From: Matt Fleming <matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
To: Jan Beulich <JBeulich-IBi9RG/b67k@public.gmane.org>
Cc: david.vrabel-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org,
ian.campbell-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org,
stefano.stabellini-mvvWK6WmYclDPfheJLI6IQ@public.gmane.org,
jeremy-TSDbQ3PG+2Y@public.gmane.org,
fenghua.yu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
tony.luck-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
xen-devel-GuqFBffKawtpuQazS67q72D2FQJk+8+b@public.gmane.org,
boris.ostrovsky-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
Daniel Kiper
<daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>,
konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
eshelton-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org,
mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-ia64-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org
Subject: Re: [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform only
Date: Wed, 26 Mar 2014 13:31:19 +0000 [thread overview]
Message-ID: <20140326133119.GD24856@console-pimps.org> (raw)
In-Reply-To: <5332E2B9020000780000255D-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
On Wed, 26 Mar, at 01:22:49PM, Jan Beulich wrote:
> >>> On 26.03.14 at 14:00, <matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org> wrote:
> >
> > This could do with a little bit more explanation. Why is it not
> > necessary to mark the EFI memory map that was passed to the kernel as
> > reserved in memblock?
>
> Because that's in memory Dom0 doesn't even see: The EFI memory
> map is visible to the hypervisor only.
So where does boot_params.efi_info.efi_memmap point?
If nowhere (i.e. it's NULL) that's no problem because memblock_reserve()
handles zero size regions just fine.
--
Matt Fleming, Intel Open Source Technology Center
WARNING: multiple messages have this Message-ID (diff)
From: Matt Fleming <matt@console-pimps.org>
To: Jan Beulich <JBeulich@suse.com>
Cc: david.vrabel@citrix.com, ian.campbell@citrix.com,
stefano.stabellini@eu.citrix.com, jeremy@goop.org,
fenghua.yu@intel.com, matt.fleming@intel.com,
tony.luck@intel.com, x86@kernel.org, tglx@linutronix.de,
xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com,
Daniel Kiper <daniel.kiper@oracle.com>,
konrad.wilk@oracle.com, eshelton@pobox.com, mingo@redhat.com,
linux-efi@vger.kernel.org, linux-ia64@vger.kernel.org,
linux-kernel@vger.kernel.org, hpa@zytor.com
Subject: Re: [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform only
Date: Wed, 26 Mar 2014 13:31:19 +0000 [thread overview]
Message-ID: <20140326133119.GD24856@console-pimps.org> (raw)
In-Reply-To: <5332E2B9020000780000255D@nat28.tlf.novell.com>
On Wed, 26 Mar, at 01:22:49PM, Jan Beulich wrote:
> >>> On 26.03.14 at 14:00, <matt@console-pimps.org> wrote:
> >
> > This could do with a little bit more explanation. Why is it not
> > necessary to mark the EFI memory map that was passed to the kernel as
> > reserved in memblock?
>
> Because that's in memory Dom0 doesn't even see: The EFI memory
> map is visible to the hypervisor only.
So where does boot_params.efi_info.efi_memmap point?
If nowhere (i.e. it's NULL) that's no problem because memblock_reserve()
handles zero size regions just fine.
--
Matt Fleming, Intel Open Source Technology Center
next prev parent reply other threads:[~2014-03-26 13:31 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-25 20:57 [PATCH v3 0/5] xen: Add EFI support Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` [PATCH v3 1/5] efi: Add efi_init_ops variable Daniel Kiper
[not found] ` <1395781076-12000-1-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
[not found] ` <1395781076-12000-2-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-26 12:56 ` Matt Fleming
2014-03-26 12:56 ` Matt Fleming
2014-03-26 14:02 ` Daniel Kiper
2014-03-26 14:02 ` Daniel Kiper
2014-03-26 14:29 ` Matt Fleming
2014-03-26 14:29 ` Matt Fleming
2014-03-26 14:02 ` Daniel Kiper
2014-03-26 12:56 ` Matt Fleming
2014-03-25 20:57 ` [PATCH v3 2/5] efi: Export arch_tables variable Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-26 13:21 ` Jan Beulich
2014-03-26 13:21 ` Jan Beulich
2014-03-26 13:21 ` Jan Beulich
2014-03-26 14:08 ` Daniel Kiper
[not found] ` <5332E25F020000780000255A-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2014-03-26 14:08 ` Daniel Kiper
2014-03-26 14:08 ` Daniel Kiper
2014-03-26 14:08 ` Daniel Kiper
2014-03-26 14:17 ` Jan Beulich
2014-03-26 14:18 ` Matt Fleming
[not found] ` <20140326140800.GP3454-fJNZiO034lp9pOct4yEdx/3oZC3j2Omk@public.gmane.org>
2014-03-26 14:17 ` Jan Beulich
2014-03-26 14:17 ` Jan Beulich
2014-03-26 14:17 ` Jan Beulich
2014-03-26 14:18 ` Matt Fleming
2014-03-26 14:18 ` Matt Fleming
2014-03-26 14:18 ` Matt Fleming
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform only Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-26 13:00 ` Matt Fleming
[not found] ` <1395781076-12000-4-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-26 13:00 ` Matt Fleming
2014-03-26 13:00 ` Matt Fleming
2014-03-26 13:22 ` Jan Beulich
[not found] ` <20140326130009.GB24856-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-26 13:22 ` Jan Beulich
2014-03-26 13:22 ` Jan Beulich
2014-03-26 13:22 ` Jan Beulich
2014-03-26 13:31 ` Matt Fleming
[not found] ` <5332E2B9020000780000255D-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2014-03-26 13:31 ` Matt Fleming [this message]
2014-03-26 13:31 ` Matt Fleming
2014-03-26 13:39 ` Jan Beulich
[not found] ` <20140326133119.GD24856-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-26 13:39 ` Jan Beulich
2014-03-26 13:39 ` Jan Beulich
2014-03-26 13:39 ` Jan Beulich
2014-03-26 13:48 ` Daniel Kiper
2014-03-26 13:48 ` Daniel Kiper
2014-03-26 13:48 ` Daniel Kiper
[not found] ` <20140326134845.GN3454-fJNZiO034lp9pOct4yEdx/3oZC3j2Omk@public.gmane.org>
2014-03-26 13:57 ` Matt Fleming
2014-03-26 13:57 ` Matt Fleming
2014-03-26 22:01 ` Daniel Kiper
2014-03-26 22:01 ` Daniel Kiper
2014-03-26 22:01 ` Daniel Kiper
2014-03-26 22:35 ` Andrew Cooper
2014-03-26 22:35 ` [Xen-devel] " Andrew Cooper
2014-03-26 22:35 ` [Xen-devel] [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform onl Andrew Cooper
2014-03-26 13:57 ` [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform only Matt Fleming
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` [PATCH v3 4/5] xen: Define EFI related stuff Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-26 13:25 ` Jan Beulich
2014-03-26 13:25 ` Jan Beulich
2014-03-26 13:25 ` Jan Beulich
2014-03-26 14:58 ` Stefano Stabellini
2014-03-26 14:58 ` Stefano Stabellini
2014-03-26 14:58 ` Stefano Stabellini
2014-03-26 15:25 ` Jan Beulich
2014-03-26 15:25 ` Jan Beulich
2014-03-26 15:34 ` Stefano Stabellini
[not found] ` <5332FF6C02000078000027A5-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2014-03-26 15:34 ` Stefano Stabellini
2014-03-26 15:34 ` Stefano Stabellini
2014-03-26 15:34 ` Stefano Stabellini
2014-03-26 15:25 ` Jan Beulich
2014-03-26 14:58 ` Stefano Stabellini
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` [PATCH v3 5/5] xen: Put EFI machinery in place Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-25 20:57 ` Daniel Kiper
2014-03-26 13:12 ` Matt Fleming
[not found] ` <1395781076-12000-6-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2014-03-26 13:12 ` Matt Fleming
2014-03-26 13:12 ` Matt Fleming
[not found] ` <20140326131214.GC24856-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-26 13:31 ` Jan Beulich
2014-03-26 13:31 ` Jan Beulich
2014-03-26 13:31 ` Jan Beulich
2014-03-26 13:46 ` Matt Fleming
2014-03-26 13:46 ` Matt Fleming
2014-03-26 13:53 ` Matt Fleming
[not found] ` <20140326134617.GE24856-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2014-03-26 13:53 ` Matt Fleming
2014-03-26 13:53 ` Matt Fleming
2014-03-26 13:31 ` Jan Beulich
2014-04-22 18:38 ` [PATCH v3 0/5] xen: Add EFI support Eric Shelton
2014-04-23 9:28 ` Jan Beulich
2014-04-23 11:58 ` Eric Shelton
2014-04-23 12:07 ` Daniel Kiper
2014-04-23 13:29 ` Eric Shelton
2014-04-23 14:14 ` Jan Beulich
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