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. Juergen Gross (2): x86/acpi: add retrieval function for rsdp address xen: add acpi_arch_get_root_pointer() for pvh guests arch/x86/xen/enlighten_pvh.c | 14 +++++++++++--- drivers/acpi/osl.c | 10 +++++++++- include/linux/acpi.h | 2 ++ 3 files changed, 22 insertions(+), 4 deletions(-) -- 2.13.6 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
