[PATCH v2 00/16] Add ACPI support for Xen Dom0 on ARM64

From: Shannon Zhao
Date: Fri Jan 15 2016 - 01:59:21 EST

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

This patch set adds ACPI support for Xen Dom0 on ARM64. The relevant Xen
ACPI on ARM64 design document could be found from [1].

This patch set adds a new FDT node "uefi" under /hypervisor to pass UEFI
information. Introduce a bus notifier of AMBA and Platform bus to map
the new added device's MMIO space. Make Xen domain use
xlated_setup_gnttab_pages to setup grant table and a new hypercall to
get event-channel irq.

Regarding the initialization flow of Linux kernel, it needs to move
xen_early_init() before efi_init(). Then xen_early_init() will check
whether it runs on Xen through the /hypervisor node and efi_init() will
call a new function fdt_find_xen_uefi_params(), to parse those
xen,uefi-* parameters just like the existing efi_get_fdt_params().

And in arm64_enable_runtime_services() it will check whether it runs on
Xen and call another new function xen_efi_runtime_setup() to setup
runtime service instead of efi_native_runtime_setup(). The
xen_efi_runtime_setup() will assign the runtime function pointers with
the functions of driver/xen/efi.c.

And since we pass a /hypervisor node and a /chosen node to Dom0, it
needs to check whether the DTS only contains a /hypervisor node and a
/chosen node in acpi_boot_table_init().

Patches are tested on FVP base model. The corresponding Xen patches can
be fetched from [2].


[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

Changes since v1:
* Rebase on linux mainline and wallclock patch from Stefano
* Refactor AMBA and platform device MMIO map to one file
* Use EFI_PARAVIRT to check if it supports XEN EFI
* Refactor Xen EFI codes
* Address other comments

Shannon Zhao (16):
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/hvm/params: Add a new delivery type for event-channel in
arm/xen: Get event-channel irq through HVM_PARAM when booting with
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
ARM: XEN: Set EFI_PARAVIRT if Xen supports EFI
Xen: EFI: Parse DT parameters for Xen specific UEFI
XEN: EFI: Move x86 specific codes to architecture directory
ARM64: XEN: Initialize Xen specific UEFI runtime services

Documentation/devicetree/bindings/arm/xen.txt | 42 ++++++
arch/arm/xen/enlighten.c | 121 +++++++++++++----
arch/arm64/kernel/acpi.c | 12 +-
arch/arm64/kernel/efi.c | 5 +
arch/arm64/kernel/setup.c | 2 +-
arch/arm64/xen/Makefile | 1 +
arch/arm64/xen/efi.c | 36 +++++
arch/x86/xen/efi.c | 112 ++++++++++++++++
arch/x86/xen/grant-table.c | 57 +-------
drivers/acpi/bus.c | 30 +++++
drivers/firmware/efi/efi.c | 45 ++++++-
drivers/xen/Kconfig | 2 +-
drivers/xen/Makefile | 1 +
drivers/xen/arm-device.c | 183 ++++++++++++++++++++++++++
drivers/xen/efi.c | 174 +++++-------------------
drivers/xen/xlate_mmu.c | 61 +++++++++
include/xen/interface/hvm/params.h | 5 +
include/xen/interface/memory.h | 1 +
include/xen/xen-ops.h | 33 +++--
19 files changed, 689 insertions(+), 234 deletions(-)
create mode 100644 arch/arm64/xen/efi.c
create mode 100644 drivers/xen/arm-device.c