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memory: Extract memory_region_msync() from memory_region_writeback() 

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20200508062456.23344-3-philmd@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Philippe Mathieu-Daudé 2020-05-08 08:24:54 +02:00 committed by Stefan Hajnoczi
parent 4dfe59d187
commit 9ecc996a3d
2 changed files with 20 additions and 3 deletions
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13
include/exec/memory.h
View File

@ -1473,8 +1473,19 @@ void *memory_region_get_ram_ptr(MemoryRegion *mr);
*/
void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize,
Error **errp);
/**
* memory_region_writeback: Trigger cache writeback or msync for
* memory_region_msync: Synchronize selected address range of
* a memory mapped region
*
* @mr: the memory region to be msync
* @addr: the initial address of the range to be sync
* @size: the size of the range to be sync
*/
void memory_region_msync(MemoryRegion *mr, hwaddr addr, hwaddr size);
/**
* memory_region_writeback: Trigger cache writeback for
* selected address range
*
* @mr: the memory region to be updated

10
memory.c
View File

@ -2197,6 +2197,12 @@ void memory_region_ram_resize(MemoryRegion *mr, ram_addr_t newsize, Error **errp
qemu_ram_resize(mr->ram_block, newsize, errp);
}
void memory_region_msync(MemoryRegion *mr, hwaddr addr, hwaddr size)
{
if (mr->ram_block) {
qemu_ram_writeback(mr->ram_block, addr, size);
}
}
void memory_region_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
{
@ -2204,8 +2210,8 @@ void memory_region_writeback(MemoryRegion *mr, hwaddr addr, hwaddr size)
* Might be extended case needed to cover
* different types of memory regions
*/
if (mr->ram_block && mr->dirty_log_mask) {
qemu_ram_writeback(mr->ram_block, addr, size);
if (mr->dirty_log_mask) {
memory_region_msync(mr, addr, size);
}
}