On Mon, Feb 19, 2018 at 12:27 PM, Rafael J. Wysocki
> On 2/19/2018 11:09 AM, Juergen Gross wrote:
>> The Xen PVH boot protocol passes vital information to the kernel via
>> a start_info block. One of the data transferred is the physical address
>> of the RSDP table.
>> Unfortunately PVH support in the kernel didn't use that passed address
>> for RSDP, but relied on the legacy mechanism searching for the RSDP in
>> low memory. After a recent change in Xen putting the RSDP to a higher
>> address booting as PVH guest is now failing.
>> This small series repairs that by passing the RSDP address from the
>> start_info block to ACPI handling.
>> Changes in V3:
>> - instead of using a weak function add a function pointer to x86_init
>> for obtaining the RSDP address
>> Juergen Gross (3):
>> acpi: introduce acpi_arch_get_root_pointer() for getting rsdp address
>> x86/acpi: add a new x86_init_acpi structure to x86_init_ops
>> x86/xen: add pvh specific rsdp address retrieval function
>> arch/x86/include/asm/acpi.h | 7 +++++++
>> arch/x86/include/asm/x86_init.h | 9 +++++++++
>> arch/x86/kernel/x86_init.c | 5 +++++
>> arch/x86/xen/enlighten_pvh.c | 14 +++++++++++---
>> drivers/acpi/osl.c | 5 ++++-
>> include/linux/acpi.h | 7 +++++++
>> 6 files changed, 43 insertions(+), 4 deletions(-)
> The series is fine by me:
> Acked-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Don't know much about Xen, though the ACPI / x86 stubs are exactly
what I'm wanting!
Reviewed-by: Andy Shevchenko <andy.shevche...@gmail.com>
With Best Regards,