ARM: KVM: Fix size check in __coherent_cache_guest_page

commit a050dfb21cc22ac0c666d52531040c1bc48184cc upstream.

The check is supposed to catch page-unaligned sizes, not the inverse.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index f95c124..d409c9c 100644 (file)
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -186,7 +186,7 @@ static inline void __coherent_cache_guest_page(struct kvm_vcpu *vcpu, pfn_t pfn,
 
        bool need_flush = !vcpu_has_cache_enabled(vcpu) || ipa_uncached;
 
-       VM_BUG_ON(size & PAGE_MASK);
+       VM_BUG_ON(size & ~PAGE_MASK);
 
        if (!need_flush && !icache_is_pipt())
                goto vipt_cache;