From: David Vrabel <david.vrabel@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
Xen-devel <xen-devel@lists.xen.org>
Cc: Yang Zhang <yang.z.zhang@intel.com>, Kevin Tian <kevin.tian@intel.com>
Subject: Re: [PATCH] VTd/dmar: Tweak how the DMAR table is clobbered
Date: Thu, 9 Apr 2015 09:51:08 +0100 [thread overview]
Message-ID: <55263D7C.6030308@citrix.com> (raw)
In-Reply-To: <1428522270-17363-1-git-send-email-andrew.cooper3@citrix.com>
On 08/04/15 20:44, Andrew Cooper wrote:
> Intead of clobbering DMAR -> XMAR and back, clobber to RMAD instead. This
> means that changing the signature does not alter the checksum, which allows
> the clobbering/unclobbering to be peformed atomically and idempotently, which
> is an advantage on the kexec path which can reenter acpi_dmar_reinstate().
Could RMAD be specified as a real table in the future? Does the
clobbered name have to start with X to avoid future conflicts?
David
next prev parent reply other threads:[~2015-04-09 8:51 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-08 19:44 [PATCH] VTd/dmar: Tweak how the DMAR table is clobbered Andrew Cooper
2015-04-09 8:51 ` David Vrabel [this message]
2015-04-09 9:48 ` Andrew Cooper
2015-04-10 1:23 ` Tian, Kevin
2015-04-10 9:08 ` Andrew Cooper
2015-04-14 7:50 ` Jan Beulich
2015-04-14 9:09 ` Andrew Cooper
2015-04-16 16:44 ` Tian, Kevin
2015-04-17 6:32 ` Jan Beulich
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