Re: [Xen-devel] How to turn on EPT support?

["Superymk" <superymkxen@xxxxxxxxxxx>]

All right, I'll verify it. Can I really modify it on the xen wiki? I've 
never dreamed about that. :)
--------------------------------------------------
From: "PasiKärkkäinen" <pasik@xxxxxx>
Sent: Wednesday, January 27, 2010 7:26 PM
To: "Superymk" <superymkxen@xxxxxxxxxxx>
Cc: <xen-devel@xxxxxxxxxxxxxxxxxxx>; "Li, Xin" <xin.li@xxxxxxxxx>
Subject: Re: [Xen-devel] How to turn on EPT support?

> On Wed, Jan 27, 2010 at 06:49:20PM +0800, Superymk wrote:
> >    Thanks. I tailor the hvm example configuration file in xen manually
> >    instead of using Virtual Machine Manager. I use your method to verify 
> > it
> >    and the problem is solved now.
> >    However I find that hap configuration belongs to the Timers category 
> > in
> >    Xen Configurations Details
> >    ([1]http://www.xen.org/files/Support/XenConfigurationDetails.pdf), is 
> > it a
> >    mistake?
> Here's the wiki version of the pdf, created just yesterday:
> http://wiki.xensource.com/xenwiki/XenConfigurationFileOptions
>
> It's easy to edit and fix the stuff in the wiki now :)
>
> -- Pasi
>
> >    Miao
> >    From: [2]Li, Xin
> >    Sent: Wednesday, January 27, 2010 5:53 PM
> >    To: [3]Zhang, Xiantao ; [4]Superymk ; [5]xen-devel@xxxxxxxxxxxxxxxxxxx
> >    Cc: [6]ken.mingyuan@xxxxxxxxxxx
> >    Subject: RE: [Xen-devel] How to turn on EPT support?
> >
> >    i7 965 has EPT support.
> >
> >    Use command *xm debug-k v; xm dmesg* to see if EPT pointer is 0. If 0 
> > then
> >    EPT should disabled for the guest.
> >
> >    as Xiantao mentioned, I guess your hap in config file is set to 0. By
> >    default if you don*t set it, ept should be enabled.
> >
> >    Thanks!
> >
> >    -Xin
> >
> >
> >
> >    From: [7]xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> >    [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Zhang, 
> > Xiantao
> >    Sent: Wednesday, January 27, 2010 5:09 PM
> >    To: Superymk; [8]xen-devel@xxxxxxxxxxxxxxxxxxx
> >    Cc: [9]ken.mingyuan@xxxxxxxxxxx
> >    Subject: RE: [Xen-devel] How to turn on EPT support?
> >
> >
> >
> >    Can you check Xen's boot log to see whether the sentence as following 
> > is
> >    printed out ?
> >
> >
> >
> >    (XEN) HVM: Hardware Assisted Paging detected.
> >
> >
> >
> >    I don't know Xen-3.4.2's policy for EPT's default option, maybe you 
> > can
> >    add "hap=1" in your configuration file to ensure EPT on when you 
> > create
> >    virtual machine  if the system supports it.
> >
> >
> >
> >    Xiantao
> >
> >
> >
> >    --------------------------------------------------------------------------
> >
> >    From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> >    [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Superymk
> >    Sent: Wednesday, January 27, 2010 2:42 PM
> >    To: xen-devel@xxxxxxxxxxxxxxxxxxx
> >    Cc: ken.mingyuan@xxxxxxxxxxx
> >    Subject: [Xen-devel] How to turn on EPT support?
> >
> >    To test if EPT is enabled on my machine, I add some codes in my own 
> > xen
> >    shadow and create a guest vm (named testvm) by Virtual Machine 
> > Manager.
> >    However, it seems that testvm doesn't use EPT at all (See the log). So 
> > how
> >    to turn on EPT support? I thought it should be enabled automatically.
> >
> >
> >
> >    My box is configured as:
> >
> >    Intel Core i7 965
> >
> >    2G*3 DDR3 1333
> >
> >    Seagate 1T
> >
> >
> >
> >    Centos 5.2
> >
> >    Xen-3.4.2 with linux 2.6.18 xenified kernel (downloaded from xen.org)
> >
> >
> >
> >    Log:
> >
> >    (XEN) (Joan)domain.c:388: Domain ID 32767
> >    (XEN) (Joan)domain.c:389: is_hvm_domain(d) 0
> >    (XEN) (Joan)domain.c:390: hvm_funcs.hap_supported 0
> >    (XEN) (Joan)domain.c:391: (domcr_flags & DOMCRF_hap) 0
> >    (XEN) (Joan)p2m.c:1464: is_hvm_domain(d)  0
> >    (XEN) (Joan)p2m.c:1465: d->arch.hvm_domain.hap_enabled 0
> >    (XEN) (Joan)p2m.c:1466: X86_VENDOR_INTEL 1
> >    (XEN) (Joan)p2m.c:1473: d->arch.p2m->set_entry FFFF828C8019FD50
> >    (XEN) (Joan)p2m.c:1474: p2m_set_entry FFFF828C8019FD50
> >    (XEN) (Joan)domain.c:388: Domain ID 0
> >    (XEN) (Joan)domain.c:389: is_hvm_domain(d) 0
> >    (XEN) (Joan)domain.c:390: hvm_funcs.hap_supported 1
> >    (XEN) (Joan)domain.c:391: (domcr_flags & DOMCRF_hap) 0
> >    (XEN) (Joan)p2m.c:1464: is_hvm_domain(d)  0
> >    (XEN) (Joan)p2m.c:1465: d->arch.hvm_domain.hap_enabled 0
> >    (XEN) (Joan)p2m.c:1466: X86_VENDOR_INTEL 1
> >    (XEN) (Joan)p2m.c:1473: d->arch.p2m->set_entry FFFF828C8019FD50
> >    (XEN) (Joan)p2m.c:1474: p2m_set_entry FFFF828C8019FD50
> >    (XEN) (Joan)domain.c:388: Domain ID 1
> >    (XEN) (Joan)domain.c:389: is_hvm_domain(d) 1
> >    (XEN) (Joan)domain.c:390: hvm_funcs.hap_supported 1
> >    (XEN) (Joan)domain.c:391: (domcr_flags & DOMCRF_hap) 0
> >    (XEN) (Joan)p2m.c:1464: is_hvm_domain(d)  1
> >    (XEN) (Joan)p2m.c:1465: d->arch.hvm_domain.hap_enabled 0
> >    (XEN) (Joan)p2m.c:1466: X86_VENDOR_INTEL 1
> >    (XEN) (Joan)p2m.c:1473: d->arch.p2m->set_entry FFFF828C8019FD50
> >    (XEN) (Joan)p2m.c:1474: p2m_set_entry FFFF828C8019FD50
> >
> >
> >
> >    Modified Code:
> >
> >    /* Init the datastructures for later use by the p2m code */
> >    1442: int p2m_init(struct domain *d)
> >    {
> >        struct p2m_domain *p2m;
> >
> >
> >
> >        p2m = xmalloc(struct p2m_domain);
> >        if ( p2m == NULL )
> >            return -ENOMEM;
> >
> >
> >
> >        d->arch.p2m = p2m;
> >
> >
> >
> >        memset(p2m, 0, sizeof(*p2m));
> >        p2m_lock_init(p2m);
> >        INIT_PAGE_LIST_HEAD(&p2m->pages);
> >        INIT_PAGE_LIST_HEAD(&p2m->pod.super);
> >        INIT_PAGE_LIST_HEAD(&p2m->pod.single);
> >
> >
> >
> >        p2m->set_entry = p2m_set_entry;
> >        p2m->get_entry = p2m_gfn_to_mfn;
> >        p2m->get_entry_current = p2m_gfn_to_mfn_current;
> >        p2m->change_entry_type_global = p2m_change_type_global;
> >
> >     joan_dprintk("is_hvm_domain(d)  %d\n", is_hvm_domain(d));
> >     joan_dprintk("d->arch.hvm_domain.hap_enabled %d\n",
> >    d->arch.hvm_domain.hap_enabled);
> >     joan_dprintk("X86_VENDOR_INTEL %d\n", (boot_cpu_data.x86_vendor ==
> >    X86_VENDOR_INTEL));
> >        if ( is_hvm_domain(d) && d->arch.hvm_domain.hap_enabled &&
> >             (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) )
> >     {
> >      joan_dprintk("Add Ept Support\n");
> >            ept_p2m_init(d);
> >     }
> >     joan_dprintk("d->arch.p2m->set_entry %lX\n",
> >    (uint64_t)(d->arch.p2m->set_entry) );
> >     joan_dprintk("p2m_set_entry %lX\n", (uint64_t)p2m_set_entry);
> >
> >
> >
> >        return 0;
> >    }
> >
> >
> >
> >
> >
> >    Thanks,
> >
> >    Miao
> >
> >
> >
> >
> >
> > References
> >
> >    Visible links
> >    1. http://www.xen.org/files/Support/XenConfigurationDetails.pdf
> > CTRL + Click to follow link
> > http://www.xen.org/files/Support/XenConfigurationDetails.pdf
> >    2. xin.li@xxxxxxxxx
> > mailto:xin.li@xxxxxxxxx
> >    3. xiantao.zhang@xxxxxxxxx
> > mailto:xiantao.zhang@xxxxxxxxx
> >    4. superymkxen@xxxxxxxxxxx
> > mailto:superymkxen@xxxxxxxxxxx
> >    5. xen-devel@xxxxxxxxxxxxxxxxxxx
> > mailto:xen-devel@xxxxxxxxxxxxxxxxxxx
> >    6. ken.mingyuan@xxxxxxxxxxx
> > mailto:ken.mingyuan@xxxxxxxxxxx
> >    7. mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
> >    8. mailto:xen-devel@xxxxxxxxxxxxxxxxxxx
> >    9. mailto:ken.mingyuan@xxxxxxxxxxx
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel