From: "H. Peter Anvin" <hpa@zytor.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: the arch/x86 maintainers <x86@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Xen-devel <xen-devel@lists.xensource.com>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: Re: [PATCH] paravirt/xen: add pvop for page_is_ram
Date: Mon, 09 Mar 2009 18:07:47 -0700 [thread overview]
Message-ID: <49B5BD63.1090909@zytor.com> (raw)
In-Reply-To: <1235786365-17744-10-git-send-email-jeremy@goop.org>
Jeremy Fitzhardinge wrote:
> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
>
> A guest domain may have external pages mapped into its address space,
> in order to share memory with other domains. These shared pages are
> more akin to io mappings than real RAM, and should not pass the
> page_is_ram test. Add a paravirt op for this so that a hypervisor
> backend can validate whether a page should be considered ram or not.
>
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
>
Why are these pages mapped as RAM in the memory map? That is the right
way to handle that, not by adding yet another bloody hook...
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-03-10 1:11 UTC|newest]
Thread overview: 121+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-28 1:59 [PATCH] xen: core dom0 support Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen dom0: Make hvc_xen console work for dom0 Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen dom0: Initialize xenbus " Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen dom0: Set up basic IO permissions " Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen-dom0: only selectively disable cpu features Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen dom0: Add support for the platform_ops hypercall Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Add mtrr_ops support for Xen mtrr Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen: disable PAT Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen/dom0: use _PAGE_IOMAP in ioremap to do machine mappings Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] paravirt/xen: add pvop for page_is_ram Jeremy Fitzhardinge
2009-03-10 1:07 ` H. Peter Anvin [this message]
2009-03-10 21:19 ` Jeremy Fitzhardinge
2009-03-10 21:19 ` Jeremy Fitzhardinge
2009-03-10 22:21 ` H. Peter Anvin
2009-03-10 22:44 ` Jeremy Fitzhardinge
2009-03-10 22:44 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen/dom0: Use host E820 map Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen: implement XENMEM_machphys_mapping Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen: clear reserved bits in l3 entries given in the initial pagetables Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen/dom0: add XEN_DOM0 config option Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen: allow enable use of VGA console on dom0 Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Use specific cpu_has_foo macros instead of generic cpu_has() Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Kill some unneccessary includes Jeremy Fitzhardinge
2009-02-28 1:59 ` Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Use generic_validate_add_page() Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Implement xen_get_free_region() Jeremy Fitzhardinge
2009-02-28 1:59 ` [PATCH] xen mtrr: Add xen_{get,set}_mtrr() implementations Jeremy Fitzhardinge
2009-02-28 5:28 ` [PATCH] xen: core dom0 support Andrew Morton
2009-02-28 6:52 ` Jeremy Fitzhardinge
2009-02-28 6:52 ` Jeremy Fitzhardinge
2009-02-28 7:20 ` Ingo Molnar
2009-02-28 7:20 ` Ingo Molnar
2009-02-28 8:05 ` Jeremy Fitzhardinge
2009-02-28 8:05 ` Jeremy Fitzhardinge
2009-02-28 8:36 ` Ingo Molnar
2009-02-28 8:36 ` Ingo Molnar
2009-02-28 9:57 ` Jeremy Fitzhardinge
2009-02-28 9:57 ` Jeremy Fitzhardinge
2009-03-02 9:26 ` Gerd Hoffmann
2009-03-02 9:26 ` Gerd Hoffmann
2009-03-02 12:04 ` Ingo Molnar
2009-03-02 12:04 ` Ingo Molnar
2009-03-02 12:26 ` Gerd Hoffmann
2009-03-02 12:26 ` Gerd Hoffmann
2009-02-28 12:09 ` Nick Piggin
2009-02-28 12:09 ` Nick Piggin
2009-02-28 18:11 ` [Xen-devel] " Jody Belka
2009-02-28 18:11 ` Jody Belka
2009-02-28 18:15 ` Andi Kleen
2009-03-01 23:38 ` Jeremy Fitzhardinge
2009-03-01 23:38 ` Jeremy Fitzhardinge
2009-03-02 0:14 ` Andi Kleen
2009-03-01 23:27 ` Jeremy Fitzhardinge
2009-03-01 23:27 ` Jeremy Fitzhardinge
2009-03-02 6:37 ` Nick Piggin
2009-03-02 6:37 ` Nick Piggin
2009-03-02 8:05 ` Jeremy Fitzhardinge
2009-03-02 8:05 ` Jeremy Fitzhardinge
2009-03-02 8:19 ` Nick Piggin
2009-03-02 8:19 ` Nick Piggin
2009-03-02 9:05 ` Jeremy Fitzhardinge
2009-03-04 17:34 ` Anthony Liguori
2009-03-04 17:34 ` Anthony Liguori
2009-03-04 17:38 ` Jeremy Fitzhardinge
2009-03-04 17:38 ` Jeremy Fitzhardinge
2009-03-05 10:59 ` [Xen-devel] " George Dunlap
2009-03-05 10:59 ` George Dunlap
2009-03-05 14:37 ` [Xen-devel] " Anthony Liguori
2009-03-05 14:37 ` Anthony Liguori
2009-03-04 17:31 ` Anthony Liguori
2009-03-04 17:31 ` Anthony Liguori
2009-03-04 19:03 ` Anthony Liguori
2009-03-04 19:16 ` H. Peter Anvin
2009-03-04 19:33 ` Anthony Liguori
2009-03-04 19:33 ` Anthony Liguori
2009-02-28 16:14 ` Andi Kleen
2009-03-01 23:34 ` Jeremy Fitzhardinge
2009-03-01 23:34 ` Jeremy Fitzhardinge
2009-03-01 23:52 ` H. Peter Anvin
2009-03-02 0:08 ` Jeremy Fitzhardinge
2009-03-02 0:08 ` Jeremy Fitzhardinge
2009-03-02 0:14 ` H. Peter Anvin
2009-03-02 0:42 ` Jeremy Fitzhardinge
2009-03-02 0:42 ` Jeremy Fitzhardinge
2009-03-02 0:46 ` H. Peter Anvin
2009-03-02 0:10 ` Andi Kleen
2009-02-28 8:42 ` Ingo Molnar
2009-02-28 8:42 ` Ingo Molnar
2009-02-28 9:46 ` Jeremy Fitzhardinge
2009-02-28 9:46 ` Jeremy Fitzhardinge
2009-03-02 12:08 ` Ingo Molnar
2009-03-02 12:08 ` Ingo Molnar
2009-03-07 9:06 ` Jeremy Fitzhardinge
2009-03-07 9:06 ` Jeremy Fitzhardinge
2009-03-08 11:01 ` Ingo Molnar
2009-03-08 11:01 ` Ingo Molnar
2009-03-08 21:56 ` H. Peter Anvin
2009-03-08 22:06 ` Ingo Molnar
2009-03-08 22:06 ` Ingo Molnar
2009-03-08 22:08 ` H. Peter Anvin
2009-03-08 22:12 ` Ingo Molnar
2009-03-08 22:12 ` Ingo Molnar
2009-03-09 18:06 ` Jeremy Fitzhardinge
2009-03-09 18:06 ` Jeremy Fitzhardinge
2009-03-10 12:44 ` Ingo Molnar
2009-03-10 12:44 ` Ingo Molnar
2009-03-10 12:49 ` Nick Piggin
2009-03-10 12:49 ` Nick Piggin
2009-03-05 13:52 ` Morten P.D. Stevens
2009-03-08 14:25 ` Manfred Knick
2009-03-09 19:51 ` Morten P.D. Stevens
2009-03-09 20:00 ` Morten P.D. Stevens
2009-02-28 6:17 ` Boris Derzhavets
2009-02-28 6:23 ` [Xen-devel] " Jeremy Fitzhardinge
2009-02-28 6:23 ` Jeremy Fitzhardinge
2009-02-28 6:28 ` Boris Derzhavets
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