From: David Vrabel <david.vrabel@citrix.com>
To: Daniel Kiper <daniel.kiper@oracle.com>,
<linux-efi@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<x86@kernel.org>, <xen-devel@lists.xenproject.org>
Cc: <mjg59@srcf.ucam.org>, <jeremy@goop.org>,
<matt.fleming@intel.com>, <ian.campbell@citrix.com>,
<andrew.cooper3@citrix.com>, <stefano.stabellini@eu.citrix.com>,
<mingo@redhat.com>, <david.vrabel@citrix.com>,
<jbeulich@suse.com>, <hpa@zytor.com>,
<boris.ostrovsky@oracle.com>, <tglx@linutronix.de>,
<eshelton@pobox.com>
Subject: Re: [Xen-devel] [PATCH v6 7/9] xen: Put EFI machinery in place
Date: Mon, 23 Jun 2014 10:57:31 +0100 [thread overview]
Message-ID: <53A7FA0B.4070106@citrix.com> (raw)
In-Reply-To: <1403299768-9955-8-git-send-email-daniel.kiper@oracle.com>
On 20/06/14 22:29, Daniel Kiper wrote:
> This patch enables EFI usage under Xen dom0. Standard EFI Linux
> Kernel infrastructure cannot be used because it requires direct
> access to EFI data and code. However, in dom0 case it is not possible
> because above mentioned EFI stuff is fully owned and controlled
> by Xen hypervisor. In this case all calls from dom0 to EFI must
> be requested via special hypercall which in turn executes relevant
> EFI code in behalf of dom0.
>
> When dom0 kernel boots it checks for EFI availability on a machine.
> If it is detected then artificial EFI system table is filled.
> Native EFI callas are replaced by functions which mimics them
> by calling relevant hypercall. Later pointer to EFI system table
> is passed to standard EFI machinery and it continues EFI subsystem
> initialization taking into account that there is no direct access
> to EFI boot services, runtime, tables, structures, etc. After that
> system runs as usual.
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
(With or without the change suggested by Stefano).
Thanks.
David
next prev parent reply other threads:[~2014-06-23 9:57 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-20 21:29 [PATCH v6 0/9] xen: Add EFI support Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 1/9] efi: Use early_mem*() instead of early_io*() Daniel Kiper
2014-06-23 7:19 ` Jan Beulich
2014-06-23 13:54 ` Daniel Kiper
2014-06-24 17:56 ` Luck, Tony
2014-06-20 21:29 ` [PATCH v6 2/9] arch/x86: Do not access EFI memory map if it is not available Daniel Kiper
2014-06-23 9:53 ` David Vrabel
2014-06-23 11:00 ` Jan Beulich
2014-06-23 14:13 ` Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 3/9] efi: Introduce EFI_PARAVIRT flag Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 4/9] arch/x86: Remove redundant set_bit(EFI_SYSTEM_TABLES) call Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 5/9] arch/x86: Remove redundant set_bit(EFI_MEMMAP) call Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 6/9] xen: Define EFI related stuff Daniel Kiper
2014-06-23 9:50 ` David Vrabel
2014-06-20 21:29 ` [PATCH v6 7/9] xen: Put EFI machinery in place Daniel Kiper
2014-06-21 14:53 ` Stefano Stabellini
2014-06-23 9:57 ` David Vrabel [this message]
2014-06-23 13:57 ` [Xen-devel] " Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 8/9] arch/x86: Replace plain strings with constants Daniel Kiper
2014-06-20 21:29 ` [PATCH v6 9/9] arch/x86: Remove efi_set_rtc_mmss() Daniel Kiper
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