On Tue, 2006-05-30 at 16:41 -0400, konradr@xxxxxxxxxx wrote: > On Tue, May 30, 2006 at 12:38:01PM -0700, Jeremy Fitzhardinge wrote: > > [snip] > > > > So the MCFG entry is in the ACPI NVS region of the E820 table. Is this > > bad? > > Not at all. The ACPI v3.0 specs mentions that: > > "ACPI NVS Memory. This range of addresses is in use or reserve by > the system and must not be used by the operating system. This > range is required to be saved and restored across an NVS sleep." I actually misread the tables. It appears that MCFG (at 0x7f6e2e36) is in ACPI Data (7f6d0000 - 7f6e3000). include/asm-i386/e820.h says that memory marked as "E820_ACPI" can be reused as normal memory once the ACPI tables have been read. Doesn't this mean that the MCFG memory could end up being used as general system memory? That seems bad if MCFG memory is some kind of MMIO space. Or is the comment simply wrong? (I don't really know what this stuff is, so maybe I'm just pointlessly worrying.) J - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
