Hi, Jan Can you provide details of your test environment? -----Original Message----- From: Jan Kiszka [mailto:jan.kiszka@xxxxxx] Sent: Sunday, April 28, 2013 5:36 PM To: Xu, Xinhao Cc: Nakajima, Jun; kvm@xxxxxxxxxxxxxxx Subject: Re: [PATCH 11/11] nEPT: Provide the correct exit qualification upon EPT On 2013-04-27 08:42, Xu, Xinhao wrote: > From 2df72c1e8e3b167a6008ab11e2a68d734c68e425 Mon Sep 17 00:00:00 2001 > From: Xinhao Xu <xinhao.xu@xxxxxxxxx> > Date: Sat, 27 Apr 2013 05:45:49 +0800 > Subject: [PATCH] nEPT: Check EPT misconfiguration while walking addr & > move pte check code to vmx.c Please fix up the subject when posting a patch in reply to another one. > > I add code to detect EPT misconfiguration and inject it to L1. > Now L1 can correctly go to ept_misconfig handler(instead of wrongly > going to fast_page_fault), it will try to handle mmio page fault, if > failed, it is a real ept misconfiguration. > > For scalability, Xiantao suggests me moving vendor specific code out > from common code. In order to do this, I add new ops in kvm_mmu > struct, check_tdp_pte, to provide an interface to check fault while > walking address. The better way is to do fault detecting at here, but > so far I just have checked ept misconfiguration. More patches will be > added in future. Seems there are some issues remaining. I can boot Linux as L2 when I remove this patch. When it's applied, L2 becomes pretty slow and eventually resets during kernel boot of L2. L1 remains stable. Jan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
