path: root/xen-stub.c
diff options
authorJun Nakajima <jun.nakajima@intel.com>2010-08-31 16:41:25 +0100
committerAlexander Graf <agraf@suse.de>2011-05-08 10:10:01 +0200
commit432d268c0552fd30c8be564f7ea2504a2b546101 (patch)
treed74d75e9b70fd2ced0daf705062260dab19b40c4 /xen-stub.c
parent9c11a8ac886ccbb5f8e1b08e8ae12f045d783031 (diff)
xen: Introduce the Xen mapcache
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>
Diffstat (limited to 'xen-stub.c')
1 files changed, 4 insertions, 0 deletions
diff --git a/xen-stub.c b/xen-stub.c
index 3a8449c14..8d2fa54b4 100644
--- a/xen-stub.c
+++ b/xen-stub.c
@@ -22,6 +22,10 @@ void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
+void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size)
qemu_irq *xen_interrupt_controller_init(void)
return NULL;