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[Qemu-devel] [PATCH 09/21] exec.c: factor out qemu_get_ram_ptr()
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] [PATCH 09/21] exec.c: factor out qemu_get_ram_ptr() |
Date: |
Thu, 29 Dec 2011 10:25:48 +0900 |
Signed-off-by: Isaku Yamahata <address@hidden>
---
cpu-all.h | 2 ++
exec.c | 51 +++++++++++++++++++++++++++++----------------------
2 files changed, 31 insertions(+), 22 deletions(-)
diff --git a/cpu-all.h b/cpu-all.h
index 9d78715..0244f7a 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -496,6 +496,8 @@ extern RAMList ram_list;
extern const char *mem_path;
extern int mem_prealloc;
+RAMBlock *qemu_get_ram_block(ram_addr_t adar);
+
/* physical memory access */
/* MMIO pages are identified by a combination of an IO device index and
diff --git a/exec.c b/exec.c
index 32782b4..51b8d15 100644
--- a/exec.c
+++ b/exec.c
@@ -3117,15 +3117,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length)
}
#endif /* !_WIN32 */
-/* Return a host pointer to ram allocated with qemu_ram_alloc.
- With the exception of the softmmu code in this file, this should
- only be used for local memory (e.g. video ram) that the device owns,
- and knows it isn't going to access beyond the end of the block.
-
- It should not be used for general purpose DMA.
- Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
- */
-void *qemu_get_ram_ptr(ram_addr_t addr)
+RAMBlock *qemu_get_ram_block(ram_addr_t addr)
{
RAMBlock *block;
@@ -3136,19 +3128,7 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
QLIST_REMOVE(block, next);
QLIST_INSERT_HEAD(&ram_list.blocks, block, next);
}
- if (xen_enabled()) {
- /* We need to check if the requested address is in the RAM
- * because we don't want to map the entire memory in QEMU.
- * In that case just map until the end of the page.
- */
- if (block->offset == 0) {
- return xen_map_cache(addr, 0, 0);
- } else if (block->host == NULL) {
- block->host =
- xen_map_cache(block->offset, block->length, 1);
- }
- }
- return block->host + (addr - block->offset);
+ return block;
}
}
@@ -3159,6 +3139,33 @@ void *qemu_get_ram_ptr(ram_addr_t addr)
}
/* Return a host pointer to ram allocated with qemu_ram_alloc.
+ With the exception of the softmmu code in this file, this should
+ only be used for local memory (e.g. video ram) that the device owns,
+ and knows it isn't going to access beyond the end of the block.
+
+ It should not be used for general purpose DMA.
+ Use cpu_physical_memory_map/cpu_physical_memory_rw instead.
+ */
+void *qemu_get_ram_ptr(ram_addr_t addr)
+{
+ RAMBlock *block = qemu_get_ram_block(addr);
+
+ if (xen_enabled()) {
+ /* We need to check if the requested address is in the RAM
+ * because we don't want to map the entire memory in QEMU.
+ * In that case just map until the end of the page.
+ */
+ if (block->offset == 0) {
+ return xen_map_cache(addr, 0, 0);
+ } else if (block->host == NULL) {
+ block->host =
+ xen_map_cache(block->offset, block->length, 1);
+ }
+ }
+ return block->host + (addr - block->offset);
+}
+
+/* Return a host pointer to ram allocated with qemu_ram_alloc.
* Same as qemu_get_ram_ptr but avoid reordering ramblocks.
*/
void *qemu_safe_ram_ptr(ram_addr_t addr)
--
1.7.1.1
- [Qemu-devel] [PATCH 03/21] arch_init/ram_save: introduce constant for ram save version = 4, (continued)
- [Qemu-devel] [PATCH 03/21] arch_init/ram_save: introduce constant for ram save version = 4, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 05/21] arch_init/ram_save_live: factor out RAM_SAVE_FLAG_MEM_SIZE case, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 10/21] exec.c: export last_ram_offset(), Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 20/21] postcopy outgoing: add -p and -n option to migrate command, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 15/21] migration: factor out parameters into MigrationParams, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 12/21] savevm: qemu_pending_size() to return pending buffered size, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 18/21] configure: add CONFIG_POSTCOPY option, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 16/21] umem.h: import Linux umem.h, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 14/21] migration: export migrate_fd_completed() and migrate_fd_cleanup(), Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 19/21] postcopy: introduce -postcopy and -postcopy-flags option, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 09/21] exec.c: factor out qemu_get_ram_ptr(),
Isaku Yamahata <=
- [Qemu-devel] [PATCH 01/21] arch_init: export sort_ram_list() and ram_save_block(), Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 21/21] postcopy: implement postcopy livemigration, Isaku Yamahata, 2011/12/28
- [Qemu-devel] [PATCH 13/21] savevm, buffered_file: introduce method to drain buffer of buffered file, Isaku Yamahata, 2011/12/28
- Re: [Qemu-devel] [PATCH 00/21][RFC] postcopy live migration, Anthony Liguori, 2011/12/29