Thanks Gerd, might need another rebase. I have had some users request larger memory regions.
Quoting Gerd Hoffmann <kra...@redhat.com>: > This patch adds a "use64" property which will make the ivshmem driver > register a 64bit memory bar when set, so you have something to play with > when testing 64bit pci bits. It also allows to have quite big shared > memory regions, like this: > > [root@fedora ~]# lspci -vs1:1 > 01:01.0 RAM memory: Red Hat, Inc Device 1110 > Subsystem: Red Hat, Inc Device 1100 > Physical Slot: 1-1 > Flags: fast devsel > Memory at fd400000 (32-bit, non-prefetchable) [disabled] [size=256] > Memory at 8040000000 (64-bit, prefetchable) [size=1G] > > [ v3: rebase & adapt to latest master ] > [ v2: default to on as suggested by avi, > turn off for pc-$old using compat property ] > > Signed-off-by: Gerd Hoffmann <kra...@redhat.com> Tested-by: Cam Macdonell <c...@cs.ualberta.ca> > --- > hw/ivshmem.c | 13 ++++++++++--- > hw/pc_piix.c | 4 ++++ > 2 files changed, 14 insertions(+), 3 deletions(-) > > diff --git a/hw/ivshmem.c b/hw/ivshmem.c > index 05559b6..8a776e2 100644 > --- a/hw/ivshmem.c > +++ b/hw/ivshmem.c > @@ -72,6 +72,8 @@ typedef struct IVShmemState { > MemoryRegion ivshmem; > MemoryRegion msix_bar; > uint64_t ivshmem_size; /* size of shared memory region */ > + uint32_t ivshmem_attr; > + uint32_t ivshmem_64bit; > int shm_fd; /* shared memory file descriptor */ > > Peer *peers; > @@ -344,7 +346,7 @@ static void create_shared_memory_BAR(IVShmemState *s, int > fd) { > memory_region_add_subregion(&s->bar, 0, &s->ivshmem); > > /* region for shared memory */ > - pci_register_bar(&s->dev, 2, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar); > + pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar); > } > > static void close_guest_eventfds(IVShmemState *s, int posn) > @@ -693,6 +695,11 @@ static int pci_ivshmem_init(PCIDevice *dev) > &s->ivshmem_mmio); > > memory_region_init(&s->bar, "ivshmem-bar2-container", s->ivshmem_size); > + s->ivshmem_attr = PCI_BASE_ADDRESS_SPACE_MEMORY | > + PCI_BASE_ADDRESS_MEM_PREFETCH; > + if (s->ivshmem_64bit) { > + s->ivshmem_attr |= PCI_BASE_ADDRESS_MEM_TYPE_64; > + } > > if ((s->server_chr != NULL) && > (strncmp(s->server_chr->filename, "unix:", 5) == 0)) > { > @@ -718,8 +725,7 @@ static int pci_ivshmem_init(PCIDevice *dev) > /* allocate/initialize space for interrupt handling */ > s->peers = g_malloc0(s->nb_peers * sizeof(Peer)); > > - pci_register_bar(&s->dev, 2, > - PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar); > + pci_register_bar(&s->dev, 2, s->ivshmem_attr, &s->bar); > > s->eventfd_chr = g_malloc0(s->vectors * sizeof(CharDriverState *)); > > @@ -791,6 +797,7 @@ static Property ivshmem_properties[] = { > DEFINE_PROP_BIT("msi", IVShmemState, features, IVSHMEM_MSI, true), > DEFINE_PROP_STRING("shm", IVShmemState, shmobj), > DEFINE_PROP_STRING("role", IVShmemState, role), > + DEFINE_PROP_UINT32("use64", IVShmemState, ivshmem_64bit, 1), > DEFINE_PROP_END_OF_LIST(), > }; > > diff --git a/hw/pc_piix.c b/hw/pc_piix.c > index 0c0096f..5101f5d 100644 > --- a/hw/pc_piix.c > +++ b/hw/pc_piix.c > @@ -375,6 +375,10 @@ static QEMUMachine pc_machine_v1_2 = { > .driver = "qxl",\ > .property = "vgamem_mb",\ > .value = stringify(8),\ > + },{\ > + .driver = "ivshmem",\ > + .property = "use64",\ > + .value = "0",\ > } > > static QEMUMachine pc_machine_v1_1 = { > -- > 1.7.1 > >