From: "Jan Beulich" <JBeulich@suse.com>
To: Ian Campbell <Ian.Campbell@citrix.com>, Roy Franz <roy.franz@linaro.org>
Cc: keir@xen.org, tim@xen.org, stefano.stabellini@citrix.com,
fu.wei@linaro.org, xen-devel@lists.xen.org
Subject: Re: [PATCH V5 02/15] Move x86 specific funtions/variables to arch header
Date: Mon, 22 Sep 2014 12:31:27 +0100 [thread overview]
Message-ID: <542024AF0200007800036DDB@mail.emea.novell.com> (raw)
In-Reply-To: <1411384185.18331.41.camel@kazak.uk.xensource.com>
>>> On 22.09.14 at 13:09, <Ian.Campbell@citrix.com> wrote:
> On Mon, 2014-09-22 at 11:56 +0100, Jan Beulich wrote:
>> >>> On 22.09.14 at 12:52, <Ian.Campbell@citrix.com> wrote:
>> > On Fri, 2014-09-19 at 09:37 +0100, Jan Beulich wrote:
>> >> Hmm, so you're still moving the relocation processing code - why? I
>> >> don't recall you having said you're sure you'll not need this on ARM.
>> >
>> > ARM relocates itself to the top of memory during bringup already. I
>> > don't think we need to do it here as well/instead.
>>
>> There are two relocations (on x86) actually: One (always used) is
>> to move the hypervisor image to high physical memory. The other
>> (needed under UEFI only) is to relocate the hypervisor from where
>> the UEFI loader put it (running in physical mode, virtual and
>> physical addresses are the same) to its linked virtual address. Are
>> you saying that ARM isn't in need of this?
>
> Correct, the main ARM entry point (which the UEFI stub calls) takes care
> of enabling paging, including handling the move from (potentially
> differing) physical to virtual addresses.
Ah, right - this really makes the need for doing the extra relocation
step x86-64-specific. So Roy, I withdraw my objection then to moving
these pieces into arch-specific code.
Jan
next prev parent reply other threads:[~2014-09-22 11:31 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 22:49 [PATCH V5 00/15] arm64 EFI stub Roy Franz
2014-09-18 22:49 ` [PATCH V5 01/15] move x86 EFI boot/runtime code to common/efi Roy Franz
2014-09-19 8:49 ` Jan Beulich
2014-09-22 10:51 ` Ian Campbell
2014-09-18 22:49 ` [PATCH V5 02/15] Move x86 specific funtions/variables to arch header Roy Franz
2014-09-19 8:37 ` Jan Beulich
2014-09-22 10:52 ` Ian Campbell
2014-09-22 10:56 ` Jan Beulich
2014-09-22 11:09 ` Ian Campbell
2014-09-22 11:31 ` Jan Beulich [this message]
2014-09-22 12:54 ` Jan Beulich
2014-09-23 2:08 ` Roy Franz
2014-09-23 12:24 ` Jan Beulich
2014-09-24 2:35 ` Roy Franz
2014-09-24 8:12 ` Jan Beulich
2014-09-18 22:49 ` [PATCH V5 03/15] create arch functions to allocate memory for and process EFI memory map Roy Franz
2014-09-19 8:47 ` Jan Beulich
2014-09-23 1:14 ` Roy Franz
2014-09-18 22:49 ` [PATCH V5 04/15] Add architecture functions for pre/post ExitBootServices Roy Franz
2014-09-22 12:11 ` Jan Beulich
2014-09-18 22:49 ` [PATCH V5 05/15] Add efi_arch_cfg_file_early/late() to handle arch specific cfg file fields Roy Franz
2014-09-22 12:13 ` Jan Beulich
2014-09-18 22:49 ` [PATCH V5 06/15] Add efi_arch_handle_cmdline() for processing commandline Roy Franz
2014-09-22 12:17 ` Jan Beulich
2014-09-23 1:40 ` Roy Franz
2014-09-23 12:25 ` Jan Beulich
2014-09-24 0:09 ` Roy Franz
2014-09-24 8:13 ` Jan Beulich
2014-09-24 9:33 ` Ian Campbell
2014-09-24 11:34 ` Jan Beulich
2014-09-18 22:49 ` [PATCH V5 07/15] Move x86 specific disk probing code Roy Franz
2014-09-22 12:20 ` Jan Beulich
2014-09-23 1:44 ` Roy Franz
2014-09-18 22:49 ` [PATCH V5 08/15] Create arch functions for console and video init Roy Franz
2014-09-22 12:21 ` Jan Beulich
2014-09-18 22:50 ` [PATCH V5 09/15] Add efi_arch_memory() for arch specific memory setup Roy Franz
2014-09-22 12:24 ` Jan Beulich
2014-09-23 1:45 ` Roy Franz
2014-09-18 22:50 ` [PATCH V5 10/15] Add arch specific module handling to read_file() Roy Franz
2014-09-22 12:44 ` Jan Beulich
2014-09-23 1:57 ` Roy Franz
2014-09-23 12:28 ` Jan Beulich
2014-09-23 12:41 ` Ian Campbell
2014-09-23 12:55 ` Jan Beulich
2014-09-24 1:23 ` Roy Franz
2014-09-24 4:43 ` Roy Franz
2014-09-24 8:18 ` Jan Beulich
2014-09-18 22:50 ` [PATCH V5 11/15] Add several misc. arch functions for EFI boot code Roy Franz
2014-09-22 12:45 ` Jan Beulich
2014-09-18 22:50 ` [PATCH V5 12/15] Add efi_arch_use_config_file() function to control use of config file Roy Franz
2014-09-22 12:48 ` Jan Beulich
2014-09-23 1:59 ` Roy Franz
2014-09-18 22:50 ` [PATCH V5 13/15] add arm64 cache flushing code from linux v3.16 Roy Franz
2014-09-22 10:54 ` Ian Campbell
2014-09-22 23:42 ` Roy Franz
2014-09-23 7:42 ` Ian Campbell
2014-09-18 22:50 ` [PATCH V5 14/15] Update libfdt to v1.4.0 Roy Franz
2014-09-22 11:20 ` Ian Campbell
2014-09-22 23:57 ` Roy Franz
2014-09-23 7:43 ` Ian Campbell
2014-09-18 22:50 ` [PATCH V5 15/15] Add ARM EFI boot support Roy Franz
2014-09-22 11:20 ` Ian Campbell
2014-09-22 23:50 ` Roy Franz
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