mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git
synced 2026-11-09 19:10:45 +01:00
Andrey Konovalov
01d92c7f35
HW_TAGS KASAN relies on ARM Memory Tagging Extension (MTE). With MTE, a memory region must be mapped as MT_NORMAL_TAGGED to allow setting memory tags via MTE-specific instructions. Add proper protection bits to vmalloc() allocations. These allocations are always backed by page_alloc pages, so the tags will actually be getting set on the corresponding physical memory. Link: https://lkml.kernel.org/r/983fc33542db2f6b1e77b34ca23448d4640bbb9e.1643047180.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <[email protected]> Co-developed-by: Vincenzo Frascino <[email protected]> Signed-off-by: Vincenzo Frascino <[email protected]> Acked-by: Marco Elver <[email protected]> Cc: Alexander Potapenko <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Evgenii Stepanov <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Peter Collingbourne <[email protected]> Cc: Will Deacon <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
35 lines
805 B
C
35 lines
805 B
C
#ifndef _ASM_ARM64_VMALLOC_H
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#define _ASM_ARM64_VMALLOC_H
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
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#define arch_vmap_pud_supported arch_vmap_pud_supported
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static inline bool arch_vmap_pud_supported(pgprot_t prot)
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{
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/*
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* SW table walks can't handle removal of intermediate entries.
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*/
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return pud_sect_supported() &&
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!IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
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}
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#define arch_vmap_pmd_supported arch_vmap_pmd_supported
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static inline bool arch_vmap_pmd_supported(pgprot_t prot)
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{
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/* See arch_vmap_pud_supported() */
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return !IS_ENABLED(CONFIG_PTDUMP_DEBUGFS);
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}
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#endif
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#define arch_vmap_pgprot_tagged arch_vmap_pgprot_tagged
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static inline pgprot_t arch_vmap_pgprot_tagged(pgprot_t prot)
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{
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return pgprot_tagged(prot);
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}
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#endif /* _ASM_ARM64_VMALLOC_H */
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