AuxXxilium/linux_dsm_epyc7002
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8ef8f360cf
linux_dsm_epyc7002/arch/arm64/kernel
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Dave Martin 8ef8f360cf arm64: Basic Branch Target Identification support 
This patch adds the bare minimum required to expose the ARMv8.5
Branch Target Identification feature to userspace.

By itself, this does _not_ automatically enable BTI for any initial
executable pages mapped by execve().  This will come later, but for
now it should be possible to enable BTI manually on those pages by
using mprotect() from within the target process.

Other arches already using the generic mman.h are already using
0x10 for arch-specific prot flags, so we use that for PROT_BTI
here.

For consistency, signal handler entry points in BTI guarded pages
are required to be annotated as such, just like any other function.
This blocks a relatively minor attack vector, but comforming
userspace will have the annotations anyway, so we may as well
enforce them.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2020-03-16 17:19:48 +00:00
..
probes arm64: remove __exception annotations 2019-10-28 11:22:38 +00:00
vdso arm64: vdso: Remove stale files from old assembly implementation 2019-10-07 11:07:16 +01:00
vdso32 kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
.gitignore arm64: Build infrastructure 2012-09-17 13:42:21 +01:00
acpi_numa.c acpi: Create subtable parsing infrastructure 2019-04-04 18:41:12 +02:00
acpi_parking_protocol.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
acpi.c arm64: acpi: fix DAIF manipulation with pNMI 2020-01-22 14:41:22 +00:00
alternative.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
armv8_deprecated.c arm64: armv8_deprecated: update the comments of armv8_deprecated_init() 2020-01-08 17:29:41 +00:00
asm-offsets.c arm64: asm-offsets: add S_FP 2019-11-06 14:17:34 +00:00
cacheinfo.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
cpu_errata.c Merge branch 'for-next/errata' into for-next/core 2020-01-22 11:35:05 +00:00
cpu_ops.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
cpu-reset.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpu-reset.S arm64: kernel: avoid x18 in __cpu_soft_restart 2020-01-16 17:32:56 +00:00
cpufeature.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
cpuidle.c PSCI: cpuidle: Refactor CPU suspend power_state parameter handling 2019-08-09 17:51:39 +01:00
cpuinfo.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
debug-monitors.c arm64: Remove unneeded rcu_read_lock from debug handlers 2019-08-01 15:00:27 +01:00
efi-entry.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
efi-header.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
efi-rt-wrapper.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
efi.c mm/pgtable: drop pgtable_t variable from pte_fn_t functions 2019-07-12 11:05:46 -07:00
entry-common.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
entry-fpsimd.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
entry-ftrace.S arm64: ftrace: fix ifdeffery 2019-12-06 13:25:14 +00:00
entry.S Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2020-01-28 10:07:09 -08:00
fpsimd.c arm64: nofpsmid: Handle TIF_FOREIGN_FPSTATE flag cleanly 2020-01-14 17:11:53 +00:00
ftrace.c arm64: ftrace: minimize ifdeffery 2019-11-06 14:17:36 +00:00
head.S Merge branches 'for-next/52-bit-kva', 'for-next/cpu-topology', 'for-next/error-injection', 'for-next/perf', 'for-next/psci-cpuidle', 'for-next/rng', 'for-next/smpboot', 'for-next/tbi' and 'for-next/tlbi' into for-next/core 2019-08-30 12:46:12 +01:00
hibernate-asm.S arm64: mm: Logic to make offset_ttbr1 conditional 2019-08-09 11:17:24 +01:00
hibernate.c arm64: hibernate: add trans_pgd public functions 2020-01-08 16:55:12 +00:00
hw_breakpoint.c Printk changes for 5.5 2019-11-25 19:40:40 -08:00
hyp-stub.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
image-vars.h arm64/efi: Move variable assignments after SECTIONS 2019-08-14 17:18:15 +01:00
image.h arm64/efi: Move variable assignments after SECTIONS 2019-08-14 17:18:15 +01:00
insn.c arm64: insn: consistently handle exit text 2019-12-04 11:32:20 +00:00
io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
irq.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
jump_label.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kaslr.c arm64: Fix CONFIG_ARCH_RANDOM=n build 2020-02-11 09:47:01 +00:00
kexec_image.c arm64: kexec_file: add crash dump support 2020-01-08 17:05:23 +00:00
kgdb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kuser32.S docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
machine_kexec_file.c arm64: kexec_file: add crash dump support 2020-01-08 17:05:23 +00:00
machine_kexec.c Revert "arm64: kexec: make dtb_mem always enabled" 2020-01-10 16:00:50 +00:00
Makefile arm64: entry: convert el1_sync to C 2019-10-28 11:22:47 +00:00
module-plts.c arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
module.c arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
module.lds arm64: ftrace: emit ftrace-mod.o contents through code 2017-12-01 13:04:59 +00:00
paravirt.c arm64: Retrieve stolen time as paravirtualized guest 2019-10-21 19:20:31 +01:00
pci.c pci-v5.3-changes 2019-07-15 20:44:49 -07:00
perf_callchain.c arm64: stacktrace: Factor out backtrace initialisation 2019-07-22 11:44:08 +01:00
perf_event.c arm64: perf: Simplify the ARMv8 PMUv3 event attributes 2019-11-01 14:51:19 +00:00
perf_regs.c compat: Move compat_timespec/ timeval to compat_time.h 2018-04-19 13:29:54 +02:00
pointer_auth.c arm64: ptr auth: Move per-thread keys from thread_info to thread_struct 2018-12-13 16:42:47 +00:00
process.c arm64: ssbs: Fix context-switch when SSBS is present on all CPUs 2020-02-10 11:29:02 +00:00
psci.c arm64: psci: Reduce the waiting time for cpu_psci_cpu_kill() 2019-10-25 16:29:11 +01:00
ptrace.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
reloc_test_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
reloc_test_syms.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
relocate_kernel.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
return_address.c arm64: unwind: Prohibit probing on return_address() 2019-08-01 15:00:26 +01:00
sdei.c firmware: arm_sdei: use common SMCCC_CONDUIT_* 2019-10-14 10:55:14 +01:00
setup.c TTY/Serial driver updates for 5.6-rc1 2020-01-29 10:13:27 -08:00
signal32.c arm64: signal: nofpsimd: Handle fp/simd context for signal frames 2020-01-14 17:11:46 +00:00
signal.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
sigreturn32.S arm64: compat: Split kuser32 2019-04-23 18:01:57 +01:00
sleep.S arm64: kernel: use aff3 instead of aff2 in comment 2019-06-04 14:51:01 +01:00
smccc-call.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
smp_spin_table.c arm64: prefer __section from compiler_attributes.h 2019-08-13 18:32:15 +01:00
smp.c arm64 updates for 5.5: 2019-12-06 14:18:01 -08:00
ssbd.c Return ENODEV when the selected speculation misfeature is unsupported 2020-01-08 17:27:41 +00:00
stacktrace.c arm64: unwind: Prohibit probing on return_address() 2019-08-01 15:00:26 +01:00
suspend.c arm64: mm: Support Common Not Private translations 2018-09-18 12:02:27 +01:00
sys32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452 2019-06-19 17:09:08 +02:00
sys_compat.c arm64: Silence clang warning on mismatched value/register sizes 2019-10-28 09:13:21 +00:00
sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
syscall.c arm64: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
time.c arm64: time: Replace <linux/clk-provider.h> by <linux/of_clk.h> 2020-02-12 17:26:38 +00:00
topology.c Merge tag 'common/for-v5.4-rc1/cpu-topology' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux into for-next/cpu-topology 2019-08-14 10:07:00 +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: Basic Branch Target Identification support 2020-03-16 17:19:48 +00:00
vdso.c arm64: compat: VDSO setup for compat layer 2019-06-22 21:21:08 +02:00
vmlinux.lds.S arm64 updates for 5.5: 2019-12-06 14:18:01 -08:00