Re: [Xen-devel] [PATCH 00/14] Xen ARM DomU ACPI support

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, May 31, 2016 at 12:43:22PM +0800, Shannon Zhao wrote:
> From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
> 
> The design of this feature is described as below.
> Firstly, the toolstack (libxl) generates the ACPI tables according the
> number of vcpus and gic controller.

CC-ing Boris - who has been working on exposing ACPI tables
for PVH guests.

Is there some way of re-using some of the code? 
> 
> Then, it copies these ACPI tables to DomU memory space and passes
> them to UEFI firmware through the "ARM multiboot" protocol.
> 
> At last, UEFI gets the ACPI tables through the "ARM multiboot" protocol
> and installs these tables like the usual way and passes both ACPI and DT
> information to the Xen DomU.
> 
> Currently libxl only generates RSDP, XSDT, GTDT, MADT, FADT, DSDT tables
> since it's enough now.
> 
> This has been tested using guest kernel with the Dom0 ACPI support
> patches which could be fetched from:
> https://git.kernel.org/cgit/linux/kernel/git/mfleming/efi.git/log/?h=efi/arm-xen
> 
> Shannon Zhao (14):
>   libxl/arm: Fix the function name in error log
>   libxl/arm: Factor out codes for generating DTB
>   libxc: Add placeholders for ACPI tables blob and size
>   tools: add ACPI tables relevant definitions
>   libxl/arm: Construct ACPI GTDT table
>   libxl/arm: Construct ACPI FADT table
>   libxl/arm: Construct ACPI DSDT table
>   libxl/arm: Construct ACPI MADT table
>   libxl/arm: Construct ACPI XSDT table
>   libxl/arm: Construct ACPI RSDP table
>   libxl/arm: Initialize domain param HVM_PARAM_CALLBACK_IRQ
>   libxl/arm: Add ACPI module
>   libxl/arm: initialize memory information of ACPI blob
>   libxc/xc_dom_core: Copy ACPI tables to guest memory space
> 
>  tools/libxc/include/acpi_defs.h | 277 ++++++++++++++++++++++++++++++++
>  tools/libxc/include/xc_dom.h    |  17 ++
>  tools/libxc/xc_dom_arm.c        |  16 +-
>  tools/libxc/xc_dom_core.c       |  59 +++++++
>  tools/libxl/libxl_arm.c         | 345 
> +++++++++++++++++++++++++++++++++++++++-
>  5 files changed, 706 insertions(+), 8 deletions(-)
>  create mode 100644 tools/libxc/include/acpi_defs.h
> 
> -- 
> 2.0.4
> 
> 
> 
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