| From: |
| Ryan Afranji <afranji-AT-google.com> |
| To: |
| kvm-AT-vger.kernel.org, linux-kernel-AT-vger.kernel.org, x86-AT-kernel.org |
| Subject: |
| [RFC PATCH v2 00/10] Add TDX intra-host migration support |
| Date: |
| Wed, 11 Jun 2025 21:16:27 +0000 |
| Message-ID: |
| <cover.1749672978.git.afranji@google.com> |
| Cc: |
| sagis-AT-google.com, bp-AT-alien8.de, chao.p.peng-AT-linux.intel.com, dave.hansen-AT-linux.intel.com, dmatlack-AT-google.com, erdemaktas-AT-google.com, isaku.yamahata-AT-intel.com, kai.huang-AT-intel.com, mingo-AT-redhat.com, pbonzini-AT-redhat.com, seanjc-AT-google.com, tglx-AT-linutronix.de, zhi.wang.linux-AT-gmail.com, ackerleytng-AT-google.com, andrew.jones-AT-linux.dev, david-AT-redhat.com, hpa-AT-zytor.com, kirill.shutemov-AT-linux.intel.com, linux-kselftest-AT-vger.kernel.org, tabba-AT-google.com, vannapurve-AT-google.com, yan.y.zhao-AT-intel.com, rick.p.edgecombe-AT-intel.com, Ryan Afranji <afranji-AT-google.com> |
| Archive-link: |
| Article |
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-cop...
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-sag...
[2] https://lore.kernel.org/lkml/20250414214801.2693294-2-sag...
[3] https://lore.kernel.org/all/cover.1747368092.git.afranji@...
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
--
2.50.0.rc1.591.g9c95f17f64-goog
