Hi Andy, On Fri, Jan 12, 2018 at 9:01 PM, Andy Shevchenko <[email protected]> wrote: > On Fri, 2018-01-12 at 17:00 +0800, Bin Meng wrote: >> Hi Andy, >> >> On Thu, Jan 11, 2018 at 1:40 AM, Andy Shevchenko >> <[email protected]> wrote: >> > New field acpi_rsdp_addr, which has been introduced in boot protocol >> > v2.14 [1], in boot parameters tells kernel the exact address of RDSP >> > ACPI table. Knowing it increases robustness of the kernel by >> > avoiding >> > in some cases traversal through a part of physical memory. >> > It will slightly reduce boot time by the same reason. >> > >> > [1] See Linux kernel commit >> > >> > 2f74cbf947f4 ("x86/boot: Add the ACPI RSDP address to struct >> > setup_header::acpi_rdsp_addr") >> >> I don't see this commit id in my linux tree. Is this in some >> custodian's tree? > > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=2 > f74cbf947f45fa082dda8eac1a1f1299a372f49 >
I checked Linux kernel tree, seems the patch of adding acpi_rdsp_addr to setup_header was never accepted. Can you please double check, to see whether we still need this in U-Boot? I built a v4.17 kernel, and the boot protocol is still 2.13. Regards, Bin _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
