Use the lower 3 lower bits of the system time msr to turn off the clock.
This means that all clock registration has to be aligned in a 4-byte boundary
Signed-off-by: Glauber Costa <[EMAIL PROTECTED]>
---
arch/x86/kvm/x86.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6abd784..7ce14ce 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -591,6 +591,11 @@ int kvm_set_msr_common(struct kvm_vcpu *
if (vcpu->arch.time_page)
kvm_release_page_dirty(vcpu->arch.time_page);
+ /* 4-byte unaligned accesses are invalid */
+ if (data & 0x7) {
+ vcpu->arch.time_page = NULL;
+ break;
+ }
vcpu->arch.time = data & PAGE_MASK;
vcpu->arch.time_offset = data & ~PAGE_MASK;
--
1.4.2
-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
_______________________________________________
kvm-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/kvm-devel
