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path: root/xen-mapcache.c
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* prepare for future GPLv2+ relicensingPaolo Bonzini2012-01-131-0/+2
| | | | | | | | | All files under GPLv2 will get GPLv2+ changes starting tomorrow. event_notifier.c and exec-obsolete.h were only ever touched by Red Hat employees and can be relicensed now. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* block: convert qemu_aio_flush() calls to bdrv_drain_all()Stefan Hajnoczi2011-12-051-1/+1
| | | | | | | | | | | | | Many places in QEMU call qemu_aio_flush() to complete all pending asynchronous I/O. Most of these places actually want to drain all block requests but there is no block layer API to do so. This patch introduces the bdrv_drain_all() API to wait for requests across all BlockDriverStates to complete. As a bonus we perform checks after qemu_aio_wait() to ensure that requests really have finished. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* xen-mapcache: Fix rlimit set size.Anthony PERARD2011-09-091-5/+24
| | | | | | | | | | | | | | | | | | Previously, the address space soft limit was set mcache_max_size. So, before the mcache_max_size was reached by the mapcache, QEMU was killed for overuse of the virtual address space. This patch fix that by setting the soft limit the maximum than can have QEMU. So the soft and hard limit are always set to RLIM_INFINITY if QEMU is privileged. In case QEMU is not run as root and the limit is too low, the maximum mapcache size will be set the rlim_max - 80MB because observed that QEMU use 75MB more than the maximum mapcache size after several empirical tests. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
* Use glib memory allocation and free functionsAnthony Liguori2011-08-201-14/+14
| | | | | | qemu_malloc/qemu_free no longer exist after this commit. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* Fix a compilation error in xen-mapcache.cStefan Berger2011-07-291-2/+1
| | | | | | | | | | | This patch fixes a compilation error in xen-mapcache.c . /home/stefanb/qemu/qemu-git/xen-mapcache.c: In function ‘xen_ram_addr_from_mapcache’: /home/stefanb/qemu/qemu-git/xen-mapcache.c:240:42: error: variable ‘pentry’ set but not used [-Werror=unused-but-set-variable] cc1: all warnings being treated as errors Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
* xen: Clean up map cache API namingJan Kiszka2011-07-171-18/+23
| | | | | | | The map cache is a Xen thing, so its API should make this clear. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Alexander Graf <agraf@suse.de>
* xen: remove xen_map_block and xen_unmap_blockStefano Stabellini2011-06-191-31/+0
| | | | | | | | | Replace xen_map_block with qemu_map_cache with the appropriate locking and size parameters. Replace xen_unmap_block with qemu_invalidate_entry. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
* xen: remove qemu_map_cache_unlockStefano Stabellini2011-06-191-33/+0
| | | | | | | | There is no need for qemu_map_cache_unlock, just use qemu_invalidate_entry instead. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
* xen: fix qemu_map_cache with size != MCACHE_BUCKET_SIZEStefano Stabellini2011-06-191-12/+65
| | | | | | | | | | | | | Fix the implementation of qemu_map_cache: correctly support size arguments different from 0 or MCACHE_BUCKET_SIZE. The new implementation supports locked mapcache entries with size multiple of MCACHE_BUCKET_SIZE. qemu_invalidate_entry can correctly find and unmap these "large" mapcache entries given that the virtual address passed to qemu_invalidate_entry is the same returned by qemu_map_cache when the locked mapcache entry was created. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
* Introduce qemu_put_ram_ptrAnthony PERARD2011-05-081-0/+33
| | | | | | | | | | This function allows to unlock a ram_ptr give by qemu_get_ram_ptr. After a call to qemu_put_ram_ptr, the pointer may be unmap from QEMU when used with Xen. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
* xen: Adds a cap to the number of map cache entries.John Baboval2011-05-081-22/+15
| | | | | | | | | | | Adds a cap to the number of map cache entries. This prevents the map cache from overwhelming system memory. I also removed the bitmap macros and #included bitmap.h instead. Signed-off-By: John Baboval <john.baboval@virtualcomputer.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
* xen: Introduce the Xen mapcacheJun Nakajima2011-05-081-0/+349
On IA32 host or IA32 PAE host, at present, generally, we can't create an HVM guest with more than 2G memory, because generally it's almost impossible for Qemu to find a large enough and consecutive virtual address space to map an HVM guest's whole physical address space. The attached patch fixes this issue using dynamic mapping based on little blocks of memory. Each call to qemu_get_ram_ptr makes a call to qemu_map_cache with the lock option, so mapcache will not unmap these ram_ptr. Blocks that do not belong to the RAM, but usually to a device ROM or to a framebuffer, are handled in a separate function. So the whole RAMBlock can be map. Signed-off-by: Jun Nakajima <jun.nakajima@intel.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>