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SubjectRe: [PATCH v3 0/3] xen: re-enable booting as Xen PVH guest
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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.wysocki@intel.com>


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