From 56918a126ae25383cb0c2c74a6f0f784a6d59ac1 Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Mon, 19 Jul 2021 19:21:04 +0800 Subject: memory: Add RAM_PROTECTED flag to skip IOMMU mappings Add a new RAMBlock flag to denote "protected" memory, i.e. memory that looks and acts like RAM but is inaccessible via normal mechanisms, including DMA. Use the flag to skip protected memory regions when mapping RAM for DMA in VFIO. Signed-off-by: Sean Christopherson Signed-off-by: Yang Zhong Signed-off-by: Paolo Bonzini --- softmmu/memory.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'softmmu/memory.c') diff --git a/softmmu/memory.c b/softmmu/memory.c index bfedaf9c4d..54cd0e9824 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -1811,6 +1811,11 @@ bool memory_region_is_ram_device(MemoryRegion *mr) return mr->ram_device; } +bool memory_region_is_protected(MemoryRegion *mr) +{ + return mr->ram && (mr->ram_block->flags & RAM_PROTECTED); +} + uint8_t memory_region_get_dirty_log_mask(MemoryRegion *mr) { uint8_t mask = mr->dirty_log_mask; -- cgit v1.2.3