Peter Zijlstra 1cd5f059d9 x86,static_call: Fix __static_call_return0 for i386 ... Paolo reported that the instruction sequence that is used to replace: call __static_call_return0 namely: 66 66 48 31 c0 data16 data16 xor %rax,%rax decodes to something else on i386, namely: 66 66 48 data16 dec %ax 31 c0 xor %eax,%eax Which is a nonsensical sequence that happens to have the same outcome. *However* an important distinction is that it consists of 2 instructions which is a problem when the thing needs to be overwriten with a regular call instruction again. As such, replace the instruction with something that decodes the same on both i386 and x86_64. Fixes: 3f2a8fc4b1 ("static_call/x86: Add __static_call_return0()") Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20220318204419.GT8939@worktop.programming.kicks-ass.net		2022-04-05 09:59:37 +02:00
..
acpi	Power management updates for 5.18-rc1	2022-03-21 14:26:28 -07:00
apic	bitmap patches for 5.17-rc1	2022-01-23 06:20:44 +02:00
cpu	Driver core changes for 5.18-rc1	2022-03-28 12:41:28 -07:00
fpu	x86/fpu/xstate: Consolidate size calculations	2022-03-30 12:04:09 +02:00
kprobes	x86,kprobes: Fix optprobe trampoline to generate complete pt_regs	2022-03-28 19:38:51 -07:00
.gitignore
alternative.c	Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a	2022-03-27 10:17:23 -07:00
amd_gart_64.c	x86/amd_gart: don't set failed sg dma_address to DMA_MAPPING_ERROR	2021-08-09 17:13:06 +02:00
amd_nb.c	hwmon updates for v5.17	2022-01-11 10:25:36 -08:00
aperture_64.c	proc/vmcore: convert oldmem_pfn_is_ram callback to more generic vmcore callbacks	2021-11-09 10:02:48 -08:00
apm_32.c	x86/ibt: Disable IBT around firmware	2022-03-15 10:32:40 +01:00
asm-offsets.c	um, x86: bury crypto_tfm_ctx_offset	2021-12-21 21:31:35 +01:00
asm-offsets_32.c
asm-offsets_64.c
audit_64.c	audit: add support for the openat2 syscall	2021-10-01 16:52:48 -04:00
bootflag.c
check.c
cpuid.c
crash.c	x86/crash: Remove crash_reserve_low_1M()	2021-06-07 12:14:45 +02:00
crash_core_32.c
crash_core_64.c
crash_dump_32.c
crash_dump_64.c	x86/sev: Replace occurrences of sev_active() with cc_platform_has()	2021-10-04 11:46:58 +02:00
devicetree.c	Devicetree updates for v5.16:	2021-11-02 22:22:13 -07:00
doublefault_32.c	exit/doublefault: Remove apparently bogus comment about rewind_stack_do_exit	2021-10-20 13:09:43 -05:00
dumpstack.c	x86: remove __range_not_ok()	2022-02-25 09:36:05 +01:00
dumpstack_32.c
dumpstack_64.c	x86/mm/64: Improve stack overflow warnings	2021-09-21 13:57:43 +02:00
e820.c	x86/boot: Fix memremap of setup_indirect structures	2022-03-09 12:49:44 +01:00
early-quirks.c	Merge drm/drm-next into drm-intel-next	2022-01-31 13:19:33 -05:00
early_printk.c	usb: early: xhci-dbc: Remove duplicate keep parsing	2022-03-15 18:20:34 +01:00
ebda.c
eisa.c
espfix_64.c
ftrace.c	x86/ibt,ftrace: Make function-graph play nice	2022-03-15 10:32:37 +01:00
ftrace_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
ftrace_64.S	x86/ibt,ftrace: Annotate ftrace code patching	2022-03-15 10:32:41 +01:00
head32.c
head64.c	x86/head64: Add missing __head annotation to sme_postprocess_startup()	2022-02-12 11:37:09 +01:00
head_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
head_64.S	x86/ibt,sev: Annotations	2022-03-15 10:32:41 +01:00
hpet.c	rtc: Check return value from mc146818_get_time()	2021-12-16 21:50:06 +01:00
hw_breakpoint.c
i8237.c
i8253.c
i8259.c	x86: Avoid magic number with ELCR register accesses	2021-08-10 23:31:43 +02:00
idt.c	x86/ibt: Add IBT feature, MSR and #CP handling	2022-03-15 10:32:39 +01:00
io_delay.c
ioport.c
irq.c	x86/irq: Ensure PI wakeup handler is unregistered before module unload	2021-10-22 12:45:35 -04:00
irq_32.c	x86/softirq: Disable softirq stacks on PREEMPT_RT	2021-09-27 12:28:32 +02:00
irq_64.c
irq_work.c
irqflags.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
irqinit.c
itmt.c	x86/sched: Decrease further the priorities of SMT siblings	2021-10-05 15:51:59 +02:00
jailhouse.c
jump_label.c	jump_labels: Mark __jump_label_transform() as __always_inlined to work around aggressive compiler un-inlining	2021-07-13 06:32:05 +02:00
kdebugfs.c	x86/boot: Fix memremap of setup_indirect structures	2022-03-09 12:49:44 +01:00
kexec-bzimage64.c
kgdb.c
ksysfs.c	x86/boot: Fix memremap of setup_indirect structures	2022-03-09 12:49:44 +01:00
kvm.c	* Only do MSR filtering for MSRs accessed by rdmsr/wrmsr	2022-04-02 12:09:02 -07:00
kvmclock.c	x86/kvmclock: Fix Hyper-V Isolated VM's boot issue when vCPUs > 64	2022-02-25 10:09:34 -05:00
ldt.c	memcg: enable accounting for ldt_struct objects	2021-09-03 09:58:13 -07:00
machine_kexec_32.c	x86/kexec: Set_[gi]dt() -> native_[gi]dt_invalidate() in machine_kexec_*.c	2021-05-21 12:36:45 +02:00
machine_kexec_64.c	x86/ibt,kexec: Disable CET on kexec	2022-03-15 10:32:39 +01:00
Makefile	x86,rethook,kprobes: Replace kretprobe with rethook on x86	2022-03-28 19:38:51 -07:00
mmconf-fam10h_64.c	x86/msr: Rename MSR_K8_SYSCFG to MSR_AMD64_SYSCFG	2021-05-10 07:51:38 +02:00
module.c	Add support for Intel CET-IBT, available since Tigerlake (11th gen), which is a	2022-03-27 10:17:23 -07:00
mpparse.c	x86: Avoid magic number with ELCR register accesses	2021-08-10 23:31:43 +02:00
msr.c
nmi.c	x86/nmi: Remove the 'strange power saving mode' hint from unknown NMI handler	2022-03-16 11:02:41 +01:00
nmi_selftest.c
paravirt-spinlocks.c
paravirt.c	x86/ibt,paravirt: Sprinkle ENDBR	2022-03-15 10:32:36 +01:00
pci-dma.c
pci-iommu_table.c
pci-swiotlb.c	x86/sme: Replace occurrences of sme_active() with cc_platform_has()	2021-10-04 11:46:46 +02:00
pcspeaker.c
perf_regs.c
platform-quirks.c
pmem.c
probe_roms.c	x86/pci/probe_roms: Use to_pci_driver() instead of pci_dev->driver	2021-10-18 09:20:15 -05:00
process.c	Merge branch 'x86/cpu' into x86/core, to resolve conflicts	2022-03-15 12:52:51 +01:00
process.h	x86: Snapshot thread flags	2021-12-01 00:06:43 +01:00
process_32.c	x86/fpu: Move context switch and exit to user inlines into sched.h	2021-10-20 15:27:27 +02:00
process_64.c	x86: Remove toolchain check for X32 ABI capability	2022-03-15 10:32:48 +01:00
ptrace.c	ptrace: Cleanups for v5.18	2022-03-28 17:29:53 -07:00
pvclock.c
quirks.c
reboot.c	x86/mm: Flush global TLB when switching to trampoline page-table	2021-12-06 09:54:10 +01:00
reboot_fixups_32.c
relocate_kernel_32.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
relocate_kernel_64.S	x86/ibt: Annotate text references	2022-03-15 10:32:40 +01:00
resource.c	x86/PCI: revert "Ignore E820 reservations for bridge windows on newer systems"	2022-02-09 19:42:58 +01:00
rethook.c	x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs	2022-03-28 19:38:51 -07:00
rtc.c
setup.c	x86/setup: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef	2022-03-23 19:00:34 -07:00
setup_percpu.c	mm: percpu: add generic pcpu_populate_pte() function	2022-01-20 08:52:52 +02:00
sev-shared.c	x86/sev: Shorten GHCB terminate macro names	2021-11-15 20:31:16 +01:00
sev.c	- Add support for decoding instructions which do MMIO accesses in order	2022-01-10 10:00:03 -08:00
sev_verify_cbit.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
signal.c	tracehook: Remove tracehook.h	2022-03-10 16:51:51 -06:00
signal_compat.c	signal: Verify the alignment and size of siginfo_t	2021-07-23 13:15:31 -05:00
smp.c
smpboot.c	x86/ACPI: CPPC: Move init_freq_invariance_cppc() into x86 CPPC	2022-03-08 19:16:43 +01:00
stacktrace.c	x86: remove __range_not_ok()	2022-02-25 09:36:05 +01:00
static_call.c	x86,static_call: Fix __static_call_return0 for i386	2022-04-05 09:59:37 +02:00
step.c
sys_ia32.c
sys_x86_64.c
tboot.c
time.c
tls.c
tls.h
topology.c	drivers/base/node: consolidate node device subsystem initialization in node_dev_init()	2022-03-22 15:57:10 -07:00
trace.c	trace/osnoise: Fix an ifdef comment	2021-10-25 23:02:36 -04:00
trace_clock.c
tracepoint.c
traps.c	Reenable ENQCMD/PASID support:	2022-03-21 12:28:13 -07:00
tsc.c	x86/tsc: Be consistent about use_tsc_delay()	2022-03-15 18:20:33 +01:00
tsc_msr.c
tsc_sync.c	x86/tsc: Add a timer to make sure TSC_adjust is always checked	2021-12-02 00:40:35 +01:00
umip.c	x86/umip: Downgrade warning messages to debug loglevel	2021-09-25 13:23:28 +02:00
unwind_frame.c	x86/unwind: Recover kretprobe trampoline entry	2021-09-30 21:24:07 -04:00
unwind_guess.c	x86/unwind: Recover kretprobe trampoline entry	2021-09-30 21:24:07 -04:00
unwind_orc.c	x86,rethook,kprobes: Replace kretprobe with rethook on x86	2022-03-28 19:38:51 -07:00
uprobes.c
verify_cpu.S	x86: Prepare asm files for straight-line-speculation	2021-12-08 12:25:37 +01:00
vm86_32.c	signal: Replace force_fatal_sig with force_exit_sig when in doubt	2021-11-19 09:15:58 -06:00
vmlinux.lds.S	objtool: Find unused ENDBR instructions	2022-03-15 10:32:47 +01:00
vsmp_64.c
x86_init.c	x86/mm/cpa: Generalize __set_memory_enc_pgtable()	2022-02-23 19:14:29 +01:00