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exec: Reduce ifdeffery around -mem-path 

Instead of spreading its ifdeffery everywhere, confine it to
qemu_ram_alloc_from_ptr().  Everywhere else, simply test block->fd,
which is non-negative exactly when block uses -mem-path.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Message-id: 1375276272-15988-4-git-send-email-armbru@redhat.com
Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
This commit is contained in:
Markus Armbruster 2013-07-31 15:11:07 +02:00 committed by Anthony Liguori
parent 0628c18267
commit 3435f39513
2 changed files with 10 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

37
exec.c
View File

@ -1099,6 +1099,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, void *host,
size = TARGET_PAGE_ALIGN(size); size = TARGET_PAGE_ALIGN(size);
new_block = g_malloc0(sizeof(*new_block)); new_block = g_malloc0(sizeof(*new_block));
new_block->fd = -1;
/* This assumes the iothread lock is taken here too. */ /* This assumes the iothread lock is taken here too. */
qemu_mutex_lock_ramlist(); qemu_mutex_lock_ramlist();
@ -1203,17 +1204,9 @@ void qemu_ram_free(ram_addr_t addr)
; ;
} else if (xen_enabled()) { } else if (xen_enabled()) {
xen_invalidate_map_cache_entry(block->host); xen_invalidate_map_cache_entry(block->host);
} else if (mem_path) { } else if (block->fd >= 0) {
#if defined (__linux__) && !defined(TARGET_S390X) munmap(block->host, block->length);
if (block->fd) { close(block->fd);
munmap(block->host, block->length);
close(block->fd);
} else {
qemu_anon_ram_free(block->host, block->length);
}
#else
abort();
#endif
} else { } else {
qemu_anon_ram_free(block->host, block->length); qemu_anon_ram_free(block->host, block->length);
} }
@ -1244,25 +1237,15 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
} else { } else {
flags = MAP_FIXED; flags = MAP_FIXED;
munmap(vaddr, length); munmap(vaddr, length);
if (mem_path) { if (block->fd >= 0) {
#if defined(__linux__) && !defined(TARGET_S390X)
if (block->fd) {
#ifdef MAP_POPULATE #ifdef MAP_POPULATE
flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED : flags |= mem_prealloc ? MAP_POPULATE | MAP_SHARED :
MAP_PRIVATE; MAP_PRIVATE;
#else #else
flags |= MAP_PRIVATE; flags |= MAP_PRIVATE;
#endif
area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, block->fd, offset);
} else {
flags |= MAP_PRIVATE | MAP_ANONYMOUS;
area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, -1, 0);
}
#else
abort();
#endif #endif
area = mmap(vaddr, length, PROT_READ | PROT_WRITE,
flags, block->fd, offset);
} else { } else {
#if defined(TARGET_S390X) && defined(CONFIG_KVM) #if defined(TARGET_S390X) && defined(CONFIG_KVM)
flags |= MAP_SHARED | MAP_ANONYMOUS; flags |= MAP_SHARED | MAP_ANONYMOUS;

2
include/exec/cpu-all.h
View File

@ -453,9 +453,7 @@ typedef struct RAMBlock {
* Writes must take both locks. * Writes must take both locks.
*/ */
QTAILQ_ENTRY(RAMBlock) next; QTAILQ_ENTRY(RAMBlock) next;
#if defined(__linux__) && !defined(TARGET_S390X)
int fd; int fd;
#endif
} RAMBlock; } RAMBlock;
typedef struct RAMList { typedef struct RAMList {