On Mon, Nov 30, 2009 at 05:03:32PM -0700, Grant Grundler wrote: > On Mon, Nov 30, 2009 at 02:51:44PM -0700, Alex Williamson wrote: > > Prior to 1f82de10 we always initialized the upper 32bits of the > > prefetchable memory window, regardless of the address range used. > > Now we only touch it for a >32bit address, which means the upper32 > > registers remain whatever the BIOS initialized them too. > > > > It's valid for the BIOS to set the upper32 base/limit to > > 0xffffffff/0x00000000, which makes us program prefetchable ranges > > like 0xffffffffabc00000 - 0x00000000abc00000 > > > > Revert the chunk of 1f82de10 that made this conditional so we always > > write the upper32 registers and remove now unused pref_mem64 variable. > > > > Signed-off-by: Alex Williamson <alex.williamson@xxxxxx> > > Reviewed-by: Grant Grundler <grundler@xxxxxxxxxxxxxxxx> NAK this - I messed up. Yinghai is correct. Something else is going on. It might be perfectly OK to read 0xffffffffabc00000 if the bridge isn't using the upper32 Prefetchable register. Maybe the problem is some code is reading the upper32 value without checking that it's valid? grant -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
