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a96a33b1ca
linux/arch/arm64/kernel
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Steve Capper a96a33b1ca arm64: mm: Prevent mismatched 52-bit VA support 
For cases where there is a mismatch in ARMv8.2-LVA support between CPUs
we have to be careful in allowing secondary CPUs to boot if 52-bit
virtual addresses have already been enabled on the boot CPU.

This patch adds code to the secondary startup path. If the boot CPU has
enabled 52-bit VAs then ID_AA64MMFR2_EL1 is checked to see if the
secondary can also enable 52-bit support. If not, the secondary is
prevented from booting and an error message is displayed indicating why.

Technically this patch could be implemented using the cpufeature code
when considering 52-bit userspace support. However, we employ low level
checks here as the cpufeature code won't be able to run if we have
mismatched 52-bit kernel va support.

Signed-off-by: Steve Capper <steve.capper@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2018-12-10 18:42:17 +00:00
..
probes arm64: kprobe: make page to RO mode when allocate it 2018-11-02 18:15:07 +00:00
vdso arm64: Add build salt to the vDSO 2018-07-18 01:18:05 +09:00
.gitignore
acpi_numa.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
acpi_parking_protocol.c
acpi.c mm: remove include/linux/bootmem.h 2018-10-31 08:54:16 -07:00
alternative.c arm64: alternative: Use true and false for boolean values 2018-08-08 11:20:54 +01:00
armv8_deprecated.c arm64: kill config_sctlr_el1() 2018-07-12 14:40:38 +01:00
asm-offsets.c arm64: KVM: Handle guest's ARCH_WORKAROUND_2 requests 2018-05-31 18:00:57 +01:00
cacheinfo.c arm64: Add support for ACPI based firmware tables 2018-05-17 17:28:09 +01:00
cpu_errata.c arm64: capabilities: Merge duplicate entries for Qualcomm erratum 1003 2018-12-06 11:47:44 +00:00
cpu_ops.c
cpu-reset.h arm64: kexec: always reset to EL2 if present 2018-07-04 18:34:24 +01:00
cpu-reset.S arm64: idmap: Use "awx" flags for .idmap.text .pushsection directives 2018-02-06 22:53:27 +00:00
cpufeature.c arm64: Add support for SB barrier and patch in over DSB; ISB sequences 2018-12-06 16:47:04 +00:00
cpuidle.c
cpuinfo.c arm64: Add support for SB barrier and patch in over DSB; ISB sequences 2018-12-06 16:47:04 +00:00
crash_core.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
crash_dump.c arm64: kdump: fix small typo 2018-11-02 17:24:17 +00:00
debug-monitors.c signal/arm64: Add and use arm64_force_sig_fault where appropriate 2018-09-27 21:54:43 +02:00
efi-entry.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
efi-header.S
efi-rt-wrapper.S efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
efi.c efi/arm64: Check whether x18 is preserved by runtime services calls 2018-03-09 08:58:22 +01:00
entry-fpsimd.S arm64/sve: Write ZCR_EL1 on context switch only if changed 2018-05-17 18:19:53 +01:00
entry-ftrace.S arm64: frace: use asm EXPORT_SYMBOL() 2018-12-10 11:50:12 +00:00
entry.S arm64: entry: Remove confusing comment 2018-12-06 16:47:05 +00:00
fpsimd.c signal/arm64: Use send_sig_fault where appropriate 2018-09-27 21:55:23 +02:00
ftrace.c arm64: ftrace: always pass instrumented pc in x0 2018-11-30 13:29:05 +00:00
head.S arm64: mm: Prevent mismatched 52-bit VA support 2018-12-10 18:42:17 +00:00
hibernate-asm.S arm64: mm: Offset TTBR1 to allow 52-bit PTRS_PER_PGD 2018-12-10 18:42:17 +00:00
hibernate.c arm64: ssbd: Restore mitigation status on CPU resume 2018-05-31 17:35:19 +01:00
hw_breakpoint.c perf/arch/arm64: Implement hw_breakpoint_arch_parse() 2018-06-26 09:07:56 +02:00
hyp-stub.S
image.h arm64: drop linker script hack to hide __efistub_ symbols 2018-11-30 12:49:51 +00:00
insn.c arm64/insn: add support for emitting ADR/ADRP instructions 2018-11-27 18:47:33 +00:00
io.c
irq.c arm64: Use the new GENERIC_IRQ_MULTI_HANDLER 2018-08-03 12:14:09 +02:00
jump_label.c arm64/kernel: jump_label: Switch to relative references 2018-09-27 17:56:47 +02:00
kaslr.c arm64/kernel: kaslr: reduce module randomization range to 4 GB 2018-03-08 13:49:26 +00:00
kgdb.c arm64/debug: Fix registers on sleeping tasks 2018-03-06 18:52:34 +00:00
kuser32.S
machine_kexec.c arm64: kernel: arch_crash_save_vmcoreinfo() should depend on CONFIG_CRASH_CORE 2018-09-11 11:08:49 +01:00
Makefile arm64: remove arm64ksyms.c 2018-12-10 11:50:12 +00:00
module-plts.c arm64/module: switch to ADRP/ADD sequences for PLT entries 2018-11-27 19:00:45 +00:00
module.c arm64/module: switch to ADRP/ADD sequences for PLT entries 2018-11-27 19:00:45 +00:00
module.lds
paravirt.c x86/paravirt: Use a single ops structure 2018-09-03 16:50:35 +02:00
pci.c arm64: PCI: Remove node-local allocations when initialising host controller 2018-09-17 16:33:23 -05:00
perf_callchain.c
perf_event.c arm64: perf: Reject stand-alone CHAIN events for PMUv3 2018-10-12 15:25:17 +01:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
process.c New gcc plugin: stackleak 2018-11-01 11:46:27 -07:00
psci.c arm64: remove unused asm/compiler.h header file 2018-10-01 11:57:04 +01:00
ptrace.c signal/arm64: Add and use arm64_force_sig_ptrace_errno_trap 2018-09-27 21:55:15 +02:00
reloc_test_core.c arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
reloc_test_syms.S arm64: fix undefined reference to 'printk' 2018-03-19 18:14:25 +00:00
relocate_kernel.S arm64: Add software workaround for Falkor erratum 1041 2018-02-06 22:53:13 +00:00
return_address.c
sdei.c arm64: sdei: Mark sdei stack helper functions as static 2018-07-31 12:08:22 +01:00
setup.c efi/arm: Defer persistent reservations until after paging_init() 2018-11-15 10:04:46 +01:00
signal32.c arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn 2018-07-12 14:49:48 +01:00
signal.c arm64: use {COMPAT,}SYSCALL_DEFINE0 for sigreturn 2018-07-12 14:49:48 +01:00
sleep.S arm64/mm: Pass ttbr1 as a parameter to __enable_mmu() 2018-09-25 15:10:54 +01:00
smccc-call.S arm64: smccc: use asm EXPORT_SYMBOL() 2018-12-10 11:50:11 +00:00
smp_spin_table.c
smp.c arm64: mm: Prevent mismatched 52-bit VA support 2018-12-10 18:42:17 +00:00
ssbd.c arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 2018-09-14 17:46:19 +01:00
stacktrace.c arm64: Add stack information to on_accessible_stack 2018-07-26 11:36:07 +01:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys32.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
sys_compat.c signal/arm64: Push siginfo generation into arm64_notify_die 2018-09-27 21:52:54 +02:00
sys.c arm64: implement syscall wrappers 2018-07-12 14:49:48 +01:00
syscall.c arm64: svc: Ensure hardirq tracing is updated before return 2018-07-30 17:43:39 +01:00
time.c arm64: fix unwind_frame() for filtered out fn for function graph tracing 2018-02-23 13:46:38 +00:00
topology.c arm64: topology: re-introduce numa mask check for scheduler MC selection 2018-07-06 13:18:18 +01:00
trace-events-emulation.h
traps.c Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2018-10-24 11:22:39 +01:00
vdso.c
vmlinux.lds.S arm64: relocatable: fix inconsistencies in linker script and options 2018-12-04 12:48:25 +00:00