From patchwork Wed Jun 11 21:16:27 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Afranji X-Patchwork-Id: 895640 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 1BC6A1A8F82 for ; Wed, 11 Jun 2025 21:16:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749676617; cv=none; b=oUgI5OCNWWFfVPL5rXP7ccAxaua6Y1ek0VDY35bRQkgvmCM5iFMGY4XptJABYmUpq76lOPh6YRZN+C5sQjl16H99gWL6N0aw+C7/Hu9qxnhyV4mDnnArk7KXBcKrnz9kYyzHJqr3Uwe2Dk3jhPIBLqpmPGM0IvY631M1I2IfF7c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749676617; c=relaxed/simple; bh=NECYWsPH7RKAtQbRL0XnwHUNxi8qMBhhQIcgYAF72FU=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=AqefCtaYxc1nf0F2E5VbUIisRhwHxmdCoM5SRgMkH8tDcaao/C5LpC6MKw9dZKu99UwN7MdOttuThJQA8rCv/vbe8ELn7WC3Q/BkOrW8cz/XHStoKtEnAbyQNlbWO9s4bRtVLcoBlrgPjs8Oj/dy3gXh1PzoNmgimiR7+DUDV0w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--afranji.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jYGZKaX5; arc=none smtp.client-ip=209.85.216.73 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--afranji.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jYGZKaX5" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3138e64b3f1so292074a91.3 for ; Wed, 11 Jun 2025 14:16:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749676615; x=1750281415; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=LOsJ8fO8l9KNsBrYZMTXVSP3wn3/FZjJX+dB1opvLg8=; b=jYGZKaX5LNUxWcMqgpTV2NUUw6oUIKcSxTfToAFaivjmEn8d7CqwqEVOwVR/R/rhn1 K4O+xQB+eY7biq1mo2zqTQjrh2Ww5R7Qp02ZR5bNwIv1aiJSegQYQFr+O9aUZqoY30QH PIb1glceS0V9B9lFOsQOH/5V6dq3EyjhmKJ3SVDhHCL6Aa3NC9zdzKBwPCJpjQTedVBo ZbTASs9ovX0+7C9PGI8Ki7xkYDxsX78bactpJCM05alqcsAaDmi+yo/aCRZc8AZg8MRm 2jqMJA7FO0f3xcs432+eMtmQJbhzRCV/+lGhNgNDLXmeXjB8dbmF3RQoqrjG/lEGXGHO 8sOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749676615; x=1750281415; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=LOsJ8fO8l9KNsBrYZMTXVSP3wn3/FZjJX+dB1opvLg8=; b=UCXuV9ssJ6evE8FyHk7Z3/8OH7LWY/N39CchxM7rwQU3vaxPftULiawuGRVhYJxXhf 9Td7ecizuJ0I9uqRW3u6d/NzJvyv+H6Iyrkbf67Zy2iTGf61Cx9NvR44CEqQ7BCQSdvB sFShTp3gPtCu756OU4+eidqach9R2KqQoIEBxqvV9kiLUwhNnvzx58Ebvkr2iDNWZLP4 w2lFJndaV+hV5aYuIpTGJl5PKgualkq8UwKCVkS12xV73ismqiCBtumQXU7G3p5t18fG f9uwaGoxHMDqxC7ExSQ3U0NH5GYZNHYYJ27Krj6bNwOhtMTMObl8OTSMpO0hA+eqoyYp X6NA== X-Forwarded-Encrypted: i=1; AJvYcCUwDXR5UKzwnLj1PyoGIfmi+SI7CPeSj/r5bZsFnSxtYKWfFdN6v6xF3kgJ06s9bqZMyJaq9wB2tHjv0MnEYGg=@vger.kernel.org X-Gm-Message-State: AOJu0Yzp8xJANNqUn1tdkPhc0DY+2u0KQ5u3+162+MPGwYzxI7FP60iS dCQ/llfMTiM2ok+nWCqCf94urrVeMeHNyrKbXKBrtPXp06N0I9YmiOgXNwnzS0uzU5OVHOexzg9 Pm+LyGvc4wQ== X-Google-Smtp-Source: AGHT+IF6qbV42OSMgEB/L2JOEi7E6FqjbgD2fsncm8r6Nqy7IPKImoaTuEIAXwkZoxK9ENk1RCq0tlxAz2mg X-Received: from pjh5.prod.google.com ([2002:a17:90b:3f85:b0:311:485b:d057]) (user=afranji job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3b8b:b0:311:e9ac:f5ce with SMTP id 98e67ed59e1d1-313c08bbb9dmr724334a91.21.1749676615444; Wed, 11 Jun 2025 14:16:55 -0700 (PDT) Date: Wed, 11 Jun 2025 21:16:27 +0000 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.50.0.rc1.591.g9c95f17f64-goog Message-ID: Subject: [RFC PATCH v2 00/10] Add TDX intra-host migration support From: Ryan Afranji To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: sagis@google.com, bp@alien8.de, chao.p.peng@linux.intel.com, dave.hansen@linux.intel.com, dmatlack@google.com, erdemaktas@google.com, isaku.yamahata@intel.com, kai.huang@intel.com, mingo@redhat.com, pbonzini@redhat.com, seanjc@google.com, tglx@linutronix.de, zhi.wang.linux@gmail.com, ackerleytng@google.com, andrew.jones@linux.dev, david@redhat.com, hpa@zytor.com, kirill.shutemov@linux.intel.com, linux-kselftest@vger.kernel.org, tabba@google.com, vannapurve@google.com, yan.y.zhao@intel.com, rick.p.edgecombe@intel.com, Ryan Afranji Hello, This is RFC v2 for the TDX intra-host migration patch series. It addresses comments in RFC v1 [1] and is rebased onto the latest kvm/next (v6.16-rc1). This patchset was built on top of the latest TDX selftests [2] and gmem linking [3] RFC patch series. Here is the series stitched together for your convenience: https://github.com/googleprodkernel/linux-cc/tree/tdx-copyless-rfc-v2 Changes from RFC v1: + Added patch to prevent deadlock warnings by re-ordering locking order. + Added patch to allow vCPUs to be created for uninitialized VMs. + Minor optimizations to TDX intra-host migration core logic. + Moved lapic state transfer into TDX intra-host migration core logic. + Added logic to handle posted interrupts that are injected during migration. + Added selftests. + Addressed comments from RFC v1. + Various small changes to make patchset compatible with latest version of kvm/next. [1] https://lore.kernel.org/lkml/20230407201921.2703758-2-sagis@google.com [2] https://lore.kernel.org/lkml/20250414214801.2693294-2-sagis@google.com [3] https://lore.kernel.org/all/cover.1747368092.git.afranji@google.com Ackerley Tng (2): KVM: selftests: Add TDX support for ucalls KVM: selftests: Add irqfd/interrupts test for TDX with migration Ryan Afranji (3): KVM: x86: Adjust locking order in move_enc_context_from KVM: TDX: Allow vCPUs to be created for migration KVM: selftests: Refactor userspace_mem_region creation out of vm_mem_add Sagi Shahar (5): KVM: Split tdp_mmu_pages to mirror and direct counters KVM: TDX: Add base implementation for tdx_vm_move_enc_context_from KVM: TDX: Implement moving mirror pages between 2 TDs KVM: TDX: Add core logic for TDX intra-host migration KVM: selftests: TDX: Add tests for TDX in-place migration arch/x86/include/asm/kvm_host.h | 7 +- arch/x86/kvm/mmu.h | 2 + arch/x86/kvm/mmu/mmu.c | 66 ++++ arch/x86/kvm/mmu/tdp_mmu.c | 72 +++- arch/x86/kvm/mmu/tdp_mmu.h | 6 + arch/x86/kvm/svm/sev.c | 13 +- arch/x86/kvm/vmx/main.c | 12 +- arch/x86/kvm/vmx/tdx.c | 236 +++++++++++- arch/x86/kvm/vmx/x86_ops.h | 1 + arch/x86/kvm/x86.c | 14 +- tools/testing/selftests/kvm/Makefile.kvm | 2 + .../testing/selftests/kvm/include/kvm_util.h | 25 ++ .../selftests/kvm/include/x86/tdx/tdx_util.h | 3 + .../selftests/kvm/include/x86/tdx/test_util.h | 5 + .../testing/selftests/kvm/include/x86/ucall.h | 4 +- tools/testing/selftests/kvm/lib/kvm_util.c | 222 ++++++++---- .../testing/selftests/kvm/lib/ucall_common.c | 2 +- .../selftests/kvm/lib/x86/tdx/tdx_util.c | 63 +++- .../selftests/kvm/lib/x86/tdx/test_util.c | 17 + tools/testing/selftests/kvm/lib/x86/ucall.c | 108 ++++-- .../kvm/x86/tdx_irqfd_migrate_test.c | 264 ++++++++++++++ .../selftests/kvm/x86/tdx_migrate_tests.c | 337 ++++++++++++++++++ 22 files changed, 1349 insertions(+), 132 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86/tdx_irqfd_migrate_test.c create mode 100644 tools/testing/selftests/kvm/x86/tdx_migrate_tests.c