• Pavel Tatashin's avatar
    x86/xen/time: Initialize pv xen time in init_hypervisor_platform() · 7b25b9cb
    Pavel Tatashin authored
    In every hypervisor except for xen pv time ops are initialized in
    init_hypervisor_platform().
    
    Xen PV domains initialize time ops in x86_init.paging.pagetable_init(),
    by calling xen_setup_shared_info() which is a poor design, as time is
    needed prior to memory allocator.
    
    xen_setup_shared_info() is called from two places: during boot, and
    after suspend. Split the content of xen_setup_shared_info() into
    three places:
    
    1. add the clock relavent data into new xen pv init_platform vector, and
       set clock ops in there.
    
    2. move xen_setup_vcpu_info_placement() to new xen_pv_guest_late_init()
       call.
    
    3. Re-initializing parts of shared info copy to xen_pv_post_suspend() to
       be symmetric to xen_pv_pre_suspend
    Signed-off-by: default avatarPavel Tatashin <pasha.tatashin@oracle.com>
    Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    Cc: steven.sistare@oracle.com
    Cc: daniel.m.jordan@oracle.com
    Cc: linux@armlinux.org.uk
    Cc: schwidefsky@de.ibm.com
    Cc: heiko.carstens@de.ibm.com
    Cc: john.stultz@linaro.org
    Cc: sboyd@codeaurora.org
    Cc: hpa@zytor.com
    Cc: douly.fnst@cn.fujitsu.com
    Cc: peterz@infradead.org
    Cc: prarit@redhat.com
    Cc: feng.tang@intel.com
    Cc: pmladek@suse.com
    Cc: gnomes@lxorguk.ukuu.org.uk
    Cc: linux-s390@vger.kernel.org
    Cc: boris.ostrovsky@oracle.com
    Cc: jgross@suse.com
    Cc: pbonzini@redhat.com
    Link: https://lkml.kernel.org/r/20180719205545.16512-13-pasha.tatashin@oracle.com
    7b25b9cb
enlighten_pv.c 35.7 KB