On Monday 23 November 2015 09:14:39 Christopher Covington wrote: > On 11/23/2015 03:15 AM, Arnd Bergmann wrote: > > On Sunday 22 November 2015 21:36:45 Nicolas Pitre wrote: > >> On Sun, 22 Nov 2015, Arnd Bergmann wrote: > > > > Ok, thanks a lot! So the reporting in /proc/cpuinfo clearly matches > > the actual features, and we can just treat this as no LPAE / no IDIV > > for kernel compilation, as nobody ever seems to use THUMB2_KERNEL > > in practice. > > > > PJ4-MP is like Cortex-A15/A7/A12/A17 and supports both IDIV and LPAE, > > which leaves the question whether Scorpion or Krait do the same as > > well, or whether they are outliers and need a special configuration. > > LPAE is only supported in the Krait 450. > > http://www.anandtech.com/show/7537/qualcomms-snapdragon-805-25ghz-128bit-memory-interface-d3d11class-graphics-more > > I'm pretty sure idiv support came earlier, but I don't have the > specifics on hand. I have seen that article, but didn't trust it as a canonical source of information here. If you can confirm that it's right, that would mean that we don't support LPAE on mach-qcom, as the only SoC with Krait 450 seems to be APQ8084, and mainline Linux doesn't run on that. The ones we do support are MSM8x60 (Scorpion), MSM8960 (Krait-without-number),and MSM7874 (Krait 400). Do those all support IDIV but not LPAE? Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
