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 <[email protected]> --- arch/arm64/include/asm/pgtable-hwdef.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 2813748..c3ae239 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -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). -- 2.1.4 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
