From: Joerg Roedel <joerg.roedel@amd.com>
To: Gleb Natapov <gleb@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, <kvm@vger.kernel.org>
Subject: Re: [RFC PATCH] emulator: Fix task switch into/out of VM86
Date: Tue, 10 Jan 2012 18:51:59 +0100 [thread overview]
Message-ID: <20120110175159.GF7166@amd.com> (raw)
In-Reply-To: <20120110113047.GM2167@redhat.com>
On Tue, Jan 10, 2012 at 01:30:47PM +0200, Gleb Natapov wrote:
> On Tue, Jan 10, 2012 at 12:25:18PM +0100, Kevin Wolf wrote:
> > Did that now, and it looks like exit_int_info is always 0 during the
> > task switch intercept for a task gate in the IDT. So special-casing VM86
> > won't help, I'm afraid.
> >
> Joerg, do you know how can we check that task switch was cause by an
> exception triggering task gate if exit_int_info is not provided during
> intercept (short of decoding instruction that caused intercept to see if
> it's a call to a gate, which is racy) ?
Hmm, havn't found a solution yet. But I will check further and let you
know if I find out something.
Joerg
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next prev parent reply other threads:[~2012-01-10 17:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-09 20:10 [RFC PATCH] emulator: Fix task switch into/out of VM86 Kevin Wolf
2012-01-10 3:08 ` Takuya Yoshikawa
2012-01-10 4:07 ` Takuya Yoshikawa
2012-01-10 9:01 ` Gleb Natapov
2012-01-10 9:28 ` Kevin Wolf
2012-01-10 10:17 ` Gleb Natapov
2012-01-10 11:25 ` Kevin Wolf
2012-01-10 11:30 ` Gleb Natapov
2012-01-10 17:51 ` Joerg Roedel [this message]
2012-01-16 15:37 ` Kevin Wolf
2012-01-16 15:57 ` Joerg Roedel
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