[Xen-changelog] [IA64] set_metaphysical_mode fix

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 986538da9be011ecceadbd400ef880e90254c798
# Parent  b579cf0ad753a6c5d599bd17d43a9a5a888276b6
[IA64] set_metaphysical_mode fix

If the old mode is metaphysical mode and the new mode is
virtual mode. set_one_rr(0, PSCB(vcpu,rrs[0]) will not
set machine region register 0, because at this time,
PSCB(vcpu,metaphysical_mode) is 1, VMM need to update
metaphysical_mode first, then call set_one_rr.

Signed-off-by: Anthony Xu <anthony.xu@xxxxxxxxx>

diff -r b579cf0ad753 -r 986538da9be0 xen/arch/ia64/xen/vcpu.c
--- a/xen/arch/ia64/xen/vcpu.c  Wed Mar 29 12:40:01 2006 -0700
+++ b/xen/arch/ia64/xen/vcpu.c  Wed Mar 29 12:41:33 2006 -0700
@@ -172,10 +172,10 @@ void vcpu_set_metaphysical_mode(VCPU *vc
 {
        /* only do something if mode changes */
        if (!!newmode ^ !!PSCB(vcpu,metaphysical_mode)) {
+               PSCB(vcpu,metaphysical_mode) = newmode;
                if (newmode) set_metaphysical_rr0();
                else if (PSCB(vcpu,rrs[0]) != -1)
                        set_one_rr(0, PSCB(vcpu,rrs[0]));
-               PSCB(vcpu,metaphysical_mode) = newmode;
        }
 }
 

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