forge/linux-uconsole
1
0
Fork 0
Code Issues 1 Pull requests Projects Releases Packages Wiki Activity Actions
linux-uconsole/arch/arm64/include/asm
History
James Morse da643dc17f arm64: cpufeature: Schedule enable() calls instead of calling them via IPI 
commit 2a6dcb2b5f upstream.

The enable() call for a cpufeature/errata is called using on_each_cpu().
This issues a cross-call IPI to get the work done. Implicitly, this
stashes the running PSTATE in SPSR when the CPU receives the IPI, and
restores it when we return. This means an enable() call can never modify
PSTATE.

To allow PAN to do this, change the on_each_cpu() call to use
stop_machine(). This schedules the work on each CPU which allows
us to modify PSTATE.

This involves changing the protype of all the enable() functions.

enable_cpu_capabilities() is called during boot and enables the feature
on all online CPUs. This path now uses stop_machine(). CPU features for
hotplug'd CPUs are enabled by verify_local_cpu_features() which only
acts on the local CPU, and can already modify the running PSTATE as it
is called from secondary_start_kernel().

Reported-by: Tony Thompson <anthony.thompson@arm.com>
Reported-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
[Removed enable() hunks for features/errata v4.4. doesn't have. Changed
 caps->enable arg in enable_cpu_capabilities()]
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2016-12-08 07:15:24 +01:00
..
xen xen/events: Support event channel rebind on ARM 2015-08-20 12:24:15 +01:00
acenv.h ARM64 / ACPI: Get RSDP and ACPI boot-time tables 2015-03-25 11:49:30 +00:00
acpi.h Power management and ACPI updates for v4.4-rc1 2015-11-04 18:10:13 -08:00
alternative.h arm64: alternative: put secondary CPUs into polling loop during patch 2015-07-30 19:07:28 +01:00
arch_gicv3.h irqchip/gic-v3: Make sure read from ICC_IAR1_EL1 is visible on redestributor 2016-09-15 08:27:43 +02:00
arch_timer.h arm64: fix missing linux/bug.h include in asm/arch_timer.h 2015-01-07 11:40:59 +00:00
arm-cci.h arm-cci: Get rid of secure transactions for PMU driver 2015-03-27 13:44:35 +00:00
asm-offsets.h
assembler.h arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
atomic.h arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
atomic_ll_sc.h arm64: cmpxchg_dbl: fix return value type 2015-11-05 17:29:40 +00:00
atomic_lse.h arm64: cmpxchg_dbl: fix return value type 2015-11-05 17:29:40 +00:00
barrier.h arm64: barriers: fix smp_load_acquire to work with const arguments 2015-11-18 18:06:43 +00:00
bitops.h arch,arm64: Convert smp_mb__*() 2014-04-18 11:40:33 +02:00
bitrev.h ARM: 8189/1: arm64:add bitrev.h file to support rbit instruction 2014-12-22 16:47:32 +00:00
boot.h arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
bug.h arm64/BUG: Use BRK instruction for generic BUG traps 2015-07-27 11:08:42 +01:00
cache.h arm64: Increase the max granular size 2015-10-28 19:09:17 +00:00
cacheflush.h arm64: flush: use local TLB and I-cache invalidation 2015-10-07 11:45:27 +01:00
cachetype.h arm64: cachetype: fix definitions of ICACHEF_* flags 2015-10-28 18:32:12 +00:00
cmpxchg.h arm64: atomics: implement native {relaxed, acquire, release} atomics 2015-10-12 17:36:58 +01:00
compat.h arm64: do not include ptrace.h from compat.h 2015-11-17 13:24:36 +00:00
compiler.h
cpu.h arm64: Consolidate CPU Sanity check to CPU Feature infrastructure 2015-10-21 15:35:56 +01:00
cpu_ops.h ARM64: kernel: unify ACPI and DT cpus initialization 2015-05-19 16:09:29 +01:00
cpufeature.h arm64: cpufeature: Schedule enable() calls instead of calling them via IPI 2016-12-08 07:15:24 +01:00
cpuidle.h arm64: kernel: rename __cpu_suspend to keep it aligned with arm 2015-06-19 14:46:39 +01:00
cputype.h arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
dcc.h ARM64: TTY: hvc_dcc: Add support for ARM64 dcc 2015-10-04 17:49:27 +01:00
debug-monitors.h arm64: debug: rename enum debug_el to avoid symbol collision 2015-07-27 18:36:54 +01:00
device.h arm64: introduce is_device_dma_coherent 2014-12-04 12:41:49 +00:00
dma-mapping.h arm64: simplify dma_get_ops 2015-11-17 12:05:18 +00:00
dmi.h arm64: dmi: Add SMBIOS/DMI support 2014-11-05 09:03:25 +01:00
efi.h arm64/efi: move virtmap init to early initcall 2015-01-22 14:59:25 +00:00
elf.h arm64: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO 2016-09-07 08:32:36 +02:00
esr.h arm64/debug: Add missing #includes 2015-07-27 11:08:42 +01:00
exception.h arm64: Add __exception_irq_entry definition for function graph 2015-08-12 17:23:45 +01:00
exec.h
fb.h
fixmap.h arm64: Simplify NR_FIX_BTMAPS calculation 2015-10-19 17:54:07 +01:00
fpsimd.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
fpsimdmacros.h arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros 2015-01-29 17:24:39 +00:00
ftrace.h arm64: ftrace: Add system call tracepoint 2014-05-29 09:08:33 +01:00
futex.h arm64: atomics: prefetch the destination word for write prior to stxr 2015-07-27 15:28:53 +01:00
hardirq.h arm64: Remove ununsed set_irq_flags 2015-09-16 16:53:39 +02:00
hugetlb.h arm64: hugetlb: remove paragraph about writing to FSF 2015-07-27 11:08:40 +01:00
hw_breakpoint.h arm64: debug: Treat the BRPs/WRPs as unsigned 2015-11-26 18:08:36 +00:00
hwcap.h arm64/HWCAP: Use system wide safe values 2015-10-21 15:35:58 +01:00
hypervisor.h
insn.h arm64: insn: Add aarch64_{get,set}_branch_offset 2015-06-03 15:43:24 +01:00
io.h Revert "arm64: ioremap: add ioremap_cache macro" 2015-10-13 16:18:17 +01:00
irq.h xen: bug fixes for 4.4-rc2 2015-11-26 11:42:25 -08:00
irq_work.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
irqflags.h arm64: Add macros to manage processor debug state 2014-02-26 11:16:25 +00:00
jump_label.h locking/static_keys: Add a new static_key interface 2015-08-03 11:34:15 +02:00
kasan.h arm64: kasan: fix issues reported by sparse 2015-10-13 14:54:42 +01:00
Kbuild mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
kernel-pgtable.h arm64: Calculate size for idmap_pg_dir at compile time 2015-10-19 17:53:26 +01:00
kgdb.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kvm_arm.h arm64: KVM: Configure TCR_EL2.PS at runtime 2016-09-15 08:27:43 +02:00
kvm_asm.h arm64: KVM: Remove all traces of the ThumbEE registers 2015-09-17 13:13:26 +01:00
kvm_coproc.h arm64: KVM: common infrastructure for handling AArch32 CP14/CP15 2014-07-11 04:57:44 -07:00
kvm_emulate.h arm64: KVM: Get rid of old vcpu_reg() 2015-12-04 16:30:03 +00:00
kvm_host.h KVM: arm/arm64: implement kvm_arm_[halt,resume]_guest 2015-10-22 23:01:46 +02:00
kvm_mmio.h KVM: arm/arm64: rework MMIO abort handling to use KVM MMIO bus 2015-03-30 17:07:19 +01:00
kvm_mmu.h arm64 updates for 4.1: 2015-04-16 13:58:29 -05:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
linkage.h
lse.h arm64: lse: rename ARM64_CPU_FEAT_LSE_ATOMICS for consistency 2015-07-27 15:28:54 +01:00
memblock.h
memory.h arm64 updates for 4.4: 2015-11-04 14:47:13 -08:00
mmu.h arm64: mm: rewrite ASID allocator and MM context-switching code 2015-10-07 11:55:41 +01:00
mmu_context.h arm64: use non-global mappings for UEFI runtime regions 2015-11-18 09:40:20 +00:00
module.h
neon.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
opcodes.h arm64: opcodes.h: Add arm big-endian config options before including arm header 2016-04-20 15:41:55 +09:00
page.h arm64: Add 16K page size support 2015-10-19 17:55:12 +01:00
pci.h ARM64 / ACPI: Introduce PCI stub functions for ACPI 2015-03-25 11:49:31 +00:00
percpu.h arm64: percpu: rewrite ll/sc loops in assembly 2016-10-28 03:01:35 -04:00
perf_event.h arm64: perf: factor out callchain code 2015-07-27 11:08:39 +01:00
pgalloc.h arm64: move PGD_SIZE definition to pgalloc.h 2015-10-12 17:46:30 +01:00
pgtable-hwdef.h arm64: Ensure pmd_present() returns false after pmd_mknotpresent() 2016-06-01 12:15:48 -07:00
pgtable-types.h arm64: expose number of page table levels on Kconfig level 2015-04-14 16:49:01 -07:00
pgtable.h arm64: Implement pmdp_set_access_flags() for hardware AF/DBM 2016-06-01 12:15:48 -07:00
proc-fns.h arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00
processor.h arm64: cpufeature: Schedule enable() calls instead of calling them via IPI 2016-12-08 07:15:24 +01:00
ptrace.h arm64: kernel: Save and restore UAO and addr_limit on exception entry 2016-08-20 18:09:16 +02:00
seccomp.h arm64: add seccomp support 2014-11-28 10:24:59 +00:00
shmparam.h
signal32.h arm64: Use get_signal() signal_setup_done() 2014-08-06 12:56:16 +02:00
smp.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
smp_plat.h arm64: remove dead-code depending on CONFIG_UP_LATE_INIT 2015-07-29 18:32:09 +01:00
sparsemem.h arm64: mm: update max pa bits to 48 2014-08-19 20:23:02 +01:00
spinlock.h arm64: spinlocks: implement smp_mb__before_spinlock() as smp_mb() 2016-09-24 10:07:41 +02:00
spinlock_types.h arm64: include linux/types.h in asm/spinlock_types.h 2015-07-27 11:09:34 +01:00
stackprotector.h arm64: Add CONFIG_CC_STACKPROTECTOR 2014-07-09 12:23:48 +01:00
stacktrace.h
stat.h
string.h arm64: add KASAN support 2015-10-12 17:46:36 +01:00
suspend.h arm64: kernel: rename __cpu_suspend to keep it aligned with arm 2015-06-19 14:46:39 +01:00
sync_bitops.h
syscall.h arm64: Add audit support 2014-07-10 11:06:00 +01:00
sysreg.h arm64: Keep track of CPU feature registers 2015-10-21 15:35:37 +01:00
system_misc.h arm64: use private ratelimit state along with show_unhandled_signals 2015-06-19 16:26:15 +01:00
thread_info.h arm64: Add 16K page size support 2015-10-19 17:55:12 +01:00
timex.h arm64: kernel: compiling issue, need delete read_current_timer() 2013-06-10 17:58:20 +01:00
tlb.h arm64: tlbflush: avoid flushing when fullmm == 1 2015-10-07 11:56:21 +01:00
tlbflush.h arm64: tlb: remove redundant barrier from __flush_tlb_pgtable 2015-10-07 11:56:33 +01:00
topology.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
traps.h arm64: Add __exception_irq_entry definition for function graph 2015-08-12 17:23:45 +01:00
uaccess.h arm64: kernel: Add support for Privileged Access Never 2015-07-27 11:08:41 +01:00
unistd.h arm64: compat: wire up new syscalls 2015-10-14 13:51:41 +01:00
unistd32.h arm64: compat: wire up new syscalls 2015-10-14 13:51:41 +01:00
vdso.h
vdso_datapage.h
virt.h arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S 2014-07-11 04:57:35 -07:00
word-at-a-time.h arm64: dcache: select DCACHE_WORD_ACCESS for little-endian CPUs 2013-12-19 17:43:08 +00:00