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[34.127.0.230]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8434b03fd0bsm11119220b3a.50.2026.06.15.17.04.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Jun 2026 17:04:44 -0700 (PDT) Date: Tue, 16 Jun 2026 00:04:40 +0000 From: Lisa Wang To: Binbin Wu Cc: Andrew Jones , Ackerley Tng , Chao Gao , Chenyi Qiang , Dave Hansen , Erdem Aktas , Ira Weiny , Isaku Yamahata , Kiryl Shutsemau , linux-kselftest@vger.kernel.org, Paolo Bonzini , "Pratik R. Sampat" , Reinette Chatre , Rick Edgecombe , Roger Wang , Ryan Afranji , Sagi Shahar , Sean Christopherson , Shuah Khan , Oliver Upton , Jeremiah McReynolds , kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v13 13/22] KVM: selftests: Set first memory region as shared if guest_memfd Message-ID: References: <20260521-tdx-selftests-v13-v13-0-6983ae4c3a4d@google.com> <20260521-tdx-selftests-v13-v13-13-6983ae4c3a4d@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Mon, Jun 08, 2026 at 04:03:23PM +0800, Binbin Wu wrote: > On 5/22/2026 7:16 AM, Lisa Wang wrote: > > + * exactly like other memory providers. > > */ > > - flags = 0; > > - if (is_guest_memfd_required(shape)) > > + if (is_guest_memfd_required(shape)) { > > flags |= KVM_MEM_GUEST_MEMFD; > > + gmem_flags |= GUEST_MEMFD_FLAG_INIT_SHARED; > > + } > > > > - vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, flags); > > + vm_mem_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, flags, -1, 0, gmem_flags); > > The build failed due to this: > > lib/kvm_util.c: In function ‘__vm_create’: > lib/kvm_util.c:507:9: error: too many arguments to function ‘vm_mem_add’ > 507 | vm_mem_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, flags, -1, 0, gmem_flags); > | ^~~~~~~~~~ > In file included from lib/kvm_util.c:9: > include/kvm_util.h:714:6: note: declared here > 714 | void vm_mem_add(struct kvm_vm *vm, enum vm_mem_backing_src_type src_type, > | ^~~~~~~~~~ > lib/kvm_util.c: At top level: > cc1: note: unrecognized command-line option ‘-Wno-gnu-variable-sized-type-not-at-end’ may have been intended to silence earlier diagnostics > > It seems the patch set doesn't wire gmem_flags parameter to vm_mem_add(). This series need to based on "KVM: selftests: Add support for mmap() on guest_memfd in core library" for the gmem_flags parameter. Lisa > > for (i = 0; i < NR_MEM_REGIONS; i++) > > vm->memslots[i] = 0; > > > > >