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linux_dsm_epyc7002/arch/x86/include/asm
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Dave Hansen 33a709b25a mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys 
Today, for normal faults and page table walks, we check the VMA
and/or PTE to ensure that it is compatible with the action.  For
instance, if we get a write fault on a non-writeable VMA, we
SIGSEGV.

We try to do the same thing for protection keys.  Basically, we
try to make sure that if a user does this:

	mprotect(ptr, size, PROT_NONE);
	*ptr = foo;

they see the same effects with protection keys when they do this:

	mprotect(ptr, size, PROT_READ|PROT_WRITE);
	set_pkey(ptr, size, 4);
	wrpkru(0xffffff3f); // access disable pkey 4
	*ptr = foo;

The state to do that checking is in the VMA, but we also
sometimes have to do it on the page tables only, like when doing
a get_user_pages_fast() where we have no VMA.

We add two functions and expose them to generic code:

	arch_pte_access_permitted(pte_flags, write)
	arch_vma_access_permitted(vma, write)

These are, of course, backed up in x86 arch code with checks
against the PTE or VMA's protection key.

But, there are also cases where we do not want to respect
protection keys.  When we ptrace(), for instance, we do not want
to apply the tracer's PKRU permissions to the PTEs from the
process being traced.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave@sr71.net>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
Cc: Dominik Vogt <vogt@linux.vnet.ibm.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Low <jason.low2@hp.com>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Shachar Raindel <raindel@mellanox.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: linux-arch@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-s390@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/20160212210219.14D5D715@viggo.jf.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-18 09:32:44 +01:00
..
crypto
fpu x86/fpu, x86/mm/pkeys: Add PKRU xsave fields and data structures 2016-02-16 10:11:14 +01:00
numachip x86/numachip: Introduce Numachip2 timer mechanisms 2015-09-22 22:25:33 +02:00
trace x86/fpu/mpx: Rework MPX 'xstate' types 2015-09-14 12:22:00 +02:00
uv x86/platform/uv: Insert per_cpu accessor function on uv_hub_nmi 2015-09-13 09:27:53 +02:00
xen xen: rename dom0_op to platform_op 2015-12-21 14:40:55 +00:00
a.out-core.h
acenv.h
acpi.h acpi, x86: Implement arch_apei_get_mem_attributes() 2015-08-08 10:37:39 +02:00
agp.h
alternative-asm.h
alternative.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
amd_nb.h x86/amd_nb, EDAC: Rename amd_get_node_id() 2015-10-21 11:10:55 +02:00
apb_timer.h
apic_flat_64.h
apic.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
apicdef.h
apm.h
arch_hweight.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
archrandom.h
asm-offsets.h
asm.h
atomic64_32.h x86/headers: Don't include asm/processor.h in asm/atomic.h 2015-12-06 12:56:03 +01:00
atomic64_64.h atomic, arch: Audit atomic_{read,set}() 2015-09-23 09:54:28 +02:00
atomic.h x86/headers: Don't include asm/processor.h in asm/atomic.h 2015-12-06 12:56:03 +01:00
barrier.h x86: define __smp_xxx 2016-01-12 20:46:59 +02:00
bios_ebda.h
bitops.h x86/asm/bitops: Force inlining of test_and_set_bit and friends 2016-02-09 10:31:54 +01:00
boot.h x86/boot: Double BOOT_HEAP_SIZE to 64KB 2016-01-11 12:30:50 +01:00
bootparam_utils.h
bug.h
bugs.h
cache.h
cacheflush.h nd_blk: change aperture mapping from WC to WB 2015-08-27 19:38:28 -04:00
calgary.h x86/platform/calgary: Constify cal_chipset_ops structures 2015-11-29 08:50:58 +01:00
ce4100.h
checksum_32.h
checksum_64.h
checksum.h
clocksource.h x86/vdso: Disallow vvar access to vclock IO for never-used vclocks 2016-01-12 11:59:35 +01:00
cmdline.h
cmpxchg_32.h x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2015-12-19 11:49:55 +01:00
cmpxchg_64.h x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2015-12-19 11:49:55 +01:00
cmpxchg.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
compat.h
cpu_device_id.h
cpu.h x86/cpu: Unify CPU family, model, stepping calculation 2015-11-24 09:15:54 +01:00
cpufeature.h x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions 2016-02-16 10:11:13 +01:00
cpufeatures.h x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions 2016-02-16 10:11:13 +01:00
cpumask.h
crash.h
current.h
debugreg.h
delay.h x86/asm/delay: Introduce an MWAITX-based delay with a configurable timer 2015-08-22 14:52:16 +02:00
desc_defs.h
desc.h x86/ldt: Make modify_ldt synchronous 2015-07-31 10:23:23 +02:00
device.h x86/PCI: Allow DMA ops specific to a PCI domain 2016-01-15 13:54:55 -06:00
disabled-features.h x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions 2016-02-16 10:11:13 +01:00
div64.h
dma-mapping.h dma-mapping: always provide the dma_map_ops based implementation 2016-01-20 17:09:18 -08:00
dma.h
dmi.h x86/dmi: Switch dmi_remap() from ioremap() [uncached] to ioremap_cache() 2016-02-09 14:36:43 +01:00
dwarf2.h x86/asm: Remove the xyz_cfi macros from dwarf2.h 2015-10-14 16:56:28 +02:00
e820.h
edac.h
efi.h * Make the EFI System Resource Table (ESRT) driver explicitly 2015-10-14 16:51:34 +02:00
elf.h x86/elf/64: Clear more registers in elf_common_init() 2015-10-09 09:41:06 +02:00
emergency-restart.h
entry_arch.h
espfix.h x86/espfix: Add 'cpu' parameter to init_espfix_ap() 2015-07-06 15:00:33 +02:00
exec.h
fb.h
fixmap.h x86/mm: Make kmap_prot into a #define 2016-01-20 11:39:14 +01:00
floppy.h
frame.h x86/asm: Add C versions of frame pointer macros 2016-01-19 12:59:07 +01:00
ftrace.h ftrace: Format MCOUNT_ADDR address as type unsigned long 2015-07-20 22:30:53 -04:00
futex.h
gart.h
genapic.h
geode.h
gpio.h
hardirq.h
highmem.h kmap_atomic_to_page() has no users, remove it 2015-11-09 15:11:24 -08:00
hpet.h timers/x86/hpet: Type adjustments 2015-10-21 11:17:32 +02:00
hugetlb.h mm/hugetlb: remove arch_prepare/release_hugepage from arch headers 2015-06-25 17:00:35 -07:00
hw_breakpoint.h
hw_irq.h x86/PCI: Add driver for Intel Volume Management Device (VMD) 2016-01-15 13:54:55 -06:00
hypertransport.h
hypervisor.h
i8259.h x86/irq: Probe for PIC presence before allocating descs for legacy IRQs 2015-11-07 10:37:37 +01:00
ia32_unistd.h
ia32.h x86/headers: Remove <asm/sigcontext.h> references on the kernel side 2015-09-08 10:06:05 +02:00
idle.h
imr.h
inat_types.h
inat.h
init.h
insn.h
inst.h
intel_mid_vrtc.h
intel_pmc_ipc.h intel_pmc_ipc: Update kerneldoc formatting 2015-07-09 11:23:15 -07:00
intel_pt.h perf/x86/intel/pt: Add interface to stop Intel PT logging 2015-11-23 09:58:26 +01:00
intel_punit_ipc.h platform:x86: add Intel P-Unit mailbox IPC driver 2016-01-19 15:49:36 -08:00
intel_scu_ipc.h
intel_telemetry.h platform/x86: Add Intel Telemetry Core Driver 2016-01-19 17:35:50 -08:00
intel-mid.h
io_apic.h
io.h libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
iomap.h
iommu_table.h
iommu.h
iosf_mbi.h ACPI / LPSS: override power state for LPSS DMA device 2016-01-07 14:11:32 +01:00
ipi.h x86/apic: Provide default send single IPI wrapper 2015-11-05 13:07:53 +01:00
irq_regs.h
irq_remapping.h irq_remapping: move structs outside #ifdef 2015-10-01 15:06:42 +02:00
irq_vectors.h x86/vm86: Move the vm86 IRQ definitions to vm86.h 2015-07-31 13:31:10 +02:00
irq_work.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
irq.h x86/irq: Call irq_force_move_complete with irq descriptor 2016-01-15 13:44:01 +01:00
irqdomain.h
irqflags.h
ist.h
jump_label.h x86/asm: Add asm macros for static keys/jump labels 2015-11-24 09:56:44 +01:00
kasan.h x86/kasan: Define KASAN_SHADOW_OFFSET per architecture 2015-08-22 14:54:55 +02:00
kbdleds.h
Kbuild mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
kdebug.h x86/kexec: Remove obsolete 'in_crash_kexec' flag 2015-10-12 09:43:11 +02:00
kexec-bzimage64.h
kexec.h
kgdb.h
kmap_types.h
kmemcheck.h
kprobes.h
kvm_emulate.h KVM: x86: add read_phys to x86_emulate_ops 2015-11-04 16:24:31 +01:00
kvm_guest.h
kvm_host.h KVM: move architecture-dependent requests to arch/ 2016-01-08 19:04:36 +01:00
kvm_para.h
lguest_hcall.h
lguest.h lguest: Map switcher text R/O 2016-01-12 12:17:28 +01:00
linkage.h
livepatch.h
local64.h
local.h
mach_timer.h
mach_traps.h
math_emu.h x86/vm86: Clean up vm86.h includes 2015-07-31 13:31:10 +02:00
mc146818rtc.h
mce.h x86/mce: Add a Scalable MCA vendor flags bit 2015-11-01 11:26:13 +01:00
microcode_amd.h x86/microcode: Merge the early microcode loader 2015-10-21 11:22:12 +02:00
microcode_intel.h x86/microcode: Merge the early microcode loader 2015-10-21 11:22:12 +02:00
microcode.h x86/cpu: Unify CPU family, model, stepping calculation 2015-11-24 09:15:54 +01:00
misc.h
mmconfig.h
mmu_context.h mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys 2016-02-18 09:32:44 +01:00
mmu.h x86/vdso: Track each mm's loaded vDSO image as well as its base 2016-01-12 11:59:34 +01:00
mmx.h
mmzone_32.h
mmzone_64.h
mmzone.h
module.h
mpspec_def.h
mpspec.h
mpx.h
mshyperv.h mshyperv: fix recognition of Hyper-V guest crash MSR's 2015-08-04 22:30:44 -07:00
msi.h x86/irq: Export functions to allow MSI domains in modules 2015-12-20 12:40:49 +01:00
msidef.h
msr-index.h x86/cpu/amd, kvm: Satisfy guest kernel reads of IC_CFG MSR 2015-11-24 09:15:54 +01:00
msr-trace.h x86, tracing, perf: Add trace point for MSR accesses 2015-12-06 12:56:10 +01:00
msr.h Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 17:45:32 -08:00
mtrr.h
mutex_32.h
mutex_64.h
mutex.h
mwait.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
nmi.h
nops.h
numa_32.h
numa.h
olpc_ofw.h
olpc.h
page_32_types.h
page_32.h
page_64_types.h x86/asm: Move PUD_PAGE macros to page_types.h 2015-09-22 21:27:32 +02:00
page_64.h
page_types.h x86/mm: Align macro defines 2015-12-19 11:53:40 +01:00
page.h
paravirt_types.h 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
paravirt.h 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
parport.h
pat.h
pci_64.h
pci_x86.h x86/PCI: Clarify AMD Fam10h config access restrictions comment 2015-12-10 19:38:06 -06:00
pci-direct.h
pci-functions.h
pci.h Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block 2015-06-25 15:22:36 -07:00
percpu.h
perf_event_p4.h
perf_event.h x86: Add new MSRs and MSR bits used for Intel Skylake PMU support 2015-08-04 10:16:56 +02:00
pgalloc.h
pgtable_32_types.h
pgtable_32.h
pgtable_64_types.h
pgtable_64.h
pgtable_types.h x86/mm/pkeys: Fill in pkey field in siginfo 2016-02-18 09:32:43 +01:00
pgtable-2level_types.h
pgtable-2level.h
pgtable-3level_types.h
pgtable-3level.h
pgtable.h mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys 2016-02-18 09:32:44 +01:00
platform_sst_audio.h ASoc: Intel: Atom: add deep buffer definitions for atom platforms 2015-12-19 11:49:56 +00:00
pm-trace.h
pmc_atom.h x86/platform/intel/pmc_atom: Add Cherrytrail PMC interface 2015-07-06 18:39:38 +02:00
pmem.h pmem: add wb_cache_pmem() to the PMEM API 2016-01-22 17:02:18 -08:00
posix_types.h
preempt.h sched/core, sched/x86: Kill thread_info::saved_preempt_count 2015-10-06 17:08:18 +02:00
probe_roms.h
processor-cyrix.h
processor-flags.h
processor.h Merge branches 'x86/fpu', 'x86/mm' and 'x86/asm' into x86/pkeys 2016-02-16 09:37:37 +01:00
prom.h
proto.h
ptrace.h x86/entry: Remove do_notify_resume(), syscall_trace_leave(), and their TIF masks 2015-08-05 10:54:35 +02:00
pvclock-abi.h Revert "KVM: x86: zero kvmclock_offset when vcpu0 initializes kvmclock system MSR" 2015-09-28 13:06:37 +02:00
pvclock.h x86/vsdo: Fix build on PARAVIRT_CLOCK=y, KVM_GUEST=n 2016-01-06 10:49:53 +01:00
qrwlock.h locking/qrwlock: Implement queue_write_unlock() using smp_store_release() 2015-08-12 11:59:05 +02:00
qspinlock_paravirt.h locking/pvqspinlock, x86: Optimize the PV unlock code path 2015-11-23 10:02:02 +01:00
qspinlock.h locking/qspinlock/x86: Only emit the test-and-set fallback when building guest support 2015-09-11 07:50:12 +02:00
realmode.h
reboot_fixups.h
reboot.h x86/nmi: Save regs in crash dump on external NMI 2015-12-19 11:07:01 +01:00
required-features.h x86/cpufeature, x86/mm/pkeys: Add protection keys related CPUID definitions 2016-02-16 10:11:13 +01:00
rio.h
rmwcc.h
rtc.h
rwsem.h
seccomp.h
sections.h
segment.h
serial.h
setup_arch.h
setup.h
shmparam.h
sigcontext.h x86/headers: Remove <asm/sigcontext.h> references on the kernel side 2015-09-08 10:06:05 +02:00
sigframe.h x86/headers: Remove <asm/sigcontext.h> references on the kernel side 2015-09-08 10:06:05 +02:00
sighandling.h
signal.h x86/headers: Remove <asm/sigcontext.h> references on the kernel side 2015-09-08 10:06:05 +02:00
simd.h
smap.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
smp.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
sparsemem.h
special_insns.h x86/mm/pkeys: Add functions to fetch PKRU 2016-02-18 09:32:43 +01:00
spinlock_types.h
spinlock.h
sta2x11.h
stackprotector.h x86/asm/tsc: Rename native_read_tsc() to rdtsc() 2015-07-06 15:23:28 +02:00
stacktrace.h
string_32.h
string_64.h x86, kasan: Fix build failure on KASAN=y && KMEMCHECK=y kernels 2015-10-19 10:07:23 +02:00
string.h
suspend_32.h x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume 2015-11-26 10:04:53 +01:00
suspend_64.h x86/pm: Introduce quirk framework to save/restore extra MSR registers around suspend/resume 2015-11-26 10:04:53 +01:00
suspend.h
svm.h
swiotlb.h
switch_to.h x86/sched/64: Don't save flags on context switch (reinstated) 2015-09-25 09:29:17 +02:00
sync_bitops.h
sys_ia32.h
syscall.h x86/syscalls: Give sys_call_ptr_t a useful type 2015-10-09 09:41:08 +02:00
syscalls.h x86/vm86: Clean up vm86.h includes 2015-07-31 13:31:10 +02:00
sysfb.h
tce.h
thread_info.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
time.h
timer.h
timex.h
tlb.h
tlbflush.h Merge branches 'x86/fpu', 'x86/mm' and 'x86/asm' into x86/pkeys 2016-02-16 09:37:37 +01:00
topology.h Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-06-22 17:59:09 -07:00
trace_clock.h
traps.h x86/entry: Remove exception_enter() from most trap handlers 2015-07-07 10:59:09 +02:00
tsc.h Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-01 08:40:25 -07:00
uaccess_32.h Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-06-22 17:59:09 -07:00
uaccess_64.h x86/cpufeature: Carve out X86_FEATURE_* 2016-01-30 11:22:17 +01:00
uaccess.h Merge branch 'uaccess' (batched user access infrastructure) 2016-01-21 13:02:41 -08:00
unaligned.h
unistd.h
uprobes.h
user32.h
user_32.h
user_64.h
user.h
vdso.h x86/vdso: Use .fault for the vDSO text mapping 2016-01-12 11:59:34 +01:00
vga.h
vgtod.h x86/vdso: Disallow vvar access to vclock IO for never-used vclocks 2016-01-12 11:59:35 +01:00
virtext.h
vm86.h x86/vm86: Rename vm86->v86flags and v86mask 2015-07-31 13:31:11 +02:00
vmx.h KVM: VMX: Enable and initialize VMX TSC scaling 2015-11-10 12:06:19 +01:00
vsyscall.h
vvar.h
word-at-a-time.h
x2apic.h
x86_init.h Merge branch 'linus' into x86/cleanups 2015-12-19 11:49:13 +01:00
xor_32.h x86/cpufeature: Remove unused and seldomly used cpu_has_xx macros 2015-12-19 11:49:55 +01:00
xor_64.h
xor_avx.h
xor.h