[Xen-changelog] [xen master] hvm/hpet: Init comparator64 like comparator.

[patchbot@xxxxxxx]

commit fc7a9f7be97f6ece1e6507f1ee43c841dc3ecfc6
Author:     Don Slutz <dslutz@xxxxxxxxxxx>
AuthorDate: Fri May 2 16:18:05 2014 -0400
Commit:     Tim Deegan <tim@xxxxxxx>
CommitDate: Thu May 8 12:03:53 2014 +0100

    hvm/hpet: Init comparator64 like comparator.
    
    The software-developers-hpet-spec-1-0a.pdf says that the comparator
    starts as all 1's.  Also make the hidden register comparator64 the same.
    
    Since only the hidden register comparator64 is used by hpet_save, it
    needs to start out with the right value.
    
    A disabled hpet (like when a guest is starting), should start with
    the value the spec says.  Both the guest (via reading the
    comparator) and an administrator using xen-hvmctx, will see all 0's
    not all 1's.
    
    Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Tim Deegan <tim@xxxxxxx>
---
 xen/arch/x86/hvm/hpet.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/hvm/hpet.c b/xen/arch/x86/hvm/hpet.c
index b611304..741fb7a 100644
--- a/xen/arch/x86/hvm/hpet.c
+++ b/xen/arch/x86/hvm/hpet.c
@@ -636,6 +636,7 @@ void hpet_init(struct vcpu *v)
         h->hpet.timers[i].config =
             HPET_TN_INT_ROUTE_CAP | HPET_TN_64BIT_CAP | HPET_TN_PERIODIC_CAP;
         h->hpet.timers[i].cmp = ~0ULL;
+        h->hpet.comparator64[i] = ~0ULL;
         h->pt[i].source = PTSRC_isa;
     }
 }
--
generated by git-patchbot for /home/xen/git/xen.git#master

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