Commit Graph

5 Commits

Author SHA1 Message Date
Gerd Hoffmann
f6e16d5ad4 x86: KVM guest: Use the paravirt clocksource structs and functions
This patch updates the kvm host code to use the pvclock structs
and functions, thereby making it compatible with Xen.

The patch also fixes an initialization bug: on SMP systems the
per-cpu has two different locations early at boot and after CPU
bringup.  kvmclock must take that in account when registering the
physical address within the host.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-06-24 21:02:33 +03:00
Ingo Molnar
2ddfd20e7c namespacecheck: automated fixes
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-05-23 14:08:06 +02:00
Glauber Costa
b8ba5f10c5 x86: KVM geust: make setup_secondary_clock definition dependent on local apic
Since the pv_apic_ops are only present if CONFIG_X86_LOCAL_APIC is compiled
in, kvmclock failed to build without this option.  This patch fixes this.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-05-04 14:45:12 +03:00
Glauber Costa
1e977aa12d 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>
2008-04-27 12:00:31 +03:00
Glauber de Oliveira Costa
790c73f628 x86: KVM guest: paravirtualized clocksource
This is the guest part of kvm clock implementation
It does not do tsc-only timing, as tsc can have deltas
between cpus, and it did not seem worthy to me to keep
adjusting them.

We do use it, however, for fine-grained adjustment.

Other than that, time comes from the host.

[randy dunlap: add missing include]
[randy dunlap: disallow on Voyager or Visual WS]

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27 11:53:22 +03:00