於 四，2013-12-19 於 20:22 -0800，H. Peter Anvin 提到： > On 12/19/2013 08:05 PM, joeyli wrote: > > > > Then that means the priority of PNP0B0x is higher then "CMOS RTC Not > > Present" flag. ACPI spec doesn't have clear definition on this. > > > > According to the Microsoft requirements documents, such a platform is > broken and shouldn't exist. OK~~ > > > I look forward to Borislav's "EFI runtime mapping" to fix the physical > > address accessing issue of EFI time service on x86_64 machines. I tested > > his patches on a issue machine and it works for walk around BIOS bug. > > > > Can we use EFI time services on x86_64 after Borislav's patches accepted > > to mainline? > > > > No. > > -hpa If don't use EFI time, then the first priority is using ACPI TAD if it present. Due to ACPI TAD is a generic acpi device that's need OS parsing DSDT table before set system time. Either move DSDT parser from subsystem initial stage to start_kernel or move timekeeping initial to after DSDT be parsed. Which one you think is more possible and risk less? Then I will try that way. Thanks a lot! Joey Lee -- To unsubscribe from this list: send the line "unsubscribe linux-efi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
