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authorMattias Nissler <mnissler@rivosinc.com>2023-09-07 06:04:23 -0700
committerPhilippe Mathieu-Daudé <philmd@linaro.org>2024-05-08 19:43:23 +0200
commit69e78f1b3484e429274352a464a94fa1d78be339 (patch)
tree8cab73b9eaea60ab67d23add25f6ea98ef1364cd /include/exec
parent5c62719710bab66a98f68ebdba333e2240ed6668 (diff)
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system/physmem: Per-AddressSpace bounce buffering
Instead of using a single global bounce buffer, give each AddressSpace its own bounce buffer. The MapClient callback mechanism moves to AddressSpace accordingly. This is in preparation for generalizing bounce buffer handling further to allow multiple bounce buffers, with a total allocation limit configured per AddressSpace. Reviewed-by: Peter Xu <peterx@redhat.com> Tested-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Mattias Nissler <mnissler@rivosinc.com> Message-ID: <20240507094210.300566-2-mnissler@rivosinc.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> [PMD: Split patch, part 2/2] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Diffstat (limited to 'include/exec')
-rw-r--r--include/exec/memory.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h
index e1e0c5a..d417d7f 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1112,6 +1112,19 @@ struct MemoryListener {
QTAILQ_ENTRY(MemoryListener) link_as;
};
+typedef struct AddressSpaceMapClient {
+ QEMUBH *bh;
+ QLIST_ENTRY(AddressSpaceMapClient) link;
+} AddressSpaceMapClient;
+
+typedef struct {
+ MemoryRegion *mr;
+ void *buffer;
+ hwaddr addr;
+ hwaddr len;
+ bool in_use;
+} BounceBuffer;
+
/**
* struct AddressSpace: describes a mapping of addresses to #MemoryRegion objects
*/
@@ -1129,6 +1142,12 @@ struct AddressSpace {
struct MemoryRegionIoeventfd *ioeventfds;
QTAILQ_HEAD(, MemoryListener) listeners;
QTAILQ_ENTRY(AddressSpace) address_spaces_link;
+
+ /* Bounce buffer to use for this address space. */
+ BounceBuffer bounce;
+ /* List of callbacks to invoke when buffers free up */
+ QemuMutex map_client_list_lock;
+ QLIST_HEAD(, AddressSpaceMapClient) map_client_list;
};
typedef struct AddressSpaceDispatch AddressSpaceDispatch;