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linux/arch/arm64/kernel
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Ard Biesheuvel 1e9de1d220 arm64/efi: Ignore EFI_MEMORY_XP attribute if RP and/or WP are set 
The UEFI memory map is a bit vague about how to interpret the
EFI_MEMORY_XP attribute when it is combined with EFI_MEMORY_RP and/or
EFI_MEMORY_WP, which have retroactively been redefined as cacheability
attributes rather than permission attributes.

So let's ignore EFI_MEMORY_XP if _RP and/or _WP are also set. In this
case, it is likely that they are being used to describe the capability
of the region (i.e., whether it has the controls to reconfigure it as
non-executable) rather than the nature of the contents of the region
(i.e., whether it contains data that we will never attempt to execute)

Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tyler Baicar <tbaicar@codeaurora.org>
Cc: Vasyl Gomonovych <gomonovych@gmail.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180102181042.19074-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
 		2018-01-03 14:03:48 +01:00
..
probes License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vdso arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
Makefile arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
acpi.c ACPI / boot: Correct address space of __acpi_map_table() 2017-07-24 22:47:56 +02:00
acpi_numa.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
acpi_parking_protocol.c arm64: fix endianness annotation in acpi_parking_protocol.c 2017-06-29 11:33:15 +01:00
alternative.c arm64: fix endianness annotation for __apply_alternatives()/get_alt_insn() 2017-06-29 16:32:43 +01:00
arm64ksyms.c arm64: switch to RAW_COPY_USER 2017-03-28 18:23:24 -04:00
armv8_deprecated.c arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
asm-offsets.c arm64: unwind: reference pt_regs via embedded stack frame 2017-08-09 14:07:13 +01:00
cacheinfo.c arm64: cacheinfo: Remove CCSIDR-based cache information probing 2017-03-20 16:16:54 +00:00
cpu-reset.S arm64: Add software workaround for Falkor erratum 1041 2017-12-12 11:45:19 +00:00
cpu-reset.h arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
cpu_errata.c arm64: Add workaround for Cavium Thunder erratum 30115 2017-06-15 09:45:04 +01:00
cpu_ops.c arm64: cpu_ops: Add missing 'const' qualifiers 2017-12-01 13:05:08 +00:00
cpufeature.c arm64/sve: Report SVE to userspace via CPUID only if supported 2017-12-14 15:14:30 +00:00
cpuidle.c arm64: kernel: Update kerneldoc for cpu_suspend() rename 2017-03-10 18:06:24 +00:00
cpuinfo.c arm64/sve: Detect SVE and activate runtime support 2017-11-03 15:24:21 +00:00
crash_dump.c arm64: kdump: provide /proc/vmcore file 2017-04-05 18:31:38 +01:00
debug-monitors.c arm64: introduce an order for exceptions 2017-11-02 15:55:41 +00:00
efi-entry.S arm64: Add software workaround for Falkor erratum 1041 2017-12-12 11:45:19 +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.c arm64/efi: Ignore EFI_MEMORY_XP attribute if RP and/or WP are set 2018-01-03 14:03:48 +01:00
entry-fpsimd.S arm64/sve: Low-level SVE architectural state manipulation functions 2017-11-03 15:24:14 +00:00
entry-ftrace.S arm64: Fix static use of function graph 2017-11-03 12:05:23 +00:00
entry.S arm64/sve: Detect SVE and activate runtime support 2017-11-03 15:24:21 +00:00
entry32.S arm64: entry32: remove pointless register assignment 2015-07-10 16:47:13 +01:00
fpsimd.c arm64: fpsimd: Fix copying of FP state from signal frame into task struct 2017-12-15 16:12:35 +00:00
ftrace.c arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
head.S arm64: Add software workaround for Falkor erratum 1041 2017-12-12 11:45:19 +00:00
hibernate-asm.S arm64: Introduce raw_{d,i}cache_line_size 2016-09-09 15:03:29 +01:00
hibernate.c arm64: explicitly mask all exceptions 2017-11-02 15:55:40 +00:00
hw_breakpoint.c arm64: hw_breakpoint: Use linux/uaccess.h instead of asm/uaccess.h 2017-12-12 11:53:26 +00:00
hyp-stub.S arm64: hyp-stub: Zero x0 on successful stub handling 2017-04-09 07:49:35 -07:00
image.h arm64 updates for 4.7: 2016-05-16 17:17:24 -07:00
insn.c arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
io.c arm64: Avoid aligning normal memory pointers in __memcpy_{to,from}io 2017-10-24 16:23:07 +01:00
irq.c arm64: add basic VMAP_STACK support 2017-08-15 18:36:04 +01:00
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: kaslr: Adjust the offset to avoid Image across alignment boundary 2017-08-22 18:15:42 +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: explicitly mask all exceptions 2017-11-02 15:55:40 +00:00
module-plts.c arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
module.c arm64: fix endianness annotation for reloc_insn_movw() & reloc_insn_imm() 2017-06-29 11:09:39 +01:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +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: Add a generic weak pcibios_align_resource() 2017-08-02 14:53:16 -05:00
perf_callchain.c arm64: unwind: remove sp from struct stackframe 2017-08-09 14:10:29 +01:00
perf_event.c arm64: perf: remove unsupported events for Cortex-A73 2017-12-01 13:05:08 +00:00
perf_regs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
process.c arm64: fpsimd: Prevent registers leaking from dead tasks 2017-12-06 18:02:21 +00:00
psci.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
ptrace.c arm64/sve: ptrace and ELF coredump support 2017-11-03 15:24:18 +00:00
reloc_test_core.c arm64: relocation testing module 2017-04-04 17:03:32 +01:00
reloc_test_syms.S arm64: relocation testing module 2017-04-04 17:03:32 +01:00
relocate_kernel.S arm64: Add software workaround for Falkor erratum 1041 2017-12-12 11:45:19 +00:00
return_address.c arm64: unwind: remove sp from struct stackframe 2017-08-09 14:10:29 +01:00
setup.c arm64: Move the async/fiq helpers to explicitly set process context flags 2017-11-02 15:55:41 +00:00
signal.c arm64/sve: Signal handling support 2017-11-03 15:24:16 +00:00
signal32.c arm64/sve: Signal handling support 2017-11-03 15:24:16 +00:00
sleep.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
smccc-call.S firmware: qcom: scm: Fix interrupted SCM calls 2017-02-03 18:46:33 +00:00
smp.c arm64: Move the async/fiq helpers to explicitly set process context flags 2017-11-02 15:55:41 +00:00
smp_spin_table.c arm64: Use __pa_symbol for kernel symbols 2017-01-12 15:05:39 +00:00
stacktrace.c arm64: stacktrace: avoid listing stacktrace functions in stacktrace 2017-09-13 18:53:16 -07:00
suspend.c arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
sys.c arm64: compat: Check for AArch32 state 2016-04-20 12:22:42 +01:00
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
time.c arm64: unwind: remove sp from struct stackframe 2017-08-09 14:10:29 +01:00
topology.c arm64: Convert to using %pOF instead of full_name 2017-07-20 10:28:41 +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 updates for 4.15 2017-11-15 10:56:56 -08:00
vdso.c arm64/vdso: Support mremap() for vDSO 2017-08-09 12:16:28 +01:00
vmlinux.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00