Re: Watchdog timer per hart?
Aaron Durbin
On Wed, Mar 2, 2022 at 12:35 AM James Robinson <jrobinson@...> wrote: Hi Greg, If one is operating the machine with 16 harts without any sharding or partitioning, I don't see why one would need a watchdog per hart. System watchdogs, or TCO timers from other architecture's parlance, are for system use. Now a core would normally have it's own watchdog for instruction retirement forward progress purposes, but that's a completely different use-case than the intention of a system level watchdog. As for Greg's question about putting that in OS-A SEE or a Platform itself, I'm open to suggestions. However, my initial thinking is that it would be deferred to a Platform. The thinking is that OS-A SEE is about targeting SW expectations for the kernel. Kernels are really good about runtime binding of drivers based on the presence of hardware so I'm not overly inclined to mandate such things. That said, I'd be open to hear other opinions.
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