xen: update to 4.18-tip

Bumping xen to version RELEASE-4.17.0-89-ge4a5fb9227, which comprises the following commits:

    e4a5fb9227 CI: Remove llvm-8 from the Debian Stretch container
    435a1e5e8f automation: Remove non-debug x86_32 build jobs
    8c414bab30 automation: Remove CentOS 7.2 containers and builds
    e3b23da4a1 automation: Switch arm32 cross builds to run on arm64
    4c0d792675 CI: Drop automation/configs/
    7758cd57e0 ns16550: correct name/value pair parsing for PCI port/bridge
    85100ed78c vpci/msix: handle accesses adjacent to the MSI-X table
    3506935824 include: don't mention stub headers more than once in a make rule
    7f55774489 x86/ucode: Fix error paths control_thread_fn()
    f6a3e93b37 x86/vmx: Don't spuriously crash the domain when INIT is received
    11c8ef59b9 x86/shadow: Fix build with no PG_log_dirty
    00aa5c93d1 x86/nospec: Fix evaluate_nospec() code generation under Clang
    6f2d89d681 x86/shadow: fix and improve sh_page_has_multiple_shadows()
    33b1c8cd86 VT-d: fix iommu=no-igfx if the IOMMU scope contains fake device(s)
    3c85fb7b65 AMD/IOMMU: without XT, x2APIC needs to be forced into physical mode
    3eac216e6e libacpi: fix PCI hotplug AML
    7082d656ae bunzip: work around gcc13 warning
    f971f5c531 VT-d: constrain IGD check
    d84612ecab x86/altp2m: help gcc13 to avoid it emitting a warning
    b5409f4e4d core-parking: fix build with gcc12 and NR_CPUS=1
    b4dad09bb2 x86/spec-ctrl: Add BHI controls to userspace components
    244d39fb13 tools/xenmon: Fix xenmon.py for with python3.x
    651ffe2c78 tools/python: change 's#' size type for Python >= 3.10
    b745ff3011 x86/vmx: implement Notify VM Exit
    27abea1ba6 x86/vmx: introduce helper to set VMX_INTR_SHADOW_NMI
    83f12e4eaf x86/vmx: implement VMExit based guest Bus Lock detection
    a730e4d119 x86/spec-ctrl: Defer CR4_PV32_RESTORE on the cstar_enter path
    a2a915b396 x86/HVM: serialize pinned cache attribute list manipulation
    d0cb66d59a x86/HVM: bound number of pinned cache attribute regions
    f8f8f07880 x86/shadow: account for log-dirty mode when pre-allocating
    ec5b058d2a x86/ucode/AMD: late load the patch on every logical thread
    fa8250f192 libs/guest: Fix leak on realloc failure in backup_ptes()
    01f85d835b libs/guest: Fix resource leaks in xc_core_arch_map_p2m_tree_rw()
    53bd16bcc0 tools: Use PKG_CONFIG_FILE instead of PKG_CONFIG variable
    b10cf1561a xen: Fix Clang -Wunicode diagnostic when building asm-macros
    837bdc6eb2 xen: Work around Clang-IAS macro \@ expansion bug
    e8f28e129d x86: perform mem_sharing teardown before paging teardown
    e9a7942f6c x86/ucode/AMD: apply the patch early on every logical thread
    46c104cce0 build: make FILE symbol paths consistent
    74b76704fd credit2: respect credit2_runqueue=all when arranging runqueues
    8202b9cf84 x86/shskt: Disable CET-SS on parts susceptible to fractured updates
    cdc23d47ad x86/cpuid: Infrastructure for leaves 7:1{ecx,edx}
    c622b8ace9 libs/util: Fix parallel build between flex/bison and CC rules
    aaf74a532c automation: Remove clang-8 from Debian unstable container
    3685e754e6 x86/spec-ctrl: Mitigate Cross-Thread Return Address Predictions
    587823eca1 tools/ocaml/libs: Fix memory/resource leaks with caml_alloc_custom()
    bf935b1ff7 tools/ocaml/xc: Don't reference Abstract_Tag objects with the GC lock released
    afdcc10856 tools/ocaml/xc: Fix binding for xc_domain_assign_device()
    021b82cc0c tools/ocaml/evtchn: Don't reference Custom objects with the GC lock released
    5797b798a5 tools/ocaml/libs: Allocate the correct amount of memory for Abstract_tag
    2c21e1bee6 tools/ocaml/libs: Don't declare stubs as taking void
    e74d868b48 tools/oxenstored: validate config file before live update
    f0e653fb4a tools/ocaml/xb: Drop Xs_ring.write
    7d516fc876 tools/ocaml/xb,mmap: Use Data_abstract_val wrapper
    5d8f9cfa16 tools/ocaml/xenctrl: Use larger chunksize in domain_getinfolist
    03f545b6cf tools/ocaml/xenctrl: Make domain_getinfolist tail recursive
    3dae50283d libxl: fix guest kexec - skip cpuid policy
    d012788137 ns16550: fix an incorrect assignment to uart->io_size
    819a5d4ed8 build: fix building flask headers before descending in flask/ss/
    2d74e7035b x86/shadow: fix PAE check for top-level table unshadowing
    e904d8ae01 x86/vmx: Support for CPUs without model-specific LBR
    5e3250258a x86/vmx: Calculate model-specific LBRs once at start of day
    c871e05e13 include/compat: produce stubs for headers not otherwise generated
    1d7a388e7b tools: Fix build with recent QEMU, use "--enable-trace-backends"
    a470a83c36 x86/S3: Restore Xen's MSR_PAT value on S3 resume
    2f8851c37f Revert "tools/xenstore: simplify loop handling connection I/O"
    c4972a4272 tools/oxenstored: Render backtraces more nicely in Syslog
    91a9ac6e9b tools/oxenstored/syslog: Avoid potential NULL dereference
    e13a9a2146 tools/oxenstored: Set uncaught exception handler
    991b512f5f tools/oxenstored: Log live update issues at warning level
    f02171b663 tools/oxenstored: Keep /dev/xen/evtchn open across live update
    4b418768ef tools/oxenstored: Rework Domain evtchn handling to use port_pair
    a20daa7ffd tools/oxenstored: Implement Domain.rebind_evtchn
    fd0d9b0597 tools/oxenstored: Rename some 'port' variables to 'remote_port'
    bc5cc00868 tools/oxenstored: Bind the DOM_EXC VIRQ in in Event.init()
    0929960173 tools/oxenstored: Style fixes to Domain
    c7cf603836 tools/ocaml/evtchn: Extend the init() binding with a cloexec flag
    24d9dc2ae2 tools/ocaml/evtchn: Add binding for xenevtchn_fdopen()
    d11528a993 tools/ocaml/evtchn: OCaml 5 support, fix potential resource leak
    2e8d7a08bc tools/oxenstored: Fix incorrect scope after an if statement
    a7a26da0b5 x86/time: prevent overflow with high frequency TSCs
    1dcc9b6dfe EFI: relocate the ESRT when booting via multiboot2
    c3e37c60fb ioreq_broadcast(): accept partial broadcast success
    26f39b3d70 x86/HVM: don't mark evtchn upcall vector as pending when vLAPIC is disabled
    5810edc049 x86/Viridian: don't mark IRQ vectors as pending when vLAPIC is disabled
    54bb56e128 x86/HVM: don't mark external IRQs as pending when vLAPIC is disabled
    b7b34bd66a x86/pvh: do not forward MADT Local APIC NMI structures to dom0
    9cbc04a95f x86/irq: do not release irq until all cleanup is done
    0b999fa2ea update Xen version to 4.17.1-pre
    11560248ff Use EfiACPIReclaimMemory for ESRT
    d50a866d88 SUPPORT.md: Define support lifetime
    4aa115ea4e Set 4.17 version
    7b96d2d71b CHANGELOG: Set 4.17 release date and tag
    9da9560a53 README: make heading say 4.17
    74e2a324e8 Config.mk: Bump tags to 4.17.0 final
    100c3416b5 x86/HVM+shim: fix build when !CONFIG_GRANT_TABLE
    942f881eb1 tools/include: fix clean and rework COPYING for installed Xen public header
    894a7786c8 Turn off debug by default
    d86fb95cfd SUPPORT.md: Set Releases Notes link
    f51079b5d8 Config.mk: switch to named tags (for stable branch)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

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