Hi, On Mon, Mar 09, 2015 at 02:10:37PM +0200, Boaz Harrosh wrote: > On 03/06/2015 01:09 AM, Andy Lutomirski wrote: > <> > > > > I will be shocked if a standard of this form ever appears. Modern > > systems *don't have e820*. The BIOSes that are using this type 12 > > hack are awful throwbacks. > > So far the systems we have, with DDR4 NvDIMM(s) (Actual chips arriving soon) > still have BIOS (On by default). The BIOS was yelled "Wolfe" for so long NOW > ;-) > Again these are working system in the field, who will switch them all to UEFI? > > How will the UEFI present them to the system? can you point me to the relevant > code? (Or did you mean BIOS but with a different communication path than > e820?) >
Per my understand... With EFI Boot Stub, there have setup_e820() codes in arch/x86/boot/compressed/eboot.c that used to transfer EFI memmap to e820 entries. Currently doesn't have any EFI_MEMORY_TYPE reflects to NvDIMM that will map to e820_type. I wonder what kind of EFI_MEMORY_TYPE reported by UEFI BIOS on those "shipped NvDIMMs motherboards", like supermicro X9DRH-iF-NV. Then we may need add code to setup_e820() for mapping the efi memory type to e820 type 12 region. > > > > --Andy > > > > Thanks > Boaz > Thanks a lot! Joey Lee -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
