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kvm-arm: arm64: Introduce hyp page table empty checks 

Introduce hyp_pxx_table_empty helpers for checking whether
a given table entry is empty. This will be used explicitly
once we switch to explicit routines for hyp page table walk.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
This commit is contained in:
Suzuki K Poulose 2016-03-22 17:20:28 +00:00 committed by Christoffer Dall
parent c0ef6326dd
commit 66f877faf9
1 changed files with 14 additions and 0 deletions
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14
arch/arm64/include/asm/kvm_mmu.h
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@ -249,6 +249,20 @@ static inline bool kvm_page_empty(void *ptr)
#endif
#define hyp_pte_table_empty(ptep) kvm_page_empty(ptep)
#ifdef __PAGETABLE_PMD_FOLDED
#define hyp_pmd_table_empty(pmdp) (0)
#else
#define hyp_pmd_table_empty(pmdp) kvm_page_empty(pmdp)
#endif
#ifdef __PAGETABLE_PUD_FOLDED
#define hyp_pud_table_empty(pudp) (0)
#else
#define hyp_pud_table_empty(pudp) kvm_page_empty(pudp)
#endif
struct kvm;
#define kvm_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l))