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AFNElJ/4rr5/XBM4InBXsjNwAbFjEStqAE9aywxcOO+8fPqE8d1hLjKXiapSulH+jsLNoZPQ5oXnya8FBHvG@lists.linux.dev X-Gm-Message-State: AOJu0YzAnGEIwDSOxLtWevFpq40F6ItMbsVSm2IbBTutu1mlF2EvXzkv e6gzmyiJu/Mvmq57E1PjBx9ZrZKsKO99KG0gLPmqWysO93qjsUTi06Ux5sSN3AAjLVd6y7ooEMP aGyeDsQ782C37VJ9UuXKdatgWAw== X-Received: from pgbcr2.prod.google.com ([2002:a05:6a02:4102:b0:c76:1d9:8c20]) (user=ackerleytng job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:6a20:b0:398:8546:c3fc with SMTP id adf61e73a8af0-3a39bffeb82mr6084413637.7.1777419209934; Tue, 28 Apr 2026 16:33:29 -0700 (PDT) Date: Tue, 28 Apr 2026 16:33:20 -0700 In-Reply-To: <20260428-gmem-inplace-conversion-v5-0-d8608ccfca22@google.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260428-gmem-inplace-conversion-v5-0-d8608ccfca22@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: Subject: [POC PATCH 0/6] guest_memfd in-place conversion selftests for SNP From: Ackerley Tng To: devnull+ackerleytng.google.com@kernel.org Cc: ackerleytng@google.com, aik@amd.com, akpm@linux-foundation.org, andrew.jones@linux.dev, aneesh.kumar@kernel.org, axelrasmussen@google.com, baohua@kernel.org, bhe@redhat.com, binbin.wu@linux.intel.com, bp@alien8.de, brauner@kernel.org, chao.p.peng@linux.intel.com, chrisl@kernel.org, corbet@lwn.net, dave.hansen@linux.intel.com, david@kernel.org, forkloop@google.com, hpa@zytor.com, ira.weiny@intel.com, jgg@ziepe.ca, jmattson@google.com, jthoughton@google.com, kas@kernel.org, kasong@tencent.com, kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, mathieu.desnoyers@efficios.com, mhiramat@kernel.org, michael.roth@amd.com, mingo@redhat.com, nphamcs@gmail.com, oupton@kernel.org, pankaj.gupta@amd.com, pbonzini@redhat.com, pratyush@kernel.org, qi.zheng@linux.dev, qperret@google.com, rick.p.edgecombe@intel.com, rientjes@google.com, rostedt@goodmis.org, seanjc@google.com, shakeel.butt@linux.dev, shikemeng@huaweicloud.com, shivankg@amd.com, shuah@kernel.org, skhan@linuxfoundation.org, steven.price@arm.com, suzuki.poulose@arm.com, tabba@google.com, tglx@kernel.org, vannapurve@google.com, vbabka@kernel.org, weixugc@google.com, willy@infradead.org, wyihan@google.com, x86@kernel.org, yan.y.zhao@intel.com, youngjun.park@lge.com, yuanchu@google.com Content-Type: text/plain; charset="UTF-8" With these POC patches, I was able to test the set memory attributes/conversion ioctls with SNP. The content policies work, and PRESERVE can be used before the SNP VM is finalized. SNP_LAUNCH_UPDATE can accept 0 for source address and the SNP VM runs fine. :) Ackerley Tng (6): KVM: selftests: Initialize guest_memfd with INIT_SHARED KVM: selftests: Use guest_memfd memory contents in-place for SNP launch update KVM: selftests: Make guest_code_xsave more friendly KVM: selftests: Allow specifying CoCo-privateness while mapping a page KVM: selftests: Test conversions for SNP KVM: selftests: Test content modes ZERO and PRESERVE for SNP .../selftests/kvm/include/x86/processor.h | 2 + tools/testing/selftests/kvm/lib/kvm_util.c | 12 +- .../testing/selftests/kvm/lib/x86/processor.c | 13 +- tools/testing/selftests/kvm/lib/x86/sev.c | 9 +- .../selftests/kvm/x86/sev_smoke_test.c | 255 +++++++++++++++++- 5 files changed, 271 insertions(+), 20 deletions(-) -- 2.54.0.545.g6539524ca2-goog