From: Tamas K Lengyel <tamas.k.lengyel@gmail.com>
To: "Michał Leszczyński" <michal.leszczynski@cert.pl>
Cc: "Stefano Stabellini" <sstabellini@kernel.org>,
"Julien Grall" <julien@xen.org>, "Wei Liu" <wl@xen.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Ian Jackson" <ian.jackson@eu.citrix.com>,
"George Dunlap" <george.dunlap@citrix.com>,
"Jan Beulich" <jbeulich@suse.com>,
Xen-devel <xen-devel@lists.xenproject.org>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [PATCH v1 4/7] x86/vmx: add do_vmtrace_op
Date: Wed, 17 Jun 2020 21:20:39 -0600 [thread overview]
Message-ID: <CABfawhmxUtuyBUYjVf9iOMvJop-_7SfciRNQThZt0sAqPsVqrg@mail.gmail.com> (raw)
In-Reply-To: <998292451.9258672.1592421185726.JavaMail.zimbra@cert.pl>
> >> +
> >> + a.mfn = v->arch.hvm.vmx.ipt_state->output_base >> PAGE_SHIFT;
> >
> > This will not work for translated domains, ie: a PVH or HVM domain
> > won't be able to use this interface since it has no way to request the
> > mapping of a specific mfn into it's physmap. I think we need to take
> > this into account when deciding how the interface should be, so that
> > we don't corner ourselves with a PV only interface.
>
> Please be aware that this is only going to be used by Dom0. Is is well-supported case that somebody is using PVH/HVM Dom0?
>
> I think that all Virtual Machine Introspection stuff currently requires to have Dom0 PV. Our main goal is to have this working well in combo with VMI.
FYI the VMI interface doesn't require a PV domain. It works fine from
PVH dom0 or even from a secondary privileged HVM DomU as well,
provided you have the right XSM policy to allow that.
Tamas
next prev parent reply other threads:[~2020-06-18 3:21 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-16 15:16 [PATCH v1 0/7] Implement support for external IPT monitoring Michał Leszczyński
2020-06-16 15:19 ` [PATCH v1 1/7] x86/vmx: add Intel PT MSR definitions Michał Leszczyński
2020-06-18 13:31 ` Jan Beulich
2020-06-16 15:20 ` [PATCH v1 2/7] x86/vmx: add IPT cpu feature Michał Leszczyński
2020-06-16 16:30 ` Roger Pau Monné
2020-06-17 11:34 ` Jan Beulich
2020-06-16 15:21 ` [PATCH v1 3/7] x86/vmx: add ipt_state as part of vCPU state Michał Leszczyński
2020-06-16 16:33 ` Roger Pau Monné
2020-06-16 15:22 ` [PATCH v1 4/7] x86/vmx: add do_vmtrace_op Michał Leszczyński
2020-06-16 17:23 ` Roger Pau Monné
2020-06-17 19:13 ` Michał Leszczyński
2020-06-18 3:20 ` Tamas K Lengyel [this message]
2020-06-18 11:01 ` Michał Leszczyński
2020-06-18 11:55 ` Roger Pau Monné
2020-06-18 12:51 ` Jan Beulich
2020-06-18 13:09 ` Michał Leszczyński
2020-06-18 13:24 ` Jan Beulich
2020-06-18 13:40 ` Roger Pau Monné
2020-06-18 8:46 ` Roger Pau Monné
2020-06-18 15:25 ` Michał Leszczyński
2020-06-18 15:39 ` Jan Beulich
2020-06-18 15:47 ` Tamas K Lengyel
2020-06-18 15:49 ` Tamas K Lengyel
2020-06-16 15:22 ` [PATCH v1 5/7] tools/libxc: add xc_ptbuf_* functions Michał Leszczyński
2020-06-16 15:23 ` [PATCH v1 6/7] tools/proctrace: add proctrace tool Michał Leszczyński
2020-06-16 15:24 ` [PATCH v1 7/7] x86/vmx: switch IPT MSRs on vmentry/vmexit Michał Leszczyński
2020-06-16 17:38 ` Roger Pau Monné
2020-06-16 17:47 ` Michał Leszczyński
2020-06-17 9:09 ` Roger Pau Monné
2020-06-17 11:54 ` Michał Leszczyński
2020-06-17 12:51 ` Roger Pau Monné
2020-06-17 15:14 ` Andrew Cooper
2020-06-17 18:56 ` Michał Leszczyński
2020-06-18 8:52 ` Roger Pau Monné
2020-06-18 11:07 ` Michał Leszczyński
2020-06-18 11:49 ` Roger Pau Monné
2020-06-17 23:30 ` Kang, Luwei
2020-06-18 10:02 ` Andrew Cooper
2020-06-18 17:38 ` Andrew Cooper
2020-06-16 18:17 ` [PATCH v1 0/7] Implement support for external IPT monitoring Andrew Cooper
2020-06-16 18:47 ` Michał Leszczyński
2020-06-16 20:16 ` Andrew Cooper
2020-06-17 3:02 ` Tamas K Lengyel
2020-06-17 16:19 ` Andrew Cooper
2020-06-17 16:27 ` Tamas K Lengyel
2020-06-17 17:23 ` Andrew Cooper
2020-06-17 19:31 ` Tamas K Lengyel
2020-06-17 19:30 ` Michał Leszczyński
2020-06-17 20:20 ` Michał Leszczyński
2020-06-18 8:25 ` Roger Pau Monné
2020-06-18 14:59 ` Michał Leszczyński
2020-06-17 1:35 ` Tian, Kevin
2020-06-17 6:45 ` Kang, Luwei
2020-06-17 9:21 ` Roger Pau Monné
2020-06-17 12:37 ` Kang, Luwei
2020-06-17 12:53 ` Roger Pau Monné
2020-06-17 23:29 ` Kang, Luwei
2020-06-18 0:56 ` Michał Leszczyński
2020-06-18 7:00 ` Roger Pau Monné
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