:00
cpuidle.c
ARM64 / cpuidle: Use new cpuidle macro for entering retention state
2018-01-02 13:50:34 +00:00
cpuinfo.c
arm64: Expose DC CVADP to userspace
2019-04-16 16:27:56 +01:00
crash_core.c
arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE
2018-09-11 11:08:49 +01:00
crash_dump.c
arm64: kdump: fix small typo
2018-11-02 17:24:17 +00:00
debug-monitors.c
arm64: Clear OSDLR_EL1 on CPU boot
2019-04-09 12:38:31 +01:00
efi-entry.S
arm64: Add software workaround for Falkor erratum 1041
2018-02-06 22:53:13 +00:00
efi-header.S
arm64: efi: split Image code and data into separate PE/COFF sections
2017-04-04 17:50:59 +01:00
efi-rt-wrapper.S
efi/arm64: Check whether x18 is preserved by runtime services calls
2018-03-09 08:58:22 +01:00
efi.c
efi/arm64: Check whether x18 is preserved by runtime services calls
2018-03-09 08:58:22 +01:00
entry-fpsimd.S
arm64/sve: Write ZCR_EL1 on context switch only if changed
2018-05-17 18:19:53 +01:00
entry-ftrace.S
arm64: frace: use asm EXPORT_SYMBOL()
2018-12-10 11:50:12 +00:00
entry.S
arm64: Rename get_thread_info()
2019-02-26 16:57:59 +00:00
fpsimd.c
arm64: HWCAP: add support for AT_HWCAP2
2019-04-16 16:27:12 +01:00
ftrace.c
Tracing changes for v4.21:
2018-12-31 11:46:59 -08:00
head.S
arm64: Use defines instead of magic numbers
2019-04-05 12:32:00 +01:00
hibernate-asm.S
arm64: mm: Offset TTBR1 to allow 52-bit PTRS_PER_PGD
2018-12-10 18:42:17 +00:00
hibernate.c
arm64: hibernate: Clean the __hyp_text to PoC after resume
2019-02-01 14:10:02 +00:00
hw_breakpoint.c
perf/arch/arm64: Implement hw_breakpoint_arch_parse()
2018-06-26 09:07:56 +02:00
hyp-stub.S
arm64: hyp-stub: Forbid kprobing of the hyp-stub
2019-02-01 14:10:01 +00:00
image.h
Merge branch 'for-next/kexec' into aarch64/for-next/core
2018-12-10 18:57:17 +00:00
insn.c
arm64/insn: add support for emitting ADR/ADRP instructions
2018-11-27 18:47:33 +00:00
io.c
arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io
2017-10-24 16:23:07 +01:00
irq.c
arm64: Fix HCR.TGE status for NMI contexts
2019-02-06 10:05:16 +00:00
jump_label.c
jump_label: move 'asm goto' support test to Kconfig
2019-01-06 09:46:51 +09:00
kaslr.c
arm64: kaslr: ensure randomized quantities are clean also when kaslr is off
2019-02-01 14:07:23 +00:00
kexec_image.c
arm64: kexec_file: forbid kdump via kexec_file_load()
2018-12-07 15:28:21 +00:00
kgdb.c
arm64: debug: Remove redundant user_mode(regs) checks from debug handlers
2019-04-09 11:21:13 +01:00
kuser32.S
arm64: compat: Add KUSER_HELPERS config option
2019-04-23 18:01:58 +01:00
machine_kexec_file.c
arm64: kexec_file: handle empty command-line
2019-02-05 09:34:49 +00:00
machine_kexec.c
arm64: kdump: no need to mark crashkernel pages manually PG_reserved
2019-03-05 21:07:19 -08:00
Makefile
arm64: compat: Add KUSER_HELPERS config option
2019-04-23 18:01:58 +01:00
module-plts.c
arm64/module: switch to ADRP/ADD sequences for PLT entries
2018-11-27 19:00:45 +00:00
module.c
arm64/module: switch to ADRP/ADD sequences for PLT entries
2018-11-27 19:00:45 +00:00
module.lds
arm64: ftrace: emit ftrace-mod.o contents through code
2017-12-01 13:04:59 +00:00
paravirt.c
x86/paravirt: Use a single ops structure
2018-09-03 16:50:35 +02:00
pci.c
arm64: PCI: Remove node-local allocations when initialising host controller
2018-09-17 16:33:23 -05:00
perf_callchain.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
perf_event.c
arm64: perf: remove misleading comment
2019-01-19 22:57:38 +00:00
perf_regs.c
compat: Move compat_timespec/ timeval to compat_time.h
2018-04-19 13:29:54 +02:00
pointer_auth.c
arm64: ptr auth: Move per-thread keys from thread_info to thread_struct
2018-12-13 16:42:47 +00:00
process.c
arm64: Unmask PMR before going idle
2019-02-06 10:05:18 +00:00
psci.c
arm64: remove unused asm/compiler.h header file
2018-10-01 11:57:04 +01:00
ptrace.c
arm64 updates for 5.1:
2019-03-10 10:17:23 -07:00
reloc_test_core.c
arm64: fix undefined reference to 'printk'
2018-03-19 18:14:25 +00:00
reloc_test_syms.S
arm64: fix undefined reference to 'printk'
2018-03-19 18:14:25 +00:00
relocate_kernel.S
arm64: kexec_file: invoke the kernel without purgatory
2018-12-06 14:38:53 +00:00
return_address.c
arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack
2018-12-22 08:21:02 -05:00
sdei.c
arm64: sdei: Mark sdei stack helper functions as static
2018-07-31 12:08:22 +01:00
setup.c
arm64: replace memblock_alloc_low with memblock_alloc
2019-03-27 18:12:41 +00:00
signal32.c
arm64: compat: Alloc separate pages for vectors and sigpage
2019-04-23 18:01:31 +01:00
signal.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
sigreturn32.S
arm64: compat: Split kuser32
2019-04-23 18:01:57 +01:00
sleep.S
arm64/mm: Pass ttbr1 as a parameter to __enable_mmu()
2018-09-25 15:10:54 +01:00
smccc-call.S
arm64: smccc: use asm EXPORT_SYMBOL()
2018-12-10 11:50:11 +00:00
smp_spin_table.c
arm64: Use __pa_symbol for kernel symbols
2017-01-12 15:05:39 +00:00
smp.c
arm64: Switch to PMR masking when starting CPUs
2019-02-06 10:05:20 +00:00
ssbd.c
arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3
2018-09-14 17:46:19 +01:00
stacktrace.c
arm64/stacktrace: Export save_stack_trace_regs()
2019-03-19 14:55:10 +00:00
suspend.c
arm64: mm: Support Common Not Private translations
2018-09-18 12:02:27 +01:00
sys32.c
arm64: implement syscall wrappers
2018-07-12 14:49:48 +01:00
sys_compat.c
arm64 fixes for -rc1
2019-01-05 11:28:39 -08:00
sys.c
arm64: implement syscall wrappers
2018-07-12 14:49:48 +01:00
syscall.c
arm64: compat: Don't pull syscall number from regs in arm_compat_syscall
2019-01-04 14:18:01 +00:00
time.c
arm64: Use ftrace_graph_get_ret_stack() instead of curr_ret_stack
2018-12-22 08:21:02 -05:00
topology.c
arm64: topology: re-introduce numa mask check for scheduler MC selection
2018-07-06 13:18:18 +01:00
trace-events-emulation.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
traps.c
arm64: Handle trapped DC CVADP
2019-04-16 16:27:36 +01:00
vdso.c
arm64: compat: Add KUSER_HELPERS config option
2019-04-23 18:01:58 +01:00
vmlinux.lds.S
arm64: relocatable: fix inconsistencies in linker script and options
2018-12-04 12:48:25 +00:00