Shannon Zhao of Huawei submitted a 17-part patch to the Linux-ARM-kernel, Linux-EFI, Linux-Kernel, and Xen-devel lists, which adds ACPI support for Xen Dom0 on AArch64 systems.
This patch set adds ACPI support for Xen Dom0 on ARM64. The relevant Xen ACPI on ARM64 design document could be found from [1]. The corresponding Xen patches can be fetched from [2].
Xen: ACPI: Hide UART used by Xen
xen/grant-table: Move xlated_setup_gnttab_pages to common place
Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn
arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table
xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio
Xen: ARM: Add support for mapping platform device mmio
Xen: ARM: Add support for mapping AMBA device mmio
Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from Xen
xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ
arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI
ARM: XEN: Move xen_early_init() before efi_init()
ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI
ARM: Xen: Document UEFI support on Xen ARM virtual platforms
XEN: EFI: Move x86 specific codes to architecture directory
ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services
FDT: Add a helper to get specified name subnode
Xen: EFI: Parse DT parameters for Xen specific UEFI
[1] http://lists.xen.org/archives/html/xen-devel/2015-11/msg00488.html
[2] http://git.linaro.org/people/shannon.zhao/xen.git ACPI_XEN_ARM_V3
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