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[ARM] Control v6 'global' bit via Linux PTE entries

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Unfortunately, we can't use the "user" bit in the page tables to
control whether a page table entry is "global" or "asid" specific,
since the vector page is mapped as "user" accessible but is not
process specific.

Therefore, give direct control of the ARMv6 "nG" (not global)
bit to the mm layers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2005-08-10 16:18:35 +01:00
committed by Russell King
parent 1b9749e7f1
commit 6626a7076d
3 changed files with 18 additions and 5 deletions
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2
include/asm-arm/pgtable.h
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@ -230,6 +230,8 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
#define L_PTE_WRITE (1 << 5)
#define L_PTE_EXEC (1 << 6)
#define L_PTE_DIRTY (1 << 7)
#define L_PTE_SHARED (1 << 10) /* shared between CPUs (v6) */
#define L_PTE_ASID (1 << 11) /* non-global (use ASID, v6) */
#ifndef __ASSEMBLY__