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a=ed25519; pk=sAZDYXdm6Iz8FHitpHeFlCMXwabodTm7p8/3/8xUxuU= X-Developer-Signature: v=1; a=ed25519-sha256; t=1787735885; l=2538; i=ackerleytng@google.com; s=20260225; h=from:subject:message-id; bh=Fuuvvm9TGdHzuyGqmCG/7y25PwPAioa9a5TcO7RLGpo=; b=+J4GD33/HdpdrEFr5MrH+KM1LHa2vckCr8RaWwO2SO5eEYH0A5e7TGCzVEy+C6S/XAfzoI+YF gewtvjSJTvnBccflyC8pq4jmTvD+cMIRcYwK2FB6Bp6gHJiHCOw27HK X-Mailer: b4 0.16.0 Message-ID: <20260826-gmem-inplace-conversion-v11-43-0a15d8a799aa@google.com> Subject: [PATCH v11 43/46] KVM: selftests: Support guest_memfd attributes in private_mem_conversions_test From: Ackerley Tng To: aik@amd.com, andrew.jones@linux.dev, binbin.wu@linux.intel.com, brauner@kernel.org, chao.p.peng@linux.intel.com, david@kernel.org, jmattson@google.com, jthoughton@google.com, michael.roth@amd.com, oupton@kernel.org, pankaj.gupta@amd.com, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, shivankg@amd.com, steven.price@arm.com, willy@infradead.org, wyihan@google.com, yan.y.zhao@intel.com, forkloop@google.com, pratyush@kernel.org, suzuki.poulose@arm.com, aneesh.kumar@kernel.org, liam@infradead.org, Paolo Bonzini , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Jonathan Corbet , Shuah Khan , Shuah Khan , Vishal Annapurve , Andrew Morton , Chris Li , Kairui Song , Kemeng Shi , Nhat Pham , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Youngjun Park , Qi Zheng , Shakeel Butt , Kiryl Shutsemau , Baoquan He , Jason Gunthorpe , John Hubbard , Peter Xu , tarunsahu@google.com, Fuad Tabba , Vlastimil Babka Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-coco@lists.linux.dev, Ackerley Tng , Xiaoyao Li Content-Type: text/plain; charset="utf-8" X-Stat-Signature: 5i8n4jbdujugis86r5cagikhw7ndxpg5 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 93C964000D X-Rspam-User: X-HE-Tag: 1787735962-230284 X-HE-Meta: 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 MOWEuQ9s 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Update private_mem_conversions_test to support environments where guest_memfd tracks memory attributes. At guest_memfd setup time, initialize the guest_memfd as shared to align with how memory would default to shared when shared/private state was tracked at the VM level. When handling a hypercall to set attributes, use vm_mem_set_memory_attributes() to send the ioctl to the guest_memfd instead of the VM. Suggested-by: Xiaoyao Li Signed-off-by: Ackerley Tng --- .../selftests/kvm/x86/private_mem_conversions_test.c | 18 +++++++++++++----- 1 file changed, 13 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c b/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c index cf50e9a332c5b..0c94e36575a5e 100644 --- a/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c +++ b/tools/testing/selftests/kvm/x86/private_mem_conversions_test.c @@ -306,9 +306,12 @@ static void handle_exit_hypercall(struct kvm_vcpu *vcpu) if (do_fallocate) vm_guest_mem_fallocate(vm, gpa, size, map_shared); - if (set_attributes) - vm_set_memory_attributes(vm, gpa, size, - map_shared ? 0 : KVM_MEMORY_ATTRIBUTE_PRIVATE); + if (set_attributes) { + u64 attrs = map_shared ? 0 : KVM_MEMORY_ATTRIBUTE_PRIVATE; + + vm_mem_set_memory_attributes(vm, gpa, size, attrs); + } + run->hypercall.ret = 0; } @@ -383,6 +386,7 @@ static void test_mem_conversions(enum vm_mem_backing_src_type src_type, u32 nr_v struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; pthread_t threads[KVM_MAX_VCPUS]; struct kvm_vm *vm; + u64 gmem_flags; int memfd, i; const struct vm_shape shape = { @@ -397,12 +401,16 @@ static void test_mem_conversions(enum vm_mem_backing_src_type src_type, u32 nr_v vm_enable_cap(vm, KVM_CAP_EXIT_HYPERCALL, (1 << KVM_HC_MAP_GPA_RANGE)); - memfd = vm_create_guest_memfd(vm, memfd_size, 0); + gmem_flags = 0; + if (kvm_has_gmem_attributes) + gmem_flags |= GUEST_MEMFD_FLAG_INIT_SHARED; + + memfd = vm_create_guest_memfd(vm, memfd_size, gmem_flags); for (i = 0; i < nr_memslots; i++) vm_mem_add(vm, src_type, BASE_DATA_GPA + slot_size * i, BASE_DATA_SLOT + i, slot_size / vm->page_size, - KVM_MEM_GUEST_MEMFD, memfd, slot_size * i, 0); + KVM_MEM_GUEST_MEMFD, memfd, slot_size * i, gmem_flags); for (i = 0; i < nr_vcpus; i++) { gpa_t gpa = BASE_DATA_GPA + i * per_cpu_size; -- 2.55.0.887.g758fc8c411-goog