From: Matt Fleming <matt.fleming@intel.com>
To: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>,
the arch/x86 maintainers <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: BUG() at boot in __phys_addr with DEBUG_VIRTUAL
Date: Thu, 13 Nov 2014 10:36:33 +0000 [thread overview]
Message-ID: <1415874993.14686.434.camel@mfleming-mobl1.ger.corp.intel.com> (raw)
In-Reply-To: <20141112172513.GC17793@pd.tnic>
On Wed, 2014-11-12 at 18:25 +0100, Borislav Petkov wrote:
>
> But before we do that: Matt, why do we need the kernel text mapped 1:1
> in the EFI page table at all?
>
> You've added this with
>
> 4f9dbcfc4029 ("x86/efi: Add mixed runtime services support")
So that when we switch into 32-bit mode we can still access the kernel
text via the 1:1 mapping in protected mode.
next prev parent reply other threads:[~2014-11-13 10:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-11 23:19 Dave Hansen
2014-11-11 23:47 ` Borislav Petkov
2014-11-12 9:24 ` Matt Fleming
2014-11-12 14:57 ` Dave Hansen
2014-11-12 15:11 ` Borislav Petkov
2014-11-12 15:20 ` Dave Hansen
2014-11-12 17:25 ` Borislav Petkov
2014-11-13 10:36 ` Matt Fleming [this message]
2014-12-09 10:35 ` Borislav Petkov
2014-11-13 13:08 ` Matt Fleming
2015-01-27 21:37 ` Matt Fleming
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