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51a0048beb
linux/arch/arm64/mm
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Will Deacon 51a0048beb arm64: mm: Map entry trampoline into trampoline and kernel page tables 
The exception entry trampoline needs to be mapped at the same virtual
address in both the trampoline page table (which maps nothing else)
and also the kernel page table, so that we can swizzle TTBR1_EL1 on
exceptions from and return to EL0.

This patch maps the trampoline at a fixed virtual address in the fixmap
area of the kernel virtual address space, which allows the kernel proper
to be randomized with respect to the trampoline when KASLR is enabled.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Laura Abbott <labbott@redhat.com>
Tested-by: Shanker Donthineni <shankerd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-12-11 13:40:50 +00:00
..
cache.S arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN 2017-12-11 13:40:35 +00:00
context.c arm64: mm: Allocate ASIDs in pairs 2017-12-11 13:40:38 +00:00
copypage.c arm64: Defer dcache flush in __cpu_copy_user_page 2015-12-17 11:07:13 +00:00
dma-mapping.c dma mapping : export caller to vmallocinfo 2017-10-04 13:43:00 +01:00
dump.c arm64: dump: Add checking for writable and exectuable pages 2016-11-07 18:15:04 +00:00
extable.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fault.c arm64 updates for 4.15 2017-11-15 10:56:56 -08:00
flush.c arm64: fix pmem interface definition 2017-08-10 18:13:59 +01:00
hugetlbpage.c arm64: hugetlb: Cleanup setup_hugepagesz 2017-08-22 17:47:12 +01:00
init.c arm64: kdump: provide /proc/vmcore file 2017-04-05 18:31:38 +01:00
ioremap.c arm64: use is_vmalloc_addr 2017-02-09 13:47:56 +00:00
kasan_init.c arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow 2017-11-15 18:21:05 -08:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmap.c arm64/mmap: properly account for stack randomization in mmap_base 2017-07-12 16:26:03 -07:00
mmu.c arm64: mm: Map entry trampoline into trampoline and kernel page tables 2017-12-11 13:40:50 +00:00
numa.c arm64/numa: Drop duplicate message 2017-07-20 17:03:53 +01:00
pageattr.c arm64: use set_memory.h header 2017-05-08 17:15:13 -07:00
pgd.c arm64: pgd: Mark pgd_cache as __ro_after_init 2017-12-01 13:05:04 +00:00
physaddr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
proc.S arm64: mm: Rename post_ttbr0_update_workaround 2017-12-11 13:40:32 +00:00
ptdump_debugfs.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00