From 9ecc996a3d39bdbf64a488936f97a9496b74ebd8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Fri, 8 May 2020 08:24:54 +0200 Subject: [PATCH] memory: Extract memory_region_msync() from memory_region_writeback() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Suggested-by: Paolo Bonzini Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Stefan Hajnoczi Reviewed-by: Richard Henderson Acked-by: Paolo Bonzini Message-id: 20200508062456.23344-3-philmd@redhat.com Signed-off-by: Stefan Hajnoczi --- include/exec/memory.h | 13 ++++++++++++- memory.c | 10 ++++++++-- 2 files changed, 20 insertions(+), 3 deletions(-) diff --git a/include/exec/memory.h b/include/exec/memory.h index 1b7cfdd5b6..3e00cdbbfa 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -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 diff --git a/memory.c b/memory.c index bb84334e1e..93febe4759 100644 --- a/memory.c +++ b/memory.c @@ -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); } }