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From: "Adalbert Lazăr" <alazar@bitdefender.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: kvm@vger.kernel.org, linux-mm@kvack.org,
	virtualization@lists.linux-foundation.org,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@oracle.com>,
	"Tamas K Lengyel" <tamas@tklengyel.com>,
	"Mathieu Tarral" <mathieu.tarral@protonmail.com>,
	"Samuel Laurén" <samuel.lauren@iki.fi>,
	"Patrick Colp" <patrick.colp@oracle.com>,
	"Jan Kiszka" <jan.kiszka@siemens.com>,
	"Stefan Hajnoczi" <stefanha@redhat.com>,
	"Weijiang Yang" <weijiang.yang@intel.com>,
	Zhang@vger.kernel.org, "Yu C" <yu.c.zhang@intel.com>,
	"Mihai Donțu" <mdontu@bitdefender.com>,
	"Mircea Cîrjaliu" <mcirjaliu@bitdefender.com>
Subject: Re: [RFC PATCH v6 01/92] kvm: introduce KVMI (VM introspection subsystem)
Date: Tue, 13 Aug 2019 14:57:55 +0300
Message-ID: <1565697475.2eE1bB.4545.@15f23d3a749365d981e968181cce585d2dcb3ffa> (raw)
In-Reply-To: <20190812202030.GB1437@linux.intel.com>

On Mon, 12 Aug 2019 13:20:30 -0700, Sean Christopherson <sean.j.christopherson@intel.com> wrote:
> On Fri, Aug 09, 2019 at 06:59:16PM +0300, Adalbert Lazăr wrote:
> > diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> > index 72fa955f4a15..f70a6a1b6814 100644
> > --- a/arch/x86/kvm/Kconfig
> > +++ b/arch/x86/kvm/Kconfig
> > @@ -96,6 +96,13 @@ config KVM_MMU_AUDIT
> >  	 This option adds a R/W kVM module parameter 'mmu_audit', which allows
> >  	 auditing of KVM MMU events at runtime.
> >  
> > +config KVM_INTROSPECTION
> > +	bool "VM Introspection"
> > +	depends on KVM && (KVM_INTEL || KVM_AMD)
> > +	help
> > +	 This option enables functions to control the execution of VM-s, query
> > +	 the state of the vCPU-s (GPR-s, MSR-s etc.).
> 
> This does a lot more than enable functions, it allows userspace to do all
> of these things *while the VM is running*.  Everything above can already
> be done by userspace.

First of all, thanks for helping us with this patch series.

Do you mean something like this?

	This option enables an introspection app to control any running
	VM if userspace/QEMU allows it.

> 
> The "-s" syntax is difficult to read and unnecessary, e.g. at first I
> thought VM-s was referring to a new subsystem or feature introduced by
> introspection.  VMs, vCPUs, GPRs, MSRs, etc...
> 
> > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> > index c38cc5eb7e73..582b0187f5a4 100644
> > --- a/include/linux/kvm_host.h
> > +++ b/include/linux/kvm_host.h
> > @@ -455,6 +455,10 @@ struct kvm {
> >  	struct srcu_struct srcu;
> >  	struct srcu_struct irq_srcu;
> >  	pid_t userspace_pid;
> > +
> > +	struct completion kvmi_completed;
> > +	refcount_t kvmi_ref;
> 
> The refcounting approach seems a bit backwards, and AFAICT is driven by
> implementing unhook via a message, which also seems backwards.  I assume
> hook and unhook are relatively rare events and not performance critical,
> so make those the restricted/slow flows, e.g. force userspace to quiesce
> the VM by making unhook() mutually exclusive with every vcpu ioctl() and
> maybe anything that takes kvm->lock. 
> 
> Then kvmi_ioctl_unhook() can use thread_stop() and kvmi_recv() just needs
> to check kthread_should_stop().
> 
> That way kvmi doesn't need to be refcounted since it's guaranteed to be
> alive if the pointer is non-null.  Eliminating the refcounting will clean
> up a lot of the code by eliminating calls to kvmi_{get,put}(), e.g.
> wrappers like kvmi_breakpoint_event() just check vcpu->kvmi, or maybe
> even get dropped altogether.

The unhook event has been added to cover the following case: while the
introspection tool runs in another VM, both VMs, the virtual appliance
and the introspected VM, could be paused by the user. We needed a way
to signal this to the introspection tool and give it time to unhook
(the introspected VM has to run and execute the introspection commands
during this phase). The receiving threads quits when the socket is closed
(by QEMU or by the introspection tool).

It's a bit unclear how, but we'll try to get ride of the refcount object,
which will remove a lot of code, indeed.

> 
> > +	void *kvmi;
> 
> Why is this a void*?  Just forward declare struct kvmi in kvmi.h.
> 
> IMO this should be 'struct kvm_introspection *introspection', similar to
> 'struct kvm_vcpu_arch arch' and 'struct kvm_vmx'.  Ditto for the vCPU
> flavor.  Local variables could be kvmi+vcpui, kvm_i+vcpu_i, or maybe
> a more long form if someone can come up with a good abbreviation?
> 
> Using 'ikvm' as the local variable name when everything else refers to
> introspection as 'kvmi' is especially funky.

We'll do.

> 
> >  };
> >  
> >  #define kvm_err(fmt, ...) \
> > diff --git a/include/linux/kvmi.h b/include/linux/kvmi.h
> > new file mode 100644
> > index 000000000000..e36de3f9f3de
> > --- /dev/null
> > +++ b/include/linux/kvmi.h
> > @@ -0,0 +1,23 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef __KVMI_H__
> > +#define __KVMI_H__
> > +
> > +#define kvmi_is_present() IS_ENABLED(CONFIG_KVM_INTROSPECTION)
> 
> Peeking forward a few patches, introspection should have a module param.

Like kvm.introspection=true/False ?

> The code is also inconsistent in its usage of kvmi_is_present() versus
> #ifdef CONFIG_KVM_INTROSPECTION.
> 
> And maybe kvm_is_instrospection_enabled() so that the gating function has
> a more descriptive name for first-time readers?

Right.

> > diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h
> > new file mode 100644
> > index 000000000000..dbf63ad0862f
> > --- /dev/null
> > +++ b/include/uapi/linux/kvmi.h
> > @@ -0,0 +1,68 @@
> > +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> > +#ifndef _UAPI__LINUX_KVMI_H
> > +#define _UAPI__LINUX_KVMI_H
> > +
> > +/*
> > + * KVMI structures and definitions
> > + */
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/types.h>
> > +
> > +#define KVMI_VERSION 0x00000001
> > +
> > +enum {
> > +	KVMI_EVENT_REPLY           = 0,
> > +	KVMI_EVENT                 = 1,
> > +
> > +	KVMI_FIRST_COMMAND         = 2,
> > +
> > +	KVMI_GET_VERSION           = 2,
> > +	KVMI_CHECK_COMMAND         = 3,
> > +	KVMI_CHECK_EVENT           = 4,
> > +	KVMI_GET_GUEST_INFO        = 5,
> > +	KVMI_GET_VCPU_INFO         = 6,
> > +	KVMI_PAUSE_VCPU            = 7,
> > +	KVMI_CONTROL_VM_EVENTS     = 8,
> > +	KVMI_CONTROL_EVENTS        = 9,
> > +	KVMI_CONTROL_CR            = 10,
> > +	KVMI_CONTROL_MSR           = 11,
> > +	KVMI_CONTROL_VE            = 12,
> > +	KVMI_GET_REGISTERS         = 13,
> > +	KVMI_SET_REGISTERS         = 14,
> > +	KVMI_GET_CPUID             = 15,
> > +	KVMI_GET_XSAVE             = 16,
> > +	KVMI_READ_PHYSICAL         = 17,
> > +	KVMI_WRITE_PHYSICAL        = 18,
> > +	KVMI_INJECT_EXCEPTION      = 19,
> > +	KVMI_GET_PAGE_ACCESS       = 20,
> > +	KVMI_SET_PAGE_ACCESS       = 21,
> > +	KVMI_GET_MAP_TOKEN         = 22,
> > +	KVMI_GET_MTRR_TYPE         = 23,
> > +	KVMI_CONTROL_SPP           = 24,
> > +	KVMI_GET_PAGE_WRITE_BITMAP = 25,
> > +	KVMI_SET_PAGE_WRITE_BITMAP = 26,
> > +	KVMI_CONTROL_CMD_RESPONSE  = 27,
> 
> Each command should be introduced along with the patch that adds the
> associated functionality.
> 
> It'd be helpful to incorporate the scope of the command in the name,
> e.g. VM vs. vCPU.
> 
> Why are VM and vCPU commands smushed together?
>
> > +
> > +	KVMI_NEXT_AVAILABLE_COMMAND,
> 
> Why not KVMI_NR_COMMANDS or KVM_NUM_COMMANDS?  At least be consistent
> between COMMANDS and EVENTS below.

This looks odd, indeed.  The intention was that the size of an internal
bitmap be KVMI_NEXT_AVAILABLE_COMMAND-KVMI_FIRST_COMMAND, but it was
too complicated. It is probably a leftover.

> > diff --git a/virt/kvm/kvmi.c b/virt/kvm/kvmi.c
> > new file mode 100644
> > index 000000000000..20638743bd03
> > --- /dev/null
> > +++ b/virt/kvm/kvmi.c
> > @@ -0,0 +1,64 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * KVM introspection
> > + *
> > + * Copyright (C) 2017-2019 Bitdefender S.R.L.
> > + *
> > + */
> > +#include <uapi/linux/kvmi.h>
> > +#include "kvmi_int.h"
> > +
> > +int kvmi_init(void)
> > +{
> > +	return 0;
> > +}
> > +
> > +void kvmi_uninit(void)
> > +{
> > +}
> > +
> > +struct kvmi * __must_check kvmi_get(struct kvm *kvm)
> > +{
> > +	if (refcount_inc_not_zero(&kvm->kvmi_ref))
> > +		return kvm->kvmi;
> > +
> > +	return NULL;
> > +}
> > +
> > +static void kvmi_destroy(struct kvm *kvm)
> > +{
> > +}
> > +
> > +static void kvmi_release(struct kvm *kvm)
> > +{
> > +	kvmi_destroy(kvm);
> > +
> > +	complete(&kvm->kvmi_completed);
> > +}
> > +
> > +/* This function may be called from atomic context and must not sleep */
> > +void kvmi_put(struct kvm *kvm)
> > +{
> > +	if (refcount_dec_and_test(&kvm->kvmi_ref))
> > +		kvmi_release(kvm);
> > +}
> > +
> > +void kvmi_create_vm(struct kvm *kvm)
> > +{
> > +	init_completion(&kvm->kvmi_completed);
> > +	complete(&kvm->kvmi_completed);
> 
> Pretty sure you don't want to be calling complete() here.

The intention was to stop the hooking ioctl until the VM is
created. A better name for 'kvmi_completed' would have been
'ready_to_be_introspected', as kvmi_hook() will wait for it.

We'll see how we can get ride of the completion object.

Thanks.


  parent reply index

Thread overview: 168+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09 15:59 [RFC PATCH v6 00/92] VM introspection Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 01/92] kvm: introduce KVMI (VM introspection subsystem) Adalbert Lazăr
2019-08-12 20:20   ` Sean Christopherson
2019-08-13  9:11     ` Paolo Bonzini
2019-08-13 11:57     ` Adalbert Lazăr [this message]
     [not found]     ` <5d52a5ae.1c69fb81.5c260.1573SMTPIN_ADDED_BROKEN@mx.google.com>
2019-08-13 12:09       ` Paolo Bonzini
2019-08-13 15:01         ` Sean Christopherson
2019-08-13 21:03           ` Paolo Bonzini
2019-08-14  9:48           ` Adalbert Lazăr
     [not found]           ` <5d53d8d1.1c69fb81.7d32.0bedSMTPIN_ADDED_BROKEN@mx.google.com>
2019-08-14 10:37             ` Paolo Bonzini
2019-08-09 15:59 ` [RFC PATCH v6 02/92] kvm: introspection: add basic ioctls (hook/unhook) Adalbert Lazăr
2019-08-13  8:44   ` Paolo Bonzini
2019-08-13 14:24     ` Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 03/92] kvm: introspection: add permission access ioctls Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 04/92] kvm: introspection: add the read/dispatch message function Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 05/92] kvm: introspection: add KVMI_GET_VERSION Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 06/92] kvm: introspection: add KVMI_CONTROL_CMD_RESPONSE Adalbert Lazăr
2019-08-13  9:15   ` Paolo Bonzini
2019-08-13 17:08     ` Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 07/92] kvm: introspection: honor the reply option when handling the KVMI_GET_VERSION command Adalbert Lazăr
2019-08-13  9:16   ` Paolo Bonzini
2019-08-09 15:59 ` [RFC PATCH v6 08/92] kvm: introspection: add KVMI_CHECK_COMMAND and KVMI_CHECK_EVENT Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 09/92] kvm: introspection: add KVMI_GET_GUEST_INFO Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 10/92] kvm: introspection: add KVMI_CONTROL_VM_EVENTS Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 11/92] kvm: introspection: add vCPU related data Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 12/92] kvm: introspection: add a jobs list to every introspected vCPU Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 13/92] kvm: introspection: make the vCPU wait even when its jobs list is empty Adalbert Lazăr
2019-08-13  8:43   ` Paolo Bonzini
2019-08-13 14:19     ` Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 14/92] kvm: introspection: handle introspection commands before returning to guest Adalbert Lazăr
2019-08-13  8:26   ` Paolo Bonzini
2019-08-13 13:54     ` Adalbert Lazăr
     [not found]     ` <5d52c10e.1c69fb81.26904.fd34SMTPIN_ADDED_BROKEN@mx.google.com>
2019-08-13 14:45       ` Paolo Bonzini
2019-08-14  9:39         ` Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 15/92] kvm: introspection: handle vCPU related introspection commands Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 16/92] kvm: introspection: handle events and event replies Adalbert Lazăr
2019-08-13  8:55   ` Paolo Bonzini
2019-08-13 15:25     ` Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 17/92] kvm: introspection: introduce event actions Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 18/92] kvm: introspection: add KVMI_EVENT_UNHOOK Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 19/92] kvm: introspection: add KVMI_EVENT_CREATE_VCPU Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 20/92] kvm: introspection: add KVMI_GET_VCPU_INFO Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 21/92] kvm: page track: add track_create_slot() callback Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 22/92] kvm: x86: provide all page tracking hooks with the guest virtual address Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 23/92] kvm: page track: add support for preread, prewrite and preexec Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 24/92] kvm: x86: wire in the preread/prewrite/preexec page trackers Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 25/92] kvm: x86: intercept the write access on sidt and other emulated instructions Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 26/92] kvm: x86: add kvm_mmu_nested_pagefault() Adalbert Lazăr
2019-08-13  8:12   ` Paolo Bonzini
2019-08-09 15:59 ` [RFC PATCH v6 27/92] kvm: introspection: use page track Adalbert Lazăr
2019-08-13  9:06   ` Paolo Bonzini
2019-08-09 15:59 ` [RFC PATCH v6 28/92] kvm: x86: consult the page tracking from kvm_mmu_get_page() and __direct_map() Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 29/92] kvm: introspection: add KVMI_CONTROL_EVENTS Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 30/92] kvm: x86: add kvm_spt_fault() Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 31/92] kvm: introspection: add KVMI_EVENT_PF Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 32/92] kvm: introspection: add KVMI_GET_PAGE_ACCESS Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 33/92] kvm: introspection: add KVMI_SET_PAGE_ACCESS Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 34/92] Documentation: Introduce EPT based Subpage Protection Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 35/92] KVM: VMX: Add control flags for SPP enabling Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 36/92] KVM: VMX: Implement functions for SPPT paging setup Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 37/92] KVM: VMX: Introduce SPP access bitmap and operation functions Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 38/92] KVM: VMX: Add init/set/get functions for SPP Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 39/92] KVM: VMX: Introduce SPP user-space IOCTLs Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 40/92] KVM: VMX: Handle SPP induced vmexit and page fault Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 41/92] KVM: MMU: Enable Lazy mode SPPT setup Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 42/92] KVM: MMU: Handle host memory remapping and reclaim Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 43/92] kvm: introspection: add KVMI_CONTROL_SPP Adalbert Lazăr
2019-08-09 15:59 ` [RFC PATCH v6 44/92] kvm: introspection: extend the internal database of tracked pages with write_bitmap info Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 45/92] kvm: introspection: add KVMI_GET_PAGE_WRITE_BITMAP Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 46/92] kvm: introspection: add KVMI_SET_PAGE_WRITE_BITMAP Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 47/92] kvm: introspection: add KVMI_READ_PHYSICAL and KVMI_WRITE_PHYSICAL Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 48/92] kvm: add kvm_vcpu_kick_and_wait() Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 49/92] kvm: introspection: add KVMI_PAUSE_VCPU and KVMI_EVENT_PAUSE_VCPU Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 50/92] kvm: introspection: add KVMI_GET_REGISTERS Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 51/92] kvm: introspection: add KVMI_SET_REGISTERS Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 52/92] kvm: introspection: add KVMI_GET_CPUID Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 53/92] kvm: introspection: add KVMI_INJECT_EXCEPTION + KVMI_EVENT_TRAP Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 54/92] kvm: introspection: add KVMI_CONTROL_CR and KVMI_EVENT_CR Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 55/92] kvm: introspection: add KVMI_CONTROL_MSR and KVMI_EVENT_MSR Adalbert Lazăr
2019-08-12 21:05   ` Sean Christopherson
2019-08-15  6:36     ` Nicusor CITU
2019-08-19 18:36       ` Sean Christopherson
2019-08-20  8:44         ` Nicusor CITU
2019-08-20 11:43           ` Mihai Donțu
2019-08-21 15:18             ` Sean Christopherson
2019-08-19 18:52   ` Sean Christopherson
2019-08-09 16:00 ` [RFC PATCH v6 56/92] kvm: x86: block any attempt to disable MSR interception if tracked by introspection Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 57/92] kvm: introspection: add KVMI_GET_XSAVE Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 58/92] kvm: introspection: add KVMI_GET_MTRR_TYPE Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 59/92] kvm: introspection: add KVMI_EVENT_XSETBV Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 60/92] kvm: x86: add kvm_arch_vcpu_set_guest_debug() Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 61/92] kvm: introspection: add KVMI_EVENT_BREAKPOINT Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 62/92] kvm: introspection: add KVMI_EVENT_HYPERCALL Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 63/92] kvm: introspection: add KVMI_EVENT_DESCRIPTOR Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 64/92] kvm: introspection: add single-stepping Adalbert Lazăr
2019-08-12 20:50   ` Sean Christopherson
2019-08-13 12:51     ` Adalbert Lazăr
2019-08-14 12:36     ` Nicusor CITU
2019-08-14 12:53       ` Paolo Bonzini
2019-08-09 16:00 ` [RFC PATCH v6 65/92] kvm: introspection: add KVMI_EVENT_SINGLESTEP Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 66/92] kvm: introspection: add custom input when single-stepping a vCPU Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 67/92] kvm: introspection: use single stepping on unimplemented instructions Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 68/92] kvm: x86: emulate a guest page table walk on SPT violations due to A/D bit updates Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 69/92] kvm: x86: keep the page protected if tracked by the introspection tool Adalbert Lazăr
2019-09-10 14:26   ` Konrad Rzeszutek Wilk
2019-09-10 16:28     ` Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 70/92] kvm: x86: filter out access rights only when " Adalbert Lazăr
2019-08-13  9:08   ` Paolo Bonzini
2019-08-13 16:06     ` Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 71/92] mm: add support for remote mapping Adalbert Lazăr
2019-08-09 16:24   ` DANGER WILL ROBINSON, DANGER Matthew Wilcox
2019-08-13  9:29     ` Paolo Bonzini
2019-08-13 11:24       ` Matthew Wilcox
2019-08-13 12:02         ` Paolo Bonzini
2019-08-13 11:01     ` Adalbert Lazăr
2019-08-15 19:19       ` Jerome Glisse
2019-08-15 20:16         ` Jerome Glisse
2019-08-16 17:45           ` Jason Gunthorpe
2019-08-23 12:39           ` Mircea CIRJALIU - MELIU
2019-09-05 18:09             ` Jerome Glisse
2019-09-09 17:00               ` Paolo Bonzini
2019-09-10  7:49                 ` Mircea CIRJALIU - MELIU
2019-10-02 19:27                   ` Jerome Glisse
2019-10-02 13:46                     ` Paolo Bonzini
2019-10-02 14:15                       ` Jerome Glisse
2019-10-02 16:18                         ` Paolo Bonzini
2019-10-02 17:04                           ` Jerome Glisse
2019-10-02 20:10                             ` Paolo Bonzini
2019-10-03 15:42                               ` Jerome Glisse
2019-10-03 15:50                                 ` Paolo Bonzini
2019-10-03 16:42                                   ` Mircea CIRJALIU - MELIU
2019-10-03 18:31                                     ` Jerome Glisse
2019-10-03 19:38                                       ` Paolo Bonzini
2019-10-04  9:41                                         ` Mircea CIRJALIU - MELIU
2019-10-04 11:46                                           ` Paolo Bonzini
2019-10-03 16:36                               ` Mircea CIRJALIU - MELIU
2019-08-09 16:00 ` [RFC PATCH v6 72/92] kvm: introspection: add memory map/unmap support on the guest side Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 73/92] kvm: introspection: use remote mapping Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 74/92] kvm: x86: do not unconditionally patch the hypercall instruction during emulation Adalbert Lazăr
2019-08-13  9:20   ` Paolo Bonzini
2019-08-14 12:07     ` Adalbert Lazăr
     [not found]     ` <5d53f965.1c69fb81.cd952.035bSMTPIN_ADDED_BROKEN@mx.google.com>
2019-08-14 12:33       ` Paolo Bonzini
2019-08-09 16:00 ` [RFC PATCH v6 75/92] kvm: x86: disable gpa_available optimization in emulator_read_write_onepage() Adalbert Lazăr
2019-08-13  8:47   ` Paolo Bonzini
2019-08-13 14:33     ` Adalbert Lazăr
     [not found]     ` <5d52ca22.1c69fb81.4ceb8.e90bSMTPIN_ADDED_BROKEN@mx.google.com>
2019-08-13 14:35       ` Paolo Bonzini
2019-08-09 16:00 ` [RFC PATCH v6 76/92] kvm: x86: disable EPT A/D bits if introspection is present Adalbert Lazăr
2019-08-13  9:18   ` Paolo Bonzini
2019-08-09 16:00 ` [RFC PATCH v6 77/92] kvm: introspection: add trace functions Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 78/92] kvm: x86: add tracepoints for interrupt and exception injections Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 79/92] kvm: x86: emulate movsd xmm, m64 Adalbert Lazăr
2019-08-13  9:17   ` Paolo Bonzini
2019-08-09 16:00 ` [RFC PATCH v6 80/92] kvm: x86: emulate movss xmm, m32 Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 81/92] kvm: x86: emulate movq xmm, m64 Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 82/92] kvm: x86: emulate movq r, xmm Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 83/92] kvm: x86: emulate movd xmm, m32 Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 84/92] kvm: x86: enable the half part of movss, movsd, movups Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 85/92] kvm: x86: emulate lfence Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 86/92] kvm: x86: emulate xorpd xmm2/m128, xmm1 Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 87/92] kvm: x86: emulate xorps xmm/m128, xmm Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 88/92] kvm: x86: emulate fst/fstp m64fp Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 89/92] kvm: x86: make lock cmpxchg r, r/m atomic Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 90/92] kvm: x86: emulate lock cmpxchg8b atomically Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 91/92] kvm: x86: emulate lock cmpxchg16b m128 Adalbert Lazăr
2019-08-09 16:00 ` [RFC PATCH v6 92/92] kvm: x86: fallback to the single-step on multipage CMPXCHG emulation Adalbert Lazăr
2019-08-12 18:23 ` [RFC PATCH v6 00/92] VM introspection Sean Christopherson
2019-08-12 21:40 ` Sean Christopherson
2019-08-13  9:34 ` Paolo Bonzini

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