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ivshmem: add 64bit option 

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]

[ v5: rebase, update compat property for post-1.2 merge ]
[ v4: rebase & adapt to latest master again ]
[ 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 <kraxel@redhat.com>
Tested-by: Cam Macdonell <cam@cs.ualberta.ca>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2012-09-13 11:08:02 +02:00 committed by Anthony Liguori
parent 183c5eaa41
commit c08ba66f13
2 changed files with 14 additions and 3 deletions
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13
hw/ivshmem.c
View File

@ -71,6 +71,8 @@ typedef struct IVShmemState {
MemoryRegion bar;
MemoryRegion ivshmem;
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;
@ -339,7 +341,7 @@ 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 ivshmem_add_eventfd(IVShmemState *s, int posn, int i)
@ -690,6 +692,11 @@ 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)) {
@ -715,8 +722,7 @@ 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 *));
@ -786,6 +792,7 @@ 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(),
};

4
hw/pc_piix.c
View File

@ -367,6 +367,10 @@ static QEMUMachine pc_machine_v1_3 = {
.driver = "nec-usb-xhci",\
.property = "msix",\
.value = "off",\
},{\
.driver = "ivshmem",\
.property = "use64",\
.value = "0",\
}
static QEMUMachine pc_machine_v1_2 = {