21 Feb
2011
21 Feb
'11
5:56 p.m.
- On (some versions of?) Versatile Express SMP Cortex-A9 SMP boards, a CPU
errata (#720789) causes TLB flushes to sometime fail, which can lead to random problems when running GDB in SMP mode (and probably elsewhere). There is a kernel work-around for this problem activated by CONFIG_ARM_ERRATA_720789, but this is unfortuantely not active on the Linaro kernels. (On OMAP4, this happens automatically due to an entry in mach-omap2/Kconfig. There is no such entry in mach-vexpress/Kconfig currently.)
Could you send a patch to Russell for that?
I have a patch that enables some other workarounds that we probably want enabled for the VE as well. I can CC you (Ulrich) on that if you'd prefer?
Will