From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f202.google.com (mail-pg1-f202.google.com [209.85.215.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E41EE3806B3 for ; Tue, 28 Apr 2026 23:33:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777419212; cv=none; b=dhG/yt9LwORml8vf4lPHsuIHbpSmQlFaCbGWT4d3MTFPqVHBHkppOKAn8JAwCStVQ3YxErW7d389G7+a2NwXe7sGEgjsh3QcTSBYkSDQT+weFbYYzFzYRBBssGT6ow6/H+i2yiaEGd6U7izSx4hcBwokW4as1edR4Y3hfvXbkvU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777419212; c=relaxed/simple; bh=u5jNgX3aBCZeke7gIDGCVPb6JkDwECjFRBtYrME8E6o=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=YrI5V+uroFY+y0pD7y+8hciFShaOgoqI1C/1erIWxdk7IwQsOVp91KfihuUsMD19VVACL1flFHeV3n/R+7oVzOz4Vg7cu6Kr+ntU3ygioUf0bi6XWfUAgBzlNrEkXITnW7qn73zkDpxVtaQBfPyYEO6LB1PIfUOhjYS36p4RBgQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=f0EbKtvI; arc=none smtp.client-ip=209.85.215.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--ackerleytng.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="f0EbKtvI" Received: by mail-pg1-f202.google.com with SMTP id 41be03b00d2f7-c79943d2fbfso3692019a12.1 for ; Tue, 28 Apr 2026 16:33:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777419210; x=1778024010; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=JywkponAAlLbpKs0ZR4pdZDQ9JhpG3xml6Pp+KH2bc4=; b=f0EbKtvIggskKvEMJ2/jHZ0vIccIW2mkd6vuGeStLeJ+1zsQHufB7qstKnjKkV0+xw +OLMAg6bbn5xX8BMUT+Mg7hU1nvjc6O2MpJB54SjYdh0C/3R1lw0mXmHlX7jitRgSgWS 8xtI/Y+1ur0Sb3092x3a9IOlDAIOPaG5tUCYgFvisghsDsnXpvwGi/qw5DkT6I/DGY4A evvwqdgrYydCD6ZIrSQ9g12pDDURzQxVZ+wRmMIXWQ/4DwWCjlinIDMaSlodaYHKPRup UMF+A8Gb3U+KsjpU728uXkRu6wwwEPkNLB6/tBoejX1667brP0vFTctX5JQCszw1zxM8 Lg3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777419210; x=1778024010; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=JywkponAAlLbpKs0ZR4pdZDQ9JhpG3xml6Pp+KH2bc4=; b=rXZJ+zi70jynwr6kCozJoHbcQPUXlLpp/RRB60Yf+bzGVPpJNfHkdAxs/IarOHDzHl 7IXsX3uW4Ukl3+taIYw9WNxZfXsNlYSIhO4OFvQ4SakrtqtK1XdQtkbZaQrdCimDMOgV d6p7jeuQXW4lpiTPcxgni0ea0jMnG8H/vOOciZo1wnNxaS5BMt26j7GfevIiyoQvgqTG fnQ+s0mF10r0AU9BiMYrvr7sd3Hjk1aoMWILdFnynd2wEjVRMUhp9Mq4MhYIcgdih5LU n60t68zCpL9cMPKJ+xUigg+Xpu3vjwS1pgPhlifjT+8im9w4SGEfCoakzsJftIaF7ulF 0qiw== X-Forwarded-Encrypted: i=1; AFNElJ+CHeHLuBsWB3RPQIWtBYGLKG7ye7sCwf9Gh0fCSAJWBYjrGpR/0xa4bmOLMkeOSHzDBJzPKASVy34PzoU=@vger.kernel.org X-Gm-Message-State: AOJu0YykjB6WJ3r9LWXJ4rj8LSTK0YjXRlRJatXEowf5oTjmQq0RehYQ 0jiMQncfZ4RASDej+9iL0hZ5Gz2l6aXOBaFLyPAcgWu/nENi7l8zGvNOq132uhE+Xre9O9MJ/TW Hy8ONZzmOXQA89aCskRzUSF6Z5w== 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-kernel@vger.kernel.org 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