diff options
| author | Marcel Apfelbaum <marcel.a@redhat.com> | 2014-04-10 21:55:21 +0300 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2014-04-16 10:49:20 -0400 |
| commit | c6e298e1f12e0f4ca02b6da5e42919ae055f6830 (patch) | |
| tree | 66f82014173389a4475dc4367051add4fb77d8e9 /src/fw/pciinit.c | |
| parent | fe2cbf6d606e138055b00b0aac6162503a5fb38d (diff) | |
| download | seabios-c6e298e1f12e0f4ca02b6da5e42919ae055f6830.tar.gz | |
hw/pci: reserve IO and mem for pci-2-pci bridges with no devices attached
If a pci-2-pci bridge supports hot-plug functionality but there are no devices
connected to it, reserve IO/mem in order to be able to attach devices
later. Do not waste space, use minimum allowed.
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Diffstat (limited to 'src/fw/pciinit.c')
| -rw-r--r-- | src/fw/pciinit.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/fw/pciinit.c b/src/fw/pciinit.c index 64f1d414..9b5d7adc 100644 --- a/src/fw/pciinit.c +++ b/src/fw/pciinit.c @@ -677,12 +677,15 @@ static int pci_bios_check_devices(struct pci_bus *busses) continue; struct pci_bus *parent = &busses[pci_bdf_to_bus(s->bus_dev->bdf)]; int type; + u8 shpc_cap = pci_find_capability(s->bus_dev, PCI_CAP_ID_SHPC); for (type = 0; type < PCI_REGION_TYPE_COUNT; type++) { u64 align = (type == PCI_REGION_TYPE_IO) ? PCI_BRIDGE_IO_MIN : PCI_BRIDGE_MEM_MIN; if (pci_region_align(&s->r[type]) > align) align = pci_region_align(&s->r[type]); u64 sum = pci_region_sum(&s->r[type]); + if (!sum && shpc_cap) + sum = align; /* reserve min size for hot-plug */ u64 size = ALIGN(sum, align); int is64 = pci_bios_bridge_region_is64(&s->r[type], s->bus_dev, type); |