From: Glauber de Oliveira Costa <gcosta@redhat.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>, ak@suse.de
Cc: Glauber de Oliveira Costa <glommer@gmail.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
lguest@ozlabs.org, linux-kernel@vger.kernel.org,
chrisw@sous-sol.org, anthony@codemonkey.ws,
Steven@smtp2.linux-foundation.org, akpm@linux-foundation.org,
virtualization@lists.linux-foundation.org, mingo@elte.hu,
akpm@linux-foundation.org
Subject: Re: [PATCH 23/25] [PATCH] paravirt hooks for arch initialization
Date: Fri, 10 Aug 2007 17:13:19 -0300 [thread overview]
Message-ID: <46BCC6DF.2040301@redhat.com> (raw)
In-Reply-To: <46BCC414.7060504@goop.org>
Jeremy Fitzhardinge escreveu:
> Glauber de Oliveira Costa wrote:
>> I think the idea you gave me earlier of using probe_kernel_address could
>> work. Xen/lguest/put_yours_here that won't use an ebda would then have
>> to unmap the page, to make sure a read would fault.
>
> Hm, the memory might be mapped anyway, but we could make sure its all
> zero. discover_ebda should be able to deal with that OK.
>
> J
Indeed, as the EBDA_ADDR_POINTER is not aligned, this may work even better.
It seems to me safe to assume that if we read zero on that line:
ebda_addr = *(unsigned short *)__va(EBDA_ADDR_POINTER);
We could just do ebda_size = 0 and go home happy, skipping the rest of
the process.
Andi, are you okay with it ?
next prev parent reply other threads:[~2007-08-10 20:12 UTC|newest]
Thread overview: 192+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-08 4:18 Introducing paravirt_ops for x86_64 Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 1/25] [PATCH] header file move Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 2/25] [PATCH] tlb flushing routines Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 3/25] [PATCH] irq_flags / halt routines Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 4/25] [PATCH] Add debugreg/load_rsp native hooks Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 5/25] [PATCH] native versions for system.h functions Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 6/25] [PATCH] add native_apic read and write functions, as well as boot clocks ones Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 7/25] [PATCH] interrupt related native paravirt functions Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 8/25] [PATCH] use macro for sti/cli in spinlock definitions Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 9/25] [PATCH] report ring kernel is running without paravirt Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 10/25] [PATCH] export math_state_restore Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 11/25] [PATCH] introduce paravirt_release_pgd() Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 12/25] [PATCH] native versions for set pagetables Glauber de Oliveira Costa
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 13/25] [PATCH] turn msr.h functions into native versions Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 14/25] [PATCH] add native functions for descriptors handling Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 15/25] [PATCH] get rid of inline asm for load_cr3 Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 16/25] [PATCH] introducing paravirt_activate_mm Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 17/25] [PATCH] turn page operations into native versions Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 18/25] [PATCH] turn priviled operations into macros in entry.S Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 19/25] [PATCH] time-related functions paravirt provisions Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 20/25] [PATCH] replace syscall_init Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 21/25] [PATCH] export cpu_gdt_descr Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 22/25] [PATCH] turn priviled operation into a macro Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 23/25] [PATCH] paravirt hooks for arch initialization Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 24/25] [PATCH] provide paravirt patching function Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 25/25] [PATCH] add paravirtualization support for x86_64 Glauber de Oliveira Costa
2007-08-08 10:00 ` Andi Kleen
2007-08-08 11:58 ` Steven Rostedt
2007-08-08 11:58 ` Steven Rostedt
2007-08-08 14:49 ` Glauber de Oliveira Costa
2007-08-08 14:49 ` Glauber de Oliveira Costa
2007-08-08 23:18 ` Rusty Russell
2007-08-08 23:18 ` Rusty Russell
2007-08-09 0:24 ` Andi Kleen
2007-08-09 0:44 ` Rusty Russell
2007-08-09 0:44 ` Rusty Russell
2007-08-09 5:38 ` Jeremy Fitzhardinge
2007-08-09 5:38 ` Jeremy Fitzhardinge
2007-08-09 0:24 ` Andi Kleen
2007-08-09 6:53 ` Jeremy Fitzhardinge
2007-08-09 6:53 ` Jeremy Fitzhardinge
2007-08-09 14:26 ` Andi Kleen
2007-08-09 14:26 ` Andi Kleen
2007-08-09 14:37 ` Steven Rostedt
2007-08-09 14:37 ` Steven Rostedt
2007-08-09 15:09 ` Jeremy Fitzhardinge
2007-08-09 15:09 ` Jeremy Fitzhardinge
2007-08-08 10:00 ` Andi Kleen
2007-08-09 6:35 ` Jeremy Fitzhardinge
2007-08-09 7:02 ` Glauber de Oliveira Costa
2007-08-09 7:02 ` Glauber de Oliveira Costa
2007-08-09 7:02 ` Jeremy Fitzhardinge
2007-08-09 7:07 ` Glauber de Oliveira Costa
2007-08-09 7:12 ` Jeremy Fitzhardinge
2007-08-09 7:12 ` Jeremy Fitzhardinge
2007-08-09 12:30 ` Steven Rostedt
2007-08-09 12:30 ` Steven Rostedt
2007-08-09 14:26 ` Andi Kleen
2007-08-09 14:26 ` Andi Kleen
2007-08-09 7:07 ` Glauber de Oliveira Costa
2007-08-09 7:02 ` Jeremy Fitzhardinge
2007-08-09 6:35 ` Jeremy Fitzhardinge
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 24/25] [PATCH] provide paravirt patching function Glauber de Oliveira Costa
2007-08-08 9:44 ` [PATCH 23/25] [PATCH] paravirt hooks for arch initialization Andi Kleen
2007-08-08 9:44 ` Andi Kleen
2007-08-08 14:08 ` Glauber de Oliveira Costa
2007-08-08 14:13 ` Andi Kleen
2007-08-08 14:13 ` Andi Kleen
2007-08-08 14:08 ` Glauber de Oliveira Costa
2007-08-09 17:43 ` Jeremy Fitzhardinge
2007-08-09 17:43 ` Jeremy Fitzhardinge
2007-08-09 18:03 ` Alan Cox
2007-08-09 18:03 ` Alan Cox
2007-08-10 18:08 ` Glauber de Oliveira Costa
2007-08-10 18:25 ` Alan Cox
2007-08-10 18:25 ` Alan Cox
2007-08-10 18:51 ` Jeremy Fitzhardinge
2007-08-10 18:51 ` Jeremy Fitzhardinge
2007-08-10 19:17 ` Glauber de Oliveira Costa
2007-08-10 19:17 ` Glauber de Oliveira Costa
2007-08-10 20:01 ` Jeremy Fitzhardinge
2007-08-10 20:01 ` Jeremy Fitzhardinge
2007-08-10 20:13 ` Glauber de Oliveira Costa
2007-08-10 20:13 ` Glauber de Oliveira Costa [this message]
2007-08-10 20:30 ` Jeremy Fitzhardinge
2007-08-10 20:30 ` Jeremy Fitzhardinge
2007-08-10 18:08 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 11:32 ` [PATCH 21/25] [PATCH] export cpu_gdt_descr Arjan van de Ven
2007-08-08 14:24 ` Glauber de Oliveira Costa
2007-08-08 14:24 ` Glauber de Oliveira Costa
2007-08-08 11:32 ` Arjan van de Ven
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 19/25] [PATCH] time-related functions paravirt provisions Glauber de Oliveira Costa
2007-08-08 9:38 ` [PATCH 18/25] [PATCH] turn priviled operations into macros in entry.S Andi Kleen
2007-08-08 9:38 ` Andi Kleen
2007-08-08 11:52 ` Steven Rostedt
2007-08-08 12:24 ` Andi Kleen
2007-08-08 12:37 ` Steven Rostedt
2007-08-08 13:52 ` Andi Kleen
2007-08-08 13:52 ` Andi Kleen
2007-08-08 13:23 ` Steven Rostedt
2007-08-08 13:26 ` Steven Rostedt
2007-08-08 13:26 ` Steven Rostedt
2007-08-08 13:30 ` Andi Kleen
2007-08-08 13:30 ` Andi Kleen
2007-08-08 13:47 ` Steven Rostedt
2007-08-08 14:03 ` Andi Kleen
2007-08-08 14:03 ` Andi Kleen
2007-08-08 17:07 ` Steven Rostedt
2007-08-08 17:07 ` Steven Rostedt
2007-08-09 5:21 ` Jeremy Fitzhardinge
2007-08-09 12:17 ` Steven Rostedt
2007-08-09 12:17 ` Steven Rostedt
2007-08-09 5:21 ` Jeremy Fitzhardinge
2007-08-08 13:47 ` Steven Rostedt
2007-08-08 13:29 ` Andi Kleen
2007-08-08 13:29 ` Andi Kleen
2007-08-08 14:01 ` Steven Rostedt
2007-08-08 14:01 ` Steven Rostedt
2007-08-08 13:23 ` Steven Rostedt
2007-08-08 12:37 ` Steven Rostedt
2007-08-08 12:24 ` Andi Kleen
2007-08-08 14:00 ` Glauber de Oliveira Costa
2007-08-08 14:00 ` Glauber de Oliveira Costa
2007-08-08 11:52 ` Steven Rostedt
2007-08-08 13:58 ` Glauber de Oliveira Costa
2007-08-08 13:58 ` Glauber de Oliveira Costa
2007-08-08 14:11 ` Andi Kleen
2007-08-08 14:11 ` Andi Kleen
2007-08-08 14:53 ` Glauber de Oliveira Costa
2007-08-08 14:53 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 16/25] [PATCH] introducing paravirt_activate_mm Glauber de Oliveira Costa
2007-08-08 4:19 ` [PATCH 15/25] [PATCH] get rid of inline asm for load_cr3 Glauber de Oliveira Costa
2007-08-08 9:25 ` [PATCH 13/25] [PATCH] turn msr.h functions into native versions Andi Kleen
2007-08-08 14:19 ` Glauber de Oliveira Costa
2007-08-08 14:23 ` Andi Kleen
2007-08-08 14:23 ` Andi Kleen
2007-08-08 14:19 ` Glauber de Oliveira Costa
2007-08-08 9:25 ` Andi Kleen
2007-08-08 4:18 ` [PATCH 10/25] [PATCH] export math_state_restore Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 9/25] [PATCH] report ring kernel is running without paravirt Glauber de Oliveira Costa
2007-08-09 5:52 ` [PATCH 7/25] [PATCH] interrupt related native paravirt functions Jeremy Fitzhardinge
2007-08-09 5:52 ` Jeremy Fitzhardinge
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 4:18 ` [PATCH 6/25] [PATCH] add native_apic read and write functions, as well as boot clocks ones Glauber de Oliveira Costa
2007-08-08 7:29 ` [PATCH 5/25] [PATCH] native versions for system.h functions Glauber de Oliveira Costa
2007-08-08 7:29 ` Glauber de Oliveira Costa
2007-08-08 9:16 ` [PATCH 4/25] [PATCH] Add debugreg/load_rsp native hooks Andi Kleen
2007-08-09 5:47 ` Jeremy Fitzhardinge
2007-08-09 5:47 ` Jeremy Fitzhardinge
2007-08-09 5:49 ` Glauber de Oliveira Costa
2007-08-09 5:49 ` Glauber de Oliveira Costa
2007-08-08 9:16 ` Andi Kleen
2007-08-08 4:18 ` Glauber de Oliveira Costa
2007-08-08 9:14 ` [PATCH 3/25] [PATCH] irq_flags / halt routines Andi Kleen
2007-08-08 14:10 ` Glauber de Oliveira Costa
2007-08-08 14:10 ` Glauber de Oliveira Costa
2007-08-08 14:14 ` Andi Kleen
2007-08-08 14:14 ` Andi Kleen
2007-08-08 14:23 ` Glauber de Oliveira Costa
2007-08-08 14:23 ` Glauber de Oliveira Costa
2007-08-09 7:29 ` Glauber de Oliveira Costa
2007-08-09 7:29 ` Glauber de Oliveira Costa
2007-08-08 9:14 ` Andi Kleen
2007-08-08 4:18 ` [PATCH 2/25] [PATCH] tlb flushing routines Glauber de Oliveira Costa
2007-08-08 14:53 ` Introducing paravirt_ops for x86_64 Nakajima, Jun
2007-08-08 14:53 ` Nakajima, Jun
2007-08-08 14:58 ` Glauber de Oliveira Costa
2007-08-09 0:28 ` Nakajima, Jun
2007-08-09 0:31 ` Glauber de Oliveira Costa
2007-08-09 0:31 ` Glauber de Oliveira Costa
2007-08-09 0:28 ` Nakajima, Jun
2007-08-09 5:35 ` Jeremy Fitzhardinge
2007-08-09 5:35 ` Jeremy Fitzhardinge
2007-08-09 12:46 ` [Lguest] " Steven Rostedt
2007-08-09 12:46 ` Steven Rostedt
2007-08-08 14:58 ` Glauber de Oliveira Costa
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