Message ID | 1423839431-3563-2-git-send-email-pbonzini@redhat.com |
---|---|
State | New |
Headers | show |
On Fri, 13 Feb 2015 15:57:09 +0100 Paolo Bonzini <pbonzini@redhat.com> wrote: > 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 <pbonzini@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> > --- > 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 = {
On Fri, Feb 13, 2015 at 03:57:09PM +0100, Paolo Bonzini wrote: > 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 <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> > --- > 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 >
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 = {
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 <pbonzini@redhat.com> --- hw/pci/pcie_host.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)