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From: George Dunlap <dunlapg@umich.edu>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: StefanoStabellini <stefano.stabellini@citrix.com>,
	Ian Campbell <ian.campbell@citrix.com>,
	Jan Beulich <JBeulich@suse.com>,
	Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH] x86/hvm: Allow the guest to permit the use of userspace hypercalls
Date: Tue, 12 Jan 2016 11:03:52 +0000	[thread overview]
Message-ID: <CAFLBxZZGQaNzfAS-f5Z0bvhfc23r_k1OtwO00P_gntLZLfy0kg@mail.gmail.com> (raw)
In-Reply-To: <5694DC0E.7020001@citrix.com>

On Tue, Jan 12, 2016 at 10:57 AM, Andrew Cooper
<andrew.cooper3@citrix.com> wrote:
> Writing a PV guest from scratch has been very enlightening to
> demonstrate how much of a trainwreck the ABI is.  Almost nothing is
> documented.  Some bits which are documented are misleading.  Several
> areas needlessly deviate from x86 architectural behaviour.  Almost any
> deviation from the way Linux does things ends up in situations which
> don't function.

Something I think HPA has been complaining about for nearly a decade
now I think...

 -George

  reply	other threads:[~2016-01-12 11:03 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-11 13:59 [PATCH] x86/hvm: Allow the guest to permit the use of userspace hypercalls Andrew Cooper
2016-01-11 14:32 ` Paul Durrant
2016-01-11 14:44 ` Jan Beulich
2016-01-11 17:17   ` Andrew Cooper
2016-01-11 18:26     ` David Vrabel
2016-01-11 18:32       ` Andrew Cooper
2016-01-11 18:40         ` David Vrabel
2016-01-11 18:50           ` Andrew Cooper
2016-01-12 12:07       ` Stefano Stabellini
2016-01-12 15:06         ` Jan Beulich
2016-01-12 17:05           ` Stefano Stabellini
2016-01-12 17:10             ` Juergen Gross
2016-01-12 17:23               ` Stefano Stabellini
2016-01-13  5:12                 ` Juergen Gross
2016-01-13 10:41                   ` Stefano Stabellini
2016-01-13 11:14                     ` Juergen Gross
2016-01-13 11:26                       ` Stefano Stabellini
2016-01-13 11:32                         ` Juergen Gross
2016-01-13 11:42         ` David Vrabel
2016-01-13 12:51           ` Stefano Stabellini
2016-01-12  7:33     ` Jan Beulich
2016-01-12 10:57       ` Andrew Cooper
2016-01-12 11:03         ` George Dunlap [this message]
2016-01-14 10:50 ` Ian Campbell

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