Il 20/08/2014 05:17, Wanpeng Li ha scritto: > + else if (spte & (1ULL << 7)) You have to check level == 1 specifically here, or add... > + /* > + * 1GB/2MB page, bits 29:12 or 20:12 reserved respectively, > + * level == 1 if the hypervisor is using the ignored bit 7. > + */ > + mask |= (PAGE_SIZE << ((level - 1) * 9)) - PAGE_SIZE; > + else ... "if (level > 1)" here. Otherwise, you're marking bits 6:3 as reserved for 4K pages. This should cause a WARN, because KVM puts 0110 in those bits: ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT) | VMX_EPT_IPAT_BIT; (in vmx_get_mt_mask: writeback memory, ignore PAT memory type from the guest's page tables) How are you testing this patch? Paolo > + /* bits 6:3 reserved */ > + mask |= 0x78; -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html