From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Razvan Cojocaru <rcojocaru@bitdefender.com>, xen-devel@lists.xen.org
Cc: Andrei Lutas <vlutas@bitdefender.com>, tim@xen.org
Subject: Re: [PATCH RFC 8/9] xen: Generic instruction re-execution mechanism for execute faults
Date: Wed, 2 Jul 2014 17:04:12 +0100 [thread overview]
Message-ID: <53B42D7C.1000004@citrix.com> (raw)
In-Reply-To: <1404308041-15461-8-git-send-email-rcojocaru@bitdefender.com>
On 02/07/14 14:34, Razvan Cojocaru wrote:
> The Xen emulator is incapable of handling some instructions, which
> leads to the injection of an Invalid Opcode exception (#UD) inside
> the guest once an unsupported instruction is encountered.
This is (as far as I am aware) simply because Xen's current emulation
only expects to emulate instructions which trapped for MMIO or fault
reasons.
There is no conceptual problem with extending Xen's emulation code, as
we are now expecting to have to emulate instructions which would
otherwise never have hit x86_emulate.
~Andrew
next prev parent reply other threads:[~2014-07-02 16:04 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-02 13:33 [PATCH RFC 1/9] xen: Emulate with no writes; compute current instruction length Razvan Cojocaru
2014-07-02 13:33 ` [PATCH RFC 2/9] xen: Optimize introspection access to guest state Razvan Cojocaru
2014-07-02 15:31 ` Andrew Cooper
2014-07-07 14:50 ` Razvan Cojocaru
2014-07-10 8:05 ` Razvan Cojocaru
2014-07-10 8:17 ` Andrew Cooper
2014-07-10 8:23 ` Razvan Cojocaru
2014-07-10 11:57 ` Razvan Cojocaru
2014-07-10 12:16 ` Razvan Cojocaru
2014-07-10 13:01 ` Andrew Cooper
2014-07-02 15:37 ` Jan Beulich
2014-07-03 8:12 ` Razvan Cojocaru
2014-07-03 8:54 ` Jan Beulich
2014-07-02 13:33 ` [PATCH RFC 3/9] xen: Force-enable relevant MSR events; optimize the number of sent MSR events Razvan Cojocaru
2014-07-02 15:35 ` Andrew Cooper
2014-07-02 15:43 ` Jan Beulich
2014-07-09 8:02 ` Razvan Cojocaru
2014-07-23 7:56 ` Jan Beulich
2014-07-23 8:03 ` Razvan Cojocaru
2014-07-02 13:33 ` [PATCH RFC 4/9] xenctrl: Make the headers C++ friendly Razvan Cojocaru
2014-07-02 15:37 ` Andrew Cooper
2014-07-02 13:33 ` [PATCH RFC 5/9] xen: Support for VMCALL mem_events Razvan Cojocaru
2014-07-02 15:47 ` Jan Beulich
2014-07-02 15:54 ` Razvan Cojocaru
2014-07-02 16:11 ` Jan Beulich
2014-07-02 16:23 ` Razvan Cojocaru
2014-07-03 6:28 ` Jan Beulich
2014-07-03 7:29 ` Razvan Cojocaru
2014-07-02 15:54 ` Andrew Cooper
2014-07-02 15:59 ` Razvan Cojocaru
2014-07-02 13:33 ` [PATCH RFC 6/9] xen, libxc: Request page fault injection via libxc Razvan Cojocaru
2014-07-02 15:51 ` Jan Beulich
2014-07-02 16:00 ` Andrew Cooper
2014-07-02 16:58 ` Mihai Donțu
2014-07-02 17:07 ` Andrew Cooper
2014-07-03 8:23 ` Mihai Donțu
2014-07-03 9:32 ` Andrew Cooper
2014-07-03 9:40 ` Razvan Cojocaru
2014-07-02 16:06 ` Razvan Cojocaru
2014-07-02 16:13 ` Jan Beulich
2014-07-02 13:33 ` [PATCH RFC 7/9] xen: Handle resumed instruction based on previous mem_event reply Razvan Cojocaru
2014-07-02 15:56 ` Jan Beulich
2014-07-03 8:55 ` Razvan Cojocaru
2014-07-03 9:02 ` Jan Beulich
2014-07-03 9:12 ` Razvan Cojocaru
2014-07-03 9:18 ` Andrew Cooper
2014-07-03 9:22 ` Jan Beulich
2014-07-03 9:34 ` Razvan Cojocaru
2014-07-03 10:14 ` Jan Beulich
2014-07-02 13:34 ` [PATCH RFC 8/9] xen: Generic instruction re-execution mechanism for execute faults Razvan Cojocaru
2014-07-02 16:04 ` Andrew Cooper [this message]
2014-07-02 13:34 ` [PATCH RFC 9/9] mm: mark pages that have their permissions controlled by a domain Razvan Cojocaru
2014-07-03 10:19 ` Jan Beulich
2014-07-03 11:27 ` Razvan Cojocaru
2014-07-03 12:15 ` Jan Beulich
2014-07-02 15:20 ` [PATCH RFC 1/9] xen: Emulate with no writes; compute current instruction length Andrew Cooper
2014-07-03 7:42 ` Razvan Cojocaru
2014-07-02 15:21 ` Jan Beulich
2014-07-02 15:43 ` Razvan Cojocaru
2014-07-02 16:08 ` Jan Beulich
2014-07-02 16:18 ` Razvan Cojocaru
2014-07-03 6:24 ` Jan Beulich
2014-07-03 7:38 ` Razvan Cojocaru
2014-07-03 8:05 ` Jan Beulich
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