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
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