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[Qemu-devel] [RFC PATCH 2/8] exec: check MRU in qemu_ram_addr_from_host
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [RFC PATCH 2/8] exec: check MRU in qemu_ram_addr_from_host |
Date: |
Mon, 6 May 2013 16:25:15 +0200 |
This function is not used outside the iothread mutex, so it
can use ram_list.mru_block.
Signed-off-by: Paolo Bonzini <address@hidden>
---
exec.c | 12 ++++++++++--
1 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/exec.c b/exec.c
index 9f324bb..8e46228 100644
--- a/exec.c
+++ b/exec.c
@@ -1404,18 +1404,26 @@ int qemu_ram_addr_from_host(void *ptr, ram_addr_t
*ram_addr)
return 0;
}
+ block = ram_list.mru_block;
+ if (block && block->host && host - block->host < block->length) {
+ goto found;
+ }
+
QTAILQ_FOREACH(block, &ram_list.blocks, next) {
/* This case append when the block is not mapped. */
if (block->host == NULL) {
continue;
}
if (host - block->host < block->length) {
- *ram_addr = block->offset + (host - block->host);
- return 0;
+ goto found;
}
}
return -1;
+
+found:
+ *ram_addr = block->offset + (host - block->host);
+ return 0;
}
/* Some of the softmmu routines need to translate from a host pointer
--
1.7.1
- [Qemu-devel] [RFC PATCH 0/8] MemoryRegion and FlatView refcounting, replace hostmem with memory_region_find, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 2/8] exec: check MRU in qemu_ram_addr_from_host,
Paolo Bonzini <=
- [Qemu-devel] [RFC PATCH 1/8] memory: add ref/unref calls, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 4/8] memory: ref/unref memory across address_space_map/unmap, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 3/8] memory: return MemoryRegion from qemu_ram_addr_from_host, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 5/8] memory: access FlatView from a local variable, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 6/8] memory: use a new FlatView pointer on every topology update, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 7/8] memory: add reference counting to FlatView, Paolo Bonzini, 2013/05/06
- [Qemu-devel] [RFC PATCH 8/8] dataplane: replace hostmem with memory_region_find, Paolo Bonzini, 2013/05/06
- Re: [Qemu-devel] [RFC PATCH 0/8] MemoryRegion and FlatView refcounting, replace hostmem with memory_region_find, liu ping fan, 2013/05/08