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f4e342c877
linux/arch/x86/mm
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Boris Ostrovsky f4e342c877 x86/mm: Skip the hypervisor range when walking PGD 
The range between 0xffff800000000000 and 0xffff87ffffffffff is reserved
for hypervisor and therefore we should not try to follow PGD's indexes
corresponding to those addresses.

While this has always been a problem, with the new W+X warning
mechanism ptdump_walk_pgd_level_core() can now be called during boot,
causing a PV Xen guest to crash.

[ tglx: Replaced the macro with a readable inline ]

Fixes: e1a58320a3 "x86/mm: Warn on W^X mappings"
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: xen-devel@lists.xen.org
Link: http://lkml.kernel.org/r/1446749795-27764-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-11-07 10:39:39 +01:00
..
kmemcheck x86: Replace __get_cpu_var uses 2014-08-26 13:45:49 -04:00
amdtopology.c x86/mm/numa: Simplify some bit mangling 2013-04-10 19:06:26 +02:00
dump_pagetables.c x86/mm: Skip the hypervisor range when walking PGD 2015-11-07 10:39:39 +01:00
extable.c x86, extable: Switch to relative exception table entries 2012-04-20 17:22:34 -07:00
fault.c x86/vm86: Clean up vm86.h includes 2015-07-31 13:31:10 +02:00
gup.c x86/mm: Fix gup_huge_p?d() to handle large PAT bit 2015-09-22 21:27:33 +02:00
highmem_32.c sched/preempt, mm/kmap: Explicitly disable/enable preemption in kmap_atomic_* 2015-05-19 08:39:14 +02:00
hugetlbpage.c mm/hugetlb: pmd_huge() returns true for non-present hugepage 2015-02-11 17:06:01 -08:00
init_32.c x86/mm: Warn on W^X mappings 2015-10-06 11:11:48 +02:00
init_64.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 21:23:56 -08:00
init.c x86/microcode: Merge the early microcode loader 2015-10-21 11:22:12 +02:00
iomap_32.c 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
ioremap.c x86/mm: Fix newly introduced printk format warnings 2015-07-24 16:35:33 +02:00
kasan_init_64.c x86/kasan, mm: Introduce generic kasan_populate_zero_shadow() 2015-08-22 14:54:55 +02:00
kmmio.c x86: Delete non-required instances of include <linux/init.h> 2014-01-06 21:25:18 -08:00
Makefile x86/mm: Warn on W^X mappings 2015-10-06 11:11:48 +02:00
mm_internal.h x86: Enable PAT to use cache mode translation tables 2014-11-16 11:04:26 +01:00
mmap.c x86/mpx: Do not set ->vm_ops on MPX VMAs 2015-07-21 07:57:16 +02:00
mmio-mod.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
mpx.c x86/fpu/mpx: Rework MPX 'xstate' types 2015-09-14 12:22:00 +02:00
numa_32.c x86: Fix the initialization of physnode_map 2014-02-01 22:15:51 -08:00
numa_64.c x86, mm: kill numa_free_all_bootmem() 2012-11-17 11:59:47 -08:00
numa_emulation.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
numa_internal.h x86-32, mm: Rip out x86_32 NUMA remapping code 2013-01-31 14:12:30 -08:00
numa.c mem-hotplug: handle node hole when initializing numa_meminfo. 2015-09-08 15:35:28 -07:00
pageattr-test.c x86/mm/pat: Make mm/pageattr[-test].c explicitly non-modular 2015-08-25 09:48:38 +02:00
pageattr.c Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-11-03 21:23:56 -08:00
pat_internal.h x86/mm/pat: Convert to pr_*() usage 2015-05-27 14:40:59 +02:00
pat_rbtree.c x86/mm/pat: Convert to pr_*() usage 2015-05-27 14:40:59 +02:00
pat.c x86/mm/pat: Extend set_page_memtype() to support Write-Through type 2015-06-07 15:28:59 +02:00
pf_in.c x86: Eliminate various 'set but not used' warnings 2011-05-21 19:10:33 +02:00
pf_in.h
pgtable_32.c x86: Remove set_pmd_pfn 2014-09-01 10:15:31 +02:00
pgtable.c x86/mm/mtrr: Enhance MTRR checks in kernel mapping helpers 2015-05-27 14:40:58 +02:00
physaddr.c x86, mm: Make DEBUG_VIRTUAL work earlier in boot 2013-01-25 16:33:22 -08:00
physaddr.h
setup_nx.c x86: delete __cpuinit usage from all x86 files 2013-07-14 19:36:56 -04:00
srat.c x86/mm/srat: Print non-volatile flag in SRAT 2015-09-02 09:33:25 +02:00
testmmiotrace.c
tlb.c x86, mm: trace when an IPI is about to be sent 2015-09-04 16:54:41 -07:00