James Morse 7054419600 arm64: kernel: Don't toggle PAN on systems with UAO ... If a CPU supports both Privileged Access Never (PAN) and User Access Override (UAO), we don't need to disable/re-enable PAN round all copy_to_user() like calls. UAO alternatives cause these calls to use the 'unprivileged' load/store instructions, which are overridden to be the privileged kind when fs==KERNEL_DS. This patch changes the copy_to_user() calls to have their PAN toggling depend on a new composite 'feature' ARM64_ALT_PAN_NOT_UAO. If both features are detected, PAN will be enabled, but the copy_to_user() alternatives will not be applied. This means PAN will be enabled all the time for these functions. If only PAN is detected, the toggling will be enabled as normal. This will save the time taken to disable/re-enable PAN, and allow us to catch copy_to_user() accesses that occur with fs==KERNEL_DS. Futex and swp-emulation code continue to hang their PAN toggling code on ARM64_HAS_PAN. Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2016-02-18 17:27:05 +00:00
..
vdso	arm64: vdso: Mark vDSO code as read-only	2016-02-16 18:20:23 +00:00
.gitignore	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00
acpi_parking_protocol.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
acpi.c	Power management and ACPI updates for v4.4-rc1	2015-11-04 18:10:13 -08:00
alternative.c	arm64: mm: fold alternatives into .init	2015-12-10 17:36:08 +00:00
arm64ksyms.c	ARM: 8480/2: arm64: add implementation for arm-smccc	2016-01-04 16:24:45 +00:00
armv8_deprecated.c	arm64: add __init/__initdata section marker to some functions/variables	2015-12-02 12:17:11 +00:00
asm-offsets.c	* s390: Support for runtime instrumentation within guests,	2016-01-12 13:22:12 -08:00
cacheinfo.c	arm64: kernel: add support for cpu cache information	2015-01-15 11:55:07 +00:00
cpu_errata.c	arm64: prefetch: add alternative pattern for CPUs without a prefetcher	2016-02-16 15:12:32 +00:00
cpu_ops.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
cpufeature.c	arm64: kernel: Don't toggle PAN on systems with UAO	2016-02-18 17:27:05 +00:00
cpuidle.c	arm64: cpuidle: add __init section marker to arm_cpuidle_init	2015-07-02 17:44:27 +01:00
cpuinfo.c	arm64: add ARMv8.2 id_aa64mmfr2 boiler plate	2016-02-18 12:00:01 +00:00
debug-monitors.c	arm64: replace read_lock to rcu lock in call_step_hook	2016-02-16 15:40:45 +00:00
efi-entry.S	arm64/efi: isolate EFI stub from the kernel proper	2015-10-12 16:20:12 +01:00
efi.c	arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM	2015-12-09 16:57:23 +00:00
entry32.S	arm64: entry32: remove pointless register assignment	2015-07-10 16:47:13 +01:00
entry-fpsimd.S	arm64: fpsimd: fix a typo in fpsimd_save_partial_state ENDPROC	2014-07-31 11:42:42 +01:00
entry-ftrace.S	arm64: ftrace: fix function_graph tracer panic	2015-10-02 11:12:56 +01:00
entry.S	arm64: entry: remove pointless SPSR mode check	2016-01-06 15:40:38 +00:00
fpsimd.c	arm64: add __init/__initdata section marker to some functions/variables	2015-12-02 12:17:11 +00:00
ftrace.c	arm64: ftrace: modify a stack frame in a safe way	2015-12-21 17:26:01 +00:00
head.S	arm64: mm: place empty_zero_page in bss	2016-02-16 15:10:44 +00:00
hw_breakpoint.c	arm64: Fix missing #include in hw_breakpoint.c	2015-10-12 12:10:53 +01:00
hyp-stub.S	irqchip: gic-v3: Initial support for GICv3	2014-07-08 22:11:47 +00:00
image.h	arm64: hide __efistub_ aliases from kallsyms	2016-01-25 11:09:04 +00:00
insn.c	arm64: insn: remove BUG_ON from codegen	2016-01-17 19:15:26 -05:00
io.c	arm64: optimize memcpy_{from,to}io() and memset_io()	2014-11-06 17:25:27 +00:00
irq.c	arm64: remove irq_count and do_softirq_own_stack()	2015-12-21 17:26:01 +00:00
jump_label.c	jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}	2015-08-03 11:34:12 +02:00
kgdb.c	arm64/debug: Simplify BRK insn opcode declarations	2015-07-27 11:08:42 +01:00
kuser32.S	arm64: Add __NR_* definitions for compat syscalls	2014-07-10 11:02:40 +01:00
Makefile	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
module.c	arm64: module: avoid undefined shift behavior in reloc_data()	2016-01-05 11:27:20 +00:00
paravirt.c	arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops	2015-12-21 14:40:54 +00:00
pci.c	ARM64: PCI: do not enable resources on PROBE_ONLY systems	2015-07-30 20:17:07 +01:00
perf_callchain.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
perf_event.c	arm64: perf: add support for Cortex-A72	2015-12-22 14:45:35 +00:00
perf_regs.c	perf: Move task_pt_regs sampling into arch code	2015-01-09 11:12:28 +01:00
process.c	arm64: kernel: Add support for User Access Override	2016-02-18 17:27:04 +00:00
psci.c	drivers: firmware: psci: move power_state handling to generic code	2015-10-02 14:35:16 +01:00
ptrace.c	arm64: Clear out any singlestep state on a ptrace detach operation	2015-12-07 17:48:21 +00:00
return_address.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
setup.c	arm64: unmap idmap earlier	2016-02-16 15:10:45 +00:00
signal32.c	arm64: compat: fix vfp save/restore across signal handlers in big-endian	2015-09-17 11:57:03 +01:00
signal.c	arm64: Removed unused variable	2015-04-13 20:40:10 +02:00
sleep.S	arm64: Store struct thread_info in sp_el0	2015-12-08 11:40:48 +00:00
smccc-call.S	ARM: 8480/2: arm64: add implementation for arm-smccc	2016-01-04 16:24:45 +00:00
smp_spin_table.c	ARM64: kernel: make cpu_ops hooks DT agnostic	2015-05-19 16:09:29 +01:00
smp.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
stacktrace.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
suspend.c	arm64: unify idmap removal	2016-02-16 15:10:44 +00:00
sys32.c	arm64: fix implementation of mmap2 compat syscall	2015-03-19 10:43:51 +00:00
sys_compat.c	arm64: compat: align cacheflush syscall with arch/arm	2014-12-01 13:31:12 +00:00
sys.c	arm64: make sys_call_table const	2015-01-27 09:38:08 +00:00
time.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
topology.c	arm64: kernel: remove non-legit DT warnings when booting using ACPI	2015-07-27 11:08:41 +01:00
trace-events-emulation.h	arm64: Trace emulation of AArch32 legacy instructions	2014-11-20 16:35:02 +00:00
traps.c	arm64: traps: address fallout from printk -> pr_* conversion	2015-12-21 17:26:02 +00:00
vdso.c	arm64: VDSO: fix coarse clock monotonicity regression	2015-08-10 15:37:45 +01:00
vmlinux.lds.S	arm64: ensure _stext and _etext are page-aligned	2016-02-16 15:10:46 +00:00