From: Matthew Garrett <mjg59@srcf.ucam.org>
To: Borislav Petkov <bp@alien8.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
Ingo Molnar <mingo@kernel.org>,
Linux EFI <linux-efi@vger.kernel.org>,
Matt Fleming <matt@console-pimps.org>, X86 ML <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>, Borislav Petkov <bp@suse.de>
Subject: Re: [PATCH -v2 0/4] EFI 1:1 mapping
Date: Thu, 20 Jun 2013 19:17:31 +0100 [thread overview]
Message-ID: <20130620181731.GA27960@srcf.ucam.org> (raw)
In-Reply-To: <20130620181445.GA791@pd.tnic>
On Thu, Jun 20, 2013 at 08:14:45PM +0200, Borislav Petkov wrote:
> On Thu, Jun 20, 2013 at 07:10:15PM +0100, Matthew Garrett wrote:
> > Because Windows passes high addresses to SetVirtualAddressMap(), and
> > because if you can imagine firmware developers getting it wrong then
> > firmware developers will have got it wrong.
>
> Can we reversely assume that if we'd used fixed high offsets, as hpa
> suggests, then it'll be fine? IOW, are any high addresses, even fixed
> ones, fine?
Windows actually seems to start at the top of address space and go down
- this is what I get booting Windows 8 under kvm. It looks like very
high addresses are fine, and we're currently using "low" high addresses,
so I suspect we're fine pretty much anywhere in that range.
****** SetVirtualAddressMap
Type: 5
Physical Start: 3E878000
Virtual Start: FFFFFFFFFFBEB000
Number Of Pages: 15
Attributes: 800000000000000F
Type: 6
Physical Start: 3E88D000
Virtual Start: FFFFFFFFFFBD6000
Number Of Pages: 15
Attributes: 800000000000000F
Type: 5
Physical Start: 3FB22000
Virtual Start: FFFFFFFFFFBA6000
Number Of Pages: 30
Attributes: 800000000000000F
Type: 6
Physical Start: 3FB52000
Virtual Start: FFFFFFFFFFB82000
Number Of Pages: 24
Attributes: 800000000000000F
Type: 6
Physical Start: 3FFE0000
Virtual Start: FFFFFFFFFFB62000
Number Of Pages: 20
--
Matthew Garrett | mjg59@srcf.ucam.org
next prev parent reply other threads:[~2013-06-20 18:17 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-17 17:50 [PATCH -v2 0/4] EFI 1:1 mapping Borislav Petkov
[not found] ` <1371491416-11037-1-git-send-email-bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
2013-06-17 17:50 ` [PATCH -v2 1/4] efi: Convert runtime services function ptrs Borislav Petkov
2013-06-17 17:50 ` Borislav Petkov
2013-06-20 18:15 ` [PATCH] [IA64] sim: Add casts to avoid assignment warnings Luck, Tony
2013-06-20 23:43 ` Tony Luck
2013-06-21 10:26 ` Fleming, Matt
2013-06-19 12:52 ` [PATCH -v2 0/4] EFI 1:1 mapping Ingo Molnar
2013-06-19 12:52 ` Ingo Molnar
[not found] ` <20130619125243.GD11209-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-06-19 13:02 ` Borislav Petkov
2013-06-19 13:02 ` Borislav Petkov
[not found] ` <20130619130225.GA28311-fF5Pk5pvG8Y@public.gmane.org>
2013-06-19 13:04 ` Ingo Molnar
2013-06-19 13:04 ` Ingo Molnar
[not found] ` <20130619130434.GB24957-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-06-19 13:25 ` Borislav Petkov
2013-06-19 13:25 ` Borislav Petkov
2013-06-19 16:08 ` Matthew Garrett
2013-06-19 16:08 ` Matthew Garrett
[not found] ` <20130619160804.GB27832-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-19 16:18 ` Borislav Petkov
2013-06-19 16:18 ` Borislav Petkov
[not found] ` <20130619161827.GF28300-fF5Pk5pvG8Y@public.gmane.org>
2013-06-19 16:21 ` Matthew Garrett
2013-06-19 16:21 ` Matthew Garrett
2013-06-19 16:38 ` Borislav Petkov
[not found] ` <20130619163804.GG28300-fF5Pk5pvG8Y@public.gmane.org>
2013-06-19 16:48 ` Matthew Garrett
2013-06-19 16:48 ` Matthew Garrett
[not found] ` <20130619164822.GA28240-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-19 16:59 ` Borislav Petkov
2013-06-19 16:59 ` Borislav Petkov
[not found] ` <20130619165902.GH28300-fF5Pk5pvG8Y@public.gmane.org>
2013-06-20 21:26 ` H. Peter Anvin
2013-06-20 21:26 ` H. Peter Anvin
2013-06-21 6:34 ` Matt Fleming
2013-06-21 6:34 ` Matt Fleming
2013-06-19 16:50 ` James Bottomley
2013-06-20 9:13 ` Ingo Molnar
2013-06-20 9:13 ` Ingo Molnar
[not found] ` <20130620091321.GB6811-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-06-20 9:15 ` Matthew Garrett
2013-06-20 9:15 ` Matthew Garrett
2013-06-20 9:22 ` Ingo Molnar
[not found] ` <20130620092237.GA6943-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-06-20 9:33 ` Borislav Petkov
2013-06-20 9:33 ` Borislav Petkov
2013-06-20 9:44 ` Matthew Garrett
[not found] ` <20130620094446.GA17882-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-20 14:33 ` Jiri Kosina
2013-06-20 14:33 ` Jiri Kosina
2013-06-20 14:53 ` James Bottomley
2013-06-20 14:53 ` James Bottomley
2013-06-20 16:29 ` Matthew Garrett
2013-06-20 16:29 ` Matthew Garrett
[not found] ` <20130620162916.GA25727-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-20 16:44 ` Jiri Kosina
2013-06-20 16:44 ` Jiri Kosina
[not found] ` <alpine.LRH.2.00.1306201843430.3478-1ReQVI26iDCaZKY3DrU6dA@public.gmane.org>
2013-06-20 16:53 ` Matthew Garrett
2013-06-20 16:53 ` Matthew Garrett
2013-06-20 16:46 ` James Bottomley
2013-06-20 16:46 ` James Bottomley
2013-06-20 16:54 ` Matthew Garrett
2013-06-20 16:54 ` Matthew Garrett
2013-06-20 17:01 ` Borislav Petkov
2013-06-20 17:12 ` Matthew Garrett
[not found] ` <20130620171210.GA26593-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-20 18:08 ` Borislav Petkov
2013-06-20 18:08 ` Borislav Petkov
2013-06-20 18:10 ` Matthew Garrett
[not found] ` <20130620181015.GA27833-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-20 18:14 ` Borislav Petkov
2013-06-20 18:14 ` Borislav Petkov
2013-06-20 18:17 ` Matthew Garrett [this message]
[not found] ` <20130620181731.GA27960-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2013-06-20 18:47 ` Borislav Petkov
2013-06-20 18:47 ` Borislav Petkov
[not found] ` <20130620184736.GC19877-fF5Pk5pvG8Y@public.gmane.org>
2013-06-20 22:35 ` H. Peter Anvin
2013-06-20 22:35 ` H. Peter Anvin
[not found] ` <51C383AC.4060706-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-06-21 7:23 ` Borislav Petkov
2013-06-21 7:23 ` Borislav Petkov
[not found] ` <20130621072356.GA22006-fF5Pk5pvG8Y@public.gmane.org>
2013-06-21 10:05 ` H. Peter Anvin
2013-06-21 10:05 ` H. Peter Anvin
[not found] ` <ca8f8134-24d9-4f96-8876-e24892efc849-2ueSQiBKiTY7tOexoI0I+QC/G2K4zDHf@public.gmane.org>
2013-06-21 14:21 ` Borislav Petkov
2013-06-21 14:21 ` Borislav Petkov
[not found] ` <20130621142101.GG22006-fF5Pk5pvG8Y@public.gmane.org>
2013-06-21 16:42 ` H. Peter Anvin
2013-06-21 16:42 ` H. Peter Anvin
[not found] ` <51C4827B.7090208-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-07-02 7:29 ` Pavel Machek
2013-07-02 7:29 ` Pavel Machek
2013-06-19 16:05 ` Matthew Garrett
2013-06-19 16:05 ` Matthew Garrett
2013-06-19 17:25 ` H. Peter Anvin
2013-06-19 17:25 ` H. Peter Anvin
[not found] ` <51C1E996.9070209-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-06-19 17:37 ` Borislav Petkov
2013-06-19 17:37 ` Borislav Petkov
[not found] ` <20130619173721.GI28300-fF5Pk5pvG8Y@public.gmane.org>
2013-06-19 17:38 ` H. Peter Anvin
2013-06-19 17:38 ` H. Peter Anvin
[not found] ` <51C1EC90.9030802-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-06-19 17:50 ` Borislav Petkov
2013-06-19 17:50 ` Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 2/4] x86, cpa: Map in an arbitrary pgd Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 3/4] x86, efi: Add an efi= kernel command line parameter Borislav Petkov
2013-06-17 17:50 ` [PATCH -v2 4/4] x86, efi: Map runtime services 1:1 Borislav Petkov
[not found] ` <1371491416-11037-5-git-send-email-bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>
2013-06-21 11:56 ` Matt Fleming
2013-06-21 11:56 ` Matt Fleming
2013-07-03 6:19 ` joeyli
2013-07-03 6:19 ` joeyli
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