Hi KarimAllah, Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on tip/auto-latest] [also build test WARNING on v4.16-rc2 next-20180222] [cannot apply to kvm/linux-next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/KarimAllah-Ahmed/KVM-X86-Handle-guest-memory-that-does-not-have-a-struct-page/20180223-064826 config: i386-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): arch/x86/kvm/vmx.c: In function 'vmx_write_pml_buffer': >> arch/x86/kvm/vmx.c:11951:18: warning: cast to pointer from integer of >> different size [-Wint-to-pointer-cast] dst = (gpa_t)(((u64 *)vmcs12->pml_address) + vmcs12->guest_pml_index); ^ >> arch/x86/kvm/vmx.c:11951:9: warning: cast from pointer to integer of >> different size [-Wpointer-to-int-cast] dst = (gpa_t)(((u64 *)vmcs12->pml_address) + vmcs12->guest_pml_index); ^ vim +11951 arch/x86/kvm/vmx.c 11926 11927 static int vmx_write_pml_buffer(struct kvm_vcpu *vcpu) 11928 { 11929 struct vmcs12 *vmcs12; 11930 struct vcpu_vmx *vmx = to_vmx(vcpu); 11931 gpa_t gpa, dst; 11932 11933 if (is_guest_mode(vcpu)) { 11934 WARN_ON_ONCE(vmx->nested.pml_full); 11935 11936 /* 11937 * Check if PML is enabled for the nested guest. 11938 * Whether eptp bit 6 is set is already checked 11939 * as part of A/D emulation. 11940 */ 11941 vmcs12 = get_vmcs12(vcpu); 11942 if (!nested_cpu_has_pml(vmcs12)) 11943 return 0; 11944 11945 if (vmcs12->guest_pml_index >= PML_ENTITY_NUM) { 11946 vmx->nested.pml_full = true; 11947 return 1; 11948 } 11949 11950 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS) & ~0xFFFull; 11951 dst = (gpa_t)(((u64 *)vmcs12->pml_address) + vmcs12->guest_pml_index); 11952 11953 if (kvm_write_guest(vcpu->kvm, dst, &gpa, sizeof(gpa))) 11954 return 0; 11955 11956 vmcs12->guest_pml_index--; 11957 } 11958 11959 return 0; 11960 } 11961 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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