Ksawlii/kernel_samsung_a53x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
kernel_samsung_a53x/arch/arm64/kernel
History
Will Deacon ec42f84826 arm64: tls: Fix context-switching of tpidrro_el0 when kpti is enabled 
commit 67ab51cbdfee02ef07fb9d7d14cc0bf6cb5a5e5c upstream.

Commit 18011eac28c7 ("arm64: tls: Avoid unconditional zeroing of
tpidrro_el0 for native tasks") tried to optimise the context switching
of tpidrro_el0 by eliding the clearing of the register when switching
to a native task with kpti enabled, on the erroneous assumption that
the kpti trampoline entry code would already have taken care of the
write.

Although the kpti trampoline does zero the register on entry from a
native task, the check in tls_thread_switch() is on the *next* task and
so we can end up leaving a stale, non-zero value in the register if the
previous task was 32-bit.

Drop the broken optimisation and zero tpidrro_el0 unconditionally when
switching to a native 64-bit task.

Cc: Mark Rutland <mark.rutland@arm.com>
Cc: stable@vger.kernel.org
Fixes: 18011eac28c7 ("arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native tasks")
Signed-off-by: Will Deacon <will@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20241114095332.23391-1-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-12-17 13:24:19 +01:00
..
probes Revert "arm64: probes: Remove broken LDR (literal) uprobe support" 2024-11-24 00:22:53 +01:00
vdso Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso32 Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
acpi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
acpi_numa.c Revert "arm64: acpi: Move get_cpu_for_acpi_id() to a header" 2024-11-24 00:23:36 +01:00
acpi_parking_protocol.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
alternative.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
armv8_deprecated.c arm64: armv8_deprecated: fix unused-function error 2024-11-08 11:26:06 +01:00
asm-offsets.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cacheinfo.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpu-reset.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpu-reset.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpu_errata.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpu_ops.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpufeature.c Revert "arm64: cpufeature: Fix the visibility of compat hwcaps" 2024-11-24 00:23:54 +01:00
cpuidle.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cpuinfo.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
crash_core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
crash_dump.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug-monitors.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
efi-entry.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
efi-header.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
efi-rt-wrapper.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
efi.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
entry-common.c arm64: allow kprobes on EL0 handlers 2024-11-08 11:26:02 +01:00
entry-fpsimd.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
entry-ftrace.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
entry.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fpsimd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ftrace.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
head.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hibernate-asm.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hibernate.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hw_breakpoint.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hyp-stub.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
idreg-override.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
image-vars.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
image.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
insn.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
io.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
irq.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
jump_label.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kaslr.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kexec_image.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kgdb.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kuser32.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
machine_kexec.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
machine_kexec_file.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
module-plts.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
module.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mte.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
paravirt.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pci.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf_callchain.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
perf_event.c drivers/perf: pmuv3: don't expose SW_INCR event in sysfs 2024-11-18 12:13:07 +01:00
perf_regs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pointer_auth.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
process.c arm64: tls: Fix context-switching of tpidrro_el0 when kpti is enabled 2024-12-17 13:24:19 +01:00
proton-pack.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
psci.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ptrace.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
reloc_test_core.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
reloc_test_syms.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
relocate_kernel.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
return_address.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sdei.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
setup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
signal.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
signal32.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sigreturn32.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sleep.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
smccc-call.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
smp.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
smp_spin_table.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
stacktrace.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
suspend.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sys.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sys32.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sys_compat.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
syscall.c security: samsung: defex_lsm: nuke 2024-06-15 16:20:49 -03:00
time.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
topology.c arch_topology: Rename freq_scale as arch_freq_scale 2024-11-17 17:45:22 +01:00
trace-events-emulation.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
traps.c arm64: allow kprobes on EL0 handlers 2024-11-08 11:26:02 +01:00
uh_entry.S Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vdso.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmlinux.lds.S arm64: fix .data.rel.ro size assertion when CONFIG_LTO_CLANG 2024-12-17 13:23:59 +01:00