diff options
| author | Mattias Nissler <mnissler@rivosinc.com> | 2023-09-07 06:04:23 -0700 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@linaro.org> | 2024-05-08 19:43:23 +0200 |
| commit | 69e78f1b3484e429274352a464a94fa1d78be339 (patch) | |
| tree | 8cab73b9eaea60ab67d23add25f6ea98ef1364cd /include | |
| parent | 5c62719710bab66a98f68ebdba333e2240ed6668 (diff) | |
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')
| -rw-r--r-- | include/exec/memory.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index e1e0c5a3de..d417d7f363 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; |