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cc55f7537db6af371e9c1c6a71161ee40f918824
android_kernel_xiaomi_sm8450/arch/x86/kernel
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Zhimin Gu cc55f7537d x86, hibernate: Fix nosave_regions setup for hibernation 
On 32bit systems, nosave_regions(non RAM areas) located between
max_low_pfn and max_pfn are not excluded from hibernation snapshot
currently, which may result in a machine check exception when
trying to access these unsafe regions during hibernation:

[  612.800453] Disabling lock debugging due to kernel taint
[  612.805786] mce: [Hardware Error]: CPU 0: Machine Check Exception: 5 Bank 6: fe00000000801136
[  612.814344] mce: [Hardware Error]: RIP !INEXACT! 60:<00000000d90be566> {swsusp_save+0x436/0x560}
[  612.823167] mce: [Hardware Error]: TSC 1f5939fe276 ADDR dd000000 MISC 30e0000086
[  612.830677] mce: [Hardware Error]: PROCESSOR 0:306c3 TIME 1529487426 SOCKET 0 APIC 0 microcode 24
[  612.839581] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[  612.846394] mce: [Hardware Error]: Machine check: Processor context corrupt
[  612.853380] Kernel panic - not syncing: Fatal machine check
[  612.858978] Kernel Offset: 0x18000000 from 0xc1000000 (relocation range: 0xc0000000-0xf7ffdfff)

This is because on 32bit systems, pages above max_low_pfn are regarded
as high memeory, and accessing unsafe pages might cause expected MCE.
On the problematic 32bit system, there are reserved memory above low
memory, which triggered the MCE:

e820 memory mapping:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009d7ff] usable
[    0.000000] BIOS-e820: [mem 0x000000000009d800-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000d160cfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d160d000-0x00000000d1613fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000d1614000-0x00000000d1a44fff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d1a45000-0x00000000d1ecffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d1ed0000-0x00000000d7eeafff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d7eeb000-0x00000000d7ffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d8000000-0x00000000d875ffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d8760000-0x00000000d87fffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000d8800000-0x00000000d8fadfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000d8fae000-0x00000000d8ffffff] ACPI data
[    0.000000] BIOS-e820: [mem 0x00000000d9000000-0x00000000da71bfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000da71c000-0x00000000da7fffff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000da800000-0x00000000dbb8bfff] usable
[    0.000000] BIOS-e820: [mem 0x00000000dbb8c000-0x00000000dbffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000dd000000-0x00000000df1fffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed00000-0x00000000fed03fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000041edfffff] usable

Fix this problem by changing pfn limit from max_low_pfn to max_pfn.
This fix does not impact 64bit system because on 64bit max_low_pfn
is the same as max_pfn.

Signed-off-by: Zhimin Gu <kookoo.gu@intel.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-10-03 11:56:33 +02:00
..
acpi
x86/ACPI/cstate: Make APCI C1 FFH MWAIT C-state description vendor-neutral
2018-08-15 00:19:38 +02:00
apic
x86/apic/vector: Make error return value negative
2018-09-08 12:12:40 +02:00
cpu
x86/microcode: Update the new microcode revision unconditionally
2018-09-02 14:10:54 +02:00
fpu
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
kprobes
kprobes/x86: Fix %p uses in error messages
2018-06-21 17:33:42 +02:00
.gitignore
…
alternative.c
x86/alternatives: Lockdep-enforce text_mutex in text_poke*()
2018-08-30 13:02:30 +02:00
amd_gart_64.c
x86/dma/amd_gart: Use dma_direct_{alloc,free}()
2018-03-20 10:01:57 +01:00
amd_nb.c
x86/amd_nb: Add support for Raven Ridge CPUs
2018-05-13 09:00:27 -07:00
apb_timer.c
…
aperture_64.c
x86/gart: Exclude GART aperture from vmcore
2018-01-11 15:09:24 +01:00
apm_32.c
x86/apm: Don't access __preempt_count with zeroed fs
2018-07-16 17:59:57 +02:00
asm-offsets_32.c
x86/entry/32: Load task stack from x86_tss.sp1 in SYSENTER handler
2018-07-20 01:11:36 +02:00
asm-offsets_64.c
x86/asm-offsets: Move TSS_sp0 and TSS_sp1 to asm-offsets.c
2018-07-20 01:11:35 +02:00
asm-offsets.c
x86/entry/32: Enter the kernel via trampoline stack
2018-07-20 01:11:37 +02:00
audit_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bootflag.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
check.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpuid.c
x86/cpuid: Allow cpuid_read() to schedule
2018-03-27 12:01:48 +02:00
crash_dump_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crash_dump_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crash.c
kexec_file, x86: move re-factored code to generic side
2018-04-13 17:10:27 -07:00
devicetree.c
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-04-02 16:15:32 -07:00
doublefault.c
x86/entry: Fix assumptions that the HW TSS is at the beginning of cpu_tss
2017-12-17 13:59:55 +01:00
dumpstack_32.c
x86/dumpstack: Unify show_regs()
2018-03-08 12:04:59 +01:00
dumpstack_64.c
x86/dumpstack: Unify show_regs()
2018-03-08 12:04:59 +01:00
dumpstack.c
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
2018-09-06 14:33:12 +02:00
e820.c
x86/e820: put !E820_TYPE_RAM regions into memblock.reserved
2018-06-28 11:16:44 -07:00
early_printk.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
early-quirks.c
Merge tag 'drm-intel-next-2018-07-19' of git://anongit.freedesktop.org/drm/drm-intel into drm-next
2018-07-20 12:29:24 +10:00
ebda.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
eisa.c
x86/eisa: Add missing include
2017-08-31 21:34:48 +02:00
espfix_64.c
x86/espfix: Document use of _PAGE_GLOBAL
2018-04-09 18:27:33 +02:00
ftrace_32.S
x86/retpoline/ftrace: Convert ftrace assembler indirect jumps
2018-01-12 00:14:30 +01:00
ftrace_64.S
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-01-28 12:19:23 -08:00
ftrace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
head32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
head64.c
Revert "x86/mm: Mark __pgtable_l5_enabled __initdata"
2018-06-23 14:20:37 +02:00
head_32.S
x86/pgtable/32: Allocate 8k page-tables when PTI is enabled
2018-07-20 01:11:41 +02:00
head_64.S
x86/asm/64: Use 32-bit XOR to zero registers
2018-07-03 09:59:29 +02:00
hpet.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
hw_breakpoint.c
perf/arch/x86: Implement hw_breakpoint_arch_parse()
2018-06-26 09:07:55 +02:00
i8237.c
x86/i8237: Register device based on FADT legacy boot flag
2018-04-27 16:44:29 +02:00
i8253.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
i8259.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
idt.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
io_delay.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ioport.c
x86/ioport: add ksys_ioperm() helper; remove in-kernel calls to sys_ioperm()
2018-04-02 20:16:12 +02:00
irq_32.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
irq_64.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
irq_work.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irq.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
irqflags.S
x86/paravirt: Make native_save_fl() extern inline
2018-07-03 10:56:27 +02:00
irqinit.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
itmt.c
x86/headers: Remove duplicate #includes
2017-12-12 11:32:24 +01:00
jailhouse.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
jump_label.c
x86/alternatives, jumplabel: Use text_poke_early() before mm_init()
2018-07-20 00:02:38 +02:00
kdebugfs.c
x86, mpparse, x86/acpi, x86/PCI, x86/dmi, SFI: Use memremap() for RAM mappings
2017-07-18 11:37:58 +02:00
kexec-bzimage64.c
Fix kexec forbidding kernels signed with keys in the secondary keyring to boot
2018-08-16 09:57:20 -07:00
kgdb.c
…
ksysfs.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
kvm.c
x86/mm: Only use tlb_remove_table() for paravirt
2018-08-23 11:56:31 -07:00
kvmclock.c
Merge branch 'l1tf-final' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-14 09:46:06 -07:00
ldt.c
x86/ldt: Enable LDT user-mapping for PAE
2018-07-20 01:11:48 +02:00
livepatch.c
…
machine_kexec_32.c
x86/kexec: Allocate 8k PGDs for PTI
2018-07-30 13:53:48 +02:00
machine_kexec_64.c
x86/mm: Stop pretending pgtable_l5_enabled is a variable
2018-05-19 11:56:57 +02:00
Makefile
x86/paravirt: Make native_save_fl() extern inline
2018-07-03 10:56:27 +02:00
mmconf-fam10h_64.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.c
x86: Treat R_X86_64_PLT32 as R_X86_64_PC32
2018-02-22 09:01:10 -08:00
mpparse.c
Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-02-14 17:02:15 -08:00
msr.c
…
nmi_selftest.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nmi.c
locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE()
2017-10-25 11:01:08 +02:00
paravirt_patch_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
paravirt_patch_64.c
x86/asm/64: Use 32-bit XOR to zero registers
2018-07-03 09:59:29 +02:00
paravirt-spinlocks.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
paravirt.c
x86/mm: Only use tlb_remove_table() for paravirt
2018-08-23 11:56:31 -07:00
pci-calgary_64.c
x86/dma: Remove dma_alloc_coherent_gfp_flags()
2018-03-20 10:01:58 +01:00
pci-dma.c
Merge tag 'iommu-updates-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
2018-08-24 13:10:38 -07:00
pci-iommu_table.c
x86/iommu: Use NULL instead of 0
2018-08-02 14:33:19 +02:00
pci-swiotlb.c
x86/dma: Use generic swiotlb_ops
2018-03-20 10:01:57 +01:00
pcspeaker.c
x86/platform/pcspeaker: Use PTR_ERR_OR_ZERO() to fix ptr_ret.cocci warning
2018-07-24 09:46:42 +02:00
perf_regs.c
perf/x86: Store user space frame-pointer value on a sample
2018-05-25 08:11:12 +02:00
platform-quirks.c
x86/i8237: Register device based on FADT legacy boot flag
2018-04-27 16:44:29 +02:00
pmem.c
resource: Provide resource struct in resource walk callback
2017-11-07 15:35:57 +01:00
probe_roms.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
process_32.c
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
2018-09-06 14:33:12 +02:00
process_64.c
x86/process: Don't mix user/kernel regs in 64bit __show_regs()
2018-09-06 14:33:12 +02:00
process.c
x86/entry/32: Enter the kernel via trampoline stack
2018-07-20 01:11:37 +02:00
ptrace.c
signal: Ensure every siginfo we send has all bits initialized
2018-04-25 10:40:51 -05:00
pvclock.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
quirks.c
x86/mce: Check for alternate indication of machine check recovery on Skylake
2018-06-07 22:22:12 +02:00
reboot_fixups_32.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
reboot.c
x86/apic: Fix restoring boot IRQ mode in reboot and kexec/kdump
2018-02-17 11:47:45 +01:00
relocate_kernel_32.S
…
relocate_kernel_64.S
x86/kexec: Make kexec (mostly) work in 5-level paging mode
2018-01-31 08:39:40 +01:00
resource.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
rtc.c
x86: Convert x86_platform_ops to timespec64
2018-05-19 14:03:14 +02:00
setup_percpu.c
x86/cpu_entry_area: Sync cpu_entry_area to initial_page_table
2018-03-01 09:48:27 +01:00
setup.c
x86, hibernate: Fix nosave_regions setup for hibernation
2018-10-03 11:56:33 +02:00
signal_compat.c
signal: Add TRAP_UNK si_code for undiagnosted trap exceptions
2018-04-25 10:40:56 -05:00
signal.c
rseq: Avoid infinite recursion when delivering SIGSEGV
2018-06-22 19:04:22 +02:00
smp.c
x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d
2018-08-05 09:53:13 +02:00
smpboot.c
Merge 4.18-rc7 into master to pick up the KVM dependcy
2018-08-05 16:39:29 +02:00
stacktrace.c
x86/stacktrace: Do not fail for ORC with regs on stack
2018-06-21 16:34:56 +02:00
step.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sys_x86_64.c
compat: Move compat_timespec/ timeval to compat_time.h
2018-04-19 13:29:54 +02:00
sysfb_efi.c
…
sysfb_simplefb.c
…
sysfb.c
…
tboot.c
x86/pti: Make unpoison of pgd for trusted boot work for real
2018-01-11 23:36:59 +01:00
tce_64.c
…
time.c
x86: Don't include linux/irq.h from asm/hardirq.h
2018-08-05 09:53:13 +02:00
tls.c
x86/ldt: Make the LDT mapping RO
2017-12-23 21:13:01 +01:00
tls.h
…
topology.c
…
trace_clock.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tracepoint.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
traps.c
Merge branch 'linus' into x86/urgent
2018-06-22 21:20:35 +02:00
tsc_msr.c
x86/platform/intel-mid: Remove custom TSC calibration
2018-07-03 13:08:21 +02:00
tsc_sync.c
Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 19:07:38 -08:00
tsc.c
x86/tsc: Prevent result truncation on 32bit
2018-09-06 14:22:01 +02:00
umip.c
signal: Ensure every siginfo we send has all bits initialized
2018-04-25 10:40:51 -05:00
unwind_frame.c
x86/unwind: Disable unwinder warnings on 32-bit
2017-10-10 12:49:49 +02:00
unwind_guess.c
x86/unwind: Add the ORC unwinder
2017-07-26 13:18:20 +02:00
unwind_orc.c
x86/unwind/orc: Detect the end of the stack
2018-06-21 16:34:56 +02:00
uprobes.c
uprobes/x86: Remove incorrect WARN_ON() in uprobe_init_insn()
2018-06-21 17:11:02 +02:00
verify_cpu.S
x86/boot: Annotate verify_cpu() as a callable function
2017-09-28 09:39:03 +02:00
vm86_32.c
x86/entry: Rename update_sp0 to update_task_stack
2018-07-20 01:11:40 +02:00
vmlinux.lds.S
x86/mm/pti: Make pti_clone_kernel_text() compile on 32 bit
2018-07-20 01:11:44 +02:00
vsmp_64.c
x86/apic: Remove unused callbacks
2017-09-25 20:51:58 +02:00
x86_init.c
x86/tsc: Make use of tsc_calibrate_cpu_early()
2018-07-20 00:02:44 +02:00