From mboxrd@z Thu Jan  1 00:00:00 1970
From: Valentine Sinitsyn <valentine.sinitsyn@gmail.com>
Subject: Re: Nested paging in nested SVM setup
Date: Thu, 21 Aug 2014 18:28:47 +0600
Message-ID: <53F5E5FF.90604@gmail.com>
References: <53A179C4.9060203@gmail.com> <53A18A6D.2050407@siemens.com> <53F44440.6070408@gmail.com> <53F44645.2000708@redhat.com> <53F45036.1070309@gmail.com> <53F45832.5080708@redhat.com> <53F59192.3070500@gmail.com> <53F5B250.3000206@gmail.com> <53F5D709.3060207@redhat.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
To: Paolo Bonzini <pbonzini@redhat.com>,
	Jan Kiszka <jan.kiszka@siemens.com>, kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from mail-la0-f53.google.com ([209.85.215.53]:64131 "EHLO
	mail-la0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1753792AbaHUM2w (ORCPT <rfc822;kvm@vger.kernel.org>);
	Thu, 21 Aug 2014 08:28:52 -0400
Received: by mail-la0-f53.google.com with SMTP id gl10so8412906lab.40
        for <kvm@vger.kernel.org>; Thu, 21 Aug 2014 05:28:50 -0700 (PDT)
In-Reply-To: <53F5D709.3060207@redhat.com>
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

On 21.08.2014 17:24, Paolo Bonzini wrote:
> It seems to work for VMX (see the testcase I just sent).  For SVM, can you
> check if this test works for you, so that we can work on a simple testcase?
It passes for SVM, too.

However, npt_rsvd seems to be broken - maybe that is the reason?

Also, I tried to use different register values for npt_l1mmio_test() and 
npt_l1mmio_check() (like 0xfee00030 and 0xfee00400), but got test passed 
as well. Could it be a false positive then?

> qemu-system-x86_64 -enable-kvm -device pc-testdev -device isa-debug-exit,iobase=0xf4,iosize=0x4 -display none -serial stdio -device pci-testdev -kernel x86/svm.flat -cpu host
> enabling apic
> paging enabled
> cr0 = 80010011
> cr3 = 7fff000
> cr4 = 20
> NPT detected - running all tests with NPT enabled
> null: PASS
> vmrun: PASS
> ioio: PASS
> vmrun intercept check: PASS
> cr3 read intercept: PASS
> cr3 read nointercept: PASS
> next_rip: PASS
> mode_switch: PASS
> asid_zero: PASS
> sel_cr0_bug: PASS
> npt_nx: PASS
> npt_us: PASS
> npt_rsvd: FAIL
> npt_rw: PASS
> npt_pfwalk: PASS
> npt_l1mmio: PASS
>     Latency VMRUN : max: 93973 min: 22447 avg: 22766
>     Latency VMEXIT: max: 428760 min: 23039 avg: 23832
> latency_run_exit: PASS
>     Latency VMLOAD: max: 35697 min: 3828 avg: 3937
>     Latency VMSAVE: max: 42953 min: 3889 avg: 4012
>     Latency STGI:   max: 42961 min: 3517 avg: 3595
>     Latency CLGI:   max: 41177 min: 2859 avg: 2924
> latency_svm_insn: PASS
>
> SUMMARY: 18 TESTS, 1 FAILURES
> Return value from qemu: 3

Valentine