From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <JBeulich@suse.com>,
xen-devel <xen-devel@lists.xenproject.org>
Cc: Wei Liu <wei.liu2@citrix.com>
Subject: Re: [PATCH v2 0/3] x86emul: VME/PVI mode fixes
Date: Tue, 6 Nov 2018 14:21:53 +0000 [thread overview]
Message-ID: <b9ca2ccc-e4af-1b0c-cac5-d405ff2143d3@citrix.com> (raw)
In-Reply-To: <5BE1981502000078001F89C7@prv1-mh.provo.novell.com>
On 06/11/18 13:33, Jan Beulich wrote:
> 1: skip VIF processing in VME mode for 16-bit POPF at IOPL 3
> 2: raise #GP(0) in VME mode for POPF with TF set in new value
I'm afraid that I think there is still a bug with PVI emulation.
We only ever read cr4 when operating in vm86, which means that the later
logic checking VME doesn't apply to 16bit protected mode execution.
~Andrew
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next prev parent reply other threads:[~2018-11-06 14:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-02 16:42 [PATCH 0/3] x86emul: VME/PVI mode fixes Jan Beulich
2018-11-02 16:45 ` [PATCH 1/3] x86emul: VME and PVI modes require a #GP(0) check first thing Jan Beulich
2018-11-02 18:04 ` Andrew Cooper
2018-11-02 16:45 ` [PATCH 2/3] x86emul: raise #GP(0) in VME mode for POPF with TF set in new value Jan Beulich
2018-11-02 18:14 ` Andrew Cooper
2018-11-05 9:47 ` Jan Beulich
2018-11-02 16:46 ` [PATCH 3/3] x86emul: consolidate CR4 handling Jan Beulich
2018-11-02 18:24 ` Andrew Cooper
2018-11-05 9:55 ` Jan Beulich
2018-11-06 13:33 ` [PATCH v2 0/3] x86emul: VME/PVI mode fixes Jan Beulich
2018-11-06 13:44 ` [PATCH v2 1/3] x86emul: skip VIF processing in VME mode for 16-bit POPF at IOPL 3 Jan Beulich
2018-12-03 19:23 ` Andrew Cooper
2018-11-06 13:45 ` [PATCH v2 2/3] x86emul: raise #GP(0) in VME mode for POPF with TF set in new value Jan Beulich
2018-12-03 19:24 ` Andrew Cooper
2018-11-06 13:45 ` [PATCH v2 3/3] x86emul: consolidate CR4 handling Jan Beulich
2018-12-03 19:37 ` Andrew Cooper
2018-12-04 9:54 ` Jan Beulich
2018-11-06 14:21 ` Andrew Cooper [this message]
2018-11-06 14:48 ` [PATCH v2 0/3] x86emul: VME/PVI mode fixes Jan Beulich
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