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https://github.com/xen-project/xen.git
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Jason Andryuk
36e49fc8cb
Add an entry for the new xl/libxl SMBIOS support. Signed-off-by: Jason Andryuk <jandryuk@gmail.com> Acked-by: Henry Wang <Henry.Wang@arm.com>
171 lines
9.0 KiB
Markdown
171 lines
9.0 KiB
Markdown
# Changelog
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Notable changes to Xen will be documented in this file.
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The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
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## [unstable UNRELEASED](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=staging) - TBD
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### Added
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- On x86, support for features new in Intel Sapphire Rapids CPUs:
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- PKS (Protection Key Supervisor) available to HVM/PVH guests.
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- VM-Notify used by Xen to mitigate certain micro-architectural pipeline
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livelocks, instead of crashing the entire server.
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- Bus-lock detection, used by Xen to mitigate (by rate-limiting) the system
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wide impact of a guest misusing atomic instructions.
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- xl/libxl can customize SMBIOS strings for HVM guests.
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## [4.17.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.17.0) - 2022-12-12
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### Changed
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- On x86 "vga=current" can now be used together with GrUB2's gfxpayload setting. Note that
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this requires use of "multiboot2" (and "module2") as the GrUB commands loading Xen.
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- The "gnttab" option now has a new command line sub-option for disabling the
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GNTTABOP_transfer functionality.
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- The x86 MCE command line option info is now updated.
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### Added / support upgraded
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- Out-of-tree builds for the hypervisor now supported.
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- __ro_after_init support, for marking data as immutable after boot.
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- The project has officially adopted 4 directives and 24 rules of MISRA-C,
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added MISRA-C checker build integration, and defined how to document
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deviations.
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- IOMMU superpage support on x86, affecting PV guests as well as HVM/PVH ones
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when they don't share page tables with the CPU (HAP / EPT / NPT).
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- Support for VIRT_SSBD and MSR_SPEC_CTRL for HVM guests on AMD.
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- Improved TSC, CPU, and APIC clock frequency calibration on x86.
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- Support for Xen using x86 Control Flow Enforcement technology for its own
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protection. Both Shadow Stacks (ROP protection) and Indirect Branch
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Tracking (COP/JOP protection).
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- Add mwait-idle support for SPR and ADL on x86.
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- Extend security support for hosts to 12 TiB of memory on x86.
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- Add command line option to set cpuid parameters for dom0 at boot time on x86.
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- Improved static configuration options on Arm.
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- cpupools can be specified at boot using device tree on Arm.
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- It is possible to use PV drivers with dom0less guests, allowing statically
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booted dom0less guests with PV devices.
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- On Arm, p2m structures are now allocated out of a pool of memory set aside at
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domain creation.
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- Improved mitigations against Spectre-BHB on Arm.
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- Support VirtIO-MMIO devices device-tree binding creation in toolstack on Arm.
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- Allow setting the number of CPUs to activate at runtime from command line
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option on Arm.
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- Grant-table support on Arm was improved and hardened by implementing
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"simplified M2P-like approach for the xenheap pages"
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- Add Renesas R-Car Gen4 IPMMU-VMSA support on Arm.
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- Add i.MX lpuart and i.MX8QM support on Arm.
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- Improved toolstack build system.
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- Add Xue - console over USB 3 Debug Capability.
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- gitlab-ci automation: Fixes and improvements together with new tests.
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### Removed / support downgraded
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- dropped support for the (x86-only) "vesa-mtrr" and "vesa-remap" command line options
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## [4.16.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.16.0) - 2021-12-02
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### Removed
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- XENSTORED_ROOTDIR environment variable from configuartion files and
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initscripts, due to being unused.
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### Changed
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- Quarantining of passed-through PCI devices no longer defaults to directing I/O to a scratch
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page, matching original post-XSA-302 behavior (albeit the change was also backported, first
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appearing in 4.12.2 and 4.11.4). Prior (4.13...4.15-like) behavior can be arranged for
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either by enabling the IOMMU_QUARANTINE_SCRATCH_PAGE setting at build (configuration) time
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or by passing "iommu=quarantine=scratch-page" on the hypervisor command line.
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- pv-grub stubdoms will no longer be built per default. In order to be able to use pv-grub
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configure needs to be called with "--enable-pv-grub" as parameter.
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- qemu-traditional based device models (both, qemu-traditional and ioemu-stubdom) will
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no longer be built per default. In order to be able to use those, configure needs to
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be called with "--enable-qemu-traditional" as parameter.
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- Fixes for credit2 scheduler stability in corner case conditions.
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- Ongoing improvements in the hypervisor build system.
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- vtpmmgr miscellaneous fixes in preparation for TPM 2.0 support.
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- 32bit PV guests only supported in shim mode.
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- Improved PVH dom0 debug key handling.
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- Fix booting on some Intel systems without a PIT (i8254).
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- Cleanup of the xenstore library interface.
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- Fix truncation of return value from xencall2 by introducing a new helper
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that returns a long instead.
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- Fix system register accesses on Arm to use the proper 32/64bit access size.
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- Various fixes for Arm OP-TEE mediator.
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- Switch to domheap for Xen page tables.
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### Added
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- 32bit Arm builds to the gitlab-ci automated tests.
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- x86 full system tests to the gitlab-ci automated tests.
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- Arm limited vPMU support for guests.
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- Static physical memory allocation for dom0less on arm64.
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- dom0less EFI support on arm64.
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- GICD_ICPENDR register handling in vGIC emulation to support Zephyr OS.
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- CPU feature leveling on arm64 platform with heterogeneous cores.
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- Report unpopulated memory regions safe to use for external mappings, Arm and
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device tree only.
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- Support of generic DT IOMMU bindings for Arm SMMU v2.
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- Limit grant table version on a per-domain basis.
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## [4.15.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.15.0) - 2021-04-08
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### Added / support upgraded
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- ARM IOREQ servers (device emulation etc.) (Tech Preview)
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- Renesas IPMMU-VMSA (Supported, not security supported; was Tech Preview)
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- ARM SMMUv3 (Tech Preview)
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- Switched MSR accesses to deny by default policy.
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- Intel Processor Trace support (Tech Preview)
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- Named PCI devices for xl/libxl
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- Improved documentation for xl PCI configuration format
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- Support for zstd-compressed dom0 (x86) and domU kernels
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- EFI: Enable booting unified hypervisor/kernel/initrd/DT images
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- Reduce ACPI verbosity by default
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- Add ucode=allow-same option to test late microcode loading path
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- Library improvements from NetBSD ports upstreamed
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- CI loop: Add Alpine Linux, Ubuntu Focal targets; drop CentOS 6
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- CI loop: Add qemu-based dom0 / domU test for ARM
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- CI loop: Add dom0less aarch64 smoke test
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- x86: Allow domains to use AVX-VNNI instructions
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- Factored out HVM-specific shadow code, improving code clarity and reducing the size of PV-only hypervisor builds
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- Added XEN_SCRIPT_DIR configuration option to specify location for Xen scripts, rather than hard-coding /etc/xen/scripts
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- xennet: Documented a way for the backend (or toolstack) to specify MTU to the frontend
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- xenstore can now be live-updated on a running system. (Tech preview)
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- Some additional affordances in various xl subcommands.
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- Added workarounds for the following ARM errata: Cortex A53 #843419, Cortex A55 #1530923, Cortex A72 #853709, Cortex A73 #858921, Cortex A76 #1286807, Neoverse-N1 #1165522
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- On detecting a host crash, some debug key handlers can automatically triggered to aid in debugging
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- Increase the maximum number of guests which can share a single IRQ from 7 to 16, and make this configurable with irq-max-guests
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### Removed / support downgraded
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- qemu-xen-traditional as host process device model, now "No security
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support, not recommended". (Use as stub domain device model is still
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supported - see SUPPORT.md.)
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## [4.14.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.14.0) - 2020-07-23
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### Added
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- This file and MAINTAINERS entry.
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- Use x2APIC mode whenever available, regardless of interrupt remapping
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support.
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- Performance improvements to guest assisted TLB flushes, either when using
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the Xen hypercall interface or the viridian one.
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- Assorted pvshim performance and scalability improvements plus some bug
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fixes.
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- Hypervisor framework to ease porting Xen to run on hypervisors.
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- Initial support to run on Hyper-V.
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- Initial hypervisor file system (hypfs) support.
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- libxl support for running qemu-xen device model in a linux stubdomain.
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- New 'domid_policy', allowing domain-ids to be randomly chosen.
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- Option to preserve domain-id across migrate or save+restore.
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- Support in kdd for initial KD protocol handshake for Win 7, 8 and 10 (64 bit).
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- Tech preview support for Control-flow Execution Technology, with Xen using
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Supervisor Shadow Stacks for its own protection.
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### Changed
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- The CPUID data seen by a guest on boot is now moved in the migration
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stream. A guest migrating between non-identical hardware will now no
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longer observe details such as Family/Model/Stepping, Cache, etc changing.
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An administrator still needs to take care to ensure the features visible to
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the guest at boot are compatible with anywhere it might migrate.
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## [4.13.0](https://xenbits.xen.org/gitweb/?p=xen.git;a=shortlog;h=RELEASE-4.13.0) - 2019-12-17
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> Pointer to release from which CHANGELOG tracking starts
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