(add linux-samsung-soc mail list to cc) On Tue, Oct 6, 2015 at 11:37 AM, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Tuesday 06 October 2015 11:23:58 Pavel Fedin wrote: >> Exynos platform officially uses "multi-core timer" AKA MCT. However, it >> also has a possibility to access the same timer using CP15 (AKA >> architected timer) registers. >> >> In order to be able to use KVM, we need CP15 timer support. In its turn, >> MCT needs to be turned on before any accesses will work. This patchset >> allows to specify "CP15 compatibility mode" for the MCT by inserting >> armv7-timer node as a child for MCT device. In this case MCT driver will >> only enable the timer, leaving the rest for architected timer driver. > > IIRC the use of the CP15 timer is not reliable on this platform. > I don't have a link ready, but this has come up a few times. > > Kukjin Kim probably knows the details. Please take a look: http://www.gossamer-threads.com/lists/linux/kernel/2225900 for some details. I don't know if it's related to 5410. Best regards, Alexey Klimov -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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