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: 29+ 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 ` [PATCH v3 1/5] efi: Add efi_init_ops variable Daniel Kiper
2014-03-26 12:56 ` Matt Fleming
2014-03-26 14:02 ` Daniel Kiper
2014-03-26 14:29 ` Matt Fleming
2014-03-25 20:57 ` [PATCH v3 2/5] efi: Export arch_tables variable Daniel Kiper
2014-03-26 13:21 ` Jan Beulich
2014-03-26 14:08 ` Daniel Kiper
2014-03-26 14:17 ` Jan Beulich
2014-03-26 14:18 ` Matt Fleming
2014-03-25 20:57 ` [PATCH v3 3/5] x86: Call efi_memblock_x86_reserve_range() on native EFI platform only Daniel Kiper
2014-03-26 13:00 ` Matt Fleming
2014-03-26 13:22 ` Jan Beulich
2014-03-26 13:31 ` Matt Fleming [this message]
2014-03-26 13:39 ` Jan Beulich
2014-03-26 13:48 ` Daniel Kiper
2014-03-26 13:57 ` Matt Fleming
2014-03-26 22:01 ` Daniel Kiper
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
2014-03-25 20:57 ` [PATCH v3 4/5] xen: Define EFI related stuff Daniel Kiper
2014-03-26 13:25 ` Jan Beulich
2014-03-26 14:58 ` Stefano Stabellini
2014-03-26 15:25 ` Jan Beulich
2014-03-26 15:34 ` Stefano Stabellini
2014-03-25 20:57 ` [PATCH v3 5/5] xen: Put EFI machinery in place Daniel Kiper
2014-03-26 13:12 ` Matt Fleming
2014-03-26 13:31 ` Jan Beulich
2014-03-26 13:46 ` Matt Fleming
2014-03-26 13:53 ` Matt Fleming
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