On Sun, 2018-06-17 at 07:22 +0800, Bin Meng wrote: > 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.
Indeed. There were a discussion to not apply it for now. -- Andy Shevchenko <[email protected]> Intel Finland Oy _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
