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| author | Joao Martins <joao.m.martins@oracle.com> | 2017-11-08 18:19:57 +0100 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2017-11-08 22:33:14 +0100 |
| commit | 2229f70b5bbb025e1394b61007938a68060afbfb (patch) | |
| tree | 9020b4a527c21dd34cd5f38672a790b88811f585 /arch/x86/xen/suspend.c | |
| parent | x86/xen/time: set pvclock flags on xen_time_init() (diff) | |
| download | linux-2229f70b5bbb025e1394b61007938a68060afbfb.tar.xz linux-2229f70b5bbb025e1394b61007938a68060afbfb.zip | |
x86/xen/time: setup vcpu 0 time info page
In order to support pvclock vdso on xen we need to setup the time
info page for vcpu 0 and register the page with Xen using the
VCPUOP_register_vcpu_time_memory_area hypercall. This hypercall
will also forcefully update the pvti which will set some of the
necessary flags for vdso. Afterwards we check if it supports the
PVCLOCK_TSC_STABLE_BIT flag which is mandatory for having
vdso/vsyscall support. And if so, it will set the cpu 0 pvti that
will be later on used when mapping the vdso image.
The xen headers are also updated to include the new hypercall for
registering the secondary vcpu_time_info struct.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'arch/x86/xen/suspend.c')
| -rw-r--r-- | arch/x86/xen/suspend.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/xen/suspend.c b/arch/x86/xen/suspend.c index d6b1680693a9..800ed36ecfba 100644 --- a/arch/x86/xen/suspend.c +++ b/arch/x86/xen/suspend.c @@ -16,6 +16,8 @@ void xen_arch_pre_suspend(void) { + xen_save_time_memory_area(); + if (xen_pv_domain()) xen_pv_pre_suspend(); } @@ -26,6 +28,8 @@ void xen_arch_post_suspend(int cancelled) xen_pv_post_suspend(cancelled); else xen_hvm_post_suspend(cancelled); + + xen_restore_time_memory_area(); } static void xen_vcpu_notify_restore(void *data) |