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Russell King 42019fc50d ARM: vfp: use __copy_from_user() when restoring VFP state 
__get_user_error() is used as a fast accessor to make copying structure
members in the signal handling path as efficient as possible.  However,
with software PAN and the recent Spectre variant 1, the efficiency is
reduced as these are no longer fast accessors.

In the case of software PAN, it has to switch the domain register around
each access, and with Spectre variant 1, it would have to repeat the
access_ok() check for each access.

Use __copy_from_user() rather than __get_user_err() for individual
members when restoring VFP state.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2018-08-02 17:41:37 +01:00
..
.gitignore
…
arch_timer.c
arch_timer: Move to generic sched_clock framework
2013-10-09 16:54:10 -07:00
armksyms.c
ARM: 8745/1: get rid of __memzero()
2018-01-21 15:37:56 +00:00
asm-offsets.c
ARM: 8708/1: NOMMU: Rework MPU to be mostly done in C
2017-10-23 16:58:59 +01:00
atags_compat.c
ARM: convert printk(KERN_* to pr_*
2014-11-21 15:24:50 +00:00
atags_parse.c
ARM: better diagnostics with missing/corrupt dtb
2017-09-29 13:57:21 +01:00
atags_proc.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
atags.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bios32.c
PCI: Remove PCI_REASSIGN_ALL_RSRC use on arm and arm64
2017-12-18 23:07:43 -06:00
bugs.c
ARM: bugs: add support for per-processor bug checking
2018-05-31 10:39:34 +01:00
cpuidle.c
ARM: Convert to using %pOF instead of full_name
2017-08-16 22:25:30 +02:00
crash_dump.c
ARM: 8012/1: kdump: Avoid overflow when converting pfn to physaddr
2014-04-07 12:10:00 +01:00
debug.S
Merge branches 'fixes', 'misc' and 'sa1111-for-next' into for-next
2017-11-08 19:42:43 +00:00
devtree.c
ARM: Convert to using %pOF instead of full_name
2017-08-16 22:25:30 +02:00
dma-isa.c
ARM: convert printk(KERN_* to pr_*
2014-11-21 15:24:50 +00:00
dma.c
ARM: convert printk(KERN_* to pr_*
2014-11-21 15:24:50 +00:00
early_printk.c
ARM: 8705/1: early_printk: use printascii() rather than printch()
2017-10-12 11:29:29 +01:00
efi.c
ARM/efi: Apply strict permissions for UEFI Runtime Services regions
2016-04-28 11:33:53 +02:00
elf.c
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2017-11-16 12:50:35 -08:00
entry-armv.S
ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code
2017-12-17 22:14:21 +00:00
entry-common.S
ARM: spectre-v1: fix syscall entry
2018-05-31 23:27:26 +01:00
entry-ftrace.S
ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS
2017-06-18 22:25:16 +01:00
entry-header.S
ARM: spectre-v1: fix syscall entry
2018-05-31 23:27:26 +01:00
entry-v7m.S
ARM: rename S_FRAME_SIZE to PT_REGS_SIZE
2016-06-22 19:54:28 +01:00
fiq.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fiqasm.S
ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+
2014-07-18 12:29:04 +01:00
ftrace.c
ARM: 8678/1: ftrace: Adds support for CONFIG_DYNAMIC_FTRACE_WITH_REGS
2017-06-18 22:25:16 +01:00
head-common.S
ARM: 8745/1: get rid of __memzero()
2018-01-21 15:37:56 +00:00
head-inflate-data.c
ARM: XIP kernel: store .data compressed in ROM
2017-09-10 19:34:53 -04:00
head-nommu.S
ARM: 8713/1: NOMMU: Support MPU in XIP configuration
2017-10-23 16:59:31 +01:00
head.S
ARM: align .data section
2017-08-14 16:22:55 +01:00
hibernate.c
ARM: use virt_to_idmap() for soft_restart()
2016-02-08 15:48:32 +00:00
hw_breakpoint.c
ARM: 8733/1: hw_breakpoint: Mark variables as __ro_after_init
2017-12-17 22:16:20 +00:00
hyp-stub.S
ARM: align .data section
2017-08-14 16:22:55 +01:00
insn.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
io.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.c
ARM: 8499/1: irq: l2c: do not print error in case of missing l2c from
2016-01-26 23:49:02 +00:00
isa.c
arm: convert use of typedef ctl_table to struct ctl_table
2014-06-06 16:08:15 -07:00
iwmmxt.S
ARM: align .data section
2017-08-14 16:22:55 +01:00
jump_label.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kgdb.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
machine_kexec.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
Makefile
ARM: bugs: prepare processor bug infrastructure
2018-05-31 10:39:18 +01:00
module-plts.c
ARM: 8662/1: module: split core and init PLT sections
2017-03-17 10:01:28 +00:00
module.c
ARM: Silence first allocation with CONFIG_ARM_MODULE_PLTS=y
2017-05-11 14:43:31 +01:00
module.lds
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
opcodes.c
…
paravirt.c
arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops
2015-12-21 14:40:54 +00:00
patch.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
perf_callchain.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
perf_event_v6.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
perf_event_v7.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
perf_event_xscale.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
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
pj4-cp0.c
ARM: 8452/3: PJ4: make coprocessor access sequences buildable in Thumb2 mode
2016-01-04 11:12:10 +00:00
process.c
arm: do not use print_symbol()
2018-01-05 15:19:56 +01:00
psci_smp.c
ARM: use const and __initconst for smp_operations
2015-12-01 22:17:45 +01:00
ptrace.c
signal/ptrace: Add force_sig_ptrace_errno_trap and use it where needed
2018-01-22 19:07:11 -06:00
reboot.c
ARM: soft-reboot into same mode that we entered the kernel
2017-04-09 07:49:24 -07:00
reboot.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
relocate_kernel.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
return_address.c
ARM: 8328/1: remove empty preprocessor #else branch
2015-03-28 16:54:53 +00:00
setup.c
ARM: better diagnostics with missing/corrupt dtb
2017-09-29 13:57:21 +01:00
signal.c
ARM: vfp: use __copy_from_user() when restoring VFP state
2018-08-02 17:41:37 +01:00
signal.h
ARM: signal handling support for FDPIC_FUNCPTRS functions
2017-09-10 19:31:46 -04:00
sigreturn_codes.S
ARM: signal handling support for FDPIC_FUNCPTRS functions
2017-09-10 19:31:46 -04:00
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
arm: kernel: Add SMC structure parameter
2017-02-03 18:46:33 +00:00
smp_scu.c
ARM: smp_scu: allow the platform code to read the SCU CPU status
2017-10-29 08:29:30 -07:00
smp_tlb.c
ARM: 8613/1: Fix the uaccess crash on PB11MPCore
2017-01-16 17:30:46 +00:00
smp_twd.c
clocksource/drivers: Rename CLOCKSOURCE_OF_DECLARE to TIMER_OF_DECLARE
2017-06-14 11:58:45 +02:00
smp.c
ARM: bugs: hook processor bug checking into SMP and suspend paths
2018-05-31 10:39:29 +01:00
stacktrace.c
ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code
2017-12-17 22:14:21 +00:00
suspend.c
ARM: bugs: hook processor bug checking into SMP and suspend paths
2018-05-31 10:39:29 +01:00
swp_emulate.c
sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>
2017-03-02 08:42:37 +01:00
sys_arm.c
…
sys_oabi-compat.c
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
tcm.c
ARM: 8388/1: tcm: Don't crash when TCM banks are protected by TrustZone
2015-06-06 10:37:28 +01:00
thumbee.c
ARM: convert printk(KERN_* to pr_*
2014-11-21 15:24:50 +00:00
time.c
treewide/trivial: Remove ';;$' typo noise
2018-02-22 10:59:33 +01:00
topology.c
ARM: Convert to using %pOF instead of full_name
2017-08-16 22:25:30 +02:00
traps.c
Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
2018-02-02 09:50:51 -08:00
unwind.c
ARM: 8176/1: Use current_stack_pointer in unwind_backtrace
2014-11-13 23:58:09 +00:00
v7m.c
…
vdso.c
ARM: 8748/1: mm: Define vdso_start, vdso_end as array
2018-03-24 14:27:49 +00:00
vmlinux-xip.lds.S
ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code
2017-12-17 22:14:21 +00:00
vmlinux.lds.S
ARM: probes: avoid adding kprobes to sensitive kernel-entry/exit code
2017-12-17 22:14:21 +00:00
xscale-cp0.c
ARM: make xscale iwmmxt code multiplatform aware
2015-12-01 21:44:24 +01:00