On Tue, Nov 28, 2017 at 10:43 AM, Juergen Gross <jgross@xxxxxxxx> wrote: > In the non-EFI boot path the ACPI RSDP table is currently found via > either EBDA or by searching through low memory for the RSDP magic. > This requires the RSDP to be located in the first 1MB of physical > memory. Xen PVH guests, however, get the RSDP address via the start of > day information block. > > In order to support an arbitrary RSDP address this patch series adds > the physical address of the RSDP to the boot params structure filled > by the boot loader. A kernel booted directly in PVH mode can save the > RSDP address in the boot params, while a kernel booted in PVH mode via > grub can rely on the RSDP address being specified by grub2 (which in > turn got the address via the start of day information block from Xen). > > Juergen Gross (3): > x86/boot: add acpi rsdp address to setup_header > x86/acpi: take rsdp address for boot params if available > x86/xen: supply rsdp address in boot params for pvh guests > > Documentation/x86/boot.txt | 19 +++++++++++++++++++ > arch/x86/boot/header.S | 6 +++++- > arch/x86/include/uapi/asm/bootparam.h | 1 + > arch/x86/xen/enlighten_pvh.c | 2 ++ > drivers/acpi/osl.c | 8 ++++++++ > 5 files changed, 35 insertions(+), 1 deletion(-) > > -- Is this going to work with all existing setups? Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
