From: Avi Kivity <avi@redhat.com>
Date: Mon, 27 Aug 2012 20:46:17 +0000 (+0300)
Subject: KVM: x86 emulator: access GPRs on demand
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~15^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd856efafe6097a5c9104725c2bca74430423db8;p=pandora-kernel.git

KVM: x86 emulator: access GPRs on demand

Instead of populating the entire register file, read in registers
as they are accessed, and write back only the modified ones.  This
saves a VMREAD and VMWRITE on Intel (for rsp, since it is not usually
used during emulation), and a two 128-byte copies for the registers.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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