>>> On 10.09.15 at 14:58, <ian.campbell@xxxxxxxxxx> wrote: > On Thu, 2015-09-10 at 13:15 +0100, Mark Rutland wrote: > >> > In any case this should be separate from the shim ABI discussion. >> >> I disagree; I think this is very much relevant to the ABI discussion. >> That's not to say that I insist on a particular approach, but I think >> that they need to be considered together. > > Taking a step back, the reason for using the EFI stub parameters is only > (AFAIK) in order to be able to locate the ACPI RDSP (the root table > pointer), which as it happens is normally passed via one of the EFI > firmware tables. > > If there was a way to achieve that goal (i.e. another way to find the RSDP) > without opening the can of UEFI worms then we could consider that opiton > too. > > a way != the legacy x86 thing of scanning low memory of the signature, of > course. But even x86 doesn't do that (other than as a fallback) on EFI. The configuration table is available to Dom0 (via XENPF_firmware_info: XEN_FW_EFI_INFO:XEN_FW_EFI_CONFIG_TABLE). Jan -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
