* Re: kvm vmx shadow paging question [not found] <9253e6f9-8c49-97e6-b602-6e93e2977c3c@nextfour.com> @ 2016-08-13 15:47 ` Mika Penttilä 2016-08-15 14:12 ` Mika Penttilä 0 siblings, 1 reply; 2+ messages in thread From: Mika Penttilä @ 2016-08-13 15:47 UTC (permalink / raw) To: kvm, LKML On 13.08.2016 17:38, Mika Penttilä wrote: > Hi, > > While studying the vmx code, and the shadow page tables usage (no ept involved), > I wondered the GUEST_CR3 usage. If no ept, GUEST_CR3 points to the shadow tables. > But the format of sptes is always 64 bit. How is that with 32 bit hosts, is the GUEST_CR3 > similar to EPT format, 4 level 64 bit always or how is this working on 32 bit? > > Thanks, > Mika > Hmm seems non PAE 32 bit host without ept enabled is not supported combination, right ? --Mika ^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: kvm vmx shadow paging question 2016-08-13 15:47 ` kvm vmx shadow paging question Mika Penttilä @ 2016-08-15 14:12 ` Mika Penttilä 0 siblings, 0 replies; 2+ messages in thread From: Mika Penttilä @ 2016-08-15 14:12 UTC (permalink / raw) To: kvm, LKML On 13.08.2016 18:47, Mika Penttilä wrote: > On 13.08.2016 17:38, Mika Penttilä wrote: > >> Hi, >> >> While studying the vmx code, and the shadow page tables usage (no ept involved), >> I wondered the GUEST_CR3 usage. If no ept, GUEST_CR3 points to the shadow tables. >> But the format of sptes is always 64 bit. How is that with 32 bit hosts, is the GUEST_CR3 >> similar to EPT format, 4 level 64 bit always or how is this working on 32 bit? >> >> Thanks, >> Mika >> > Hmm seems non PAE 32 bit host without ept enabled is not supported combination, right ? > > --Mika > > Ping, am I correct that for using shadow mmu with x86 kvm host you need at least 32bit PAE enabled host (because shadow ptes are always 64 bit, in PAE or long format)? --Mika ^ permalink raw reply [flat|nested] 2+ messages in thread
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2016-08-13 15:47 ` kvm vmx shadow paging question Mika Penttilä
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