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arm64: Add PTE_HYP_XN page table flag 

EL2 page tables can be configured to deny code from being
executed, which is done by setting bit 54 in the page descriptor.

It is the same bit as PTE_UXN, but the "USER" reference felt odd
in the hypervisor code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
hifive-unleashed-5.1
Marc Zyngier 2016-06-13 15:00:46 +01:00 committed by Christoffer Dall
parent c8dddecdeb
commit 1166f3fe6a
1 changed files with 1 additions and 0 deletions
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arch/arm64/include/asm/pgtable-hwdef.h
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@ -164,6 +164,7 @@
#define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */
#define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */
#define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */
#define PTE_HYP_XN (_AT(pteval_t, 1) << 54) /* HYP XN */
/*
* AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).