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authorChristoffer Dall <christoffer.dall@linaro.org>2014-05-09 23:31:31 +0200
committerChristoffer Dall <christoffer.dall@linaro.org>2014-07-11 04:46:51 -0700
commit4f853a714bf16338ff5261128e6c7ae2569e9505 (patch)
tree3726687645ce6cc69b732606ebf07ff89cea63e5 /arch/arm/include
parent9f6226a762c7ae02f6a23a3d4fc552dafa57ea23 (diff)
arm/arm64: KVM: Fix and refactor unmap_range
unmap_range() was utterly broken, to quote Marc, and broke in all sorts of situations. It was also quite complicated to follow and didn't follow the usual scheme of having a separate iterating function for each level of page tables. Address this by refactoring the code and introduce a pgd_clear() function. Reviewed-by: Jungseok Lee <jays.lee@samsung.com> Reviewed-by: Mario Smarduch <m.smarduch@samsung.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/kvm_mmu.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index 5c7aa3c1519f..5cc0b0f5f72f 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -127,6 +127,18 @@ static inline void kvm_set_s2pmd_writable(pmd_t *pmd)
(__boundary - 1 < (end) - 1)? __boundary: (end); \
})
+static inline bool kvm_page_empty(void *ptr)
+{
+ struct page *ptr_page = virt_to_page(ptr);
+ return page_count(ptr_page) == 1;
+}
+
+
+#define kvm_pte_table_empty(ptep) kvm_page_empty(ptep)
+#define kvm_pmd_table_empty(pmdp) kvm_page_empty(pmdp)
+#define kvm_pud_table_empty(pudp) (0)
+
+
struct kvm;
#define kvm_flush_dcache_to_poc(a,l) __cpuc_flush_dcache_area((a), (l))