Ard Biesheuvel 5ea5306c32 arm64: alternatives: apply boot time fixups via the linear mapping ... One important rule of thumb when desiging a secure software system is that memory should never be writable and executable at the same time. We mostly adhere to this rule in the kernel, except at boot time, when regions may be mapped RWX until after we are done applying alternatives or making other one-off changes. For the alternative patching, we can improve the situation by applying the fixups via the linear mapping, which is never mapped with executable permissions. So map the linear alias of .text with RW- permissions initially, and remove the write permissions as soon as alternative patching has completed. Reviewed-by: Laura Abbott <labbott@redhat.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2017-03-23 13:54:19 +00:00
..
probes	arm64: kprobes: remove kprobe_exceptions_notify	2017-03-10 17:41:19 +00:00
vdso	arm64: Add support for CLOCK_MONOTONIC_RAW in clock_gettime() vDSO	2016-07-12 16:06:32 +01:00
.gitignore	arm64: Build infrastructure	2012-09-17 13:42:21 +01:00
acpi_numa.c	arm64/numa: avoid inconsistent information to be printed	2016-09-09 14:59:08 +01:00
acpi_parking_protocol.c	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
acpi.c	ACPI / osl: Remove acpi_get_table_with_size()/early_acpi_os_unmap_memory() users	2016-12-21 02:36:38 +01:00
alternative.c	arm64: alternatives: apply boot time fixups via the linear mapping	2017-03-23 13:54:19 +00:00
arm64ksyms.c	arm: kernel: Add SMC structure parameter	2017-02-03 18:46:33 +00:00
armv8_deprecated.c	kprobes: move kprobe declarations to asm-generic/kprobes.h	2017-02-27 18:43:45 -08:00
asm-offsets.c	arm: kernel: Add SMC structure parameter	2017-02-03 18:46:33 +00:00
cacheinfo.c	arm64: cacheinfo: Remove CCSIDR-based cache information probing	2017-03-20 16:16:54 +00:00
cpu_errata.c	arm64: Work around Falkor erratum 1003	2017-02-10 11:22:12 +00:00
cpu_ops.c	arm64: apply __ro_after_init to some objects	2016-08-22 12:32:29 +01:00
cpu-reset.h	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
cpu-reset.S	arm64: Add back cpu reset routines	2016-06-27 16:31:25 +01:00
cpufeature.c	arm64: v8.3: Support for weaker release consistency	2017-03-20 16:30:22 +00:00
cpuidle.c	arm64: kernel: Update kerneldoc for cpu_suspend() rename	2017-03-10 18:06:24 +00:00
cpuinfo.c	arm64: v8.3: Support for weaker release consistency	2017-03-20 16:30:22 +00:00
debug-monitors.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
efi-entry.S	arm64: efi-entry.S: avoid open-coded adr_l	2017-01-17 17:41:14 +00:00
efi.c	arm64: mm: replace 'block_mappings_allowed' with 'page_mappings_only'	2016-11-07 18:15:04 +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: include asm/assembler.h in entry-ftrace.S	2017-02-15 11:34:25 +00:00
entry.S	arm64: avoid returning from bad_mode	2017-01-19 15:38:22 +00:00
fpsimd.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>	2017-03-02 08:42:29 +01:00
ftrace.c	ftrace: Add return address pointer to ftrace_ret_stack	2016-08-24 12:15:14 +02:00
head.S	arm64: move !VHE work to end of el2_setup	2017-03-22 17:21:38 +00:00
hibernate-asm.S	arm64: Introduce raw_{d,i}cache_line_size	2016-09-09 15:03:29 +01:00
hibernate.c	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
hw_breakpoint.c	cpu/hotplug: Cleanup state names	2016-12-25 10:47:44 +01:00
hyp-stub.S	arm64: Add back cpu reset routines	2016-06-27 16:31:25 +01:00
image.h	arm64 updates for 4.7:	2016-05-16 17:17:24 -07:00
insn.c	kprobes: move kprobe declarations to asm-generic/kprobes.h	2017-02-27 18:43:45 -08:00
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
kaslr.c	arm64: apply __ro_after_init to some objects	2016-08-22 12:32:29 +01:00
kgdb.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
kuser32.S	arm64: Add __NR_* definitions for compat syscalls	2014-07-10 11:02:40 +01:00
machine_kexec.c	arm64/kexec: Add pr_debug output	2016-06-27 16:31:26 +01:00
Makefile	efi: arm64: Add vmlinux debug link to the Image binary	2017-02-03 15:22:37 +00:00
module-plts.c	arm64: add support for module PLTs	2016-02-24 14:57:24 +00:00
module.c	arm64: add support for kernel ASLR	2016-02-24 14:57:27 +00:00
module.lds	arm64: add support for module PLTs	2016-02-24 14:57:24 +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	PCI/ACPI: Extend pci_mcfg_lookup() to return ECAM config accessors	2016-12-06 13:45:48 -06:00
perf_callchain.c	perf core: Add a 'nr' field to perf_event_callchain_context	2016-05-16 23:11:51 -03:00
perf_event.c	KVM: arm64: Fix the issues when guest PMCCFILTR is configured	2016-11-18 09:06:58 +00:00
perf_regs.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
process.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
psci.c	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
ptrace.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
relocate_kernel.S	arm64: Introduce raw_{d,i}cache_line_size	2016-09-09 15:03:29 +01:00
return_address.c	arm64: factor out current_stack_pointer	2016-11-11 18:25:43 +00:00
setup.c	sched/headers: Prepare to move 'init_task' and 'init_thread_union' from <linux/sched.h> to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
signal32.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
signal.c	arm64: Add uprobe support	2016-11-07 18:15:21 +00:00
sleep.S	arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx	2016-11-11 18:25:44 +00:00
smccc-call.S	firmware: qcom: scm: Fix interrupted SCM calls	2017-02-03 18:46:33 +00:00
smp_spin_table.c	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
smp.c	arm64: alternatives: apply boot time fixups via the linear mapping	2017-03-23 13:54:19 +00:00
stacktrace.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
suspend.c	arm64: move sp_el0 and tpidr_el1 into cpu_suspend_ctx	2016-11-11 18:25:44 +00:00
sys32.c	arm64: fix implementation of mmap2 compat syscall	2015-03-19 10:43:51 +00:00
sys_compat.c	sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency	2017-03-02 08:42:37 +01:00
sys.c	arm64: compat: Check for AArch32 state	2016-04-20 12:22:42 +01:00
time.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
topology.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h>	2017-03-02 08:42:26 +01:00
trace-events-emulation.h	arm64: Trace emulation of AArch32 legacy instructions	2014-11-20 16:35:02 +00:00
traps.c	sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>	2017-03-02 08:42:37 +01:00
vdso.c	arm64: Use __pa_symbol for kernel symbols	2017-01-12 15:05:39 +00:00
vmlinux.lds.S	arm64: Introduce uaccess_{disable,enable} functionality based on TTBR0_EL1	2016-11-21 18:48:53 +00:00