diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2015-01-30 12:53:19 +1100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2015-03-09 14:59:54 +0100 |
| commit | b194df478ae7607d93b47a8307e623c9f9f2b3ab (patch) | |
| tree | e971685430228c9b0755de8da0e5aaf82c80b161 /include | |
| parent | 3dab024430cf72ea65afce227585f9768fb3bfa7 (diff) | |
spapr-pci: Enable huge BARs
At the moment sPAPR only supports 512MB window for MMIO BARs. However
modern devices might want bigger 64bit BARs.
This extends MMIO window from 512MB to 62GB (aligned to
SPAPR_PCI_WINDOW_SPACING) and advertises it in 2 records in
the PHB "ranges" property. 32bit gets the space from
SPAPR_PCI_MEM_WIN_BUS_OFFSET till the end of 4GB, 64bit gets the rest
of the space. If no space is left, 64bit range is not advertised.
The MMIO space size is set to old value of 0x20000000 by default
for pseries machines older than 2.3.
The approach changes the device tree which is a guest visible change, however
it won't break migration as:
1. we do not support migration to older QEMU versions
2. migration to newer QEMU will migrate the device tree as well and since
the new layout only extends the old one and does not change address mappigns,
no breakage is expected here too.
SLOF change is required to utilize this extension.
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/pci-host/spapr.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/include/hw/pci-host/spapr.h b/include/hw/pci-host/spapr.h index 876ecf09ea..d725f0e42b 100644 --- a/include/hw/pci-host/spapr.h +++ b/include/hw/pci-host/spapr.h @@ -98,17 +98,18 @@ struct sPAPRPHBVFIOState { #define SPAPR_PCI_BASE_BUID 0x800000020000000ULL +#define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL + #define SPAPR_PCI_WINDOW_BASE 0x10000000000ULL #define SPAPR_PCI_WINDOW_SPACING 0x1000000000ULL #define SPAPR_PCI_MMIO_WIN_OFF 0xA0000000 -#define SPAPR_PCI_MMIO_WIN_SIZE 0x20000000 +#define SPAPR_PCI_MMIO_WIN_SIZE (SPAPR_PCI_WINDOW_SPACING - \ + SPAPR_PCI_MEM_WIN_BUS_OFFSET) #define SPAPR_PCI_IO_WIN_OFF 0x80000000 #define SPAPR_PCI_IO_WIN_SIZE 0x10000 #define SPAPR_PCI_MSI_WINDOW 0x40000000000ULL -#define SPAPR_PCI_MEM_WIN_BUS_OFFSET 0x80000000ULL - static inline qemu_irq spapr_phb_lsi_qirq(struct sPAPRPHBState *phb, int pin) { return xics_get_qirq(spapr->icp, phb->lsi_table[pin].irq); |