Re: [PATCH v3 0/9] liveupdate: kvm: guest_memfd preservation
| Newsgroups | org.infradead.lists.kexec,org.kernel.vger.kvm,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kvack.linux-mm |
|---|---|
| Message-ID | <[email protected]> |
+ Adding More people to the series (To:) which I missed in my original message. ~Tarun Tarun Sahu <[email protected]> writes: > Hello, > This is Non-RFC patch series for guest_memfd preservation. After > having multiple discussion across hypervisor liveupdate meeting, > guest_memfd bi-weekly meeting, the design for the basic support of > guest_memfd preservation is final. This series is going to include > guest_memfd which are fully shared and does not support private mem > and backed by PAGE_SIZE pages. > > Steps to test: > 1. Compile Kernel with CONFIG_LIVEUPDATE_GUEST_MEMFD=y > 2. boot kernel with command line: kho=on liveupdate=on > 3. run the following kselftest > $ .selftests/kvm/guest_memfd_preservation_test --stage 1 > $ <kexec> --reuse-cmdline > $ .selftests/kvm/guest_memfd_preservation_test --stage 2 > > NOTE: Assert the following: > $ ls /dev/liveupdate > $ ls /dev/kvm > $ dmesg | grep liveupdate # (should have kvm_vm_luo && > # guest_memfd_luo handler registered) > > The changes are rebased on: > kvm/next + liveupdate/next (merge) + [3] + [4] + [5] > Where, > [3]: luo: conversion of serialized_data to KHOSER_PTR > [4]: luo: APIs to retrieve file internally from session > [5]: selftests: liveupdate sefltests library > Here is the github repo: > https://github.com/tar-unix/linux/tree/gmem-pre > > V3 <- RFC V2 [2] > 1. Finalize the design > 2. resolve sashiko reported bugs > 3. Use of KHOSER_PTR instead of raw serialized_data as per [3] > > RFC V2 [2] <- RFC V1 [1] > 1. Removed mem_attr_array as it is not needed for fully-shared > 2. Removed pre-faulted condition > 3. Added vm_type preservation for ARM64. > 4. Removed liveupdate_get_file_incoming api patch as it is sent > separately [4] by Samiullah. > > [1] https://lore.kernel.org/all/[email protected]/ > [2] https://lore.kernel.org/all/c054ba0fb2639932bbe354420d3f4f84cce84905.1780676742.git.tarunsahu@google.com/ > [3] https://lore.kernel.org/all/[email protected]/ > [4] https://lore.kernel.org/all/[email protected]/ > [5] https://lore.kernel.org/all/[email protected]/ > > Tarun Sahu (9): > liveupdate: Add LIVEUPDATE_GUEST_MEMFD config option > kvm: Prepare core VM structs and helpers for LUO support > kvm: kvm_luo: Allow kvm preservation with LUO > kvm: guest_memfd: Move internal definitions and helper to new header > kvm: guest_memfd: Add support for freezing and unfreezing mappings > kvm: guest_memfd_luo: add support for guest_memfd preservation > docs: add documentation for guest_memfd preservation via LUO > selftests: kvm: Split ____vm_create() to expose init helpers > selftests: kvm: Add guest_memfd_preservation_test > > Documentation/core-api/liveupdate.rst | 1 + > Documentation/liveupdate/vmm.rst | 107 ++++ > MAINTAINERS | 14 + > include/linux/kho/abi/kvm.h | 106 ++++ > include/linux/kvm_host.h | 14 + > kernel/liveupdate/Kconfig | 15 + > tools/testing/selftests/kvm/Makefile.kvm | 6 +- > .../kvm/guest_memfd_preservation_test.c | 236 +++++++++ > .../testing/selftests/kvm/include/kvm_util.h | 2 + > tools/testing/selftests/kvm/lib/kvm_util.c | 26 +- > virt/kvm/Makefile.kvm | 1 + > virt/kvm/guest_memfd.c | 185 +++++-- > virt/kvm/guest_memfd.h | 44 ++ > virt/kvm/guest_memfd_luo.c | 497 ++++++++++++++++++ > virt/kvm/kvm_luo.c | 195 +++++++ > virt/kvm/kvm_main.c | 94 +++- > virt/kvm/kvm_mm.h | 15 + > 17 files changed, 1477 insertions(+), 81 deletions(-) > create mode 100644 Documentation/liveupdate/vmm.rst > create mode 100644 include/linux/kho/abi/kvm.h > create mode 100644 tools/testing/selftests/kvm/guest_memfd_preservation_test.c > create mode 100644 virt/kvm/guest_memfd.h > create mode 100644 virt/kvm/guest_memfd_luo.c > create mode 100644 virt/kvm/kvm_luo.c > > -- > 2.55.0.rc0.786.g65d90a0328-goog