Andy Lutomirski f363938c70 x86/fpu: Fix 'no387' regression ...

After fixing FPU option parsing, we now parse the 'no387' boot option
too early: no387 clears X86_FEATURE_FPU before it's even probed, so
the boot CPU promptly re-enables it.

I suspect it gets even more confused on SMP.

Fix the probing code to leave X86_FEATURE_FPU off if it's been
disabled by setup_clear_cpu_cap().

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Fixes: 4f81cbafcc ("x86/fpu: Fix early FPU command-line parsing")
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2016-03-09 13:54:40 +01:00

..

acpi

PM / sleep / x86: Fix crash on graph trace through x86 suspend

2016-03-03 02:28:28 +01:00

apic

x86/platform/UV: Remove EFI memmap quirk for UV2+

2016-01-19 11:58:56 +01:00

cpu

perf/x86/amd/uncore: Plug reference leak

2016-02-17 08:36:09 +01:00

fpu

x86/fpu: Fix 'no387' regression

2016-03-09 13:54:40 +01:00

kprobes

Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-14 14:37:47 -07:00

.gitignore

…

alternative.c

x86/alternatives: Make optimize_nops() interrupt safe and synced

2015-09-03 21:27:47 +02:00

amd_gart_64.c

…

amd_nb.c

x86/gart: Check for GART support before accessing GART registers

2015-05-06 11:15:53 +02:00

apb_timer.c

x86/asm/tsc: Rename native_read_tsc() to rdtsc()

2015-07-06 15:23:28 +02:00

aperture_64.c

x86/gart: Check for GART support before accessing GART registers

2015-05-06 11:15:53 +02:00

apm_32.c

apm32: Fix cputime == jiffies assumption

2015-07-29 15:44:58 +02:00

asm-offsets_32.c

x86: Remove unused TI_cpu

2015-05-05 20:48:02 +02:00

asm-offsets_64.c

x86/entry, x86/paravirt: Remove the unused usergs_sysret32 PV op

2015-11-23 10:48:16 +01:00

asm-offsets.c

x86/paravirt: Remove the unused irq_enable_sysexit pv op

2015-11-23 10:48:16 +01:00

audit_64.c

x86: hook up execveat system call

2014-12-13 12:42:51 -08:00

bootflag.c

x86: don't use module_init for non-modular core bootflag code

2015-06-16 14:12:34 -04:00

check.c

Merge tag 'v4.2-rc8' into x86/mm, before applying new changes

2015-08-25 09:59:19 +02:00

cpuid.c

new helpers: no_seek_end_llseek{,_size}()

2015-12-23 10:41:31 -05:00

crash_dump_32.c

…

crash_dump_64.c

…

crash.c

perf, x86: Stop Intel PT before kdump starts

2015-11-23 09:58:26 +01:00

devicetree.c

Merge tag 'module_init-device_initcall-v4.1-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2015-07-02 10:30:48 -07:00

doublefault.c

…

dumpstack_32.c

Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-13 13:23:34 -07:00

dumpstack_64.c

x86/kernel: Use kstack_end() in dumpstack_64.c

2015-02-23 18:37:13 +01:00

dumpstack.c

Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-04-13 13:23:34 -07:00

e820.c

x86/e820: Deinline e820_type_to_string, save 126 bytes

2015-09-30 21:54:40 +02:00

early_printk.c

x86/early_printk: Set __iomem address space for IO

2015-10-13 21:45:56 +02:00

early-quirks.c

Merge tag 'v4.4-rc2' into drm-intel-next-queued

2015-11-23 09:04:05 +01:00

espfix_64.c

Merge branch 'x86/urgent' into x86/asm, before applying dependent patches

2015-07-31 10:23:35 +02:00

ftrace.c

x86: ftrace: Fix the comments for ftrace_modify_code_direct()

2016-01-04 18:06:38 -05:00

head32.c

x86: Store a per-cpu shadow copy of CR4

2015-02-04 12:10:42 +01:00

head64.c

x86/platform/intel-mid: Enable 64-bit build

2016-01-19 08:39:56 +01:00

head_32.S

x86/microcode: Merge the early microcode loader

2015-10-21 11:22:12 +02:00

head_64.S

x86/cpu: Call verify_cpu() after having entered long mode too

2015-11-07 10:45:02 +01:00

head.c

…

hpet.c

timers/x86/hpet: Type adjustments

2015-10-21 11:17:32 +02:00

hw_breakpoint.c

x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros

2015-12-19 11:49:55 +01:00

i386_ksyms_32.c

preempt: Use preempt_schedule_context() as the official tracing preemption point

2015-06-07 15:57:42 +02:00

i8237.c

…

i8253.c

clockevents/drivers/i8253: Migrate to new 'set-state' interface

2015-08-10 11:40:30 +02:00

i8259.c

x86/irq: Probe for PIC presence before allocating descs for legacy IRQs

2015-11-07 10:37:37 +01:00

io_delay.c

…

ioport.c

x86/asm/entry: Rename 'init_tss' to 'cpu_tss'

2015-03-06 08:32:58 +01:00

irq_32.c

genirq: Remove irq argument from irq flow handlers

2015-09-16 15:47:51 +02:00

irq_64.c

x86/irq: Drop unlikely before IS_ERR_OR_NULL

2015-10-01 11:08:56 +02:00

irq_work.c

treewide: Remove old email address

2015-11-23 09:44:58 +01:00

irq.c

x86/irq: Call irq_force_move_complete with irq descriptor

2016-01-15 13:44:01 +01:00

irqinit.c

x86/irq: Store irq descriptor in vector array

2015-08-06 00:14:59 +02:00

jump_label.c

jump_label: Rename JUMP_LABEL_{EN,DIS}ABLE to JUMP_LABEL_{JMP,NOP}

2015-08-03 11:34:12 +02:00

kdebugfs.c

…

kexec-bzimage64.c

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2015-09-08 12:41:25 -07:00

kgdb.c

x86/kgdb: Replace bool_int_array[NR_CPUS] with bitmap

2015-09-28 10:13:31 +02:00

ksysfs.c

…

kvm.c

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2015-06-24 09:36:49 -07:00

kvmclock.c

x86/vdso: Remove pvclock fixmap machinery

2015-12-11 08:56:03 +01:00

ldt.c

x86/ldt: Fix small LDT allocation for Xen

2015-09-14 12:10:50 +02:00

livepatch.c

livepatch: Cleanup module page permission changes

2015-12-04 22:51:07 +01:00

machine_kexec_32.c

x86, irq: Move IOAPIC related declarations from hw_irq.h into io_apic.h

2014-12-16 14:08:17 +01:00

machine_kexec_64.c

kexec: move some memembers and definitions within the scope of CONFIG_KEXEC_FILE

2016-01-20 17:09:18 -08:00

Makefile

kexec: split kexec_load syscall from kexec core code

2015-09-10 13:29:01 -07:00

mcount_64.S

x86/ftrace: Add comment on static function tracing

2015-11-19 11:07:49 +01:00

mmconf-fam10h_64.c

…

module.c

x86/mm/KASLR: Propagate KASLR status to kernel proper

2015-04-03 15:26:15 +02:00

mpparse.c

x86: Cleanup irq_domain ops

2015-04-24 15:36:55 +02:00

msr.c

new helpers: no_seek_end_llseek{,_size}()

2015-12-23 10:41:31 -05:00

nmi_selftest.c

…

nmi.c

x86/nmi: Save regs in crash dump on external NMI

2015-12-19 11:07:01 +01:00

paravirt_patch_32.c

x86/paravirt: Remove the unused irq_enable_sysexit pv op

2015-11-23 10:48:16 +01:00

paravirt_patch_64.c

x86/entry, x86/paravirt: Remove the unused usergs_sysret32 PV op

2015-11-23 10:48:16 +01:00

paravirt-spinlocks.c

locking/pvqspinlock: Rename QUEUED_SPINLOCK to QUEUED_SPINLOCKS

2015-05-11 09:52:09 +02:00

paravirt.c

Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-11 16:26:03 -08:00

pci-calgary_64.c

x86/platform/calgary: Constify cal_chipset_ops structures

2015-11-29 08:50:58 +01:00

pci-dma.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

pci-iommu_table.c

…

pci-nommu.c

…

pci-swiotlb.c

x86/mm/64: Enable SWIOTLB if system has SRAT memory regions above MAX_DMA32_PFN

2015-12-06 12:46:31 +01:00

pcspeaker.c

…

perf_regs.c

perf/x86/64: Report regs_user->ax too in get_regs_user()

2015-04-11 13:08:53 +02:00

pmem.c

libnvdimm, e820: skip module loading when no type-12

2015-11-30 09:10:33 -08:00

probe_roms.c

…

process_32.c

sched/core, sched/x86: Kill thread_info::saved_preempt_count

2015-10-06 17:08:18 +02:00

process_64.c

x86/LDT: Print the real LDT base address

2015-12-29 12:34:38 +01:00

process.c

x86/vm86: Set thread.vm86 to NULL on fork/clone

2015-10-31 09:50:25 +01:00

ptrace.c

arch/x86/kernel/ptrace.c: Remove unused arg_offs_table

2015-12-29 11:35:34 +01:00

pvclock.c

x86/vdso: Remove pvclock fixmap machinery

2015-12-11 08:56:03 +01:00

quirks.c

timers/x86/hpet: Type adjustments

2015-10-21 11:17:32 +02:00

reboot_fixups_32.c

…

reboot.c

x86/reboot/quirks: Add iMac10,1 to pci_reboot_dmi_table[]

2016-01-12 12:27:36 +01:00

relocate_kernel_32.S

x86/asm: Optimize unnecessarily wide TEST instructions

2015-03-07 11:12:43 +01:00

relocate_kernel_64.S

x86/asm: Replace "MOVQ $imm, %reg" with MOVL

2015-04-01 13:17:39 +02:00

resource.c

x86: don't exclude low BIOS area when allocating address space for non-PCI cards

2014-07-16 12:29:36 -06:00

rtc.c

x86/paravirt: Prevent rtc_cmos platform device init on PV guests

2015-12-19 21:35:13 +01:00

setup_percpu.c

x86: Convert a few more per-CPU items to read-mostly ones

2014-11-04 20:13:28 +01:00

setup.c

Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-01-11 17:16:01 -08:00

signal_compat.c

x86/compat: Move copy_siginfo_*_user32() to signal_compat.c

2015-07-06 15:28:55 +02:00

signal.c

x86/signal: Fix restart_syscall number for x32 tasks

2015-12-05 18:52:14 +01:00

smp.c

x86/smp: Remove single IPI wrapper

2015-11-05 13:07:54 +01:00

smpboot.c

x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros

2015-12-19 11:49:55 +01:00

stacktrace.c

…

step.c

Merge branch 'x86/urgent' into x86/asm to fix up conflicts and to pick up fixes

2015-08-18 09:39:47 +02:00

sys_x86_64.c

x86/mm: Improve AMD Bulldozer ASLR workaround

2015-03-31 10:01:17 +02:00

sysfb_efi.c

…

sysfb_simplefb.c

x86/simplefb: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -07:00

sysfb.c

x86/sysfb: Use PTR_ERR_OR_ZERO

2014-10-17 13:40:52 -07:00

tboot.c

…

tce_64.c

…

test_nx.c

…

test_rodata.c

treewide: Fix typo in printk messages

2015-03-06 23:05:39 +01:00

time.c

x86/asm/entry: Change all 'user_mode_vm()' calls to 'user_mode()'

2015-03-23 11:14:17 +01:00

tls.c

x86, tls: Interpret an all-zero struct user_desc as "no segment"

2015-01-22 21:45:07 +01:00

tls.h

…

topology.c

x86: Drop bogus __ref / __refdata annotations

2015-07-20 18:57:20 +02:00

trace_clock.c

x86/asm/tsc: Add rdtsc_ordered() and use it in trivial call sites

2015-07-06 15:23:29 +02:00

tracepoint.c

…

traps.c

x86/fpu/mpx: Rework MPX 'xstate' types

2015-09-14 12:22:00 +02:00

tsc_msr.c

…

tsc_sync.c

x86/asm/tsc/sync: Use rdtsc_ordered() in check_tsc_warp() and drop extra barriers

2015-07-06 15:23:29 +02:00

tsc.c

x86/tsc: Remove unused tsc_pre_init() hook

2015-11-19 11:03:13 +01:00

uprobes.c

uprobes/x86: Make arch_uretprobe_is_alive(RP_CHECK_CALL) more clever

2015-07-31 10:38:06 +02:00

verify_cpu.S

x86/boot: Hide local labels in verify_cpu()

2016-01-12 11:54:32 +01:00

vm86_32.c

thp: rename split_huge_page_pmd() to split_huge_pmd()

2016-01-15 17:56:32 -08:00

vmlinux.lds.S

kexec: split kexec_load syscall from kexec core code

2015-09-10 13:29:01 -07:00

vsmp_64.c

x86: replace __init_or_module with __init in non-modular vsmp_64.c

2015-06-16 14:12:41 -04:00

x86_init.c

x86/tsc: Remove unused tsc_pre_init() hook

2015-11-19 11:03:13 +01:00

x8664_ksyms_64.c

preempt: Use preempt_schedule_context() as the official tracing preemption point

2015-06-07 15:57:42 +02:00