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Feng Tang 05ab1d8a4b x86/mm: Expand static page table for fixmap space 
We met a kernel panic when enabling earlycon, which is due to the fixmap
address of earlycon is not statically setup.

Currently the static fixmap setup in head_64.S only covers 2M virtual
address space, while it actually could be in 4M space with different
kernel configurations, e.g. when VSYSCALL emulation is disabled.

So increase the static space to 4M for now by defining FIXMAP_PMD_NUM to 2,
and add a build time check to ensure that the fixmap is covered by the
initial static page tables.

Fixes: 1ad83c858c ("x86_64,vsyscall: Make vsyscall emulation configurable")
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: kernel test robot <rong.a.chen@intel.com>
Reviewed-by: Juergen Gross <jgross@suse.com> (Xen parts)
Cc: H Peter Anvin <hpa@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andy Lutomirsky <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180920025828.23699-1-feng.tang@intel.com
 		2018-09-20 23:17:22 +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/intel_rdt: Fix incorrect loop end condition 2018-09-18 23:38:07 +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
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Makefile x86/paravirt: Make native_save_fl() extern inline 2018-07-03 10:56:27 +02:00
alternative.c x86/alternatives: Lockdep-enforce text_mutex in text_poke*() 2018-08-30 13:02:30 +02:00
amd_gart_64.c
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amd_nb.c
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apb_timer.c
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aperture_64.c
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apm_32.c x86/APM: Fix build warning when PROC_FS is not enabled 2018-09-15 10:16:25 +02:00
asm-offsets.c x86/entry/32: Enter the kernel via trampoline stack 2018-07-20 01:11:37 +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
audit_64.c
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bootflag.c
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check.c
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cpuid.c
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crash.c
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crash_dump_32.c
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crash_dump_64.c
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devicetree.c
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doublefault.c
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dumpstack.c x86/process: Don't mix user/kernel regs in 64bit __show_regs() 2018-09-06 14:33:12 +02:00
dumpstack_32.c
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dumpstack_64.c
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e820.c x86/e820: put !E820_TYPE_RAM regions into memblock.reserved 2018-06-28 11:16:44 -07:00
early-quirks.c On GEM side: 2018-07-20 12:29:24 +10:00
early_printk.c
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ebda.c
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eisa.c x86/EISA: Don't probe EISA bus for Xen PV guests 2018-09-11 23:36:50 +02:00
espfix_64.c
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ftrace.c
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ftrace_32.S
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ftrace_64.S
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head32.c
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head64.c x86/mm: Expand static page table for fixmap space 2018-09-20 23:17:22 +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/mm: Expand static page table for fixmap space 2018-09-20 23:17:22 +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
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i8253.c
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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
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ioport.c
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irq.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +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
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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
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jailhouse.c
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jump_label.c x86/alternatives, jumplabel: Use text_poke_early() before mm_init() 2018-07-20 00:02:38 +02:00
kdebugfs.c
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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
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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 x86/kvm: Use __bss_decrypted attribute in shared variables 2018-09-15 20:48:46 +02:00
ldt.c x86/ldt: Enable LDT user-mapping for PAE 2018-07-20 01:11:48 +02:00
livepatch.c
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machine_kexec_32.c x86/kexec: Allocate 8k PGDs for PTI 2018-07-30 13:53:48 +02:00
machine_kexec_64.c
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mmconf-fam10h_64.c
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module.c
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mpparse.c
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msr.c
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nmi.c
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nmi_selftest.c
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paravirt-spinlocks.c
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paravirt.c x86/paravirt: Fix some warning messages 2018-09-19 13:22:04 +02:00
paravirt_patch_32.c
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paravirt_patch_64.c x86/asm/64: Use 32-bit XOR to zero registers 2018-07-03 09:59:29 +02:00
pci-calgary_64.c
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pci-dma.c IOMMU Update for Linux v4.19 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
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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
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platform-quirks.c
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pmem.c
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probe_roms.c
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process.c x86/entry/32: Enter the kernel via trampoline stack 2018-07-20 01:11:37 +02:00
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
ptrace.c
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pvclock.c
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quirks.c x86/mce: Check for alternate indication of machine check recovery on Skylake 2018-06-07 22:22:12 +02:00
reboot.c
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reboot_fixups_32.c
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relocate_kernel_32.S
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relocate_kernel_64.S
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resource.c
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rtc.c
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setup.c pci-v4.19-changes 2018-08-16 09:21:54 -07:00
setup_percpu.c
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signal.c rseq: Avoid infinite recursion when delivering SIGSEGV 2018-06-22 19:04:22 +02:00
signal_compat.c
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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
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sys_x86_64.c
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sysfb.c
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sysfb_efi.c
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sysfb_simplefb.c
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tboot.c
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tce_64.c
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time.c x86: Don't include linux/irq.h from asm/hardirq.h 2018-08-05 09:53:13 +02:00
tls.c
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tls.h
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topology.c x86/xen: Disable CPU0 hotplug for Xen PV 2018-09-12 21:15:02 +02:00
trace_clock.c
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tracepoint.c
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traps.c Merge branch 'linus' into x86/urgent 2018-06-22 21:20:35 +02:00
tsc.c x86/tsc: Prevent result truncation on 32bit 2018-09-06 14:22:01 +02:00
tsc_msr.c x86/platform/intel-mid: Remove custom TSC calibration 2018-07-03 13:08:21 +02:00
tsc_sync.c
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umip.c
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unwind_frame.c
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unwind_guess.c
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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
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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: Add .bss..decrypted section to hold shared variables 2018-09-15 20:48:45 +02:00
vsmp_64.c
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x86_init.c x86/tsc: Make use of tsc_calibrate_cpu_early() 2018-07-20 00:02:44 +02:00