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| author | Beata Michalska <beata.michalska@linaro.org> | 2019-11-21 00:08:41 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-12-16 10:46:35 +0000 |
| commit | 61c490e25e081af39ff40556f6c1229b8b011585 (patch) | |
| tree | a05523934595b80768e7060a982fbc89041bfa08 /include/exec | |
| parent | 9e70492b4389d4355ae9c9ee2ba6286cfdadc257 (diff) | |
| download | qemu-61c490e25e081af39ff40556f6c1229b8b011585.zip qemu-61c490e25e081af39ff40556f6c1229b8b011585.tar.gz qemu-61c490e25e081af39ff40556f6c1229b8b011585.tar.bz2 | |
Memory: Enable writeback for given memory region
Add an option to trigger memory writeback to sync given memory region
with the corresponding backing store, case one is available.
This extends the support for persistent memory, allowing syncing on-demand.
Signed-off-by: Beata Michalska <beata.michalska@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20191121000843.24844-3-beata.michalska@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/exec')
| -rw-r--r-- | include/exec/memory.h | 6 | ||||
| -rw-r--r-- | include/exec/ram_addr.h | 8 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index e499dc2..27a84e0 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -1265,6 +1265,12 @@ void *memory_region_get_ram_ptr(MemoryRegion *mr); */ void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp); +/** + * memory_region_do_writeback: Trigger writeback for selected address range + * [addr, addr + size] + * + */ +void memory_region_do_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size); /** * memory_region_set_log: Turn dirty logging on or off for a region. diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h index bed0554..5adebb0 100644 --- a/include/exec/ram_addr.h +++ b/include/exec/ram_addr.h @@ -174,6 +174,14 @@ void qemu_ram_free(RAMBlock *block); int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp); +void qemu_ram_writeback(RAMBlock *block, ram_addr_t start, ram_addr_t length); + +/* Clear whole block of mem */ +static inline void qemu_ram_block_writeback(RAMBlock *block) +{ + qemu_ram_writeback(block, 0, block->used_length); +} + #define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1) #define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE)) |