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5615f69bc2
This patch initializes KASan shadow region's page table and memory.
There are two stage for KASan initializing:
1. At early boot stage the whole shadow region is mapped to just
one physical page (kasan_zero_page). It is finished by the function
kasan_early_init which is called by __mmap_switched(arch/arm/kernel/
head-common.S)
2. After the calling of paging_init, we use kasan_zero_page as zero
shadow for some memory that KASan does not need to track, and we
allocate a new shadow space for the other memory that KASan need to
track. These issues are finished by the function kasan_init which is
call by setup_arch.
When using KASan we also need to increase the THREAD_SIZE_ORDER
from 1 to 2 as the extra calls for shadow memory uses quite a bit
of stack.
As we need to make a temporary copy of the PGD when setting up
shadow memory we create a helpful PGD_SIZE definition for both
LPAE and non-LPAE setups.
The KASan core code unconditionally calls pud_populate() so this
needs to be changed from BUG() to do {} while (0) when building
with KASan enabled.
After the initial development by Andre Ryabinin several modifications
have been made to this code:
Abbott Liu <liuwenliang@huawei.com>
- Add support ARM LPAE: If LPAE is enabled, KASan shadow region's
mapping table need be copied in the pgd_alloc() function.
- Change kasan_pte_populate,kasan_pmd_populate,kasan_pud_populate,
kasan_pgd_populate from .meminit.text section to .init.text section.
Reported by Florian Fainelli <f.fainelli@gmail.com>
Linus Walleij <linus.walleij@linaro.org>:
- Drop the custom mainpulation of TTBR0 and just use
cpu_switch_mm() to switch the pgd table.
- Adopt to handle 4th level page tabel folding.
- Rewrite the entire page directory and page entry initialization
sequence to be recursive based on ARM64:s kasan_init.c.
Ard Biesheuvel <ardb@kernel.org>:
- Necessary underlying fixes.
- Crucial bug fixes to the memory set-up code.
Co-developed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Co-developed-by: Abbott Liu <liuwenliang@huawei.com>
Co-developed-by: Ard Biesheuvel <ardb@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: kasan-dev@googlegroups.com
Cc: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org> # QEMU/KVM/mach-virt/LPAE/8G
Tested-by: Florian Fainelli <f.fainelli@gmail.com> # Brahma SoCs
Tested-by: Ahmad Fatoum <a.fatoum@pengutronix.de> # i.MX6Q
Reported-by: Russell King - ARM Linux <rmk+kernel@armlinux.org.uk>
Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Signed-off-by: Abbott Liu <liuwenliang@huawei.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
119 lines
4.1 KiB
Makefile
119 lines
4.1 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux arm-specific parts of the memory manager.
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#
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obj-y := extable.o fault.o init.o iomap.o
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obj-y += dma-mapping$(MMUEXT).o
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obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \
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mmap.o pgd.o mmu.o pageattr.o
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KASAN_SANITIZE_mmu.o := n
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ifneq ($(CONFIG_MMU),y)
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obj-y += nommu.o
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obj-$(CONFIG_ARM_MPU) += pmsa-v7.o pmsa-v8.o
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endif
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obj-$(CONFIG_ARM_PTDUMP_CORE) += dump.o
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obj-$(CONFIG_ARM_PTDUMP_DEBUGFS) += ptdump_debugfs.o
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obj-$(CONFIG_MODULES) += proc-syms.o
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KASAN_SANITIZE_physaddr.o := n
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obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o
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obj-$(CONFIG_ALIGNMENT_TRAP) += alignment.o
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obj-$(CONFIG_HIGHMEM) += highmem.o
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obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
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obj-$(CONFIG_ARM_PV_FIXUP) += pv-fixup-asm.o
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obj-$(CONFIG_CPU_ABRT_NOMMU) += abort-nommu.o
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obj-$(CONFIG_CPU_ABRT_EV4) += abort-ev4.o
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obj-$(CONFIG_CPU_ABRT_EV4T) += abort-ev4t.o
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obj-$(CONFIG_CPU_ABRT_LV4T) += abort-lv4t.o
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obj-$(CONFIG_CPU_ABRT_EV5T) += abort-ev5t.o
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obj-$(CONFIG_CPU_ABRT_EV5TJ) += abort-ev5tj.o
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obj-$(CONFIG_CPU_ABRT_EV6) += abort-ev6.o
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obj-$(CONFIG_CPU_ABRT_EV7) += abort-ev7.o
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AFLAGS_abort-ev6.o :=-Wa,-march=armv6k
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AFLAGS_abort-ev7.o :=-Wa,-march=armv7-a
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obj-$(CONFIG_CPU_PABRT_LEGACY) += pabort-legacy.o
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obj-$(CONFIG_CPU_PABRT_V6) += pabort-v6.o
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obj-$(CONFIG_CPU_PABRT_V7) += pabort-v7.o
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obj-$(CONFIG_CPU_CACHE_V4) += cache-v4.o
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obj-$(CONFIG_CPU_CACHE_V4WT) += cache-v4wt.o
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obj-$(CONFIG_CPU_CACHE_V4WB) += cache-v4wb.o
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obj-$(CONFIG_CPU_CACHE_V6) += cache-v6.o
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obj-$(CONFIG_CPU_CACHE_V7) += cache-v7.o
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obj-$(CONFIG_CPU_CACHE_FA) += cache-fa.o
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obj-$(CONFIG_CPU_CACHE_NOP) += cache-nop.o
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obj-$(CONFIG_CPU_CACHE_V7M) += cache-v7m.o
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AFLAGS_cache-v6.o :=-Wa,-march=armv6
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AFLAGS_cache-v7.o :=-Wa,-march=armv7-a
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AFLAGS_cache-v7m.o :=-Wa,-march=armv7-m
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obj-$(CONFIG_CPU_COPY_V4WT) += copypage-v4wt.o
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obj-$(CONFIG_CPU_COPY_V4WB) += copypage-v4wb.o
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obj-$(CONFIG_CPU_COPY_FEROCEON) += copypage-feroceon.o
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obj-$(CONFIG_CPU_COPY_V6) += copypage-v6.o context.o
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obj-$(CONFIG_CPU_SA1100) += copypage-v4mc.o
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obj-$(CONFIG_CPU_XSCALE) += copypage-xscale.o
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obj-$(CONFIG_CPU_XSC3) += copypage-xsc3.o
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obj-$(CONFIG_CPU_COPY_FA) += copypage-fa.o
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CFLAGS_copypage-feroceon.o := -march=armv5te
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obj-$(CONFIG_CPU_TLB_V4WT) += tlb-v4.o
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obj-$(CONFIG_CPU_TLB_V4WB) += tlb-v4wb.o
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obj-$(CONFIG_CPU_TLB_V4WBI) += tlb-v4wbi.o
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obj-$(CONFIG_CPU_TLB_FEROCEON) += tlb-v4wbi.o # reuse v4wbi TLB functions
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obj-$(CONFIG_CPU_TLB_V6) += tlb-v6.o
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obj-$(CONFIG_CPU_TLB_V7) += tlb-v7.o
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obj-$(CONFIG_CPU_TLB_FA) += tlb-fa.o
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AFLAGS_tlb-v6.o :=-Wa,-march=armv6
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AFLAGS_tlb-v7.o :=-Wa,-march=armv7-a
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obj-$(CONFIG_CPU_ARM7TDMI) += proc-arm7tdmi.o
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obj-$(CONFIG_CPU_ARM720T) += proc-arm720.o
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obj-$(CONFIG_CPU_ARM740T) += proc-arm740.o
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obj-$(CONFIG_CPU_ARM9TDMI) += proc-arm9tdmi.o
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obj-$(CONFIG_CPU_ARM920T) += proc-arm920.o
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obj-$(CONFIG_CPU_ARM922T) += proc-arm922.o
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obj-$(CONFIG_CPU_ARM925T) += proc-arm925.o
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obj-$(CONFIG_CPU_ARM926T) += proc-arm926.o
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obj-$(CONFIG_CPU_ARM940T) += proc-arm940.o
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obj-$(CONFIG_CPU_ARM946E) += proc-arm946.o
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obj-$(CONFIG_CPU_FA526) += proc-fa526.o
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obj-$(CONFIG_CPU_ARM1020) += proc-arm1020.o
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obj-$(CONFIG_CPU_ARM1020E) += proc-arm1020e.o
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obj-$(CONFIG_CPU_ARM1022) += proc-arm1022.o
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obj-$(CONFIG_CPU_ARM1026) += proc-arm1026.o
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obj-$(CONFIG_CPU_SA110) += proc-sa110.o
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obj-$(CONFIG_CPU_SA1100) += proc-sa1100.o
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obj-$(CONFIG_CPU_XSCALE) += proc-xscale.o
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obj-$(CONFIG_CPU_XSC3) += proc-xsc3.o
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obj-$(CONFIG_CPU_MOHAWK) += proc-mohawk.o
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obj-$(CONFIG_CPU_FEROCEON) += proc-feroceon.o
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obj-$(CONFIG_CPU_V6) += proc-v6.o
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obj-$(CONFIG_CPU_V6K) += proc-v6.o
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obj-$(CONFIG_CPU_V7) += proc-v7.o proc-v7-bugs.o
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obj-$(CONFIG_CPU_V7M) += proc-v7m.o
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AFLAGS_proc-v6.o :=-Wa,-march=armv6
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AFLAGS_proc-v7.o :=-Wa,-march=armv7-a
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obj-$(CONFIG_OUTER_CACHE) += l2c-common.o
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obj-$(CONFIG_CACHE_B15_RAC) += cache-b15-rac.o
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obj-$(CONFIG_CACHE_FEROCEON_L2) += cache-feroceon-l2.o
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obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o l2c-l2x0-resume.o
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obj-$(CONFIG_CACHE_L2X0_PMU) += cache-l2x0-pmu.o
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obj-$(CONFIG_CACHE_XSC3L2) += cache-xsc3l2.o
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obj-$(CONFIG_CACHE_TAUROS2) += cache-tauros2.o
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obj-$(CONFIG_CACHE_UNIPHIER) += cache-uniphier.o
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KASAN_SANITIZE_kasan_init.o := n
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obj-$(CONFIG_KASAN) += kasan_init.o
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