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[Qemu-devel] [PATCH 1/3] pcie: remove mmconfig memory leak and wrap mmco
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 1/3] pcie: remove mmconfig memory leak and wrap mmconfig update with transaction |
Date: |
Fri, 13 Feb 2015 15:57:09 +0100 |
This memory leak was introduced inadvertently by omitting object_unparent.
A better fix is to use the new memory_region_set_size instead of destroying
and recreating the MMIO region on the fly.
Also, ensure that unmapping and remapping the region is done atomically.
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/pci/pcie_host.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/hw/pci/pcie_host.c b/hw/pci/pcie_host.c
index dfb4a2b..d8afba8 100644
--- a/hw/pci/pcie_host.c
+++ b/hw/pci/pcie_host.c
@@ -88,6 +88,8 @@ static void pcie_host_init(Object *obj)
PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
e->base_addr = PCIE_BASE_ADDR_UNMAPPED;
+ memory_region_init_io(&e->mmio, OBJECT(e), &pcie_mmcfg_ops, e,
"pcie-mmcfg-mmio",
+ PCIE_MMCFG_SIZE_MAX);
}
void pcie_host_mmcfg_unmap(PCIExpressHost *e)
@@ -104,8 +106,7 @@ void pcie_host_mmcfg_init(PCIExpressHost *e, uint32_t size)
assert(size >= PCIE_MMCFG_SIZE_MIN);
assert(size <= PCIE_MMCFG_SIZE_MAX);
e->size = size;
- memory_region_init_io(&e->mmio, OBJECT(e), &pcie_mmcfg_ops, e,
- "pcie-mmcfg", e->size);
+ memory_region_set_size(&e->mmio, e->size);
}
void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr,
@@ -121,10 +122,12 @@ void pcie_host_mmcfg_update(PCIExpressHost *e,
hwaddr addr,
uint32_t size)
{
+ memory_region_transaction_begin();
pcie_host_mmcfg_unmap(e);
if (enable) {
pcie_host_mmcfg_map(e, addr, size);
}
+ memory_region_transaction_commit();
}
static const TypeInfo pcie_host_type_info = {
--
1.8.3.1