Re: [PATCH mm-unstable v2 09/10] kvm/x86: add kvm_arch_test_clear_young()

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On 5/27/23 01:44, Yu Zhao wrote:
+#define kvm_arch_has_test_clear_young kvm_arch_has_test_clear_young
+static inline bool kvm_arch_has_test_clear_young(void)
+{
+	return IS_ENABLED(CONFIG_X86_64) &&
+	       (!IS_REACHABLE(CONFIG_KVM) || (tdp_mmu_enabled && shadow_accessed_mask));
+}

I don't think you need IS_REACHABLE(CONFIG_KVM) here, it would be a bug if this is called from outside KVM code.

Maybe make it a BUILD_BUG_ON?

Paolo





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