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linux/arch/x86/kernel
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H. Peter Anvin 5a5a51db78 x86-32: Start out eflags and cr4 clean 
%cr4 is supposed to reflect a set of features into which the operating
system is opting in.  If the BIOS or bootloader leaks bits here, this
is not desirable.  Consider a bootloader passing in %cr4.pae set to a
legacy paging kernel, for example -- it will not have any immediate
effect, but the kernel would crash when turning paging on.

A similar argument applies to %eflags, and since we have to look for
%eflags.id being settable we can use a sequence which clears %eflags
as a side effect.

Note that we already do this for x86-64.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1348529239-17943-1-git-send-email-hpa@linux.intel.com
2012-09-26 15:06:22 -07:00
..
acpi
ACPI/x86: revert 'x86, acpi: Call acpi_enter_sleep_state via an asmlinkage C function from assembler'
2012-07-30 21:10:16 -04:00
apic
x86, apic: fix broken legacy interrupts in the logical apic mode
2012-08-14 09:52:20 -07:00
cpu
Merge branch 'x86/fpu' into x86/smap
2012-09-21 17:18:44 -07:00
.gitignore
…
alternative.c
x86/alternatives: Fix p6 nops on non-modular kernels
2012-08-22 12:09:49 +02:00
amd_gart_64.c
X86 & IA64: adapt for dma_map_ops changes
2012-03-28 16:36:31 +02:00
amd_nb.c
Merge branch 'x86-mce-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-22 16:07:45 -07:00
apb_timer.c
Merge branch 'timers-clocksource-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2011-07-23 10:34:47 -07:00
aperture_64.c
x86/gart: Fix kmemleak warning
2012-06-06 11:58:38 +02:00
apm_32.c
x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>
2012-06-06 09:17:22 +02:00
asm-offsets_32.c
x86: Generate system call tables and unistd_*.h from tables
2011-11-17 13:35:37 -08:00
asm-offsets_64.c
x32: If configured, add x32 system calls to system call tables
2012-02-20 12:52:06 -08:00
asm-offsets.c
x86, efi: EFI boot stub support
2011-12-12 14:26:10 -08:00
audit_64.c
…
bootflag.c
…
check.c
x86: kernel/check.c simple_strtoul cleanup
2012-05-15 15:36:41 -07:00
cpuid.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
crash_dump_32.c
x86: remove the second argument of k[un]map_atomic()
2012-03-20 21:48:15 +08:00
crash_dump_64.c
crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn
2011-03-23 19:47:19 -07:00
crash.c
x86, nmi: Wire up NMI handlers to new routines
2011-10-10 06:56:57 +02:00
devicetree.c
irq_domain/x86: Convert x86 (embedded) to use common irq_domain
2012-02-23 14:37:47 -07:00
doublefault_32.c
…
dumpstack_32.c
x86: Move call to print_modules() out of show_regs()
2012-06-20 14:33:48 +02:00
dumpstack_64.c
x86: Move call to print_modules() out of show_regs()
2012-06-20 14:33:48 +02:00
dumpstack.c
x86: Move call to print_modules() out of show_regs()
2012-06-20 14:33:48 +02:00
e820.c
firmware_map: make firmware_map_add_early() argument consistent with firmware_map_add_hotplug()
2012-07-30 17:25:17 -07:00
early_printk.c
Revert "x86/early_printk: Replace obsolete simple_strtoul() usage with kstrtoint()"
2012-07-22 15:47:52 +02:00
early-quirks.c
x86, quirk: Fix SB600 revision check
2011-03-16 14:03:32 +01:00
entry_32.S
x86-32, smap: Add STAC/CLAC instructions to 32-bit kernel entry
2012-09-21 14:04:27 -07:00
entry_64.S
x86, smap: Add STAC and CLAC instructions to control user space access
2012-09-21 12:45:27 -07:00
ftrace.c
ftrace: Use breakpoint method to update ftrace caller
2012-05-31 23:12:19 -04:00
head32.c
x86, realmode: Move ACPI wakeup to unified realmode code
2012-05-08 11:46:05 -07:00
head64.c
x86, realmode: Move ACPI wakeup to unified realmode code
2012-05-08 11:46:05 -07:00
head_32.S
x86-32: Start out eflags and cr4 clean
2012-09-26 15:06:22 -07:00
head_64.S
Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-05-29 20:14:53 -07:00
head.c
memblock, x86: Replace memblock_x86_reserve/free_range() with generic ones
2011-07-14 11:47:53 -07:00
hpet.c
x86: hpet: Fix copy-and-paste mistake in earlier change
2012-05-25 15:32:29 +02:00
hw_breakpoint.c
x86: Use this_cpu_ops to optimize code
2010-12-30 12:20:28 +01:00
i386_ksyms_32.c
…
i387.c
x86, kvm: fix kvm's usage of kernel_fpu_begin/end()
2012-09-21 16:59:04 -07:00
i8237.c
x86: Use syscore_ops instead of sysdev classes and sysdevs
2011-03-23 22:15:54 +01:00
i8253.c
x86: Use common i8253 clockevent
2011-07-01 10:37:14 +02:00
i8259.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
io_delay.c
…
ioport.c
x86: Use bitmap library functions
2011-02-17 14:59:22 +01:00
irq_32.c
x86: Use common threadinfo allocator
2012-05-08 14:08:44 +02:00
irq_64.c
x86: Add stack top margin for stack overflow checking
2011-12-07 09:27:11 +01:00
irq_work.c
irq_work: Add generic hardirq context callbacks
2010-10-18 19:58:50 +02:00
irq.c
x86/fixup_irq: Use cpu_online_mask instead of cpu_all_mask
2012-08-22 10:36:08 +02:00
irqinit.c
x86/tlb: replace INVALIDATE_TLB_VECTOR by CALL_FUNCTION_VECTOR
2012-06-27 19:29:13 -07:00
jump_label.c
jump_label, x86: Fix section mismatch
2011-12-06 20:41:02 +01:00
kdebugfs.c
arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case
2012-07-26 15:07:20 +02:00
kgdb.c
x86: Fix kernel-doc warnings
2012-06-18 10:53:18 +02:00
kprobes-common.h
x86/kprobes: Split out optprobe related code to kprobes-opt.c
2012-03-06 09:49:49 +01:00
kprobes-opt.c
x86/kprobes: Split out optprobe related code to kprobes-opt.c
2012-03-06 09:49:49 +01:00
kprobes.c
x86: Avoid double stack traces with show_regs()
2012-05-09 11:44:42 +02:00
kvm.c
KVM guest: switch to apic_set_eoi_write, apic_write
2012-07-16 12:51:44 +03:00
kvmclock.c
x86: kvmclock: remove check_and_clear_guest_paused warning
2012-06-11 23:18:33 -03:00
ldt.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
machine_kexec_32.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
machine_kexec_64.c
x86, cleanups: Use clear_page/copy_page rather than memset/memcpy
2010-09-22 15:36:49 -07:00
Makefile
Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-05-29 20:14:53 -07:00
microcode_amd.c
x86, microcode, AMD: Fix broken ucode patch size check
2012-08-22 16:10:41 -07:00
microcode_core.c
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-22 12:04:44 -07:00
microcode_intel.c
x86/microcode: Ensure that module is only loaded on supported Intel CPUs
2012-05-07 14:37:14 +02:00
mmconf-fam10h_64.c
x86-64: Fix and clean up AMD Fam10 MMCONF enabling
2010-11-18 13:41:35 +01:00
module.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2012-07-24 13:34:56 -07:00
mpparse.c
Merge branch 'x86-trampoline-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-05-29 20:14:53 -07:00
msr.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
nmi_selftest.c
x86/nmi: Clean up register_nmi_handler() usage
2012-06-20 14:23:17 +02:00
nmi.c
x86: Save cr2 in NMI in case NMIs take a page fault (for i386)
2012-06-08 18:51:12 -04:00
paravirt_patch_32.c
…
paravirt_patch_64.c
…
paravirt-spinlocks.c
…
paravirt.c
x86, pvops: Remove hooks for {rd,wr}msr_safe_regs
2012-06-07 11:41:08 -07:00
pci-calgary_64.c
x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>
2012-06-06 09:17:22 +02:00
pci-dma.c
iommu: Remove group_mf
2012-06-25 13:48:30 +02:00
pci-iommu_table.c
arch/x86/kernel/pci-iommu_table.c: Convert sprintf_symbol to %pS
2011-05-10 10:21:35 +02:00
pci-nommu.c
X86: integrate CMA with DMA-mapping subsystem
2012-05-21 15:09:38 +02:00
pci-swiotlb.c
X86 & IA64: adapt for dma_map_ops changes
2012-03-28 16:36:31 +02:00
pcspeaker.c
…
probe_roms.c
x86/pci/probe_roms: Add missing __iomem annotation to pci_map_biosrom()
2012-09-05 10:52:25 +02:00
process_32.c
x86, fpu: use non-lazy fpu restore for processors supporting xsave
2012-09-18 15:52:11 -07:00
process_64.c
x86, fpu: use non-lazy fpu restore for processors supporting xsave
2012-09-18 15:52:11 -07:00
process.c
x86, fpu: decouple non-lazy/eager fpu restore from xsave
2012-09-18 15:52:22 -07:00
ptrace.c
x86, fpu: Unify signal handling code paths for x86 and x86_64 kernels
2012-09-18 15:51:48 -07:00
pvclock.c
x86/pvclock: Zero last_value on resume
2010-11-28 09:33:20 +01:00
quirks.c
x86/PCI: move fixup hooks from __init to __devinit
2012-06-12 09:10:54 -06:00
reboot_fixups_32.c
x86: Ce4100: Add reboot_fixup() for CE4100
2010-11-12 00:45:41 +01:00
reboot.c
Merge branch 'x86-reboot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-22 12:25:47 -07:00
relocate_kernel_32.S
kexec, x86: Fix incorrect jump back address if not preserving context
2011-07-21 11:19:28 +02:00
relocate_kernel_64.S
kexec, x86: Fix incorrect jump back address if not preserving context
2011-07-21 11:19:28 +02:00
resource.c
x86: avoid high BIOS area when allocating address space
2010-12-17 10:01:30 -08:00
rtc.c
x86/rtc, mrst: Don't register a platform RTC device for for Intel MID platforms
2011-12-05 17:09:21 +01:00
setup_percpu.c
x86: Add read_mostly declaration/definition to variables from smp.h
2012-06-14 12:42:11 +02:00
setup.c
Merge branch 'x86/cleanups' into x86/apic
2012-06-15 14:17:01 +02:00
signal.c
Merge branch 'x86/fpu' into x86/smap
2012-09-21 17:18:44 -07:00
smp.c
x86/reboot: Update nonmi_ipi parameter
2012-05-14 11:49:38 +02:00
smpboot.c
Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-26 13:17:17 -07:00
stacktrace.c
x86: Swap save_stack_trace_regs parameters
2011-06-14 22:48:51 -04:00
step.c
x86-64: Add user_64bit_mode paravirt op
2011-08-04 16:13:49 -07:00
sys_i386_32.c
i386: Make kernel_execve() suitable for stack unwinding
2010-09-03 08:16:02 +02:00
sys_x86_64.c
Merge branch 'x86-x32-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-29 18:12:23 -07:00
syscall_32.c
x86, syscall: Re-fix typo in comment
2011-11-18 16:25:07 -08:00
syscall_64.c
x32: If configured, add x32 system calls to system call tables
2012-02-20 12:52:06 -08:00
tboot.c
x86, realmode: fixes compilation issue in tboot.c
2012-05-08 15:04:27 -07:00
tce_64.c
Disintegrate asm/system.h for X86
2012-03-28 18:11:12 +01:00
test_nx.c
x86: Eliminate various 'set but not used' warnings
2011-05-21 19:10:33 +02:00
test_rodata.c
x86, extable: Remove open-coded exception table entries in arch/x86/kernel/test_rodata.c
2012-04-20 13:51:38 -07:00
time.c
MCA: delete all remaining traces of microchannel bus support.
2012-05-17 19:06:13 -04:00
tls.c
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-03-29 14:28:26 -07:00
tls.h
…
topology.c
x86: Fix files explicitly requiring export.h for EXPORT_SYMBOL/THIS_MODULE
2011-10-31 19:30:35 -04:00
traps.c
x86, fpu: decouple non-lazy/eager fpu restore from xsave
2012-09-18 15:52:22 -07:00
tsc_sync.c
x86/tsc: Reduce the TSC sync check time for core-siblings
2012-02-22 11:49:40 +01:00
tsc.c
x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>
2012-06-06 09:17:22 +02:00
uprobes.c
uprobes: Pass probed vaddr to arch_uprobe_analyze_insn()
2012-06-08 12:22:27 +02:00
verify_cpu.S
x86: Fix common misspellings
2011-03-18 10:39:30 +01:00
vm86_32.c
x86/debug: Add KERN_<LEVEL> to bare printks, convert printks to pr_<level>
2012-06-06 09:17:22 +02:00
vmlinux.lds.S
x86, realmode: Move ACPI wakeup to unified realmode code
2012-05-08 11:46:05 -07:00
vsmp_64.c
x86/apic/x2apic: Limit the vector reservation to the user specified mask
2012-07-06 11:00:22 +02:00
vsyscall_64.c
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2012-07-22 12:04:44 -07:00
vsyscall_emu_64.S
x86-64: Rework vsyscall emulation and add vsyscall= parameter
2011-08-10 19:26:46 -05:00
vsyscall_trace.h
x86-64: Add vsyscall:emulate_vsyscall trace event
2011-08-04 16:13:53 -07:00
x86_init.c
Revert "x86/platform: Add a wallclock_init func to x86_platforms ops"
2012-05-24 23:16:14 +02:00
x8664_ksyms_64.c
x86/copy_user_generic: Optimize copy_user_generic with CPU erms feature
2012-06-29 15:33:34 -07:00
xsave.c
x86, smap: Do not abuse the [f][x]rstor_checking() functions for user space
2012-09-25 15:42:18 -07:00