search for: ept

Attached are the patches to support super page with EPT. We only support 2M size. And shadow may still work fine with 4K pages. The patches can be split into 3 parts. Apply order is as attached. tool.diff To allocate 2M physical contiguous memory in guest except the first 2M and the last 2M. The first 2M covers special memory, and Xen use the la...

Hi, I am really confused about NPT walks for guest page table , and eager to know the details about it. It is treated as data writes even if the access itself is a code read in AMD NPT.I just want to know : is it the same in EPT? Could anyone help me? I would like to know that very much Thank you in advance Bo Ma _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

From: Zhang Xiantao <xiantao.zhang@intel.com> With virtual EPT support, L1 hyerpvisor can use EPT hardware for L2 guest''s memory virtualization. In this way, L2 guest''s performance can be improved sharply. According to our testing, some benchmarks can show > 5x performance gain. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>...

Hello Xlord, The CPU does have VT support and I already have the nested KVM enabled. Checking the Linux Kernel release notes I saw that the nested kvm feature was implemented in 3.10 but he EPT support is in 3.12. So Centos 7's kernel which is 3.10 does have the EPT support? Is there a way to check that the EPT support is available in the kernel? Thank you, Laurentiu On Thu, Aug 4, 2016, 06:04 -=X.L.O.R.D=- <xlord.sl at gmail.com> wrote: > Dear Laurentiu, > > Please...

Hi Xlord, Yes, the CPU has support for EPT. I wrongly thought that the nested EPT was first introduced in 3.12. Following your instructions I see that I have it enabled on my system as well. However, checking the kernel commits from 3.12 on search string 'nested ept' I found about 10 code changes/fixes for nested EPT. https://g...

The patch attached is to set effective memory type for EPT according to the VT-d snoop control capability, and also includes some cleansup for EPT & VT-d both enabled. Signed-off-by: Zhai, Edwin Edwin.Zhai@intel.com<mailto:Edwin.Zhai@intel.com> Signed-off-by: Xin, Xiaohui xiaohui.xin@intel.com<mailto:xiaohui.xin@intel.com> ___________...

Hello I''am using xen 4.1.1. I''ve created 4 domU successfully, but EPT Table is not enable, and I can''t enable it. I''ve try different option in grub (iommu=eptable, ....). According to "xm dmesg", my PC is compatible with EPT (XEN) VMX: Supported advanced features: (XEN) - APIC MMIO access virtualisation (XEN) - APIC TPR shadow...

...IRTIO_RPMSG_REQUEST]) { + if (in) { + vq_err(vq, "%s(): invalid %d input in request queue\n", + __func__, in); + goto return_buf; + } + + *cnt = out; + } + + return head; + +return_buf: + vhost_add_used(vq, head, 0); + + return -EINVAL; +} + +static const struct vhost_rpmsg_ept *vhost_rpmsg_ept_find(struct vhost_rpmsg *vr, int addr) +{ + unsigned int i; + + for (i = 0; i < vr->n_epts; i++) + if (vr->ept[i].addr == addr) + return vr->ept + i; + + return NULL; +} + +/* + * if len < 0, then for reading a request, the complete virtual queue buffer + * size i...

...+ * or vhost_discard_vq_desc(). vhost_discard_vq_desc() is + * described as "being useful for error handling," but it makes + * the thus discarded buffers "unseen," so next time we look we + * retrieve them again? + */ + return -EINVAL; +} + +static const struct vhost_rpmsg_ept *vhost_rpmsg_ept_find( + struct vhost_rpmsg *vr, int addr) +{ + unsigned int i; + + for (i = 0; i < vr->n_epts; i++) + if (vr->ept[i].addr == addr) + return vr->ept + i; + + return NULL; +} + +/* + * if len < 0, then for reading a request, the complete virtual queue buffer + *...

...+ * or vhost_discard_vq_desc(). vhost_discard_vq_desc() is + * described as "being useful for error handling," but it makes + * the thus discarded buffers "unseen," so next time we look we + * retrieve them again? + */ + return -EINVAL; +} + +static const struct vhost_rpmsg_ept *vhost_rpmsg_ept_find(struct vhost_rpmsg *vr, int addr) +{ + unsigned int i; + + for (i = 0; i < vr->n_epts; i++) + if (vr->ept[i].addr == addr) + return vr->ept + i; + + return NULL; +} + +/* + * if len < 0, then for reading a request, the complete virtual queue buffer + * size i...

...case, since having a present old_entry will cause the an unnecessary check to be taken at the end of the function. Spotted-by: Zhang, Peng Fei <zpfalpc23@gmail.com> Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> diff -r 3caed2112c65 -r 56b32e6fd315 xen/arch/x86/mm/hap/p2m-ept.c --- a/xen/arch/x86/mm/hap/p2m-ept.c Tue Mar 15 10:14:27 2011 +0000 +++ b/xen/arch/x86/mm/hap/p2m-ept.c Tue Mar 15 15:41:17 2011 +0000 @@ -374,7 +374,9 @@ needs_sync = 0; /* If we''re replacing a non-leaf entry with a leaf entry (1GiB or 2MiB), - * the inter...

This patch series restores the use of superpages when restoring or migrating a VM, while retaining efficient batching of 4k pages when superpages are not appropriate or available. Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...d to be a client > configuration. I agree that this isn't very obvious. But I think it is common to call the host "a server" and guests "clients." E.g. in vhost.c in the top-of-thefile comment: * Generic code for virtio server in host kernel. I think the generic concept behind this notation is, that as guests boot, they send their requests to the host, e.g. VirtIO device drivers on guests send requests over VirtQueues to VirtIO servers on the host, which can run either in the user- or in the kernel-space. And I think you can follow that logic in case of device...

...currently there is only support for VirtIO clients and > > no support for VirtIO servers. This patch adds a vhost-based RPMsg > > server implementation, which makes it possible to use RPMsg over > > VirtIO between guest VMs and the host. > > I now get the client/server concept you are describing above but that happened > only after a lot of mental gymnastics. If you drop the whole client/server > concept and concentrate on what this patch does, things will go better. I would > personally go with what you have in the Kconfig: > > > + Vhost RPMsg AP...

Hi, Next update: v7: - remove documentation update to be send separately - address comments from Mathieu Poirier (thanks) v6: - rename include/linux/virtio_rpmsg.h -> include/linux/rpmsg/virtio.h v5: - don't hard-code message layout v4: - add endianness conversions to comply with the VirtIO standard v3: - address several checkpatch warnings - address comments from Mathieu Poirier v2:

Hi, Next update: v7: - remove documentation update to be send separately - address comments from Mathieu Poirier (thanks) v6: - rename include/linux/virtio_rpmsg.h -> include/linux/rpmsg/virtio.h v5: - don't hard-code message layout v4: - add endianness conversions to comply with the VirtIO standard v3: - address several checkpatch warnings - address comments from Mathieu Poirier v2:

This patch series is based on the VM introspection patches (https://lore.kernel.org/kvm/20200721210922.7646-1-alazar at bitdefender.com/), extending the introspection API with EPT Views and Virtualization Exceptions (#VE) support. The purpose of this series is to get an initial feedback and to see if we are on the right track, especially because the changes made to add the EPT views are not small (even if they add support only for different access rights for now, not for di...

...[mailto:centos-virt-bounces at centos.org] On Behalf Of Johnny Hughes Sent: Thursday, August 4, 2016 9:10 PM To: centos-virt at centos.org Subject: Re: [CentOS-virt] Centos 7 newer kernel needed On 08/04/2016 07:30 AM, Laurentiu Soica wrote: > Hi Xlord, > > Yes, the CPU has support for EPT. > > I wrongly thought that the nested EPT was first introduced in 3.12. > Following your instructions I see that I have it enabled on my system > as well. > > However, checking the kernel commits from 3.12 on search string > 'nested ept' I found about 10 code ch...

Dear Laurentiu, Could you please check if your CPU supported from /proc/cpuinfo and lscpu ? EPT supported Xlord From: -=X.L.O.R.D=- [mailto:xlord.sl at gmail.com] Sent: Thursday, August 4, 2016 5:12 PM To: 'Laurentiu Soica' <laurentiu at soica.ro>; 'Discussion about the virtualization on CentOS' <centos-virt at centos.org> Subject: RE: [CentOS-virt] Centos 7...

...m using libvirt 1.2.20. I noticed that when running some VMs (CentOS ) with 2G ram, 2CPUs each for some reason they go from 'state=running' to 'state=paused'; and they can't be restarted. They are un-usable. When this happens I get the following in dmesg output: [ 46.595265] EPT: Misconfiguration. [ 46.595271] EPT: GPA: 0xfee000b0 [ 46.595275] ept_misconfig_inspect_spte: spte 0x7e4968107 level 4 [ 46.595279] ept_misconfig_inspect_spte: spte 0x7e4961107 level 3 [ 46.595281] ept_misconfig_inspect_spte: spte 0x7e4960107 level 2 [ 46.595284] ept_misconfig_inspect_spt...