Displaying 7 results from an estimated 7 matches for "emulator_write_emul".
2020 Feb 07
0
[RFC PATCH v7 09/78] KVM: x86: avoid injecting #PF when emulate the VMCALL instruction
From: Mihai Don?u <mdontu at bitdefender.com>
It can happened to end up emulating the VMCALL instruction as a result
of the handling of an EPT write fault. In this situation,
the emulator will try to unconditionally patch the correct hypercall
opcode bytes using emulator_write_emulated(). However, this last call
uses the fault GPA (if available) or walks the guest page tables at RIP,
otherwise. The trouble begins when using KVMI, when we forbid the use
of the fault GPA and fallback to the guest pt walk: in Windows (8.1
and newer) the page that we try to write into is marked r...
2020 Jul 21
0
[PATCH v9 08/84] KVM: x86: avoid injecting #PF when emulate the VMCALL instruction
From: Mihai Don?u <mdontu at bitdefender.com>
It can happened to end up emulating the VMCALL instruction as a result
of the handling of an EPT write fault. In this situation,
the emulator will try to unconditionally patch the correct hypercall
opcode bytes using emulator_write_emulated(). However, this last call
uses the fault GPA (if available) or walks the guest page tables at RIP,
otherwise. The trouble begins when using VM introspection,
when we forbid the use of the fault GPA and fallback to the guest pt walk:
in Windows (8.1 and newer) the page that we try to write into...
2019 Aug 09
0
[RFC PATCH v6 74/92] kvm: x86: do not unconditionally patch the hypercall instruction during emulation
From: Mihai Don?u <mdontu at bitdefender.com>
It can happened for us to end up emulating the VMCALL instruction as a
result of the handling of an EPT write fault. In this situation, the
emulator will try to unconditionally patch the correct hypercall opcode
bytes using emulator_write_emulated(). However, this last call uses the
fault GPA (if available) or walks the guest page tables at RIP,
otherwise. The trouble begins when using KVMI, when we forbid the use of
the fault GPA and fallback to the guest pt walk: in Windows (8.1 and
newer) the page that we try to write into is marked r...
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
The KVM introspection subsystem provides a facility for applications running
on the host or in a separate VM, to control the execution of other VM-s
(pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.),
alter the page access bits in the shadow page tables (only for the hardware
backed ones, eg. Intel's EPT) and receive notifications when events of
interest have taken place
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
The KVM introspection subsystem provides a facility for applications running
on the host or in a separate VM, to control the execution of other VM-s
(pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.),
alter the page access bits in the shadow page tables (only for the hardware
backed ones, eg. Intel's EPT) and receive notifications when events of
interest have taken place
2020 Feb 07
78
[RFC PATCH v7 00/78] VM introspection
The KVM introspection subsystem provides a facility for applications
running on the host or in a separate VM, to control the execution of
other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs,
MSRs etc.), alter the page access bits in the shadow page tables (only
for the hardware backed ones, eg. Intel's EPT) and receive notifications
when events of interest have taken place
2020 Jul 21
87
[PATCH v9 00/84] VM introspection
The KVM introspection subsystem provides a facility for applications
running on the host or in a separate VM, to control the execution of
other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs,
MSRs etc.), alter the page access bits in the shadow page tables (only
for the hardware backed ones, eg. Intel's EPT) and receive notifications
when events of interest have taken place