From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Juergen Gross <JGross@suse.com>,
grub-devel@gnu.org, wei.liu2@citrix.com, ian.campbell@citrix.com,
stefano.stabellini@eu.citrix.com, phcoder@gmail.com,
Daniel Kiper <daniel.kiper@oracle.com>,
roy.franz@linaro.org, ning.sun@intel.com,
david.vrabel@citrix.com, xen-devel@lists.xenproject.org,
qiaowei.ren@intel.com, keir@xen.org,
richard.l.maliszewski@intel.com, gang.wei@intel.com,
fu.wei@linaro.org
Subject: Re: [PATCH v2 22/23] x86: make Xen early boot code relocatable
Date: Fri, 28 Aug 2015 12:59:17 +0100 [thread overview]
Message-ID: <55E04D15.8030601@citrix.com> (raw)
In-Reply-To: <55E021C4020000780009DA95@prv-mh.provo.novell.com>
On 28/08/15 07:54, Jan Beulich wrote:
>
>> Therefore I am very much +1 get grub working.
> Then you kind of misunderstood: I'm not against getting grub2
> working (i.e. patches prior to this one are fine in principle). What
> I'm against is hacking around firmware+grub2 combinations not
> suitable for Xen's purposes (where one could argue which of the
> three is really at fault, and I'm far from convinced it's Xen).
Irrespective of the EFI angle, there are other good reasons for making
Xens boot code position-independent and able to be located elsewhere.
The region of memory between 0x10000 and 0x10fffe is at increased risk
of clobbering from buggy firmwares. I have submitted bugfixes to Xen
before, and there are further investigations which didn't result in
anything upstream.
Moving the Xen text section out of this high risk region would make even
legacy boot more reliable. Currently IMO it is a Xen bug that it
strictly must be placed at the 1MB boundary to boot.
~Andrew
next prev parent reply other threads:[~2015-08-28 11:59 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-20 14:28 [PATCH v2 00/23] x86: multiboot2 protocol support Daniel Kiper
2015-07-20 14:28 ` [PATCH v2 01/23] x86/boot: remove unneeded instruction Daniel Kiper
2015-07-24 16:22 ` Konrad Rzeszutek Wilk
2015-07-27 19:46 ` Daniel Kiper
2015-08-10 16:07 ` Konrad Rzeszutek Wilk
2015-07-20 14:28 ` [PATCH v2 02/23] x86/boot: copy only text section from *.lnk file to *.bin file Daniel Kiper
2015-07-20 14:28 ` [PATCH v2 03/23] x86: zero BSS using stosl instead of stosb Daniel Kiper
2015-07-20 14:28 ` [PATCH v2 04/23] x86/boot: call reloc() using cdecl calling convention Daniel Kiper
2015-08-10 16:33 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-17 15:44 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 05/23] x86/boot/reloc: create generic alloc and copy functions Daniel Kiper
2015-08-17 15:51 ` Jan Beulich
2015-08-17 22:03 ` Daniel Kiper
2015-07-20 14:29 ` [PATCH v2 06/23] x86/boot: use %ecx instead of %eax Daniel Kiper
2015-08-10 16:36 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 07/23] x86/boot/reloc: Rename some variables and rearrange code a bit Daniel Kiper
2015-08-10 16:40 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-17 15:55 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 08/23] x86: add multiboot2 protocol support Daniel Kiper
2015-08-10 19:17 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-13 19:22 ` Daniel Kiper
2015-08-14 10:03 ` Jan Beulich
2015-08-15 6:00 ` Andrew Cooper
2015-08-18 8:12 ` Jan Beulich
2015-08-18 12:00 ` Daniel Kiper
2015-08-18 14:20 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 09/23] efi: create efi_enabled() Daniel Kiper
2015-08-10 19:20 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-20 15:18 ` Jan Beulich
2015-08-22 12:33 ` Daniel Kiper
2015-08-24 11:29 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 10/23] efi: build xen.gz with EFI code Daniel Kiper
2015-08-10 19:24 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-20 15:39 ` Jan Beulich
2015-08-22 13:59 ` Daniel Kiper
2015-08-24 11:35 ` Jan Beulich
2015-08-24 20:54 ` Daniel Kiper
2015-08-25 10:50 ` Andrew Cooper
2015-08-25 15:39 ` Daniel Kiper
2015-08-25 12:09 ` Jan Beulich
2015-08-25 16:31 ` Daniel Kiper
2015-08-26 6:46 ` Jan Beulich
2015-08-26 12:33 ` Daniel Kiper
2015-08-26 12:40 ` Jan Beulich
2015-08-26 12:58 ` Daniel Kiper
2015-07-20 14:29 ` [PATCH v2 11/23] efi: split out efi_init() Daniel Kiper
2015-08-10 19:25 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 12/23] efi: split out efi_console_set_mode() Daniel Kiper
2015-08-10 19:25 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 13/23] efi: split out efi_get_gop() Daniel Kiper
2015-08-10 19:27 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 14/23] efi: split out efi_find_gop_mode() Daniel Kiper
2015-08-10 19:31 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-20 15:48 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 15/23] efi: split out efi_tables() Daniel Kiper
2015-08-10 19:32 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 16/23] efi: split out efi_variables() Daniel Kiper
2015-08-10 19:34 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 17/23] efi: split out efi_set_gop_mode() Daniel Kiper
2015-08-10 19:34 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 18/23] efi: split out efi_exit_boot() Daniel Kiper
2015-08-10 19:36 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-07-20 14:29 ` [PATCH v2 19/23] x86/efi: create new early memory allocator Daniel Kiper
2015-08-10 19:49 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-27 11:23 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 20/23] x86: add multiboot2 protocol support for EFI platforms Daniel Kiper
2015-08-10 20:07 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-11 15:23 ` Konrad Rzeszutek Wilk
2015-08-27 12:01 ` Jan Beulich
2015-09-22 15:21 ` Daniel Kiper
2015-09-22 15:58 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 21/23] x86/boot: implement early command line parser in C Daniel Kiper
2015-08-10 20:31 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-11 14:43 ` Konrad Rzeszutek Wilk
2015-08-27 12:43 ` Jan Beulich
2015-09-22 17:03 ` Daniel Kiper
2015-09-23 7:25 ` Jan Beulich
2015-07-20 14:29 ` [PATCH v2 22/23] x86: make Xen early boot code relocatable Daniel Kiper
2015-08-11 16:48 ` [Xen-devel] " Konrad Rzeszutek Wilk
2015-08-14 11:52 ` Daniel Kiper
2015-08-14 12:49 ` Jan Beulich
2015-08-14 13:59 ` Daniel Kiper
2015-08-14 14:32 ` Jan Beulich
2015-08-14 14:37 ` Daniel Kiper
2015-08-14 15:12 ` Jan Beulich
2015-08-14 15:20 ` Konrad Rzeszutek Wilk
2015-08-27 13:12 ` Jan Beulich
2015-08-27 15:10 ` Daniel Kiper
2015-08-27 15:29 ` Jan Beulich
2015-08-27 17:56 ` Ben Hildred
2015-08-28 8:22 ` [Xen-devel] " Jan Beulich
2015-08-28 13:42 ` Konrad Rzeszutek Wilk
2015-08-28 14:16 ` Jan Beulich
2015-08-31 19:49 ` Daniel Kiper
2015-09-01 6:59 ` Jan Beulich
2015-08-27 18:04 ` Andrew Cooper
2015-08-28 6:54 ` Jan Beulich
2015-08-28 11:59 ` Andrew Cooper [this message]
2015-08-28 14:24 ` [Xen-devel] " Jan Beulich
2015-07-20 14:29 ` [PATCH v2 23/23] x86: add multiboot2 protocol support for relocatable images Daniel Kiper
2015-08-11 16:56 ` Konrad Rzeszutek Wilk
2015-08-14 11:57 ` Daniel Kiper
2015-08-14 13:43 ` Konrad Rzeszutek Wilk
2015-07-21 9:39 ` [PATCH v2 00/23] x86: multiboot2 protocol support Jan Beulich
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