| commit | 1e977aa12dd4f80688b1f243762212e75c6d7fe8 | |
| author | Glauber Costa <gcosta@redhat.com> | |
| Mon, 17 Mar 2008 19:08:40 +0000 (17 16:08 -0300) | ||
| committer | Avi Kivity <avi@qumranet.com> | |
| Sun, 27 Apr 2008 09:00:31 +0000 (27 12:00 +0300) | ||
| tree | 572941849e9d63c0de7233d2352d346dc097be49 | treesnapshot (tar.gz zip) |
| parent | 3c62c62502bea24448d4e82aa1f33c7dbca61a32 | commitdiff |
x86: KVM guest: disable clock before rebooting.
This patch writes 0 (actually, what really matters is that the
LSB is cleared) to the system time msr before shutting down
the machine for kexec.
Without it, we can have a random memory location being written
when the guest comes back
It overrides the functions shutdown, used in the path of kernel_kexec() (sys.c)
and crash_shutdown, used in the path of crash_kexec() (kexec.c)
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This patch writes 0 (actually, what really matters is that the
LSB is cleared) to the system time msr before shutting down
the machine for kexec.
Without it, we can have a random memory location being written
when the guest comes back
It overrides the functions shutdown, used in the path of kernel_kexec() (sys.c)
and crash_shutdown, used in the path of crash_kexec() (kexec.c)
Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
| arch/x86/kernel/kvmclock.c | diffblobblamehistory |