On 08/02/2011 08:20 PM, Avi Kivity wrote: > On 08/02/2011 02:07 PM, Xiao Guangrong wrote: >> The idea is from Avi: >> | tag instructions that are typically used to modify the page tables, and >> drop >> | shadow if any other instruction is used >> | The list would include, I'd guess, and, or, bts, btc, mov, xchg, cmpxchg, >> and >> | cmpxchg8b >> >> This patch is used to tag the instructions and in the later path, shadow page >> is dropped if it is written by other instructions > > We already have a mechanism for this, the decode tables. Why not add a new > flag, PageTable, and set it on all relevant instructions? >
OK, will do it in the next version. > Note we don't need to actually emulate, just decode, since page_fault can > tell us whether a write failed due to page tables or mmio. > This is a interesting feature. If it happens, i will just drop the shadow pages and retry these instructions directly. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
