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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2015-11-05 18:11:04 +0000 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2015-11-10 15:00:27 +0100 |
| commit | f0a227ade4b0331c9e12fc01f8b74e2531fd496d (patch) | |
| tree | 23a8a5aa128c2ebb7410146c3c40aacbbe244765 /include/migration | |
| parent | 1caddf8a819d83027d897997c0af10c426f88633 (diff) | |
| download | qemu-f0a227ade4b0331c9e12fc01f8b74e2531fd496d.tar.gz qemu-f0a227ade4b0331c9e12fc01f8b74e2531fd496d.tar.bz2 qemu-f0a227ade4b0331c9e12fc01f8b74e2531fd496d.zip | |
postcopy: ram_enable_notify to switch on userfault
Mark the area of RAM as 'userfault'
Start up a fault-thread to handle any userfaults we might receive
from it (to be filled in later)
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'include/migration')
| -rw-r--r-- | include/migration/migration.h | 3 | ||||
| -rw-r--r-- | include/migration/postcopy-ram.h | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h index 6e42b58dc3..2ad0d2b9dd 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -86,6 +86,9 @@ struct MigrationIncomingState { */ QemuEvent main_thread_load_event; + QemuThread fault_thread; + QemuSemaphore fault_thread_sem; + /* For the kernel to send us notifications */ int userfault_fd; QEMUFile *to_src_file; diff --git a/include/migration/postcopy-ram.h b/include/migration/postcopy-ram.h index f87020c582..b10c03db6e 100644 --- a/include/migration/postcopy-ram.h +++ b/include/migration/postcopy-ram.h @@ -17,6 +17,12 @@ bool postcopy_ram_supported_by_host(void); /* + * Make all of RAM sensitive to accesses to areas that haven't yet been written + * and wire up anything necessary to deal with it. + */ +int postcopy_ram_enable_notify(MigrationIncomingState *mis); + +/* * Initialise postcopy-ram, setting the RAM to a state where we can go into * postcopy later; must be called prior to any precopy. * called from ram.c's similarly named ram_postcopy_incoming_init |