From: Ian Campbell <Ian.Campbell@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xen.org>,
"Tim Deegan (3P)" <Tim.Deegan@citrix.com>,
Stefano Stabellini <Stefano.Stabellini@eu.citrix.com>
Subject: Re: [PATCH 4/5] xen: introduce XEN_GUEST_HANDLE_PARAM
Date: Wed, 8 Aug 2012 08:48:40 +0100 [thread overview]
Message-ID: <1344412120.11783.4.camel@dagon.hellion.org.uk> (raw)
In-Reply-To: <50212F6902000078000933E4@nat28.tlf.novell.com>
On Tue, 2012-08-07 at 14:08 +0100, Jan Beulich wrote:
> See how
> x86-64 just recently got the ILP32 model [aka x32] added for
> this very reason.)
For userspace only though, with the kernel remaining a full 64-bit
kernel. I don't know what direction they eventually took but there was
also a contingent in favour of using the 64-bit syscall ABI for x32.
I don't think that the wastage at the hypercall interface is going to be
significant. Especially once you consider that many of the 32-bit fields
actually need to be 64-bit for a compat mode guest any, e.g. MFNs should
certainly be 64 bit regardless or else you impose limitations on 32-bit
guests which the 64-bit hypervisor doesn't itself have.
Ian.
next prev parent reply other threads:[~2012-08-08 7:48 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-06 14:11 [PATCH 0/5] ARM hypercall ABI: 64 bit ready Stefano Stabellini
2012-08-06 14:12 ` [PATCH 1/5] xen: improve changes to xen_add_to_physmap Stefano Stabellini
2012-08-06 14:24 ` Konrad Rzeszutek Wilk
2012-08-06 14:38 ` Stefano Stabellini
2012-08-06 15:32 ` Jan Beulich
2012-08-06 15:43 ` Stefano Stabellini
2012-08-06 15:54 ` Jan Beulich
2012-08-07 12:27 ` Stefano Stabellini
2012-08-07 12:40 ` Jean Guyader
2012-08-07 13:18 ` Jan Beulich
2012-08-07 17:07 ` Stefano Stabellini
2012-08-08 7:14 ` Jan Beulich
2012-08-08 7:45 ` Ian Campbell
2012-08-08 8:49 ` Jan Beulich
2012-08-08 9:51 ` Stefano Stabellini
2012-08-08 10:03 ` Jean Guyader
2012-08-08 10:08 ` Stefano Stabellini
2012-08-08 14:20 ` David Vrabel
2012-08-08 19:33 ` Jean Guyader
2012-08-07 13:02 ` Jan Beulich
2012-08-07 15:24 ` Ian Jackson
2012-08-07 15:37 ` Jan Beulich
2012-08-11 1:33 ` Mukesh Rathor
2012-08-13 10:43 ` Stefano Stabellini
2012-08-06 14:12 ` [PATCH 2/5] xen/arm: introduce __lshrdi3 and __aeabi_llsr Stefano Stabellini
2012-08-09 9:16 ` Ian Campbell
2012-08-09 9:43 ` Stefano Stabellini
2012-08-06 14:12 ` [PATCH 3/5] xen: few more xen_ulong_t substitutions Stefano Stabellini
2012-08-06 15:38 ` Jan Beulich
2012-08-07 12:08 ` Stefano Stabellini
2012-08-07 12:36 ` Ian Campbell
2012-08-07 13:13 ` Jan Beulich
2012-08-07 13:30 ` Ian Campbell
2012-08-07 12:54 ` Jan Beulich
2012-08-08 7:59 ` Ian Campbell
2012-08-08 12:12 ` Stefano Stabellini
2012-08-08 12:17 ` Ian Campbell
2012-08-08 14:07 ` Jan Beulich
2012-08-08 15:01 ` Stefano Stabellini
2012-08-08 15:12 ` Jan Beulich
2012-08-08 15:55 ` Stefano Stabellini
2012-08-06 14:12 ` [PATCH 4/5] xen: introduce XEN_GUEST_HANDLE_PARAM Stefano Stabellini
2012-08-06 15:43 ` Jan Beulich
2012-08-06 15:47 ` Ian Campbell
2012-08-06 15:58 ` Jan Beulich
2012-08-06 16:02 ` Stefano Stabellini
2012-08-07 6:24 ` Jan Beulich
2012-08-07 12:35 ` Stefano Stabellini
2012-08-07 12:39 ` Ian Campbell
2012-08-07 13:08 ` Jan Beulich
2012-08-07 18:09 ` Stefano Stabellini
2012-08-08 7:48 ` Ian Campbell [this message]
2012-08-08 8:54 ` Jan Beulich
2012-08-06 14:12 ` [PATCH 5/5] xen: replace XEN_GUEST_HANDLE with XEN_GUEST_HANDLE_PARAM when appropriate Stefano Stabellini
2012-08-06 14:39 ` [PATCH 0/5] ARM hypercall ABI: 64 bit ready David Vrabel
2012-08-06 14:44 ` Stefano Stabellini
2012-08-06 14:49 ` Stefano Stabellini
2012-08-06 14:59 ` David Vrabel
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