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arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI
Commit 9b0de864b5
upstream.
Since an mm has both a kernel and a user ASID, we need to ensure that
broadcast TLB maintenance targets both address spaces so that things
like CoW continue to work with the uaccess primitives in the kernel.
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>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
53b1395088
commit
d6c414013b
1 changed files with 14 additions and 2 deletions
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@ -23,6 +23,7 @@
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#include <linux/sched.h>
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#include <asm/cputype.h>
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#include <asm/mmu.h>
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/*
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* Raw TLBI operations.
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@ -54,6 +55,11 @@
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#define __tlbi(op, ...) __TLBI_N(op, ##__VA_ARGS__, 1, 0)
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#define __tlbi_user(op, arg) do { \
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if (arm64_kernel_unmapped_at_el0()) \
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__tlbi(op, (arg) | USER_ASID_FLAG); \
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} while (0)
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/*
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* TLB Management
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* ==============
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@ -115,6 +121,7 @@ static inline void flush_tlb_mm(struct mm_struct *mm)
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dsb(ishst);
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__tlbi(aside1is, asid);
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__tlbi_user(aside1is, asid);
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dsb(ish);
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}
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@ -125,6 +132,7 @@ static inline void flush_tlb_page(struct vm_area_struct *vma,
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dsb(ishst);
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__tlbi(vale1is, addr);
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__tlbi_user(vale1is, addr);
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dsb(ish);
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}
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@ -151,10 +159,13 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma,
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dsb(ishst);
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for (addr = start; addr < end; addr += 1 << (PAGE_SHIFT - 12)) {
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if (last_level)
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if (last_level) {
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__tlbi(vale1is, addr);
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else
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__tlbi_user(vale1is, addr);
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} else {
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__tlbi(vae1is, addr);
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__tlbi_user(vae1is, addr);
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}
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}
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dsb(ish);
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}
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@ -194,6 +205,7 @@ static inline void __flush_tlb_pgtable(struct mm_struct *mm,
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unsigned long addr = uaddr >> 12 | (ASID(mm) << 48);
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__tlbi(vae1is, addr);
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__tlbi_user(vae1is, addr);
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dsb(ish);
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}
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