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From: Ingo Molnar <mingo@kernel.org>
To: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	"H . Peter Anvin" <hpa@zytor.com>, Toshi Kani <toshi.kani@hp.com>,
	linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
	Borislav Petkov <bp@alien8.de>,
	Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Dave Jones <davej@codemonkey.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andy Lutomirski <luto@kernel.org>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	Stephen Smalley <sds@tycho.nsa.gov>
Subject: Re: [PATCH 6/6] Documentation/x86: Update EFI memory region description
Date: Fri, 13 Nov 2015 10:22:10 +0100	[thread overview]
Message-ID: <20151113092210.GB19922@gmail.com> (raw)
In-Reply-To: <1447342823-3612-7-git-send-email-matt@codeblueprint.co.uk>


* Matt Fleming <matt@codeblueprint.co.uk> wrote:

> +We map EFI runtime services in the efi_pgd PGD in the virtual range of
> +64Gb (arbitrarily set, can be raised if needed). The mappings are not
> +part of any other kernel PGD and are only available during EFI runtime
> +calls.

Is that virtual address range 0-64Gb, i.e.:

	0x00000000.00000000 - 0x00000010.00000000

or is it somewhere else?

Thanks,

	Ingo


WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>
Cc: Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
	"H . Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
	Toshi Kani <toshi.kani-VXdhtT5mjnY@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Borislav Petkov <bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org>,
	Sai Praneeth Prakhya
	<sai.praneeth.prakhya-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Linus Torvalds
	<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	Dave Jones
	<davej-rdkfGonbjUTCLXcRTR1eJlpr/1R2p/CL@public.gmane.org>,
	Andrew Morton
	<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
	Andy Lutomirski <luto-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Denys Vlasenko <dvlasenk-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	Stephen Smalley <sds-+05T5uksL2qpZYMLLGbcSA@public.gmane.org>
Subject: Re: [PATCH 6/6] Documentation/x86: Update EFI memory region description
Date: Fri, 13 Nov 2015 10:22:10 +0100	[thread overview]
Message-ID: <20151113092210.GB19922@gmail.com> (raw)
In-Reply-To: <1447342823-3612-7-git-send-email-matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org>


* Matt Fleming <matt-mF/unelCI9GS6iBeEJttW/XRex20P6io@public.gmane.org> wrote:

> +We map EFI runtime services in the efi_pgd PGD in the virtual range of
> +64Gb (arbitrarily set, can be raised if needed). The mappings are not
> +part of any other kernel PGD and are only available during EFI runtime
> +calls.

Is that virtual address range 0-64Gb, i.e.:

	0x00000000.00000000 - 0x00000010.00000000

or is it somewhere else?

Thanks,

	Ingo

  parent reply	other threads:[~2015-11-13  9:22 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-12 15:40 [GIT PULL 0/6] EFI page table isolation Matt Fleming
2015-11-12 15:40 ` [PATCH 1/6] x86/mm/pageattr: Ensure cpa->pfn only contains page frame numbers Matt Fleming
2015-11-12 18:47   ` Borislav Petkov
2015-11-12 15:40 ` [PATCH 2/6] x86/mm/pageattr: Do not strip pte flags from cpa->pfn Matt Fleming
2015-11-12 18:47   ` Borislav Petkov
2015-11-12 18:47     ` Borislav Petkov
2015-11-12 19:28     ` Matt Fleming
2015-11-12 15:40 ` [PATCH 3/6] x86/efi: Map RAM into the identity page table for mixed mode Matt Fleming
2015-11-12 18:01   ` Borislav Petkov
2015-11-12 19:45     ` Matt Fleming
2015-11-12 15:40 ` [PATCH 4/6] x86/efi: Hoist page table switching code into efi_call_virt() Matt Fleming
2015-11-12 18:44   ` Borislav Petkov
2015-11-12 18:44     ` Borislav Petkov
2015-11-12 20:01     ` Matt Fleming
2015-11-13  7:59       ` Borislav Petkov
2015-11-13  7:59         ` Borislav Petkov
2015-11-13 16:19         ` Matt Fleming
2015-11-13 16:19           ` Matt Fleming
2015-11-12 18:47   ` Borislav Petkov
2015-11-12 18:47     ` Borislav Petkov
2015-11-12 20:15     ` Matt Fleming
2015-11-12 15:40 ` [PATCH 5/6] x86/efi: Build our own page table structures Matt Fleming
2015-11-12 15:40   ` Matt Fleming
2015-11-12 18:38   ` Borislav Petkov
2015-11-12 18:38     ` Borislav Petkov
2015-11-12 21:38     ` Matt Fleming
2015-11-12 21:38       ` Matt Fleming
2015-11-12 15:40 ` [PATCH 6/6] Documentation/x86: Update EFI memory region description Matt Fleming
2015-11-12 18:37   ` Borislav Petkov
2015-11-13  9:22   ` Ingo Molnar [this message]
2015-11-13  9:22     ` Ingo Molnar
2015-11-13  9:29     ` Matt Fleming
2015-11-13 16:42       ` Linus Torvalds
2015-11-13 16:42         ` Linus Torvalds
2015-11-13 22:22         ` Matt Fleming
2015-11-13 22:22           ` Matt Fleming
2015-11-18  8:18       ` Ingo Molnar
2015-11-18  8:18         ` Ingo Molnar
2015-11-19 11:22         ` Matt Fleming

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