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exec: Fix Xen RAM allocation with unusual options 

Issues:

* We try to obey -mem-path even though it can't work with Xen.

* To implement -machine mem-merge, we call
  memory_try_enable_merging(new_block->host, size).  But with Xen,
  new_block->host remains null.  Oops.

Fix by separating Xen allocation from normal allocation.

Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Message-id: 1375276272-15988-2-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
This commit is contained in:
Markus Armbruster 2013-07-31 15:11:05 +02:00 committed by Anthony Liguori
parent 2d1fe1873a
commit dfeaf2abc7
1 changed files with 12 additions and 8 deletions
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20
exec.c
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@ -1107,6 +1107,12 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
if (host) {
new_block->host = host;
new_block->flags |= RAM_PREALLOC_MASK;
} else if (xen_enabled()) {
if (mem_path) {
fprintf(stderr, "-mem-path not supported with Xen\n");
exit(1);
}
xen_ram_alloc(new_block->offset, size, mr);
} else {
if (mem_path) {
#if defined (__linux__) && !defined(TARGET_S390X)
@ -1120,9 +1126,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
exit(1);
#endif
} else {
if (xen_enabled()) {
xen_ram_alloc(new_block->offset, size, mr);
} else if (kvm_enabled()) {
if (kvm_enabled()) {
/* some s390/kvm configurations have special constraints */
new_block->host = kvm_ram_alloc(size);
} else {
@ -1200,6 +1204,8 @@ void qemu_ram_free(ram_addr_t addr)
ram_list.version++;
if (block->flags & RAM_PREALLOC_MASK) {
;
} else if (xen_enabled()) {
xen_invalidate_map_cache_entry(block->host);
} else if (mem_path) {
#if defined (__linux__) && !defined(TARGET_S390X)
if (block->fd) {
@ -1212,11 +1218,7 @@ void qemu_ram_free(ram_addr_t addr)
abort();
#endif
} else {
if (xen_enabled()) {
xen_invalidate_map_cache_entry(block->host);
} else {
qemu_anon_ram_free(block->host, block->length);
}
qemu_anon_ram_free(block->host, block->length);
}
g_free(block);
break;
@ -1240,6 +1242,8 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
vaddr = block->host + offset;
if (block->flags & RAM_PREALLOC_MASK) {
;
} else if (xen_enabled()) {
abort();
} else {
flags = MAP_FIXED;
munmap(vaddr, length);